Lock-style Non-reciprocal Ferrite Phase Shifter Modeling, Simulation And Developed

In this article, it primarily covers about electrically controlled ferrite phase shifter's stability of loss and phase, and the main point is the stability of phase. We design a C waveband latching un-reciprocal ferrite phase shifter, and introduce the theory of phase shifter, the simulation of phase shifter model, the design of structure and thermal simulation, the theory of drive control. And it also analyzes the factor which influence the loss of phase shifter and the stability of phase, to research the resolving method, especially which adopt circuit of the feedback compensation to improve the stability of phase.Using computer to cooperate with simulation can improve the working efficiency obviously, we adopt HFSS finite element analysis software to simulate and optimizing the S parameter of phase shifter, and we adopt Solidworks three-dimensional software to design the structure of the phase shifter, use it's plug-in COSMOS to simulate the thermal condition of the phase shifter, and we make samples of C waveband latching un-reciprocal ferrite phase shifter.The difficulty of the phase drifter is the phase drift under the temperature and under the power, in this article mainly use the way which optimize in structure and focus on the drive feedback technique to control the phase drift. We make the driver which use the three drive compensation ways, feedback compensation based on temperature, magnetic flux feedback compensation and successive flux feedback compensation. The experimental data shows, among the three compensations the successive flux feedback compensation has the best performance, for the successive flux feedback compensation has added the compensation to the demagnetization process of the magnetic hysteresis loop. Though the successive flux feedback compensation is hysteresis compensation, the change of ferrite's performance is a gradual change process; the contrast test under stress shows the successive flux feedback compensation can compensate the phase drift well under the stress. So if we adopt the successive flux feedback compensation technique, it can improve the phase stability of the phase shifter obviously.