Patent Application
20240063543
This application claims the benefit of priority to Taiwan Patent Application No. 111131016, filed on Aug. 17, 2022. The entire content of the above identified application is incorporated herein by reference.
The present disclosure relates to antenna technology field, and more particularly, to an open loop antenna and an electronic device having the open loop antenna.
With the rapid development of wireless communication technology, mobile communication devices like notebook computers, tablet computers, and cellular phones are trending toward thin-and-light. Under the miniaturization trend, hardware space in the mobile communication device is severely compressed, and so the space allocated for antenna is also relatively limited. Many electronic modules and electric components are arranged in close proximity to the antenna, thereby causing interference which affects antenna characteristics and radiation efficiency.
From this, how to arrange antenna inside limited space of mobile communication device housing while maintaining high radiation efficiency and reducing noise interference from surrounding electronic modules and electric components is a goal in the related industry.
It is an aspect of the present disclosure to provide an open loop antenna that includes a base, a first radiating section, a second radiating section, and a grounding section. The first radiating section is disposed on one side of the base and includes a feeding segment, an extending segment, and a high-frequency coupling segment. One end of the feeing segment is connected to a feeding point. The extending segment is connected to another end of the feeding segment and generates a first frequency band when being excited. The high-frequency coupling segment is connected to the extending segment and generates a second frequency band when being excited. The second radiating section is disposed on the base and spaced apart from the first radiating section to form an open loop. The second radiating section is coupled with the first radiating section to generate a third frequency band. The first frequency band is higher than the second frequency band, and the second frequency band is higher than the third frequency band. The grounding section is disposed on the base and spaced apart from the first radiating section. The grounding section is connected to the second radiating section and a ground voltage.
It is another aspect of the present disclosure to provide an electronic device that includes a housing, an open loop antenna, and at least one electronic module. The open loop antenna is disposed in the housing and includes a base, a first radiating section, a second radiating section, a grounding section, a coaxial cable, and a shielding member. The base has at least one surface. The first radiating section is disposed on one side of the base and includes a feeding segment, an extending segment, and a high-frequency coupling segment. One end of the feeding segment is connected to a feeding point. The extending segment is connected to another end of the feeding segment and generates a first frequency band when being excited. The high-frequency coupling segment is connected to the extending segment and generates a second frequency band when being excited. The second radiating section is disposed on the side of the base and spaced apart from the first radiating section to form an open loop. The second radiating section is coupled with the first radiating section to generate a third frequency band. The first frequency band is higher than the second frequency band, and the second frequency band is higher than the third frequency band. The grounding section is disposed on the side of the base and spaced apart from the first radiating section. The grounding section is connected to the second radiating section and a ground voltage. The coaxial cable is disposed on the base and includes a central conductive line and a conductive housing. The central conductive line is coupled to the feeding point, and the conductive housing is coupled to a grounding point of the ground voltage. The shielding member is coupled to the ground voltage and covers the at least one surface of the base. The shielding member surrounds the first radiating section and the second radiating section to provide electromagnetic shielding for the first radiating section and the second radiating section. The at least one electronic module is disposed in the housing and around the open loop antenna.
The present disclosure can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows:
The present disclosure is more particularly described in the following examples that are intended as illustrative only since numerous modifications and variations therein will be apparent to those skilled in the art. Like numbers in the drawings indicate like components throughout the views. As used in the description herein and throughout the claims that follow, unless the context clearly dictates otherwise, the meaning of “a”, “an”, and “the” includes plural reference, and the meaning of “in” includes “in” and “on”. Titles or subtitles can be used herein for the convenience of a reader, which shall have no influence on the scope of the present disclosure.
The terms used herein generally have their ordinary meanings in the art. In the case of conflict, the present document, including any definitions given herein, will prevail. The same thing can be expressed in more than one way. Alternative language and synonyms can be used for any term(s) discussed herein, and no special significance is to be placed upon whether a term is elaborated or discussed herein. A recital of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification including examples of any terms is illustrative only, and in no way limits the scope and meaning of the present disclosure or of any exemplified term. Likewise, the present disclosure is not limited to various embodiments given herein. Numbering terms, such as “first”, “second” or “third” can be used to describe various components, signals or the like, which are for distinguishing one component/signal from another one only, and are not intended to, nor should be construed to impose any substantive limitations on the components, signals or the like.
In the present disclosure, when an element (i.e., a unit or a module) is described to “connect” to another element, it means to that the element is directly connected to the other element, or that certain element is indirectly connected to the other element, which implies that there is another element between the element and the other element. When an element is described to “directly connect” to another element, it means to no other element is between the element and the other element.
Referring to
Referring to
The first radiating section 210 includes a feeding segment 211, an extending segment 212, and a high-frequency coupling segment 213. One end of the feeding segment 211 is connected to a feeding point F′ that can be coupled to a signal source S like a radio frequency (RF) module, and the signal source S is used to excite the open loop antenna 200. The extending segment 212 is connected to the other end of the feeding segment 211 and generates a first frequency band when being excited. The high-frequency coupling segment 213 is connected to the extending segment 212 and generates a second frequency band when being excited. The second radiating section 220 and the first radiating section 210 are spaced apart and form an open loop. The second radiating section 220 is coupled with the first radiating section 210 to generate a third frequency band. The first frequency band is higher than the second frequency band, and the second frequency band is higher than the third frequency band. The grounding section 230 and the first radiating section 210 are spaced apart, and the grounding section 230 is connected to the second radiating section 220 and coupled to a ground voltage VSS′.
The difference between the first embodiment and the second embodiment is that the base 201 of the second embodiment as a whole is an irregular three dimensional structure with a plurality of surfaces. The open loop antenna 200 further includes a shielding member 240, and the shielding member 240 is a metal frame (as shown in
Moreover, the open loop antenna 200 further includes a coaxial cable 250. The coaxial cable 250 is disposed in an accommodating slot (unlabeled) of the base 201 and includes a central conductive line 251 and a conductive housing 252. The central conductive line 251 is coupled to the feeding point F′, and the conductive housing 252 is coupled to a grounding point GP of the ground voltage VSS′. In specific, a positive electrode of the signal source S can be coupled to the central conductive line 251 and a negative electrode of the signal source S can be coupled to the conductive housing 252 to excite the open loop antenna 200. The structural details of the first radiating section 210 and the second radiating section 220 are described below.
Referring to
The feeding segment 211 is disposed on the first surface 2011 and includes a first feeding subsection 2111 and a second feeding subsection 2112. The first feeding subsection 2111 is configured to extend from the feeding point F′ along a first direction (positive X direction). The second feeding subsection 2112 is configured to extend from the first feeding subsection 2111 along a second direction (positive Y direction), and the second direction is perpendicular to the first direction, such that the first feeding subsection 2111 and the second feeding subsection 2112 form a L shape. The extending segment 212 is of a rectangular shape and is configured to extend toward the second radiating section 220 on the second surface 2012.
The high-frequency coupling segment 213 includes a first high-frequency coupling subsection 2131, a second high-frequency coupling subsection 2132, and a third high-frequency coupling subsection 2133. The first high-frequency coupling subsection 2131 is configured to extend from the second connecting segment 215, which is connected to the extending segment 212, along the second direction on the third surface 2013. The second high-frequency coupling subsection 2132 is configured to extend from the first high-frequency coupling subsection 2131 along a third direction (negative X direction) on the third surface 2013, and the third direction is opposite the first direction. The third high-frequency coupling subsection 2133 is configured to extend from the second high-frequency coupling subsection 2132 along a fourth direction (negative Y direction), and the fourth direction is opposite the second direction. In addition, the third high-frequency coupling subsection 2133 includes three segments (unlabeled) respectively disposed on the third surface 2013, the fifth surface 2015, and the second surface 2012. On the third surface 2013, the first high-frequency coupling subsection 2131, the second high-frequency coupling subsection 2132, and one of the three segments of the third high-frequency coupling subsection 2133 are connected to form a U shape.
The second radiating section 220 includes a low-frequency coupling segment 221 and a grounding segment 222. The low-frequency coupling segment 221 is configured to be spaced apart from the high-frequency coupling segment 213 along the third direction. The grounding segment 222 is configured to extend from the low-frequency coupling segment 221 along the fourth direction. In particular, the low-frequency coupling segment 221 includes a first low-frequency coupling subsection 2211, a second low-frequency coupling subsection 2212, and a third low-frequency coupling subsection 2213. The first low-frequency coupling subsection 2211 is configured to be spaced apart from the third high-frequency coupling subsection 2133 of the high-frequency coupling segment 213 along the third direction. In addition, the first low-frequency coupling subsection 2211 includes three segments (unlabeled) respectively disposed on the second surface 2012, the fifth surface 2015, and the third surface 2013. The three segments of the first low-frequency coupling subsection 2211 are respectively parallel to the three segments of the third high-frequency coupling subsection 2133. The second low-frequency coupling subsection 2212 is configured to extend from the first low-frequency coupling subsection 2211 along the third direction on the third surface 2013. The third low-frequency coupling subsection 2213 is disposed on the third surface 2013 and configured to extend from the second low-frequency coupling subsection 2212 along the fourth direction. On the third surface 2013, one of the segments of the first low-frequency coupling subsection 2211, the second low-frequency coupling subsection 2212, and the third low-frequency coupling subsection 2213 are connected to form another U shape.
As shown in
The operating frequency band and size of the open loop antenna 200 according to the second embodiment is described below. The first frequency band is between 5925 MHz and 7125 MHz. The second frequency band is between 5150 MHz and 5850 MHz. The third frequency band is between 2400 MHz and 2500 MHz. Hence, the open loop antenna 200 supports the operating frequency bands required by WIFI 6E standard. The first radiating section 210 has a length L1 that is one quarter of a wavelength (λ/4) of the second frequency band. By configuring the length L1 of the first radiating section 210, the present disclosure is able to adjust the offset of the open loop antenna 200 operating in high frequency band (i.e., the first frequency band and the second frequency band). It is to be noted that a coupling gap CG is formed between the first radiating section 210 and the second radiating section 220, and the coupling gap CG is between 0.3 mm to 1 mm. The present disclosure is able to adjust the matching of the open loop antenna 200 operating in the third frequency band through arranging the coupling gap CG, and the coupling gap CG is preferably 0.5 mm. Furthermore, the first radiating section 210, the coupling gap CG, and the second radiating section 220 have a total length L2, and the total length L2 is one half of a wavelength (λ/2) of the third frequency band. The present disclosure is not limited thereby.
Referring to
Referring to
Referring to
In view of the above, the present disclosure has the following advantages. First, through the arrangement among the first radiating section, the second radiating section, and the grounding section, not only is the open loop antenna of the present disclosure miniaturized in size, but also supports the broadband operation in WLAN and WIFI 6E. Second, the open loop antenna of the present disclosure uses the shielding member to isolate the electromagnetic waves generated by nearby electronic modules and electric components, so that the first radiating section and the second radiating section are not interfered by noise interference, thereby enhancing stability and radiation frequency of the open loop antenna. Third, when the open loop antenna of the present disclosure operates in low frequency band, the antenna radiation efficiency is as high as 40%.
The foregoing description of the exemplary embodiments of the disclosure has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching.
The embodiments were chosen and described in order to explain the principles of the disclosure and their practical application so as to enable others skilled in the art to utilize the disclosure and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the present disclosure pertains without departing from its spirit and scope.
| Number | Date | Country | Kind |
|---|---|---|---|
| 111131016 | Aug 2022 | TW | national |
