A Broadband Sector Circularly Polarized Antenna
A circularly polarized antenna, sector-shaped technology, applied in the microwave field, can solve the problem that it is difficult to meet the bandwidth requirements of the communication system, and the circularly polarized antenna is only a few percent, and achieve good circularly polarized performance, simple structure, large The effect of operating bandwidth
Active Publication Date: 2018-07-20
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
However, the relative bandwidth of most circularly polarized antennas is generally only a few percent
It will be difficult to meet the bandwidth requirements of the communication system
Method used
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[0022] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0023] Such as figure 1 , figure 2 , image 3 As shown, the present invention discloses a broadband sector circularly polarized antenna, which includes a radiation module, a coaxial connector and a parasitic module;
[0024] The radiation module is fan-shaped, and the central axis of the radiation module is perpendicular to the large ground;
[0025] The inner conductor of the coaxial joint is connected to the center of the circle corresponding to the radiation module, and the outer conductor is connected to the large ground;
[0026] The parasitic module includes a distributed capacitance unit with capacitance and a distributed inductance unit with inductance, the distributed capacitance unit is connected to the large ground, and the distributed inductance unit is connected to the radiation module and the large ground;
[0027] The distribute...
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The invention discloses a broadband fan-shaped circularly polarized antenna including a radiation module, a coaxial joint and a parasitic module. The radiation module is fan-shaped and the central axis of the radiation module is perpendicular to the ground. An inner conductor of the coaxial joint is connected with the center of the radiation module while an outer conductor of the coaxial joint is connected with the ground. The parasitic module comprises a distributive capacitor unit having capacitance effect and a distributive inductor unit having inductance effect. The distributive capacitor unit is connected with the ground. The distributive inductor unit is connected with the radiation module and the ground. The distributive capacitor unit and the distributive inductor unit are arranged on two sides of the coaxial joint, so that the horizontal polarization current component of the radiation module is equal to the vertical polarization current component and the time phase difference between the horizontal polarization current component and the vertical polarization current component is 90 degrees. The antenna provided by the invention has an effect of broadband circular polarization and has characteristics of simple structure, low profile, small size, low manufacture cost and the like and the application range is very wide.
Description
technical field [0001] The invention relates to the field of microwave technology, in particular to a broadband sector circularly polarized antenna. Background technique [0002] The practical significance of circularly polarized antennas is mainly reflected in: 1. Circularly polarized antennas can receive incoming waves of any polarization and their radiated waves can also be received by any polarized antenna, so circularly polarized antennas are generally used in electronic reconnaissance and jamming ; 2. The rotation orthogonality of circularly polarized antennas is widely used in applications such as communication, radar polarization diversity, and electronic countermeasures; 3. When circularly polarized waves are incident on symmetrical targets (such as planes, spherical surfaces, etc.) The direction is reversed, so circularly polarized antennas can suppress rain and fog interference and anti-multipath reflection when used in mobile communications, GPS, etc. [0003] A...
Claims
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IPC IPC(8): H01Q1/36H01Q15/24
CPCH01Q1/36H01Q15/24
Inventor 吕文俊袁成莹高琛朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM