IRRADIATING SYSTEM OF A TRACKING MIRROR ANTENNA Russian patent published in 2023 - IPC H01Q5/00 

FIELD: antennas.

SUBSTANCE: used as part of reflector antennas of space communication earth stations. The irradiating system of the servo reflector antenna consists of a multimode horn, an orthogonal mode coupler H₂₁, a dual-band frequency diplexer, an orthomode converter, an auto-tracking channel, a reception channel, a local oscillator module and a control module. The auto-tracking channel consists of a pair of low-noise frequency-to-intermediate-frequency converters “МШУ-Пр”, installed at the outputs of the H₂₁ mode coupler, and an UPS polarization matching device connected to the outputs of “МШУ-Пр”. The receiving channel consists of similar elements installed at the output of the OMC. The four-channel local oscillator module LOM and the control module CM are connected to the inputs of the corresponding “МШУ-Пр”. “МШУ-Пр” perform coherent frequency conversion of signals with external heterodyne signals from the CM, which has independent phase control of heterodyne signals in each channel. UPSs have an identical construction and are formed by three cascaded quadrature directional couplers QDC with adjustable connections. The outputs of both UPSs receive separated signals of orthogonal polarizations with minimized cross-components of these signals. With temporal changes in the polarizations of incoming waves, both linear and rotating, the differential phase shift of the phase shifters PS1 and PS2 changes accordingly in both UPSs.

EFFECT: provision in tracking mirror antennas of stabilization of the angular dependence of the error signal and minimization of cross-polarization components of signals at the outputs of the receiving channel for any polarizations of incoming signals, as well as reduction of overall dimensions and weight of the irradiating system.

1 cl, 2 dwg