Broadband C band circularly polarized four-port feed source network

Abstract

The invention discloses a broadband C band circularly polarized four-port feed source network, belonging to the technical field of satellite communication. The broadband C band circularly polarized four-port feed source network comprises a broadband circular polarizer, a circular-square transition waveguide, a broadband orthogonal mode coupler, a straight waveguide and two frequency duplexers; thebroadband circular polarizer comprises a square waveguide and four ladder-like ridge pieces arranged on four inner walls of the square waveguide, each inner wall is provided with one ladder-like ridge piece, two para-position ladder-like ridge pieces have the same specification and opposite to each other, two neighboring ladder-like ridge pieces have different length and different height. The broadband C band circularly polarized four-port feed source network provided by the invention is simple in structure, can cover full spectrum band of the C band, widens the current C band communication 500MHz and 800MHz circularly polarized four-port feed source networks to be 1.2GHz. The broadband C band circularly polarized four-port feed source network has the characteristics of being free from debugging, easy to assemble, highly reliable and suitable for batch production.

Description

technical field [0001] The invention discloses a broadband C-band circularly polarized four-port feed source network, which relates to the technical field of satellite communication C-band fixed station and mobile station antennas, and is suitable for a feed source network system for C-band transceivers sharing circularly polarized antennas. Background technique [0002] Satellite communication has many advantages such as wide coverage, large communication capacity, good transmission quality, convenient and fast networking, and easy realization of global seamless links. It is considered to be an essential means of establishing global personal communication. [0003] One of the bottlenecks in the development of satellite communications lies in the limited spectrum resources. At present, in the C-band, most commercial fixed-satellite services use 500MHz (receiving: 3.7GHz-4.2GHz; transmitting: 5.925GHz-6.425GHz); or 800MHz (receiving: 3.4GHz-4.2GHz; : 5.85GHz~6.65GHz). With ...

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Problems solved by technology

[0005] The traditional C-band satellite communication antenna frequency multiplexing circular polarization four-port feed network adopts frequency division first, then polarization division, and then converts to circular polarization in the high frequency and low frequency bands respectively. Both the conical waveguide four-wall The split-wave form of coupling is composed of a wave splitter, a deployment waveguide, a high-frequency circular polarizer, a low-frequency circular polarizer, a transmission-resistance filter, and a reception-resistance filter. It contains many microwave devices and has a complex structure. The difficulty and workload of debugging are relatively large, and the wide-band circular polarization application of C-band transceiver with 1.2GHz each can not be realized

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