RF Front-End Design of Large Dynamic Range Receiver for Satellite Communication

In the electronic countermeasures (ECM) environment, the range of instantaneous dynamic signal is wide. Consequently, based on the principle of the match between the output voltage of RF front-end and the analog to digital converter´s (ADC) full-scale voltage, the super heterodyne digital intermediate frequency (IF) receiver supporting instantaneous large dynamic range is designed for the direct sequence spread spectrum (DSSS) system. The performance of noise figure, gain and dynamic range of RF front-end is also analyzed. The results of our simulation and tests show that in the condition of NF=4.07dB, the RF front-end maximum gain=74dB, SFDR=59.61, which can satisfy the satellite communication receiver´s need of the high sensitivity, low noise figure and large dynamic range.