X-band AESA digital receiving sublattice with group signal processing from receiving emitters at an intermediate frequency

In the presented work, a 36-channel receiving sublattice (RS) of the X-band AESA is considered using group signal processing in an analog-to-digital converter (ADC) of the sum of synchronous non-phase signals from 36 receiving emitters (RE) on a low intermediate frequency (25 MHz). Digital samples of the amplitude of the total non-phase signal Ζ(tk) formed in the ADC at the moments of processing (tk) are calculated into digital samples at the moments tk of the amplitude of the total signal Ζ'(tk) with in-phase addition of 36 RE signals. Next, the digital samples Ζ'(tk) are sent to a digital-to-analog converter (DAC) at the output of which an analog output signal is generated at a carrier frequency of 25 MHz.