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A dual-band filtering push-pull power amplifier with a large frequency ratio employing a hybrid-mode bandpass response balun
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Ji-Yang CHU, Xiang WANG, Tian-Xiang CHEN, Jin-Dong ZHANG, Jun HU, Huangyan LI, Boyu SIMA, Wen WU. A dual-band filtering push-pull power amplifier with a large frequency ratio employing a hybrid-mode bandpass response balun[J]. Journal of Zhejiang University Science C, 1998, -1(-1): .
@article{title="A dual-band filtering push-pull power amplifier with a large frequency ratio employing a hybrid-mode bandpass response balun",
author="Ji-Yang CHU, Xiang WANG, Tian-Xiang CHEN, Jin-Dong ZHANG, Jun HU, Huangyan LI, Boyu SIMA, Wen WU",
journal="Journal of Zhejiang University Science C",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/ENG.ITEE.2025.0149"
}
%0 Journal Article
%T A dual-band filtering push-pull power amplifier with a large frequency ratio employing a hybrid-mode bandpass response balun
%A Ji-Yang CHU
%A Xiang WANG
%A Tian-Xiang CHEN
%A Jin-Dong ZHANG
%A Jun HU
%A Huangyan LI
%A Boyu SIMA
%A Wen WU
%J Journal of Zhejiang University SCIENCE C
%V -1
%N -1
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%@ 1869-1951
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/ENG.ITEE.2025.0149
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A1 - Ji-Yang CHU
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A1 - Jin-Dong ZHANG
A1 - Jun HU
A1 - Huangyan LI
A1 - Boyu SIMA
A1 - Wen WU
J0 - Journal of Zhejiang University Science C
VL - -1
IS - -1
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%@ 1869-1951
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/ENG.ITEE.2025.0149
Abstract: A dual-band filtering push-pull power amplifier (PA) with a large frequency ratio is presented in this paper. The developed filtering power dividing/combining network is based on microstrip line (MSL) and substrate integrated waveguide (SIW) hybrid-mode filtering balun. The MSL filtering balun works at S-band with an operational frequency range of 2.6-2.86?GHz. Meanwhile, the SIW filtering balun is designed for Ku-band operation, covering a frequency range of 13-13.65?GHz. Under these conditions, this prototype is capable of attaining a frequency ratio as high as five times the original value. Attributing to the inherent differential characteristic of the hybrid-mode filtering balun with a large frequency ratio, the proposed push-pull PA can not only realize the filtering functionality but also achieve second-harmonic suppression. To validate the designed concept, the proposed prototype has been designed, fabricated, and measured. Measurement results demonstrate that the proposed PA achieves a 7-dB small-signal gain while maintaining out-of-band spurious rejection during active testing. The developed dual-band filtering push-pull PA has achieved an excellent performance of a peak output power of 36.8 dBm at low frequencies and 36 dBm at high frequencies. Meanwhile, by employing dual-band filtering baluns, the PA inherently suppresses even-order harmonics while simultaneously providing filtering characteristics in both operational bands, which effectively suppresses near-band spurious signals.
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