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A novel distributed amplifier structure based on a power recycling scheme is proposed. It allows the amplifier gain to be enhanced while providing optimum output power and a perfect input match within a moderate bandwidth. The ideal performance of this novel distributed amplifier, called the power recycling distributed amplifier, is analysed. Limitations introduced by mismatch and losses in the gate line have also been assessed. A prototype of such an amplifier has been designed, manufactured and measured. The experimental results demonstrate its viability as an optimum class-A active power combiner with enhanced gain and excellent input match.

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