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In this paper, an internally-matched GaN HEMT high efficiency amplifier for Space Solar Power Stations/System (SSPS) is presented. The internal matching circuit was designed so that 2nd and 3rd harmonics are tuned to obtain maximum power added efficiency (PAE). PAE of 70% was successfully obtained with 7W output power at 5.8GHz. All matching circuit is in a hermetically sealed package and no external...
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