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In this paper, high-efficiency power amplifier is implemented using adaptive bias control circuit for the wireless power transmission (WPT). The high efficiency power amplifier uses the Class-E amplifier structure because the efficiency of the WPT system is strongly affected by the efficiency of power amplifier. The adaptive bias control circuits consist of the directional coupler, power detector...
In this paper, a quad-band inverse class-F power amplifier using the novel composite right/left-handed (CRLH) transmission lines (TLs) is developing covering 700 MHz, 800 MHz, 1800 MHz, and 2140 MHz. The novel CRLH TL metamaterials with two left-handed (LH) (backward) and two right-handed (RH) (forward) pass bands are used for quad-band operation. The second- and third-harmonics for four bands are...
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