Time varying gain amplifier linearity enhancement for wide dynamic range in radar receiver

Radar must be able to detect targets within the maximum designed range, targets echoes have different power levels due to radar cross section, jamming, and clutter, in this paper a new technique for increasing the wide dynamic range of the radar based on time varying gain amplifier (TVGA) was proposed for achieving compensation of the power loss due to range, and applying an adaptive sweep optimization (ASO) technique for increasing linearity of TVGA, the simulation showed that intermodulation ratio (IMR) was improved, the comparison results showed that the probability of detection was increased, the radar was tested for detecting three targets at different ranges.