MULTI-CHANNEL RECEIVER WITH DOUBLE FREQUENCY CONVERSION Russian patent published in 2023 - IPC H04B1/06 

FIELD: radio engineering.

SUBSTANCE: invention can be used in radar systems. The result is achieved in that the double frequency conversion receiver contains four receiving channels, each of which contains the first band pass filter, a protective device, a low noise amplifier, the first mixer, the second band pass filter, the first intermediate frequency amplifier, the first attenuator, the second mixer, second intermediate frequency amplifier, second attenuator, third attenuator, the third band pass filter. Each receiving channel has seven low-pass filters and a power amplifier. Further, two signal conditioning circuits, as well as a power source, are additionally introduced into the multichannel receiver.

EFFECT: improved noise immunity and selectivity due to better suppression of unwanted combination components resulting from the conversion of the frequency spectrum of input signals, improved suppression of external interference and spurious radiation outside the operating frequency band.

1 cl, 1 dwg