35 GHz and 60 GHz low noise HEMT MMIC amplifiers for civil applications

Monolithic HEMT (high-electron-mobility-transistor) low-noise amplifiers have been developed for civil applications at Q and V bands. They consist of two-stage amplifiers with 0.25- mu m HEMTs. At 35 GHz and 60 GHz, they exhibit, respectively, more than 15 dB of gain with 4-dB noise figure and 12.5-dB gain with a noise figure between 5 and 6 dB over a 10% frequency range. Experimental results show high performance and high yield ( approximately=80%) (no critical elements) and indicate suitability for civil low-cost applications. During the design, a special effort was made to improve the stabilization of low-noise amplifiers at low frequencies, by damping with RC circuits and the associated bonding wire. This is essential for its integration in a whole module.<>