Abstract
In this paper, a high-efficiency PA using the novel harmonic control circuit is realized with Si LDMOSFET. This harmonic control circuit has the short im-pedances for the second- and third-harmonics, which has been used to design the in/output matching network. The efficiency enhancement effect of the pro-posed harmonic control circuit is superior to the class-F or inverse class-F har-monic control circuit. Also, in case the harmonic control circuit has been used to the input matching network as well as the output matching network, the efficiency of the proposed PA has been improved all the more. The measured maximum PAE of the proposed PA is 87.1 % at 1.71 GHz band.
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