A ku-band high-power low-pim broadband polarization frequency duplex feed component

Abstract

The invention discloses a high-power low-PIM (passive intermodulation) broadband polarized frequency duplexing feed assembly in a Ku frequency band, comprising a symmetrical two-arm orthogonal modal coupler and two frequency duplexers, wherein the symmetrical two-arm orthogonal modal coupler comprises an inner structure and a shell; the inner structure comprises a public square waveguide, a symmetrical two-arm coupling access and a longitudinal straight access, thus forming a public port, a symmetrical two-arm synthetic port and a longitudinal straight port; two side faces of the public square waveguide are provided with two rectangle coupling windows with the same size symmetrically; an inductive column which is parallel to and has the same length with a long edge of the rectangle coupling window is inserted into the middle point of a short edge of each rectangle coupling window; and a shaping diaphragm which is vertically connected with the rectangle coupling windows at two sides is inserted into the center in the public square waveguide. According to the assembly, the symmetrical two-arm orthogonal modal coupler is connected to the two frequency duplexers to finish the polar duplex and the frequency duplex of signals, thus solving the two traditional technical problems of the polar duplex and the frequency duplex of an antenna system at the Ku frequency band. The special shaping curve diaphragms and the inductive columns are utilized in the symmetrical two-arm orthogonal modal coupler, thus realizing the broadband matching and avoiding the asymmetrical higher order modes. The assembly has the advantage of compact structure.

Description

technical field [0001] The present invention relates to a dual-wire polarized transceiver shared antenna feed, in particular to a Ku-band high-power (common port combined power up to 1840W) low PIM (required at the port where the feed assembly is connected to the input end of the transponder, The invention relates to a 7th-order PIM product under high and low temperature conditions (less than -193dBc) broadband polarization frequency duplex feed assembly, which belongs to the technical field of new space-borne antenna feed systems. Background technique [0002] The satellite payload antenna subsystem can realize the receiving and transmitting functions of electromagnetic signals. The traditional antenna subsystem design adopts the scheme of separating the transmitting and receiving antennas, that is, one receiving antenna and one transmitting antenna. The source component technology is easy to implement, without considering the broadband matching problem, and can obtain high...

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Problems solved by technology

[0005] The design difficulty in the dual-polarized transceiver shared antenna feed component is the orthogonal mode coupler component. The transmission of each polarization signal covers the receiving and transmitting frequency bands, so the wideband matching of the signal, high-order mode suppression and port isolation The degree of accuracy

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