Experimental Verification of Lumped Element Circuit Synthesis Method for Class-F Microwave Amplifier Using InGaP/GaAs HBT(Microwaves, Millimeter-Waves)

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In this letter, the validity of lumped element class-F amplifier circuit design approaches, which were previously proposed by the same authors, has been demonstrated experimentally using microwave InGaP/GaAs HBT. By means of the proposed class-F amplifier design method, more than 4th order higher harmonic frequencies can be taken into account in class-F microwave amplifier design using only lumped element components. In this approach, miniaturization of class-F amplifier circuit has also been realized. A collector efficiency of 71.2% and a poweradded efficiency of 69.2% have been measured at an operating fundamental frequency of 1GHz considering up to the 4th order higher harmonic frequency.
社団法人電子情報通信学会の論文
2005-12-01