Wideband Bandwidth Beam Circularly Polarized Antenna and Circularly Polarized Method

Abstract

The invention relates to the field of antennas, in particular to a satellite communication and navigation antenna with a broadband beam circularly polarized antenna and a circularly polarized method. The present invention adopts the following technical scheme: the structure includes an antenna layer and a microstrip power divider layer below the antenna layer, the antenna layer includes four integrated curved gradient elements, and the four curved gradient elements are respectively connected to a feed metal The feed metal column is connected to the microstrip power divider circuit on the microstrip power divider layer, and the microstrip power divider layer is a microstrip power divider divided into four. The shape of the four integrally manufactured curved tapered elements is exactly the same, and the feeding metal posts connected to them are distributed perpendicular to the horizontal plane and located in the middle of the antenna as a whole. The present invention adopting the above technical solution has the following beneficial effects: the new antenna has the characteristics of wide operating frequency band, wide lobe width, good circular polarization characteristics, low processing accuracy requirements, and convenient installation. It is very suitable for high-performance satellite navigation ground receiving equipment.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a satellite communication and navigation antenna with a broadband beam circularly polarized antenna and a circularly polarized method. Background technique [0002] The current circularly polarized antennas mainly include microstrip patch, helical antenna, cross oscillator and other structures. [0003] The microstrip patch antenna has a wide beam width and good performance at low elevation angles, but limited by the thickness of the dielectric plate, the bandwidth is limited. Usually, the bandwidth of a single-layer microstrip antenna is only 1-2%. Even if many layers of microstrip plates are stacked, it can be widened Limited bandwidth, up to one octave, but high cost, usually used for wide-beam narrow-band wireless signal transmission. [0004] The beam width of the helical antenna is narrow, the low elevation angle performance is not good, and it occupies a large volume, which is not...

AI Technical Summary

Problems solved by technology

[0007] At present, my country's existing Beidou system satellite positioning and communication antennas usually use several narrow-band microstrip patch antennas or microstrip patch antennas plus cross-over oscillator antennas to achieve multi-point frequency coverage. The system is complex and occupies a large volume. Antennas are integrated together and interfere with each other more, which affects electrical performance and is inconvenient to assemble.

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