Research On Monopulse Tracking System Highly Accurate And Real-time Phase Calibration

Highly accurate and real-time phase calibration is a important part of monopulsetracking system. In order to solve phase balance, cross-couping and improve thepointing accuracy of satellite antennas, this paper proposed a modified dual-channelangle tracking receiver which has Fractional Pll Synthesizers with highly accurate phasecontrol.Firstly, the basic knowledge of Relay Satellite angle tracking system is introduced.Then this paper compares single channel, dual-channel and three channel monopulsetracking receiver, analyses their designing theory.Being ground on this, here giving amodified dual-channel receiver which can solve the problem of the cross-couping.Secondly, Fractional Pll Synthesizers is elaborated, which was adopted in a modifieddual-channel receiver. Finally, the phase model of the modified dual-channel receiverwas simulated by ADS. According to the simulation conclusion, the IF signal phase ofsum-difference channels reached to balance by shifting the phase of the Local Oscillator.This paper accomplished the requirement of avoiding cross-coupling and improvingthe the pointing accuracy of satellite antennas.