| 摘要 |
FIELD: physics, radio. ^ SUBSTANCE: invention relates to systems for detecting objects by reflecting radio waves from the surface of said objects and can be used in radio location to detect a range-extended target. The technical result is achieved due to possibility of detecting a range-extended target by measuring duration of a signal reflected from a target ä0, determining the increase in duration of the reflected signal öä=ä0-äp, where äp is duration of the probing signal, determining the ratio =öä0/äp, where ëÑ0.01 indicates a range-extended target and < 0.01 indicates a point target. The device which realises said method has a transmitter, an antenna switch, an antenna, a receiver and a detection channel connected in a certain way. The transmitter has a modulator, a microwave oscillator and a first switch; the detection channel has a first delay line, a second switch, a mixer, an intermediate frequency amplifier, a signal duration measuring device, a subtractor, a divider and a threshold device. Components of the transmitter and the detection channel are connected to each other and the rest of the components of the detector in a certain way. ^ EFFECT: increase in information content. ^ 2 cl, 1 dwg |
