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W2120408649 abstract "Abstract This paper presents a broadband high-power amplifier using transmission-line transformers with a high impedance transformation ratio. Two series-connected transformers with 1:8 and 1:1 impedance transformation ratios are used at the load network of a single-balanced high-power amplifier to match the low load impedance in broadband. The same transformer configuration is also used at the input network. A negative feedback is applied to improve the gain flatness and to increase the stability over the broadband. In order to validate the proposed circuit structure, a broadband high-power amplifier is designed and implemented to achieve an output power of more than 400 W in the frequency band of 30 to 500 MHz. The implemented power amplifier exhibits a flat gain response within 1.80 dB at an average of 19.1 dB and high power-added efficiencies of 28.0 to 56.9 at an output power of 400 W over the entire frequency band." @default.
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W2120408649 date "2013-06-21" @default.
W2120408649 modified "2023-10-17" @default.
W2120408649 title "400 W broadband power amplifier using transmission-line transformers with 1:8 impedance transformation ratio" @default.
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W2120408649 doi "https://doi.org/10.1080/09205071.2013.811122" @default.
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