UNAUTHORISED AIRCRAFT USE PREVENTION SYSTEM Russian patent published in 2009 - IPC B60R25/02 B64D45/00 G05G5/02 

FIELD: transport; aviation.

SUBSTANCE: system includes a fighter interceptor and a command post. The aircraft is equipped with a receiver, transceiving antenna, radiotransparent radome, switching unit, signalling light, automatic flight and landing control system, transmitter, master oscillator, analog message source, amplitude modulator, power amplifier, duplexer, two band filters, OR gate, amplitude limiter, synchronous detector, alarm sounder, phase doubler, two narrow-band filter, phase halver, and phase detector. The command post is equipped with a transceiving antenna, duplexer, receiver, two band filters, OR gate, amplitude limiter, synchronous detector, alarm sounder, transmitter, master oscillator, switch, pseudorandom sequence generators, phase handler, analog message source, amplitude modulator, and power amplifier. The fighter interceptor is equipped with a transmitter, master oscillator, e handler, analog message source, two OR gates, amplitude modulator, power amplifier, duplexer, transceiving antenna, receiver, two band filters, amplitude limiter, synchronous detector, alarm sounder, phase doubler, two narrow-band filter, phase halver, and phase detector.

EFFECT: improved noise immunity and reliability of controlled flight path change and subsequent landing; efficient prevention of unauthorised aircraft operation.

6 dwg