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Two kinds of RF power combiner are studied. Matched Wilkinson combiner shows very good linearity but low power efficiency. Unmatched Wilkinson combiner used at the output of class-B amplifiers can be optimized in order to obtain the same good linearity of a matched Wilkinson combiner but better efficiency. Careful attention has to pay to the amplifier impedance to stop instability that may create...
Different kinds of RF power combiner are studied. Wilkinson and hybrid combiner show very good linearity but low power efficiency. Chireix combiner using stubs at the input shows good efficiency and bad linearity of system. This paper shows that an unmatched chireix combiner without stub used at the output of class-B amplifiers can be optimized in transmission line length in order to obtain the same...
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