Frequency Hopping Synthesizer And Frequency Hopping Transceiver In Satellite Communications

Under the background of information and networking technology,data link of satellite has been an essential fundamental resource.However,the effectiveness and safety of the open channel characteristics of satellite communication are threatened.In this thesis,based on the satellite communication anti-jamming technology researches,transceiver system applied with broadband frequency hopping is designed.In this thesis,a novel frequency hopping source in K-band with 500MHz bandwidth is designed.The phase noise values at 1KHz,10KHz,100KHz and 1MHz offsets from the frequency are batter than-75dBc/Hz,-110dBc/Hz,-115dBc/Hz,and-125dBc/Hz respectively.A low noise frequency hopping transmitter for wideband application whose bandwidth is 1.6GHz in Ka-band is presented.The phase noise values at 1KHz,10KHz,100KHz,1MHz and 10MHz offsets from the frequency are batter than-70dBc/Hz,-90dBc/Hz,-105dBc/Hz,-120dBc/Hz and-125dBc/Hz respectively.A low noise frequency hopping receiver with 1.6GHz bandwidth for wideband application is presented in Ku-band.The EVM(Error Vector Magnitude)is measured with 1M SPS signal at carrier frequency.The EVM of 16QAM is batter than 0.5%RMS.The EVM is measured with 10M SPS signal at carrier frequency.The EVM of 16QAM is batter than 1%RMS.Microstrip bandpass filters are designed which are applied in the.system and have been good test results.In addition,interface control program and FPGA progrom are designed for the frequency hopping transceiver.Testing results shows that the system software can work well with the system hardware.A transceiver system is designed whose channel bandwidth is 1.6GHz.The transceiver system achievs 500MHz instantaneous hopping ability with 1.6GHz bandwidth.This satellite communication system has an excellent anti-jamming and anti-interception performance.