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An ultra-wideband power amplifier designed through a bandwidth expansion strategy

Published online by Cambridge University Press:  13 May 2024

Xuefei Xuan Open the ORCID record for Xuefei Xuan [Opens in a new window] ,
Zhiqun Cheng Open the ORCID record for Zhiqun Cheng [Opens in a new window] ,
Brendan Hayes ,
Zhiwei Zhang Open the ORCID record for Zhiwei Zhang [Opens in a new window] ,
Tingwei Gong Open the ORCID record for Tingwei Gong [Opens in a new window] ,
Shenbing Wu  and
Chao Le
Xuefei Xuan*
Affiliation:
The School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, China The School of Electronic Engineering, Huainan Normal University, Huainan, China The School of Electronic Engineering, Dublin City University, Dublin, Ireland
Zhiqun Cheng
Affiliation:
The School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, China The School of Information Engineering, Xinjiang Institute of Technology, Xinjiang, China
Brendan Hayes
Affiliation:
The School of Electronic Engineering, Dublin City University, Dublin, Ireland
Zhiwei Zhang
Affiliation:
The School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, China
Tingwei Gong
Affiliation:
The School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, China
Shenbing Wu
Affiliation:
The School of Electronic Engineering, Huainan Normal University, Huainan, China
Chao Le
Affiliation:
The School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, China
*
Corresponding author: Xuefei Xuan; Email: xuanxuefei2022@163.com
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Abstract

A bandwidth expansion strategy for ultra-wideband power amplifiers (PAs) is presented in this letter by adopting a parallel impedance matching architecture. This design strategy can effectively reduce the impedance conversion ratio between the load and the target impedance of the PA, thereby providing a feasible solution for broadband impedance matching. Subsequently, a commercially available 10 W gallium nitride device and a two-stage Wilkinson power divider network are combined to achieve the verification of the proposed theory. The results of the measurement show that within the target frequency band of 0.9–3.9 GHz, 58.5–71.2% of the drain efficiency and 9.1–12 dB of gain can be achieved with a saturated output power of 39.1–42 dBm.

Keywords

bandwidth expansion strategyimpedance conversion ratioparallel impedance matching architecturepower amplifiers (PAs)ultra-wideband
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 6
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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