Plate antenna with polarization adjustment

The invention discloses a plate antenna with polarization adjustment, which belongs to the field of satellite communication. The plate antenna with polarization adjustment comprises a polarization adjusting device connected between an antenna radiation system and a back-end RF circuit, wherein the polarization adjusting device comprises a polarization synthesizer, a waveguide tube and a depolarization device, the polarization synthesizer and the depolarization device are each provided with two paths of polarization connecting ports and a public port, the waveguide tube is connected between the public port of the polarization synthesizer and the public port of the depolarization device, and the depolarization device can rotate around an axis of the waveguide tube; the antenna radiation system comprises two paths of polarization signal transmission channels, the two paths of polarization connecting ports of the polarization synthesizer are respectively connected with the two paths of polarization signal transmission channels; and at least one of the two paths of polarization connecting ports of the depolarization device is connected with the back-end RF circuit. Through structure adjustment, the plate antenna only adopts a very few microwave passive components, achieves polarization adjustment, and expands the application range.