RADIO ENGINEERING SYSTEM FOR SEARCH AND INSPECTION OF OBJECTS FITTED WITH PASSIVE RESPONDER Russian patent published in 1997 - IPC

FIELD: radiolocation, radar systems of interrogator- responder type for search of objects. SUBSTANCE: given engineering system has interrogator 1 including two transmitters 2,3 with two transmission antennas 4,5 and one reception antenna 7 and passive responders 8 including reception oscillatory circuit 9, nonlinear element 10 and transmission antenna 11, warning device 12. EFFECT: enhanced authenticity of system is achieved by exception of false operation caused by parasitic harmonic components of spectrum of signal emitted by transmitter of interrogator. 2 cl, 2 dwg