DOPPLER VELOCITY AND DRIFT ANGLE METER WITH FUNCTION OF MEASURING TRUE ALTITUDE WITH IMPLEMENTATION OF INTRINSIC SENSITIVITY OF RECEIVING DEVICE Russian patent published in 2025 - IPC G06F3/01 G01S13/60 

FIELD: aircraft instrumentation.

SUBSTANCE: essence of the invention consists in the fact that low-noise amplifiers are introduced into the Doppler velocity and drift angle meter (DVDM), a microwave power divider by three is introduced into the transmitting path. At that, three-beam receiving and transmitting antennae are made so that isolation between them is from 35 to 45 dB; to generate heterodyne signal from spurious leaked signal, unbalanced mixers are introduced, 3-channel intermediate frequency switch is introduced. At that, intermediate frequency amplifier has two outputs intended for high-speed and altimeter channels of DVDM; phase shifter is introduced to change the phase of the reference signal of the high-speed channel by 90°, synchronous detectors are introduced for high-speed and altimeter channels, phase detector combined with reference signal generator is introduced, second input of synchronous detector of high-speed channel is connected to output of phase detector, combined with generator of reference signals through phase changer, the second input of the synchronous detector of the altimeter channel is connected to the output of the phase detector.

EFFECT: improved technical characteristics of DVDM.

1 cl, 1 dwg