Design of Millimeter Wave Transceiver Isolation System Based on Polarization Converter and Grating

In this paper, a millimeter wave transceiver isolation system integrated with polarization converter and grating is designed by quasi optical method. The polarization converter is composed of double-layer substrates, each of one is 200 µm thick quartz glass with a layer of metasurface structures on its surface. Besides, the grating is designed and optimized on a 0.1 mm thick copper sheet. The simulation and calculation results show that the isolation is higher than 20 dB and the transmission loss is lower than 0.85 dB and the receiving loss is lower than 1 dB at 72 – 82 GHz.