The Research And Design Of Phase Conjugation Mixer In Retro-directive Array

In this thesis, a mixer combined with the image rejection and phase conjugation is designed and simulated.Firstly, the performance parameters and principle of common mixer are researched, and the principle of single-balanced mixer, as well as image rejection mixer has been discussed.Secondly, the phase conjugation mixer with RF mixing mode is analyzed .then, a design of phase conjugation mixer with image rejection is finished and simulated.Afterwards, the size of micro-strip line and the parameters of phase conjugation mixer are calculated with the research of each module of this mixer. Including the 180°hybrid ring in 5.8GHz,the microstrip coupled line band pass filter in 5.8GHz and 11.6GHz,and the Wilkinson power divider in 11.6GHz.Simulation and optimization of these modules is finished with the parameter ahead in ADS. According to the data optimized before, each layout of the microstrip line is given. The parameter index is as follows:The port reflection coefficient of the hybrid ring has reached -27dB, the isolation between 1,4port and 2, 3 port is -44dB.The insertion loss in the central frequency of the 5.8GHz Coupled Microstrip Line Band-pass Filter has reached -1.576dB. Reflection coefficient of 1-port is -24.771dB.The insertion loss in the center frequency of the 11.6GHz Coupled Microstrip Line Band-pass Filter has reached -1.24dB. Reflection coefficient of 1-port is -17.116dB.The reflection coefficient of 1-port in the 11.6GHz Wilkinson power divider is -22dB,the isolation between 2-port and 3-port is -16.955dB.Finally a circuit of image rejection phase conjugation mixer is builted, and then a simulation of this mixer is finished in HB simulation. Phase of the input and output is conjugated .the error is 0.384°.