A K-Band Waveguide With Integrated Reconfigurable Circular Polarizer

In the communication system, a device that can flexibly switch the polarization mode with broadband is necessary. In this paper, a K-Band waveguide with integrated reconfigurable circular polarize is proposed. It can switch between left-handed and right-handed polarization modes. To expand the operating bandwidth, a new waveguide structure is introduced at the output of device. The simulation results shows that a broadband operating bandwidth of 17.5-21.5 GHz, with the return loss better than 20 dB, and the axial ration under 1.1 dB, is obtained. The proposed integrated reconfigurable circular polarizer features broadband, high efficiency, and easy to matching.