Circularly polarized antenna-based space diversity coverage receiving and transmitting system

Abstract

The present invention provides a circularly polarized antenna-based space diversity coverage receiving and transmitting system. The system comprises a lower radiating body and an upper radiating body; the lower radiating body covers the whole horizontal direction; the upper radiating body covers an upper half part; and the lower radiating body and the upper radiating body can be disassembled from each other, so that the upper radiation antenna can be replaced according to needs. According to the system of the invention, the lower radiating body antenna has high efficiency and high gain; the lower radiating body antenna has good omnidirectional performance and wide bandwidth; and the upper radiating body antenna can be flexibly designed according to actual needs, so that actual communication needs can be satisfied.

Description

technical field [0001] The present invention relates to a transceiver system, in particular to a transceiver system for realizing space diversity coverage based on a circularly polarized antenna. Background technique [0002] With the advancement of science and technology, for communication systems with special communication requirements, only one omnidirectional circularly polarized antenna with good performance is not enough. For example, for a system that not only needs an omnidirectional antenna for omnidirectional communication on the ground, but also needs to communicate with aircraft or satellites in the sky at the same time, what it needs should be a diversity combination of an omnidirectional antenna and a directional antenna. The working antenna system can realize space diversity communication by switching the communication channel. In order to meet the requirements of the communication system for omnidirectional communication to the ground and communication withi...

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Problems solved by technology

[0003] At present, to achieve spatial coverage, it may not be feasible to use an omnidirectional circularly polarized antenna with better performance, because there is a problem of too low gain, which makes it impossible to use in real life

The article "Acompact and dual-band circularly polarized petal-shaped antenna with broadbeamwidth for multiple global navigation satellite systems" published by Yilong Wang et al. on AdvancedMaterials and Processes for RF and THz Applications (IMWS-AMP) in 2015 realized x-z and y-z The half-power beam width of 170 degrees in the plane, but the maximum gain is only about 0dB, which obviously cannot meet the communication needs in most cases

On the other hand, using discrete antennas placed one high and one low can theoretically achieve omnidirectional coverage under the premise of ensuring the gain, but in fact, the feeder line hanging from the high antenna will inevitably affect the low omnidirectional circularly polarized antenna. Therefore, how to eliminate this effect and achieve higher gain omnidirectional circular polarization coverage is a difficult point

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