The Design of a 220GHz Single Sideband Communication System

This paper presents the design of a 220GHz single sideband (SSB) high speed communication system. The system is based on a set of 220GHz solid state transceiver. In order to make the communication system to achieve single sideband transmission, a 220GHz waveguide bandpass filter (BPF) with an ultra-high selectivity is designed. Based on this BPF circuit, the structure diagram of the communication system is presented. In addition, the simulation results show that the conversion loss of the subharmonic mixer is less than 8 dB from 200GHz to 240GHz and during the working frequency band of the BPF, return loss is better than 20dB, and the 30-dB rectangular factor is approximately 0.7, which guarantees the single sideband operation of the 220GHz communication system.