An Analytical Model for Improvement of Linearity and Efficiency of RF Linear Power Amplifiers for Radar Systems

Abstract

Abstract-Power amplifier is the key component in radar systems, so linearity and efficiency is the most important parameters in order to maintain the performance of power amplifier, based on matlab curve fitting toolbox an analytical model for improvement of linearity and efficiency of radio frequency (RF) linear power amplifiers (PAs) is introduced. This model simplifies the traditionally complicated methods of analysis of RF PA. According to a change of the direct current (DC) bias as a function of the alternative current (AC) input signal of RF linear PA the linearity and efficiency can be improved.

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

“…The gain is substantially proportional to the square of the elapsed time measured from the last radar pulse initiating the trigger signals. The amplifier consists of a series connection of two amplifiers, each of which has a gain varies linearly with the elapsed time [6]. As in the ultrasound scan devices, the TVGA works at the same range of frequencies in the radar signal processor at the IF range.…”