High Efficiency Class-F MMIC Power Amplifiers at Ku-Band
February 2005
Matthew T. Ozalas, The MITRE Corporation
ABSTRACT
Two high efficiency Ku-band pHEMT power amplifier MMICs are presented in this paper. A single stage, high efficiency amplifier provides a peak power added efficiency of 57.6% with 10.5 dB associated gain and 26.5 dBm output power into a 50Ω load at 14 GHz. Additionally, a dual stage, high gain amplifier provides a peak power added efficiency of 50.4% with 19.7 dB associated gain and 27.5 dBm output power into a 50Ω load at 14.3 GHz. State-of-the-art efficiency performance at these frequencies is achieved through Class-F transistor operation. Process selection, circuit design, and measured results are described.
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