Development of S-Band Dual-channel High-power Waveguide Rotary Joint

A S-band dual-channel high-power waveguide rotary joint is proposed in this paper,the structural composition,selection of key dimensions,mode matching and isolation between channels are discussed in detail.Simulation analysis and measurement results show that.Over 10% bandwidth.The VSWR is less than 1.1,the variation of VSWR with rotation is less than 0.02,the insertion loss is less than 0.2dB,the insertion loss variation is less than 0.02dB,the isolation between the two channels is more than 85dB,the power captivity is more than 1MW.All performance are better than the similar products abroad.The constitution is simple and easy for production and adjusting.This rotary joint can be applied in radars and microwave systems widely.