Circular waveguide 180-DEG polarization tracker

Abstract

The invention provides a circular waveguide 180-DEG polarization tracker, which comprises a splitter, an inverter and a combiner. The splitter is used to split the two modes in a circular waveguide ora square waveguide; the inverter is used to invert the two split modes to generate a 180-DEG phase difference; and the combiner is used to combine the two modes after the inversion to a dual mode inthe circular waveguide or the square waveguide, and thus, a polarization tracker is realized. According to the principle that the polarization direction of linearly polarized waves changes after passing through the 180-DEG polarization tracker, a rotating joint is driven by a motor to rotate the 180-DEG polarization tracker, and satellite signals in any polarization direction can be tracked. The polarization tracker has the advantages of compact structure, stability and reliability, accurate phase difference, excellent performance index and large power capacity, is particularly suitable for asatellite communication antenna feeder system, and has a broad application prospect.

Description

technical field [0001] The invention relates to the field of satellite communication, in particular to a circular waveguide 180° polarization tracker. Background technique [0002] Polarization tracker is an important device widely used in satellite communication "communication in motion" system. During the movement of the mobile station, when the orientation of the mobile station antenna is inconsistent with the horizontal polarization or vertical polarization direction of the satellite signal line polarization wave, the polarization tracker can be used to perform polarization tracking, so as to correctly receive satellite signals. [0003] Commonly used polarization trackers include hook probes and 180° phase shifters. In the hook probe type polarization tracker, a hook probe is set in a circular waveguide, and the motor drives the rotating joint to rotate the probe to point to the correct polarization direction. The polarization tracker of the 180° phase shifter type us...

AI Technical Summary

Problems solved by technology

[0004] Compared with the hook probe type, the 180° phase shifter type polarization tracker has the advantages of stability, reliability, and large power capacity, but its disadvantage is that it generates a 180° phase shift and requires a larger length. The frequency of satellite communication is more obvious, so it is not suitable for occasions where the feed system is flat

In addition, the actual phase shift will deviate from 180° for the polarization tracker designed by the phase shift type. If the deviation is large, it will affect the system index

Images