Plate antenna with polarization adjustment

Abstract

The invention discloses a plate antenna with polarization adjustment, which belongs to the field of satellite communication. The plate antenna with polarization adjustment comprises a polarization adjusting device connected between an antenna radiation system and a back-end RF circuit, wherein the polarization adjusting device comprises a polarization synthesizer, a waveguide tube and a depolarization device, the polarization synthesizer and the depolarization device are each provided with two paths of polarization connecting ports and a public port, the waveguide tube is connected between the public port of the polarization synthesizer and the public port of the depolarization device, and the depolarization device can rotate around an axis of the waveguide tube; the antenna radiation system comprises two paths of polarization signal transmission channels, the two paths of polarization connecting ports of the polarization synthesizer are respectively connected with the two paths of polarization signal transmission channels; and at least one of the two paths of polarization connecting ports of the depolarization device is connected with the back-end RF circuit. Through structure adjustment, the plate antenna only adopts a very few microwave passive components, achieves polarization adjustment, and expands the application range.

Description

technical field [0001] The invention relates to a flat-panel antenna, specifically a flat-panel antenna capable of automatically adjusting polarization, and belongs to the field of satellite communication. Background technique [0002] Satellite communication has the advantages of long transmission distance, wide coverage, and low interference. With the rapid development of global informatization, more and more information is transmitted through satellites, and communication with satellites on mobile carriers anytime, anywhere has become a military-civilian There is an urgent need for dual-purpose emergency communication and real-time communication. [0003] The vehicle-mounted (ship-borne or airborne) satellite mobile communication system is usually called "Mobile Communication". One of the core technologies of Mobile Communication is antenna technology. The antenna forms of Mobile Communication include reflector antenna, panel antenna and phase control antenna. array ante...

AI Technical Summary

Problems solved by technology

Usually live TV satellites and communication broadcasting satellites work in the dual-polarization or dual-circular polarization state, but most of the current flat-panel array antennas work in the single-linear polarization or single-circular polarization state. Antenna structure or using two antennas to send and receive two polarized signals respectively. These two methods are either complex in structure and cannot achieve dual polarization compatibility at the same time, or the antenna manufacturing cost is high and the equivalent surface efficiency is low.

[0005] The article "Automatic Polarization Adjustment Technology for Satellite Communication Antenna" published by Liu Ying et al. in Radio Engineering No. 7, 2012 introduced a circuit that uses attenuators, phase shifters, etc. to achieve automatic polarization by controlling the ratio of orthogonal linear polarization amplitudes. Adjustment, but due to the insertion loss of components and other reasons, this technology makes automatic polarization adjustment not suitable for the emission state

[0006] On October 29, 2014, Chinese invention patent CN103022691B disclosed a new type of "communication in motion" low-profile flat-panel antenna system, including antenna radiation system, radio frequency polarization system, antenna terminal mechanical drive system, satellite pointing, acquisition, and tracking System and indoor unit, which realize dual-frequency, dual-polarization, and duplex working modes, but the receiving polarizer adopts electronic polarization, which still cannot be shared with the transmitting polarizer

[0007] In addition, Raysat's E7000 mobile communication antenna adopts a mechanical polarization adjustment method, which can realize duplex transmission and reception, but it is only suitable for single-polarization working conditions

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