Patent Application
20240356228
This application relates to the field of antennas, and in particular, to an antenna system and an electronic device.
As 5G technologies gradually develop and are popularized, more antennas need to be integrated into a terminal device. When a plurality of antennas operate, if isolation between the antennas is poor, the antennas are coupled to each other. Consequently, a data throughput of the terminal device is limited, and user experience is affected. Even channel blockage or component damage is caused when a high-power transmit signal is coupled into another transceiver channel. Therefore, mutual coupling between the plurality of antennas becomes an urgent problem to be resolved in the industry.
In the conventional technology, the mutual coupling between the plurality of antennas may be decoupled through an orthogonal-mode decoupling technology or a mode-offsetting decoupling technology, to improve isolation between the antennas.
However, in the orthogonal-mode decoupling technology, decoupling can be implemented only when there are two or more orthogonal characteristic modes of antennas and different feeding designs are combined. In the mode cancellation decoupling technology, decoupling between antennas needs to be performed at a cost of half of an antenna diameter. Consequently, efficiency of a single antenna is low, and miniaturization of the antenna diameter is difficult to implement when efficiency of each antenna is ensured.
It can be learned that in the conventional technology, for an antenna in a single characteristic mode, it is difficult to consider both high isolation of antennas and miniaturization of an antenna diameter.
An objective of this application is to resolve a problem in the conventional technology that both high isolation of antennas and miniaturization of an antenna diameter are difficult to be considered for an antenna in a single characteristic mode. Therefore, this application provides an antenna system and an electronic device, so that high isolation is generated at two ends (a grounding end and a radio frequency end) of respective radio frequency sources of a first antenna and a second antenna, to implement high isolation between the first antenna and the second antenna (or may be understood as decoupling between the first antenna and the second antenna).
An embodiment of this application provides an antenna system including
a first antenna, a second antenna, and a ground. The first antenna includes a first radiator and a second radiator, and the second antenna includes the first radiator and a third radiator.
Two ends of the first radiator are electrically connected to the ground separately.
A first end of the second radiator is relatively far away from a first end of the third radiator, the first end of the second radiator and the first end of the third radiator are separately connected to or coupled to the first radiator, and a second end of the second radiator is disposed opposite to a second end of the third radiator, to form a gap.
The second radiator includes a first feeding connection point, and the antenna system feeds the first antenna through the first feeding connection point. The third radiator includes a second feeding connection point, and the antenna system feeds the second antenna through the second feeding connection point.
The first radiator and the ground are enclosed to form a closed slit. The first radiator, the second radiator, the third radiator, and the gap are enclosed to form a non-closed slit. The first feeding connection point of the second radiator is connected to a feeding end of a first radio frequency source of the electronic device, to receive a radio frequency signal output by the first radio frequency source, so that the first antenna radiates outward, and a grounding end of the first radio frequency source is connected to the ground. The second feeding connection point of the third radiator is connected to a feeding end of a second radio frequency source, to receive a radio frequency signal output by the second radio frequency source, so that the second antenna radiates outward, and a grounding end of the second radio frequency source is connected to the ground.
In this embodiment of this application, a new antenna system is constructed by the second radiator and the third radiator that are separately connected to the first radiator, the first radio frequency source connected between the second radiator and the ground, and the second radio frequency source connected between the third radiator and the ground. The antenna system with the structure can implement the following. When the first radio frequency source performs excitation, a current generated at a location to which the feeding end of the first radio frequency source is connected on the first antenna and a current generated at a location to which the grounding end of the first radio frequency source is connected on the ground are in a co-current mode. In addition, a current generated at a location to which the feeding end of the second radio frequency source is connected on the second antenna and a current generated at a location to which the grounding end of the second radio frequency source is connected on the ground are in a reverse current mode. Similarly, when the second radio frequency source performs excitation, a current generated at a location to which the feeding end of the first radio frequency source is connected on the first antenna and a current generated at a location to which the grounding end of the first radio frequency source is connected on the ground are in a reverse current mode. In addition, a current generated at a location to which the feeding end of the second radio frequency source is connected on the second antenna and a current generated at a location to which the grounding end of the second radio frequency source is connected on the ground are in a co-current mode.
Because the co-current mode and the reverse current mode form mode orthogonality, that is, when the first radio frequency source performs excitation, a current mode generated at locations to which two ends (the grounding end and the feeding end) of the first radio frequency source are connected on the first antenna and a current mode generated at locations to which two ends (the grounding end and the feeding end) of the second radio frequency source are connected on the second antenna form mode orthogonality. Similarly, when the second radio frequency source performs excitation, a current mode generated at locations to which two ends (the grounding end and the feeding end) of the first radio frequency source are connected on the first antenna and a current mode generated at locations to which two ends (the grounding end and the feeding end) of the second radio frequency source are connected on the second antenna also form mode orthogonality. Therefore, in this embodiment of this application, the following can be implemented by using the structure. When the first antenna and the second antenna simultaneously perform excitation, high isolation is generated at the two ends (the grounding end and the feeding end) of the respective radio frequency sources of the first antenna and the second antenna, so that high isolation is generated between the first antenna and the second antenna. To be specific, the first antenna and the second antenna are decoupled.
Further, in this embodiment of this application, because the first antenna and the second antenna share the first radiator, two antennas can be constructed under a condition of a conventional antenna with a closed slit and a same diameter. Therefore, bandwidth efficiency of the antennas is increased by at least one time. In other words, under a condition of same bandwidth efficiency, compared with an antenna diameter of a conventional antenna with a closed slit, an antenna diameter of the antenna system in this embodiment of this application may be reduced by at least half. Therefore, compared with the conventional antenna with the closed slit, the antenna system in this embodiment can implement miniaturization of an antenna diameter.
In some possible embodiments, in a width direction of the closed slit, the non-closed slit is located on a side that is of the first radiator and that is close to the closed slit.
In some possible embodiments, in a width direction of the closed slit, the non-closed slit is located on a side that is of the first radiator and that is away from the closed slit.
In some possible embodiments, in a thickness direction of the closed slit, the non-closed slit partially overlaps the first radiator, and is located on a side that is of the first radiator and that is away from the ground.
In some embodiments, the antenna system further includes an tuning component. One end of the tuning component is connected to the first radiator, and another end of the tuning component is connected to the ground. The tuning component is a capacitor and/or an inductor.
In this embodiment, a direction of a current on the closed slit can be adjusted by using the capacitor or the inductor disposed between the first radiator and the ground. Specifically, the direction of the current on the closed slit can be adjusted by selecting a capacitor or an inductor that matches an antenna diameter. Further, when the first radio frequency source performs excitation or the second radio frequency source performs excitation, a current mode generated at locations to which two ends (the feeding end and the grounding end) of the first radio frequency source are connected on the first antenna and a current mode generated at locations to which two ends (the feeding end and the grounding end) of the second radio frequency source are connected on the second antenna form mode orthogonality. To be specific, there is high isolation between the first antenna and the second antenna. In addition, an antenna diameter (or may be understood as a length of the closed slit) has a wide selection range, to provide a basis for application of the antenna system in this embodiment in different application scenarios.
In some embodiments, the first radiator, the second radiator, the third radiator, and the gap form the non-closed slit. In a length direction of the non-closed slit, a connection point formed by connecting the tuning component to the first radiator is located between the first feeding connection point and the second feeding connection point.
In some possible embodiments, a grounding point formed by connecting the tuning component to the ground is located between a first feeding grounding point formed by connecting the grounding end of the first radio frequency source to the ground and a second feeding grounding point formed by connecting the grounding end of the second radio frequency source to the ground.
In some possible embodiments, the grounding point formed by connecting the tuning component to the ground is located in a ground area that is on the ground and that is opposite to the gap, and the connection point formed by connecting the tuning component to the first radiator is located in a radiator section that is on the first radiator and that is opposite to the gap.
In some embodiments, the capacitor is disposed at the gap, and two ends of the capacitor are respectively connected to the second end of the second radiator and the second end of the third radiator.
In some embodiments, both the second radiator and the third radiator are in an L shape.
In some embodiments, the second radiator is configured with one or more first slots, and/or the third radiator is configured with one or more second slots.
In some possible embodiments, one of the second radiator and the third radiator is in an L shape, and the other radiator includes an L-shaped radiator section and at least one suspended radiator section. An end that is of the L-shaped radiator section and that is away from the at least one suspended radiator section is a first end of the other radiator, and an end that is of the at least one suspended radiator section and that is away from the L-shaped radiator section is a second end of the other radiator.
The other radiator receives a radio frequency signal through the L-shaped radiator section or any one of the at least one suspended radiator section.
Alternatively,
both the second radiator and the third radiator include an L-shaped radiator section and at least one suspended radiator section. In the second radiator, an end that is of the L-shaped radiator section and that is away from the at least one suspended radiator section is a first end of the second radiator, and an end that is of the at least one suspended radiator section and that is away from the L-shaped radiator section is a second end of the second radiator. The first feeding connection point is disposed on the L-shaped radiator in the second radiator or any one of the at least one suspended radiator section.
In the third radiator, an end that is of the L-shaped radiator section and that is away from the at least one suspended radiator section is a first end of the third radiator, and an end that is of the at least one suspended radiator section and that is away from the L-shaped radiator section is a second end of the third radiator. The second feeding connection point is disposed on the L-shaped radiator in the third radiator or any one of the at least one suspended radiator section.
In some embodiments, a capacitor is disposed at at least one of the first slots and the second slots.
In some possible embodiments, a capacitor is disposed at each first slot and each second slot.
In some possible embodiments, the L-shaped radiator section is connected, via a capacitor, to an end that is of the at least one suspended radiator section and that is close to the L-shaped radiator section.
When the at least one suspended radiator section is a plurality of suspended radiator sections, each suspended radiator section is connected to an adjacent suspended radiator section via a capacitor.
In this embodiment of this application, the L-shaped radiator section and the at least one suspended radiator section are used, and the second radiator and/or the third radiator are/is formed after the radiator sections are connected via a capacitor. This structure can further help miniaturize an antenna diameter, and reduce an SAR value (Specific Absorption Ratio, specific absorption ratio) of the antenna system.
In some embodiments, a length of the closed slit is greater than or equal to ½ times a wavelength of the first antenna or the second antenna and is less than one time a wavelength of the first antenna or the second antenna.
In some possible embodiments, the first feeding grounding point formed by connecting the grounding end of the first radio frequency source to the ground and the first feeding connection point formed by connecting the feeding end of the first radio frequency source to the second radiator are both located on one side of the gap, and the second feeding grounding point formed by connecting the grounding end of the second radio frequency source to the ground and the second feeding connection point formed by connecting the feeding end of the second radio frequency source to the third radiator are both located on the other side of the gap. In addition, both the first feeding grounding point formed by connecting the grounding end of the first radio frequency source to the ground and the second feeding grounding point formed by connecting the grounding end of the second radio frequency source to the ground are located in the closed slit.
In some possible embodiments, the first feeding grounding point formed by connecting the grounding end of the first radio frequency source to the ground and the first feeding connection point formed by connecting the feeding end of the first radio frequency source to the second radiator are aligned in the width direction of the closed slit. The second feeding grounding point formed by connecting the grounding end of the second radio frequency source to the ground and the second feeding connection point formed by connecting the feeding end of the second radio frequency source to the third radiator are aligned in the width direction of the closed slit.
In some embodiments, the first radio frequency source and the second radio frequency source are different radio frequency sources or a same radio frequency source.
An embodiment of this application provides an electronic device, including the antenna system provided in any one of the foregoing embodiments or any possible embodiment.
In some embodiments, the first radiator is formed by a metal frame of the electronic device or an embedded metal structure part embedded in the metal frame. The second radiator and the third radiator are both formed by the metal structure part of the electronic device, or are both formed on a support of the electronic device through a laser direct structuring process.
In some embodiments, the first radiator is formed by a metal frame of the electronic device, and both the second radiator and the third radiator are formed by an embedded metal structure part embedded in the metal frame in the electronic device.
In some embodiments, the first radiator is formed by a metal battery cover of the electronic device or a metal middle frame of the electronic device; and the second radiator and the third radiator are both formed by a metal frame of the electronic device, or are both formed by an embedded metal structural part embedded in the metal frame, or are both formed on a support of the electronic device through a laser direct structuring process.
The following describes implementations of this application by using specific embodiments. A person skilled in the art may easily understand other advantages and effects of this application from content disclosed in this specification. Although descriptions of this application are described with reference to some embodiments, it does not mean that features of this application are limited to the implementations. On the contrary, a purpose of introducing the application with reference to the implementations is to cover other options or modifications that may be extended based on the claims of this application. To provide a deep understanding of this application, the following descriptions include many specific details. This application may also be implemented without using these details. In addition, to avoid confusion or obscureness of a focus of this application, some specific details are omitted in the descriptions. It should be noted that, in a case of no conflict, embodiments in this application and features in the embodiments may be mutually combined.
It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, the item does not need to be further defined and explained in subsequent accompanying drawings.
In the description of this application, it should be noted that orientation or location relationships indicated by terms such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside”, and “outside” are orientation or location relationships shown in the accompanying drawings, and are merely for ease of description and simplification of this application, instead of indicating or implying that a specified apparatus or element needs to have a specific orientation, and is constructed and operated in a specific orientation, and therefore the orientation or location relationships cannot be construed as a limitation on this application. It should be noted that terms “first”, “second”, and the like are used only for description, and cannot be understood as indicating or implying relative importance.
In the description of this application, it should be noted that, unless otherwise specified and limited, terms “installation”, “connection”, and “connected” should be understood in a broad sense. For example, “connection” may be a fixed connection, a detachable connection, or an integrated connection; may be a mechanical connection, or an electrical connection; and may be a direct connection, an indirect connection via an intermediate medium, or communication between two elements. For a person of ordinary skill in the art, a specific meaning of the foregoing terms in this application may be understood according to a specific situation.
In the description of this application, it should be understood that, in this application, “electrical connection” may be understood as a form in which components are physically in contact and electrically conductive, or may be understood as a form in which different components in a line structure are connected through physical lines that can transmit an electrical signal, such as a printed circuit board (printed circuit board, PCB) copper foil or a conducting wire. “Coupled through . . . ” can be understood as that electricity is remotely conducted in an indirect coupling manner. Indirect coupling may be understood as contactless coupling. A person skilled in the art may understand that a coupling phenomenon is a phenomenon that an input and output of two or more circuit elements or electrical networks closely cooperate with each other and affect each other, and energy is transmitted from one side to the other side through interaction. To make the objectives, technical solutions, and advantages of this application clearer, the following further describes the implementations of this application in detail with reference to the accompanying drawings.
Refer to
As shown in
Two ends of the first radiator 11 are separately connected to a ground, and a grounding point B3 and a grounding point B4 are formed on the ground. The two ends of the first radiator 11 may be directly connected to the ground, or may be indirectly connected to the ground through a connector, for example, a conductor or a conducting wire. In addition, the first radiator 11 and the ground are enclosed to form a closed slit 14 (namely, a closed slit 14 shown in
In an implementation, as shown in
In another implementation, the first end of the second radiator 12 and the first end of the third radiator 13 may also be coupled to the first radiator, that is: The first end of the second radiator 12 is not directly connected to the first radiator 11, a slot is formed between the first end of the second radiator 12 and the first radiator 11, and radiation energy is coupled through the slot; and the first end of the third radiator 13 is also not directly connected to the first radiator 11, a slot is formed between the first end of the third radiator 13 and the first radiator 11, and radiation energy is coupled through the slot.
The slot may be formed in a width direction parallel to the closed slit, or may be formed in a thickness direction parallel to the closed slit.
It should be noted that an end or the first end and the second end are not limited to an end face of the radiator, and may also be a section of the radiator including the end face, for example, a radiator section within 1 mm and 2 mm away from the end face.
Further, the second radiator 12 may be coupled through a coupling stub located in the slot between the second radiator 12 and the first radiator 11. The coupling stub may be connected to the first radiator 11, or may not be connected to the first radiator 11. The third radiator 13 may be coupled through a coupling stub located in the slot between the third radiator 13 and the first radiator 11. The coupling stub may be connected to the first radiator 11, or may not be connected to the first radiator 11. Sizes of the slot and the coupling stub are not limited, and do not depart from the scope of this application provided that the sizes can meet an energy coupling requirement.
The second radiator 12 includes a first feeding connection point A1, and the antenna system 1 feeds the first antenna through the first feeding connection point A1. The third radiator 13 includes a second feeding connection point A2, and the antenna system 1 feeds the second antenna through the second feeding connection point A2.
Specifically, the first feeding connection point A1 of the second radiator 12 is connected to a feeding end of a first radio frequency source RF 1 of the electronic device, to receive a radio frequency signal output by the first radio frequency source RF 1, so that the first antenna radiates outward, and a grounding end of the first radio frequency source RF 1 is connected to the ground. The second feeding connection point A2 of the third radiator 13 is connected to a feeding end of a second radio frequency source RF 2 of the electronic device, to receive a radio frequency signal output by the second radio frequency source RF 2, so that the second antenna radiates outward, and a grounding end of the second radio frequency source RF 2 is connected to the ground. The second radiator 12 may be directly connected to the feeding end of the first radio frequency source RF 1 of the electronic device, or may be connected to the feeding end of the first radio frequency source RF 1 through a radio frequency source connector 21 (as shown in
In this embodiment, the second radiator 12 may be connected to the first radio frequency source RF 1 through a coaxial cable, and specifically, may be connected to the feeding end of the first radio frequency source RF 1 through an inner core of the coaxial cable. The third radiator 13 may also be connected to the second radio frequency source RF 2 through a coaxial cable, and specifically, may be connected to the feeding end of the second radio frequency source RF 2 through an inner core of the coaxial cable. Certainly, a person skilled in the art may understand that the feeding end may also be another alternative solution, and does not limit the protection scope of this application herein.
It should be noted that, in this embodiment, the first radio frequency source RF 1 and the second radio frequency source RF 2 are different radio frequency sources.
Further, a capacitor C is disposed between the second radiator 12 and the third radiator 13. The capacitor C is configured to adjust a location of a reverse point (which may be understood with reference to a reverse point mentioned below) generated when a current flow passes through each radiator and the ground, so that a current mode generated at locations to which two ends (a grounding end and a feeding end) of the first radio frequency source are connected on the first antenna and a current mode generated at locations to which two ends (a grounding end and a feeding end) of the second radio frequency source are connected on the second antenna can form mode orthogonality. In this way, high isolation is formed between the first antenna and the second antenna. Certainly, a person skilled in the art may understand that no capacitor may be disposed between the second radiator 12 and the third radiator 13, provided that the foregoing current modes are orthogonal during design, and high isolation is formed between the first antenna and the second antenna.
The antenna system in embodiments may be applied to a plurality of electronic devices having a signal transmission function, for example, the antenna system may be applied to electronic devices such as a watch, a mobile phone, a wearable intelligent device, and a smart home device. A type of the antenna system is not limited. For example, the antenna system may be a 5G mobile communication antenna (MIMO), for example, a primary LTE transceiver antenna or a secondary LTE transceiver antenna, or may be a short-range communications antenna, for example, a V2X-1 transceiver antenna or a Wi-Fi/BLE antenna, or may be a radio antenna. In addition, in the antenna system in embodiments, the first antenna and the second antenna may operate in a same frequency band, for example, any frequency band within 6 GHz, or may operate in different frequency bands. For example, a difference between center frequencies of the first antenna and the second antenna in operating frequency bands may be 1 GHz. Specifically, the first antenna and the second antenna may respectively operate in a frequency sub-band whose frequency range is 724 MHz to 788 MHz, a frequency sub-band whose frequency range is 791 MHz to 860 MHz, a frequency sub-band whose frequency range is 824 MHz to 894 MHz, a frequency sub-band whose frequency range is 880 MHz to 960 MHz, and the like.
Further, refer to
Further, a processing process of each component in this embodiment is not limited. For example, the first radiator 11 may be welded on the PCB board 20, or may be directly formed on the PCB board 20 after a through slot that is closed around is processed on the PCB board to form a closed slit 14. Certainly, a person skilled in the art may understand that there may also be another alternative solution, and the protection scope of this application is not limited herein.
In a specific operating process, as shown in
When the second radio frequency source RF 2 performs excitation, a current generated at the first feeding connection point A1 (namely, a location to which the feeding end of the first radio frequency source is connected) of the first antenna is shown by a dashed line arrow closest to the first feeding connection point A1 in
Therefore, regardless of whether the first radio frequency source RF 1 performs excitation or the second radio frequency source RF 2 performs excitation, the current mode of the first antenna for two ends (the first feeding connection point A1 and the first feeding grounding point B1) of the first radio frequency source RF 1 and the current mode of the second antenna for two ends (the second feeding connection point A2 and the second feeding grounding point B2) of the second radio frequency source RF 2 can always form mode orthogonality, to generate high isolation.
In this embodiment of this application, a new antenna system is constructed by the second radiator and the third radiator that are separately connected to the first radiator, the first radio frequency source connected between the second radiator and the ground, and the second radio frequency source connected between the third radiator and the ground. The antenna system with the structure can implement the following.
When the first radio frequency source performs excitation, a current generated at a location to which the feeding end of the first radio frequency source is connected (namely, the first feeding connection point A1) on the first antenna and a current generated at a location to which the grounding end of the first radio frequency source is connected (namely, the first feeding grounding point B1) on the ground are in a co-current mode. In addition, a current generated at a location to which the feeding end of the second radio frequency source is connected (namely, the second feeding connection point A2) on the second antenna and a current generated at a location to which the grounding end of the second radio frequency source is connected (namely, the second feeding grounding point B2) on the ground are in a reverse current mode.
Similarly, when the second radio frequency source performs excitation, a current generated at a location to which the feeding end of the first radio frequency source is connected (namely, the first feeding connection point A1) on the first antenna and a current generated at a location to which the grounding end of the first radio frequency source is connected (namely, the first feeding grounding point B1) on the ground are in a reverse current mode. In addition, a current generated at a location to which the feeding end of the second radio frequency source is connected (namely, the second feeding connection point A2) on the second antenna and a current generated at a location to which the grounding end of the second radio frequency source is connected (namely, the second feeding grounding point B2) on the ground are in a co-current mode.
Further, because the co-current mode and the reverse current mode form mode orthogonality, that is, when the first radio frequency source performs excitation, a current mode generated at locations to which two ends (the grounding end and the feeding end) of the first radio frequency source are connected on the first antenna and a current mode generated at locations to which two ends (the grounding end and the feeding end) of the second radio frequency source are connected on the second antenna form mode orthogonality. Similarly, when the second radio frequency source performs excitation, a current mode generated at locations to which two ends (the grounding end and the feeding end) of the first radio frequency source are connected on the first antenna and a current mode generated at locations to which two ends (the grounding end and the feeding end) of the second radio frequency source are connected on the second antenna also form mode orthogonality. Therefore, in this embodiment of this application, the following can be implemented by using the structure. When the first antenna and the second antenna simultaneously perform excitation, high isolation is generated at the two ends of the respective radio frequency sources of the first antenna and the second antenna, to form high isolation between the first antenna and the second antenna, so that the first antenna and the second antenna are decoupled.
The reverse point mentioned above may be understood as a point at which currents flowing on two sides are in opposite current directions. It can be learned from
Further, in this embodiment of this application, because the first antenna and the second antenna share the first radiator, two antennas can be constructed under a condition that a diameter is the same as that of a conventional single antenna with a closed slit. Therefore, bandwidth efficiency of the antennas is increased by at least one time. In other words, under a condition of same bandwidth efficiency, compared with an antenna diameter of a conventional single antenna with a closed slit, an antenna diameter of the antenna system in this embodiment of this application may be reduced by at least half. Therefore, compared with the conventional single antenna with the closed slit, the antenna system in this embodiment can implement miniaturization of an antenna diameter.
In addition, in this embodiment of this application, asymmetric feeding is used, for example, anti-symmetric feeding, and a complex feeding network does not need to be designed. This has advantages of a simple feeding structure and low sensitivity to a complex environment.
An embodiment of this application further provides an electronic device, including the antenna system 1 in any one of the foregoing implementations.
Further, in this implementation, both the first feeding connection point A1 and the first feeding grounding point B1 of the first radio frequency source RF 1 are located on one side of the gap 10, and both the second feeding connection point A2 and the second feeding grounding point B2 of the second radio frequency source RF 2 are located on the other side of the gap 10. In addition, both the first feeding grounding point B1 of the first radio frequency source RF 1 and the second feeding grounding point B2 of the second radio frequency source RF 2 are located in the closed slit 14, specifically, may be located between a grounding point B3 and a grounding point B4. In some solutions, the first feeding connection point A1 of the first radio frequency source RF 1 and the second feeding connection point A2 of the second radio frequency source RF 2 may be symmetrical about the gap 10. In some other solutions, the first feeding connection point A1 of the first radio frequency source RF 1 and the second feeding connection point A2 of the second radio frequency source RF 2 may also be asymmetric.
Further, refer to
Further, in this implementation, as shown in
Further, a length L1 of the closed slit is greater than a length L2 of the non-closed slit, for example, a length of the closed slit may be 1 to 2.5 times a length of the non-closed slit, or may be 1.3 to 2 times a length of the non-closed slit.
Further, the length L1 of the closed slit is greater than or equal to ½ times a wavelength of the first antenna or the second antenna and is less than one time the wavelength of the first antenna or the second antenna. As shown in
It can be learned that the antenna system in this implementation can implement two antennas by using an antenna diameter of ½ times a wavelength (namely, the length of the closed slit is equal to ½ times the wavelength of the first antenna or the second antenna) of the antenna. However, a single antenna with a closed slit, like a single antenna with a closed slit shown in
Simulation software is used to perform simulation analysis on the single antenna with the closed slit in a reference design and the antenna system provided in this embodiment, and curve diagrams of effects shown in
Simulation effects of the obtained curve diagrams shown in
As shown in
In
It can be learned from
In
It can be learned from
Refer to
As shown in
The tuning component 16 is configured to adjust the location of the reverse point generated when a current flow passes through each radiator and the ground, so that a current mode generated at locations to which two ends (the grounding end and the feeding end) of the first radio frequency source are connected on the first antenna and a current mode generated at locations to which two ends (the grounding end and the feeding end) of the second radio frequency source are connected on the second antenna can form mode orthogonality. In this way, high isolation is formed between the first antenna and the second antenna.
Further, a connection point A3 formed by connecting the tuning component 16 to the first radiator 11 is located between the first feeding connection point A1 and the second feeding connection point A2.
Further, a grounding point B5 formed by connecting the tuning component 16 to the ground is located between the first feeding grounding point B1 of the first radio frequency source RF 1 and the second feeding grounding point B2 of the second radio frequency source RF 2.
Further, the grounding point B5 formed by connecting the tuning component 16 to the ground is located in a ground area that is on the ground and that is opposite to the gap 10, and the connection point A3 formed by connecting the tuning component 16 to the first radiator 11 is located in a radiator section that is on the first radiator 11 and that is opposite to the gap 10.
It should be noted that: In some implementations, a capacitor C may not be disposed between the second radiator 12 and the third radiator 13, and only the tuning component 16 between the first radiator 11 and the ground is used, for example, an inductor for adjusting a location of the reverse point, and in some other implementations, the tuning component 16 may not be disposed, and only the capacitor C between the second radiator 12 and the third radiator 13 is used to adjust the location of the reverse point, or neither the capacitor C nor the tuning component 16 is disposed.
In addition, in this implementation, a length L1 of the closed slit is 72 mm (as shown in
Simulation software is used to perform simulation analysis on the antenna system provided in this embodiment with closed slits of different lengths, and curve diagrams of effects shown in
Obtained simulation effect parameters of the curve diagrams shown in
It should be noted that “∞” in the table may be understood as that a corresponding component (for example, a capacitor C or an inductor L) is not used or disposed.
Refer to
It can be learned from
It can be learned from
Simulation software is used to perform simulation analysis on an electronic device using an antenna with a closed slit in a reference design and an electronic device using an antenna system with closed slits of different lengths in this embodiment, and SAR value data tables shown in
Obtained simulation effect parameters of the SAR value data tables shown in
In
It can be learned from
It can be learned from
It can be learned from
Therefore, compared with the single antenna with the closed slit, the antenna system in this embodiment can further effectively reduce the SAR value of the antenna.
It can be learned from simulation data in
As shown in
As shown in
The third radiator 13 is in an L shape, and the second radiator 12 includes an L-shaped radiator section 122 and a suspended radiator section 17. The suspended radiator section 17 and the L-shaped radiator section 122 are disposed end-to-end and at spacing. An end of the L-shaped radiator section 122 away from the suspended radiator section 17 is a first end of the second radiator 12, and an end of the suspended radiator section 17 away from the L-shaped radiator section 122 is a second end of the second radiator 12.
The second radiator 12 receives a radio frequency signal through the L-shaped radiator section 122. In other words, the feeding end of the first radio frequency source RF 1 is connected to the L-shaped radiator section 122.
Certainly, a person skilled in the art may understand that, in another alternative implementation, the second radiator 12 may be in an L shape, the third radiator 13 includes the L-shaped radiator section and the suspended radiator section 17, an end of the L-shaped radiator section away from the suspended radiator section 17 is a first end of the third radiator 13, and an end of the suspended radiator section 17 away from the L-shaped radiator section is a second end of the third radiator 13. Correspondingly, the third radiator 13 receives a radio frequency signal through the L-shaped radiator section. In other words, the feeding end of the second radio frequency source RF 2 is connected to the L-shaped radiator section.
Further, the suspended radiator section 17 may be connected to the L-shaped radiator section 122 via a capacitor, for example, a capacitor C1. A form of the capacitor is not limited, and the capacitor may be a distributed coupling capacitor, or may be a lumped capacitor.
As shown in
Refer to
Certainly, a person skilled in the art may understand that, in the second radiator 12 or the third radiator 13, there may be a plurality of suspended radiators. The second radiator 12 is used as an example. When the second radiator 12 includes a plurality of suspended radiator sections, the L-shaped radiator section 122 and the plurality of suspended radiator sections 17 are sequentially disposed end-to-end and at spacing. In this case, an end that is of a last suspended radiator section in the plurality of suspended radiator sections and that is away from the L-shaped radiator section is a second end of the second radiator 12. The feeding end of the first radio frequency source RF 1 may be connected to the L-shaped radiator section 122 or any suspended radiator section 17 in the plurality of suspended radiator sections. Further, each suspended radiator section 17 is connected to an adjacent suspended radiator section via a capacitor, a first suspended radiator section 17 is connected to the L-shaped radiator section via a capacitor, and the last suspended radiator section is connected to a second end of the third radiator 13 via a capacitor C.
A connection relationship in the third radiator is similar to that in the second radiator, and details are not described herein again.
Simulation software is used to perform simulation analysis on the antenna system in this embodiment in a case where there is one suspended radiator section and in a case where there are two suspended radiator sections, and curve diagrams of effects shown in
Obtained simulation effect parameters of the curve diagrams shown in
Refer to
It can be learned from
It can be learned from
Simulation software is used to perform simulation analysis on an electronic device using an antenna system with one suspended radiator section and an electronic device using an antenna system with two suspended radiator sections according to this embodiment, and SAR value data tables shown in
Obtained simulation effect parameters of the SAR value data tables shown in
It can be learned from
It can be learned from
It can be learned that an SAR value of the antenna system in a case where there is one suspended radiator section is lower than that of the antenna system in a case where there are two suspended radiator sections.
Refer to
Both a second radiator 12 and a third radiator 13 are in an L shape, and in a thickness direction of a closed slit (namely, a direction perpendicular to a PCB board 20 in
This application further provides an electronic device, including the antenna system 1 in any one of the foregoing implementations.
Further, as shown in
Simulation software is used to perform simulation analysis on the single antenna with the open slit (namely, the case 1) in a reference design, the dual antenna with the open slit (namely, the case 2) in a reference design, and the antenna system in this embodiment, and curve diagrams of effects shown in
Obtained simulation effect parameters of the curve diagrams shown in
Refer to
It can be learned from
It can be learned from
Simulation software is used to perform simulation analysis on an electronic device using the single antenna with the open slit (namely, the case 1) in a reference design and an electronic device using the antenna system in this embodiment of this application, and SAR value data tables shown in
Obtained simulation effect parameters of the SAR value data tables shown in
It can be learned from
It can be learned from
It can be learned that, compared with the single antenna with the open slit (the case 1), the SAR value of the antenna system in this embodiment is lower.
Simulation software is used to perform simulation analysis on the antenna system in this embodiment of this application, and curve diagrams of effects shown in
Obtained simulation effect parameters of the curve diagrams shown in
Refer to
In
In
Simulation software is used to perform simulation analysis on an electronic device using the antenna system in this embodiment, and SAR value data tables shown in
Obtained simulation effect parameters of the SAR value data tables shown in
It can be learned from
It can be learned from
Therefore, compared with the antenna system in the implementation of this embodiment, the antenna system in the another implementation of this embodiment has a lower SAR value.
Refer to
Both a second radiator 12 and a third radiator 13 are in an L shape, and in a width w direction of a closed slit, a non-closed slit 15 is located on a side that is of a first radiator 11 and that is away from a closed slit 14. Alternatively, it may be understood that, on the basis of the second radiator 12 and the third radiator 13 in the antenna system shown in
This application further provides an electronic device, including the antenna system 1 in any one of the foregoing implementations.
Further, as shown in
Further, refer to
The structure of this embodiment is basically the same as that of the antenna system shown in
This application further provides an electronic device, including the antenna system 1 in any one of the foregoing implementations.
Simulation software is used to perform simulation analysis on the antenna system in this embodiment, and curve diagrams of effects shown in
Obtained simulation effects of the curve diagrams shown in
Refer to
It can be learned from
It can be learned from
Refer to
The antenna system 1 further includes a radiating stub 111 and a radiating stub 112 that are disposed at two ends of a first radiator 11. Both the radiating stub 111 and the radiating stub 112 extend in a direction away from the first radiator 11, and both ends of the radiating stub 111 and the radiating stub 112 that are away from the first radiator 11 are free ends.
A slot is formed between the radiating stub 111 and a PCB board 20 and between the radiating stub 112 and the PCB board 20. Specifically, a slot 18 on a left side of
Further, in this embodiment, both the radiating stub 111 and the radiating stub 112 are in an L shape. Both a horizontal part of the radiating stub 111 and a horizontal part of the radiating stub 112 are located on a same side as the first radiator 11, a vertical part of the radiating stub 111 is located on a first side different from the first radiator 11, and a vertical part of the radiating stub 112 is located on a second side different from the first radiator 11.
Further, refer to
The switch circuit SW 1 includes a switch K1, an inductor LA, and an inductor LB. One end of the switch K1 is connected to the radiating stub 111, and one end of the inductor LA and one end of the inductor LB are connected to the PCB board 20. The switch K1 can be switched between a first location and a second location. When the switch K1 is in the first location, the other end of the switch K1 is connected to the other end of the inductor LA. In this case, the inductor LA is electrically connected between the PCB board 20 and the radiating stub 111, and the switch circuit SW 1 is in a first connection state. When the switch K1 is in the second location, the other end of the switch K1 is connected to the other end of the inductor LB. In this case, the inductor LB is electrically connected between the PCB board 20 and the radiating stub 111, and the switch circuit SW 1 is in a second connection state.
An operating principle of the switch circuit SW 2 is similar to that of the switch circuit SW 1, and may be understood with reference to the foregoing description and
This application further provides an electronic device, including the antenna system 1 in any one of the foregoing implementations.
Simulation software is used to perform simulation analysis on the antenna system of this embodiment when the switch circuit SW 1 and the switch circuit SW 2 are both in the first connection state and in the second connection state, and a curve diagram of an effect shown in
Obtained simulation effect parameters of the curve diagram shown in
Refer to
It can be learned from
It can be further learned from
It should be noted that, in engineering, a value of S11 is generally −6 dB as a standard. When a value of S11 of an antenna is less than −6 dB, it may be considered that the antenna can operate normally, or it may be considered that transmit efficiency of the antenna is good.
In
System efficiency of each antenna in the antenna system shown in
It can be learned that, in a range of 1.85 GHz to 2 GHz, antenna efficiency of the antenna system provided in this embodiment is better than that of the antenna system shown in
Both the radiating stub 111 and the radiating stub extend in a direction parallel to the first radiator 11, and both the radiating stub 111 and the radiating stub 112 are located on a same side as the first radiator 11. In addition, no switch circuit is disposed between the first radiator 11 and the PCB board.
Certainly, a person skilled in the art may understand that, in another alternative implementation, a switch circuit may also be disposed between the first radiator 11 and the PCB board.
In another implementation, one of the radiating stub 111 and the radiating stub 112 is in an L shape, and the other one extends in a direction parallel to the first radiator 11. For the radiating stub in an L shape, a horizontal part of the radiating stub is located on a same side as the first radiator 12, and a vertical part of the radiating stub is located on a side adjacent to the first radiator. The other radiating stub and the first radiator 12 are located on a same side. It should be understood that the solution in
This application further provides an electronic device, including the antenna system 1 in any one of the foregoing implementations.
Simulation software is used to perform simulation analysis on the antenna system in this embodiment, and curve diagrams of effects shown in
Obtained simulation effect parameters of the curve diagrams shown in
Refer to
It can be learned from
In
A second radiator 12 and a third radiator 13 are separately connected to a same radio frequency source RF via a duplexer 23. The second radiator 12 receives, through the duplexer 23, a first radio frequency signal output by the radio frequency source RF, and the third radiator 13 receives, through the duplexer 23, a second radio frequency signal output by the radio frequency source RF. In another alternative implementation, the duplexer 23 may also be a combiner, and does not limit the protection scope of this application herein. It should be understood that the solution in
This application further provides an electronic device, including the antenna system in any one of the foregoing implementations.
Simulation software is used to perform simulation analysis on the antenna system in this embodiment, and curve diagrams of effects shown in
For obtaining the simulation effect parameters of the curve diagrams shown in
It can be learned from
It is clear that a person skilled in the art may make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, this application is intended to cover such modifications and variations to this application, provided that the modifications and variations fall within the scope of the claims of this application and their equivalent technologies.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110919516.6 | Aug 2021 | CN | national |
This application is a National Stage of International Application No. PCT/CN2022/109988, filed on Aug. 3, 2022, which claims priority to Chinese Patent Application No. 202110919516.6, filed on Aug. 11, 2021, both of which are hereby incorporated by reference in their entireties.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/109988 | 8/3/2022 | WO |
