Rf Front-end Design Of Stokes Wave Receiver

Current in the global scope,human space activities and weapons testing are more and more intensive,gradually showing the situation of letting a hundred flowers bloom,the aerospace industry of our country is to flourish.However when the return satellite,spaceship,intercontinental ballistic missiles and aircraft to ultra high speed into the atmosphere,will enter a period of communication interrupt "black area",the generation of the black barrier will seriously affect the monitoring of the position of the ground to a certain extent,and it will affect the safety of the spacecraft.The existence of black barrier can severely impact to the spacecraft position monitoring,to a certain extent affect the safety of spacecraft recovery.In this design,we utilize the interaction between high frequency pump wave signal and navigation signal wave by using the penetration plasma,scatter Stokes wave contains navigation information.And then will get the Stokes frequency by conversion processing,so as to extract the aircraft navigation signals.In this paper,by comparing the several kinds of RF receiver model,finally chose the way of super heterodyne receiver design.This paper mainly analyzes the principle of super heterodyne receiver,respectively expounds the microstrip line filter,low noise amplifier,mixer and frequency source in the principle and function of receiver,the design scheme and simulation are presented.Contains a navigation information on the receiver front-end,Stokes wave(about 17.3 GHz)signal through the low noise amplifier amplification,and then by the microstrip line filter,filter out useless signals into the mixer module.First of all,after a down-conversion,make it become a GPS L1 frequency(1575.42MHz),after the two way power divider,one of the signal direct output,then another signal conversion to the IF of GPS L1(46.42MHz),the final output through the IF filter.The super heterodyne receiver hardware part mainly includes low noise amplifier,microstrip filter using parallel coupled microstrip line structure and the low local oscillator of two frequency conversion circuit.After the completion of each module of the simulation design,build a superheterodyne receiver system simulation platform,the simulation data import module and then run the system,quantitative analysis of the performance of the system parameters.