Robust X-band low noise limiting amplifiers

GaN technology is today well established for power amplifiers but also for robust receiver components. In this paper we present the design and measurement results of two different robust LNAs with different limiter functionalities included. One version with 1.6 dB noise figure which survives 4W input power and with the included current limiter the maximum output power is only 17dBm. The other version with input limiter survives more than 10W input power with a noise figure of 2 dB.