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OUT-OF-PHASE POWER AMPLIFIER AND METHOD AND DEVICE FOR REALIZING OUTPUT MATCHING THEREFOR AND POWER AMPLIFIER BRANCH
OUT-OF-PHASE POWER AMPLIFIER AND METHOD AND DEVICE FOR REALIZING OUTPUT MATCHING THEREFOR AND POWER AMPLIFIER BRANCH
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机译:用于实现输出匹配的电相功率放大器和方法和装置和功率放大器分支
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摘要
An out-of-phase power amplifier and a method for realizing output matching therefor, comprising: calculating an offset angle of a combiner according to signal power back-off of a signal source, i.e., a signal peak-to-average ratio; determining, according to the calculated offset angle, a ratio of optimal impedance Zm1 corresponding to a peak output power of a power tube to optimal impedance Zm2 corresponding to a mean output power of the power tube, wherein the ratio is a standing-wave ratio; determining, according to the size of an isostatic standing-wave ratio circle, a maximum power point impedance Zopt of the power tube by means of a load pull mode; by taking the maximum power point impedance Zopt as a reference point, finding out a back-off high-efficiency point impedance Zbk_eff on the isostatic standing-wave ratio circle; and matching the maximum power point impedance Zopt and the back-off high-efficiency point impedance Zbk eff, as corresponding impedance values, respectively to two input ends of the combiner.
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