Research on Terahertz Single Point Satellite Ground Communication System

Terahertz wave system with specific frequency band can realize high-speed, high security and long-distance transmission under specific climate conditions. It is expected to become an effective substitute for the traditional satellite communication system based on microwave frequency band. Although the strong absorption of terahertz wave through the atmosphere due to water vapor has serious attenuation, in some dry areas on the earth, the water and other substances with strong absorption of terahertz wave are very thin, which is very suitable for satellite ground terahertz communication. In this paper, based on the theory of solid-state electronics technology, a satellite ground single point communication link system between geosynchronous orbit satellite and the ground with 220GHz as the central frequency is proposed. A desktop experimental verification system is set to study the transmitting function of the model. Simulation and test results show that the system can possess the communication performance with high speed and low bit error rate. After that, by improving the performance of each part of the system, it can greatly improve the communication characteristics.