A C-band low noise amplifier for satellite communications

Abstract

A hybrid C-band low noise amplifier (LNA) has been developed for satellite communication applications, using a pseudomorphic HEMT technology with a gate-length of 0.25 /spl mu/m. The three-stage LNA has achieved, a noise figure of 1.9 dB with an associated gain of 24.5 dB at ambient room temperature over a 3.7-4.2 GHz frequency range. The output third order intercept point [1P3] of 18.5 dBm was obtained with the two tone spacing of 5 MHz. The amplifier dissipates 95 mW from a 2 V supply.