Design and Implementation of Ultra-Wideband Microwave Optical Transmission System

With the rapid development of satellite technologies such as communications, navigation, and remote sensing, satellite ground testing has placed new demands on microwave long-distance and multi-band testing. The satellite ground test needs to build a microwave path between the ground equipment (A ground) and the spacecraft (B ground). In this paper, the distance between A and B is 4.31Km. The ultra-wideband optical transmission system uses optical external modulation technology, covering 0.1GHz-40GHz microwave frequency, which can effectively solve the problem of large loss of coaxial cable links. In practical engineering applications, G.652 single-mode fiber is used. Microwave 30GHz-40GHz propagates through optical wave 1550nm and encounters fiber chromatic dispersion effect at long distances. The analysis is carried out and the solutions are given, which can be used for reference and research by the designers of microwave optical transmission systems.