Pouya AFLAKI, Renato NEGRA, Fadhel M. GHANNOUCHI
1 GHz current mode class-D power amplifier in hybrid technology using GaN
HEMTs
Abstract. This paper presents the design and implementation of a highly
efficient current-mode class-D (CMCD) power amplifier (PA) using commercial 2W
GaN HEMT devices. A switchedbased model developed in-house for the GaN power
device is used extensively for analysing and designing the 1 GHz CMCD PA in
hybrid technology. The load coupling network, comprising a load transformation
network, a higher harmonic impedance termination tank and a balun, measures only
3.7 cm×7.6 cm while providing suitable means for tuning the performance of the
amplifier. The fabricated hybrid CMCD PA delivers an output power of around 36
dBm with an DC-to-RF efficiency of 65% over a wide frequency band.
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