High linearity K-band InP HBT power amplifier MMIC with 62.8 PAEat 21 GHz

摘要

We report the first InP HBT MMIC power amplifier chip results atK-band. A 21 GHz fully monolithic 2 mil InP HBT power MMIC whichachieves 62.8% PAE with 10 dB gain and 20 dBm output power. A higherpower MMIC at 18.5 GHz achieved 25 dBm output power with 40% PAE at 1 dBcompression under class AB operation with no noticeable gain expansion.The MMIC has low distortion with 3rd order IM suppression C/Iof -30.2 dBc and 5th order suppression C/I of -50.8 dBc at a combinedoutput power of 19.3 dBm. Both amplifiers were operated under low DCpower with a conservative peak current densities of <35 kA/cm2 and a Vce of <3.3 V; showing a potential reliable applicationin communications