Ultrathin high-gain circularly polarized antenna
A circularly polarized antenna, high-gain technology, applied in the field of ultra-thin high-gain circularly polarized antennas, can solve the problems of low anti-interference ability, low gain, large volume, etc., and achieve improved anti-interference ability and high gain , The effect of simplifying the processing technology
Active Publication Date: 2016-09-28
佛山市安特纳通讯设备有限公司
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Problems solved by technology
[0002] With the rapid development of the Internet of Things industry, it is required that the volume of the antenna should be small, the gain should be high, and the anti-interference ability should be strong. This is the purpose of the research and development of the four-element circularly polarized antenna. Thin, high gain, strong anti-interference ability, which is difficult to achieve with other antennas
[0003] Due to its technical reasons, the general circularly polarized antenna has low gain, high profile, and large volume, especially the uneven axial ratio (in the frequency band, only the center frequency obtains a lower axial ratio, while the high-end and low-end frequencies Axial ratio is high) resulting in low anti-interference ability
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[0026] In order to facilitate those skilled in the art to better understand the essence of the present invention, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0027] Such as Figure 1-Figure 3 As shown, an ultra-thin high-gain circularly polarized antenna works in the frequency range of 902-928MHz, including: oscillator reflectors 1-6, four circularly polarized metal oscillators installed on the oscillator reflectors 1-6 1-1 and an antenna cover, the circularly polarized metal vibrator 1-1 is circular, and each circularly polarized metal vibrator 1-1 is at a certain height from the vibrator reflector 1-6, and the circularly polarized metal vibrator 1-1 There is a single feed point 1-3 on the circular surface of -1, the center of the circularly polarized metal vibrator 1-1 is grounded, and the feed points 1-3 are connected together through the feed network 1-4 and then reflected b...
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The invention discloses an ultrathin high-gain circularly polarized antenna comprising an oscillator reflecting plate, four circularly polarized metal oscillators which are installed on the oscillator reflecting plate, and an antenna cover. The circularly polarized metal oscillators are circular. Each circularly polarized metal oscillator is away from the oscillator reflecting plate for a certain height. A single feed point is arranged on the circular surface of each circularly polarized metal oscillator. The center of each circularly polarized metal oscillator is grounded. All the feed points are connected through a feed network and then connected with an output cable connector arranged on the oscillator reflecting plate. Each circularly polarized metal oscillator is elaborately designed and precisely processed, and the size of the feed network is strict so that the circularly polarized antenna is ensured to achieve the advantages that the gain is high and the axial ratio is low, consistency of vertical and horizontal beam width can be realized and the anti-interference capability of the circularly polarized antenna can be enhanced. The ultrathin high-gain circularly polarized antenna also has the advantages of simple structure, product consistency and convenient installation.
Description
technical field [0001] The invention relates to the field of RFID radio frequency card reading antennas, in particular to an ultra-thin high-gain circularly polarized antenna. Background technique [0002] With the rapid development of the Internet of Things industry, it is required that the volume of the antenna should be small, the gain should be high, and the anti-interference ability should be strong. This is the purpose of the research and development of the four-element circularly polarized antenna. Thin, high gain, strong anti-interference ability, which is difficult to achieve with other antennas. [0003] Due to its technical reasons, the general circularly polarized antenna has low gain, high profile, and large volume, especially the uneven axial ratio (in the frequency band, only the center frequency obtains a lower axial ratio, while the high-end and low-end frequencies Axial ratios are high) resulting in low anti-interference ability. Contents of the inventio...
Claims
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IPC IPC(8): H01Q1/36H01Q1/38H01Q1/48
CPCH01Q1/36H01Q1/38H01Q1/48
Inventor 吴胜添李金平
Owner 佛山市安特纳通讯设备有限公司