DOPPLER FREQUENCY SHIFT SIMULATOR Russian patent published in 2022 - IPC G01S17/58 

FIELD: microwave technology.

SUBSTANCE: invention relates to the field of microwave technology and can be used as part of stands for measuring and controlling Doppler radars in the target motion simulation mode with a wide range of speeds, as well as for building systems for simulating the Doppler frequency shift of moving and stationary objects. The backscatter Doppler frequency shift simulator contains a lithium niobate crystal, a piezoelectric transducer of ultrasonic vibrations with an upper and lower electrode, a controlled generator of ultrasonic electrical signals, and a metal screen with a dielectric gasket. The piezoelectric transducer is fixed with the upper electrode on the lower surface of the lithium niobate crystal, with the lower electrode on the outer surface of the dielectric gasket. The dielectric spacer is installed on the metal screen with its lower surface so that the upper surface of the crystal faces the front of the incident electromagnetic wave. The electrodes of the piezoelectric transducer are connected to the output of a controlled generator of ultrasonic electrical signals. The approach of a false target is simulated by an increase in the voltage level at the output of the controlled generator, and the removal is simulated by a decrease in the control voltage. The value of the simulated speed is set by the rate of change of the control voltage.

EFFECT: extension of the operating frequency range, in which the Doppler frequency shift is simulated during the backscattering of an electromagnetic wave due to a controlled change in the parameters of the scattering medium.

1 cl, 15 dwg, 1 tbl