Dual-arm coupling quadrature mode coupler with high cross polarization discrimination
An orthogonal mode coupler and polarization isolation technology, which is applied in the field of satellite communication and achieves the effects of wide application prospects, reduced discontinuity and strong practicability
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[0016] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0017] The orthogonal mode coupler is a four-port device electrically, the common port is connected to the feed horn, and provides two electrical ports, which are respectively assigned to two independent orthogonal modes, and the remaining two ports are transceiver ports, which only transmit their own Schema. The quadrature mode coupler can discriminate the independent signals of 2 quadrature main modes on the common port and supply them to the fundamental mode of a single signal port, so that all ports are matched and have high polarization discrimination ability between the 2 signals. The excitation of high-order modes in the branch area of the common waveguide has adverse effects on isolation and matching, and will eventually affect the radiation pattern of the antenna. Selecting an appropriate common port size and using a symmetrical branc...
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