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The input power drive of Doherty power amplifier (PA) is analyzed and a proper input dividing technique without a coupler is introduced. The efficiency and linearity are enhanced by the uneven power drive and proposed output matching circuits. The PA circuit is realized using a 2-mum InGaP/GaAs HBT process and combined using merged lumped-components for Doherty operation. For wireless broadband (WiBro)...
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