Port-match optimization of microwave low-noise amplifiers

Abstract

The traditional approach to microwave low-noise amplifier design is to use graphical aids involving gain, noise, mismatch, and stability circles. In this paper, we propose a method, which avoids graphical methods, and uses a formula for the source reflection coefficient to minimize noise measure, and a robust numerical method for the load reflection coefficient to optimize the match at each port. The method is tested on a number of different transistors.