SINGLE-CHANNEL MONOPULSE RADAR SYSTEM DETERMINING DIRECTION TO TARGET Russian patent published in 1997 - IPC

FIELD: radio engineering radiolocation. SUBSTANCE: invention can be used for single-channel reception of signals and extraction of information in aboard amplitude sum-difference monopulse tracking radars with in-pulse phase-shift keying of probing signals by binary multiposition code. Integration of sum signal with difference signals of azimuth and elevation angle is realized on high frequency in turn with period of repetition of probing signals by change of phase of difference signal and its subsequent summing with sum signal. Change of phase of difference signal is so provided that at each time moment its phase is shifted by 90 deg relative to phase of sum signal. Isolation of frequency-transformed and amplified signals is carried out in quadrature channels of sum and difference signals. For this orthogonal harmonic reference voltages are used in quadrature channels meant for extraction of sum signal and orthogonal reference voltages with phase changing in compliance with FS code in step with change of phase of difference signal across input of system are used in quadrature channels intended for extraction of difference signal. Constant components caused by lack of knowledge of initial phase of received signal and cross coupling of channels are suppressed by blocking capacitors. Isolated quadrature components of FS signals are transformed on video frequency to digital code, are processed in digital compression filters and are used for extraction of signals of angular mismatch which are fed in turn into proper channels of angular target tracking in step with supply of difference signals for integration with sum signal across input of system. EFFECT: enhanced functional efficiency of radar system. 6 cl, 1 dwg