A double V-shaped side-mounted FM radio circularly polarized antenna

Abstract

The invention discloses a double V-type side-mounted FM radio circularly polarized antenna, which comprises a radiation module, a feed short-circuit module and an open-circuit capacitance module; the radiation module comprises a first oscillator and a second oscillator which have the same structure. Both oscillators have a certain opening angle, and the opening angles are respectively located on two planes intersecting with an angle, and the end points between the oscillators are connected by a conductor at a certain distance; and the feed short-circuit module comprises a feed short-circuit ring. The beneficial effects of the present invention are as follows: a good impedance matching is obtained by means of stringing an open-circuit capacitor into the matching input of the antenna to broaden the bandwidth of the voltage standing wave ratio of the antenna so that the antenna can be multi-channel multiplexed; meanwhile, the antenna can be arranged in the vertical direction to improve the gain of the antenna system to achieve good coverage.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a double V-shaped side-mounted FM radio circularly polarized antenna. Background technique [0002] In recent years, as the front-end equipment of the wireless communication system, the antenna plays an extremely important role in the communication quality; The application of polarized antennas is more and more extensive; in many systems, it is required to use omnidirectional circularly polarized antennas to achieve full coverage of circularly polarized radio wave signals or to receive incoming waves from any direction and any polarization; in addition, the directivity pattern The omnidirectionality makes it widely used in many fields such as remote sensing and telemetry, communication, radar, electronic reconnaissance and electronic interference, broadcasting and television: in remote sensing and telemetry and aerospace communication equipment, the use of omnidirectional circul...

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Problems solved by technology

[0004] At present, the production of circularly polarized antennas can be roughly divided into three methods; the first method is to achieve circular polarization with complementary oscillators; the second method is to use rotating structures, such as microstrip planar rotating antennas and helical antennas with three-dimensional structures; The third method is to generate crossed dipoles on the radiating patch or dielectric resonator. The mode polarization and phase quadrature of the two crossed dipoles; however, the relative bandwidth of most circularly polarized antennas is generally only 100% It will be difficult to meet the bandwidth requirements of the communication system, and the current circularly polarized antenna has a large inductance component within a certain bandwidth, so there will be difficulties in debugging, the VSWR bandwidth is not wide, and a pair of antennas cannot be many Channel multiplexing application and vertical array coverage of circularly polarized antennas

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