Four-band multi-polarization co-aperture feed source

Abstract

The invention relates to a four-band multi-polarization co-aperture feed source. The four-band multi-polarization co-aperture feed source is formed by combining a double linear polarization antenna of a Ku band and a double circular polarization antenna of a Ka band and comprises a conical horn, a Ku circular waveguide, a tuning screw, a Ku flange, a horizontal polarization power divider, a first flange, a vertical polarization power divider, a medium rod, a circular waveguide feed window, a stop screw, a transition section and a double circular polarization antenna. The antenna of the Ku band uses four ports for symmetrical feeding to improve the symmetrical characteristic of a directional diagram, a transmission waveguide of an electromagnetic field of the Ku band is used as the transition section of the electromagnetic field of the Ka band, and the resonance medium rod is embedded into the waveguide of the Ku band for transmitting electromagnetic waves of the Ka band so that compactness of the antenna is greatly improved. By means of dielectric waveguides and conical horn nesting technologies, the purposes of achieving antenna beam conformity and sharing one phase center are achieved, uniformities of directional diagrams and uniformities of the phase centers in four working bands are guaranteed, isolation among bands is increased, and the compactness of the antenna is improved.

Description

technical field [0001] The invention relates to a four-frequency multi-polarization common-aperture feed source, in particular to four working states, namely two working states of Ka frequency band and two working states of Ku frequency band, and belongs to the technical field of mobile satellite communication systems. Background technique [0002] The antenna as a feed source has certain requirements on the pattern, and the multi-band antenna needs to adopt a special structure to realize the same pattern taper of different frequency band patterns; the realization of the multi-band antenna generally adopts a single-antenna broadband design or multi-antenna composite Design; antennas with consistent phase centers and certain stability requirements not only need to be symmetrical in structure, but also uniform in surface current distribution, and should have corresponding tuning structures to adjust the phase center positions of different frequency bands; structure Compactness...

AI Technical Summary

Problems solved by technology

[0003] At this stage, helical antennas, corrugated horn antennas, etc. can achieve wider frequency bands, but it is difficult to achieve a single antenna covering multiple frequency bands with a large span, and to achieve a relatively consistent pattern within the working frequency band; antenna composite design can achieve span The relatively consistent pattern of the four working frequency bands is relatively large, but in general, the antenna volume is relatively large, and it is difficult to keep the phase centers of the antennas in different frequency bands consistent

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