Abstract

The design and measurement of a C-band HBT high-power amplifier (HPA) is discussed. The amplifier is realised in the HB20P power HBT process of UMS. The HPA combines a high average output power of 9 Watt with both a high gain of 21.6 dB and a high power added efficiency (PAE) of 50% over about 20% bandwidth at the nominal 8 V collector voltage. At a collector voltage of 10 V an average output power of 10.3 Watt has been measured. The high PAE is realised with the help of an inverse class F harmonic termination scheme. A good agreement between measurement and simulation results is demonstrated.