Interrogator and responder for radio location system - involves responder which operates frequency switching circuits for retransmission of signal via another antenna

摘要: An interrogator activates a responder to provide distance information for radiolocation. Angle and message data are also provided automatically an aircraft. (1) provides outputs (3, 4) which comprise (3) received from (2). The transmits frequency modulated waveform form oscillator (10) sawtooth generator (11) is connected. These signals the antenna (12) by (20) on responder. This contains shift circuit (21) controlled (5) switching (26) select one of three frequencies. (F1, 2, 3) transmission via another (24). at pass tuned amplifiers (35, 36, 37) circuits (32, 33, 34) determine in original frequency. allows be derived.