Comparison of coplanar 60-GHz low-noise amplifiers based on a GaAs PM-HEMTtechnology

For use in low-noise receivers of communication or radar systems, three dif ferent two-stage amplifiers for 60 GHz, using a 0.15-mu m PM-HEMT technolog y on GaAs, have been compared in terms of gain and noise figure. The amplif iers realized in coplanar waveguide technology (CPW) differ in the matching networks of the two stages, optimized either for low-noise or maximum gain bias condition. At 59 GHz, a minimum noise figure of 3.0 dB with an associ ated gain of 9.3 dB and a maximum gain of 12.2 dB with a noise figure of 3. 8 dB were achieved.