70–105 GHz wideband GaN power amplifiers

We report a new 70-105 GHz wideband GaN power amplifier which can enable the next generation of E and W-band transmitter modules. Two versions of the amplifier are presented. Across the 70-105 GHz range the balanced design demonstrates excellent S11 and S22 at -20 dB, small signal gain above 16 dB, output power above 20 dBm with associated gain higher than 16 dB and power added efficiency over 6%. By increasing the compression levels of the amplifier at 90 GHz we achieved output power of 24.5 dBm with associated gain of 12.4 dB and power added efficiency of 13.2%. The presented amplifier can be utilized in wideband transmitter modules covering E and W-band or in application specific modules covering narrower sections of the band (71-76 GHz, 81-86 GHz, 90-96 GHz) where they can be combined with higher power GaN amplifiers.