GaN Amplifiers of Selectable Output Power Function with Semi-Custom Matching Networks

Yutaro YAMAGUCHI; Masatake HANGAI; Shintaro SHINJO; Takaaki YOSHIOKA; Naoki KOSAKA

doi:10.1587/transele.2019MMP0005

Special Section on Microwave and Millimeter-Wave Technologies

GaN Amplifiers of Selectable Output Power Function with Semi-Custom Matching Networks

Yutaro YAMAGUCHI, Masatake HANGAI, Shintaro SHINJO, Takaaki YOSHIOKA, Naoki KOSAKA

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Keywords: gallium nitride, high power amplifiers, S-band, broadband amplifiers, impedance matching tuning

JOURNAL RESTRICTED ACCESS

2019 Volume E102.C Issue 10 Pages 682-690

DOI https://doi.org/10.1587/transele.2019MMP0005

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Abstract

A methodology for obtaining semi-custom high-power amplifiers (HPAs) is described. The semi-custom concept pertains to the notion that a selectable output power is attainable by replacing only transistors. To compensate for the mismatch loss, a new output matching network that can be easily tuned by wiring is proposed. Design equations were derived to determine the circuit parameters and specify the bandwidth limitations. To verify this methodology, a semi-custom HPA with GaN HEMTs was fabricated in the S-band. A selectable output power from 240 to 150 W was successfully achieved while maintaining a PAE of over 50% in a 19% relative bandwidth.

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