This application claims the priority benefit of Taiwan application serial no. 111139504, filed on Oct. 18, 2022. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
This disclosure relates to an antenna device, and in particular to an antenna device providing better reception.
The 4G/5G/Wi-Fi router is now a must-have communication network device in the home. Users will adjust the angle of the external antenna of the router to avoid dead spots in the reception, so as to achieve wide coverage and reception quality. However, when users adjust the angle of the external antenna, the reception quality will be better in some spaces and worse in others. The reason is that the traditional external antenna is designed with only one set of antennas to produce one set of radiation pattern, which is physically limited by the fact that the angle of a certain radiation pattern is concave, resulting in dead spots in the reception.
The disclosure provides an antenna device that provides better reception.
The antenna device of the disclosure includes a body and at least one external antenna. The body includes a processor and a sensor electrically connected to the processor, and the processor is configured to receive a sensing signal from the sensor. The external antenna is externally connected to the body at an adjustable angle, and includes a first antenna, a second antenna, and a switch. The switch is electrically connected to the processor, and is switchably electrically connected to the first antenna and the second antenna. The first antenna has a first radiation pattern, and the second antenna has a second radiation pattern. When the sensor senses that the external antenna is at a first angle relative to the body, the processor switches the switch electrically connected to the first antenna according to the sensing signal, so that the external antenna has the first radiation pattern. When the sensor senses that the external antenna is at a second angle relative to the body, the processor switches the switch electrically connected to the second antenna according to the sensing signal, so that the external antenna has the second radiation pattern.
Based on the above, the external antenna of the antenna device of the disclosure may be externally connected to the body at an adjustable angle. The body includes a processor and a sensor electrically connected to the processor, and the processor is configured to receive a sensing signal from the sensor. The external antenna includes a first antenna, a second antenna, and a switch, and the switch is electrically connected to the processor and is switchably electrically connected to the first antenna and the second antenna. The first antenna has a first radiation pattern, and the second antenna has a second radiation pattern. When the sensor senses that the external antenna is at a first angle relative to the body, the processor switches the switch electrically connected to the first antenna according to the sensing signal, so that the external antenna has the first radiation pattern. When the sensor senses that the external antenna is at a second angle relative to the body, the processor switches the switch electrically connected to the second antenna according to the sensing signal, so that the external antenna has the second radiation pattern. Since the external antenna of the antenna device of the disclosure can be switched to different antennas according to the position relative to the body so as to provide different radiation patterns, the probability of dead spots in the reception may be effectively reduced and a better reception effect may be provided.
To make the aforementioned more comprehensive, several embodiments accompanied with drawings are described in detail as follows.
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure.
In this embodiment, the body 110 of the antenna device 100 is optionally installed on a ceiling (not shown), and a bottom surface 112 of the body 110 is, for example, parallel to the ceiling. It can be seen from
As shown in
In addition, in
Referring to
In this embodiment, the sensor 122 is a capacitive proximity sensor 122. The body 110 also includes at least one sensing pad 124 near the at least one external antenna 130. Each sensing pad 124 is electrically connected to the proximity sensor 122. The sensing pad 124 and the sensor 122 (the capacitive proximity sensor) are configured to obtain a capacitive signal of the external antenna 130. In this embodiment, a number of the sensing pad 124 is two, and the two sensing pads 124 correspond to the two external antennas 130 respectively to sense an angle of placement of the external antenna 130 relative to the body 110. It should be noted that the first angle θ1 is not limited to 90 degrees, as long as the angle of placement of the external antenna 130 is sensed by the sensing pad 124, it is within the scope to be protected by the disclosure.
Specifically, as shown in
As shown in
In this embodiment, the first antenna 140 is, for example, a dipole antenna, and the second antenna 150 is, for example, a slot antenna. Of course, the types of the first antenna 140 and the second antenna 150 are not limited to the above. In other embodiments, the first antenna 140 and the second antenna 150 may be two of a PIFA antenna, a slot antenna, a patch antenna, a dipole antenna, and a monopole antenna.
In this embodiment, the first antenna 140 and the second antenna 150 are of different types, but excite the same frequency band. This frequency band is, for example, between 3.3 GHz and 3.8 GHz, but the frequency band is not limited thereto.
The switch 160 is switchably electrically connected to the first antenna 140 and the second antenna 150. In this embodiment, the switch 160 includes a first port 161, a second port 162, and a third port 163. The first port 161 is electrically connected to a signal source 170, the second port 162 is electrically connected to the first antenna 140, and the second port 162 is electrically connected to the second antenna 150 to optionally feed the signal to the first antenna 140 or the second antenna 150. In addition, the processor 120 of the body 110 is electrically connected to the switch 160, and thus, the processor 120 may instruct the switch 160 to switch to the first antenna 140 or the second antenna 150 according to the angle of placement of the external antenna 130 relative to the body 110, so that the first antenna 140 or the second antenna 150 generates the first radiation pattern or the second radiation pattern respectively.
Specifically, when the external antenna 130 is at the first angle θ1 relative to the body 110 (as shown in
Since the types of the first antenna 140 and the second antenna 150 are different, and the first radiation pattern of the first antenna is different from the second radiation pattern of the second antenna, the processor 120 may whether to switch to the first antenna 140 or the second antenna 150 depending on the angle of the external antenna 130 relative to the body 110, in order to provide an appropriate radiation pattern for the external antenna 130 at the angle, thereby reducing the probability of the dead spots in the reception.
More specifically, if the antenna device 100 is installed on the ceiling, the main receiving location will be below the antenna device 100. The designer uses the antenna with a good radiation pattern below the body 110 as the first antenna 140 when the external antenna 130 is at the first angle θ1 relative to the body 110, and uses the antenna with a good radiation pattern below the body 110 as the second antenna 150 when the external antenna 130 is at the second angle θ2 relative to the body 110, so as to ensure that there is a good reception effect below the body 110, and that there can be a good reception effect for different locations through different antennas.
In this embodiment, the first antenna 140 includes a first radiator 141, a second radiator 145, and a first ground plane 146. The first ground plane 146 includes an edge 147 and a notch 148 recessed in the edge 147. The first radiator 141 includes a first section 142 and a second section 144, and the first section 142 is located in the notch 148 and includes a first feed-in end 143. The first feed-in end 143 is electrically connected to the second port 162 of the switch 160. The second radiator 145 is connected to the edge 147 of the first ground plane 146, and an angle θ3 between the second section 144 and the second radiator 145 is between 30 degrees and 60 degrees, for example, 45 degrees. That is, the first antenna 140 is a 45-degree open-angle dipole antenna.
In addition, the second antenna 150 includes a third radiator 151 and a second ground plane 153 that are not coplanar, the third radiator 151 being disposed, for example, on an upper surface of the substrate 132 and the second ground plane 153 being disposed, for example, on a lower surface of the substrate 132. The second ground plane 153 includes an internal hole 154, the third radiator 151 includes a second feed-in end 152, and the second feed-in end 152 is electrically connected to the third port 163 of the switch 160. Projection of the third radiator 151 onto a plane of the second ground plane 153 spans from the second ground plane 153 to the internal hole 154. Of course, the pattern of the first antenna 140 and the second antenna 150 are not limited thereto.
When the external antenna 130 is at the second angle θ2 relative to the body 110, for example, the second angle θ2 is 180 degrees, the switch 160 switches to the second antenna 150, and with an input impedance bandwidth based on a standard of a VSWR of 2:1 or a return loss of −10 dB, the second antenna 150 has a good performance at the operating frequency of the impedance bandwidth covering the required bandwidth for the communication frequency band of the 5G n78 system (3300 to 3800 MHz). In addition, after measurement, the second antenna 150 has an antenna efficiency of 78% at the center frequency of 3550 MHz in the 5G n78 system communication frequency band (3300 to 3800 MHz), which has a good performance.
In other words, no matter the angle of the external antenna 130 is adjusted to the first angle θ1 or the second angle θ2, the switch 160 switches to the first antenna 140 or the second antenna 150 to provide a proper radiation pattern and good communication quality. In addition, as can be seen from
To sum up, the external antenna of the antenna device of the disclosure may be externally connected to the body at an adjustable angle. The body includes a processor and a sensor electrically connected to the processor, and the processor is configured to receive a sensing signal from the sensor. The external antenna includes a first antenna, a second antenna, and a switch, and the switch is switchably electrically connected to the first antenna and the second antenna. The first antenna has a first radiation pattern, and the second antenna has a second radiation pattern. When the sensor senses that the external antenna is at a first angle relative to the body, the processor switches the switch electrically connected to the first antenna according to the sensing signal, so that the external antenna has the first radiation pattern. When the sensor senses that the external antenna is at a second angle relative to the body, the processor switches the switch electrically connected to the second antenna according to the sensing signal, so that the external antenna has the second radiation pattern. Since the external antenna of the antenna device of the disclosure switches to different antennas with the position relative to the body to provide different radiation patterns, the probability of dead spots in the reception may be effectively reduced and a better reception effect may be provided.
It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments without departing from the scope or spirit of the disclosure. In view of the forthcoming, it is intended that the disclosure covers modifications and variations provided that they fall within the scope of the following claims and their equivalents.
Number | Date | Country | Kind |
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111139504 | Oct 2022 | TW | national |