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Design of Bandpass Filtering Power Amplifier Based on Coupled Microstrip Line Structure
  • +4
  • Baoquan Zhong,
  • Zhiqun Cheng,
  • Minshi Jia,
  • Bingxin Li,
  • Kun Wang,
  • Zhenghao Yang,
  • Zheming Zhu
Baoquan Zhong
Hangzhou Dianzi University Department of Electronic Information Engineering
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Zhiqun Cheng
Hangzhou Dianzi University Department of Electronic Information Engineering
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Minshi Jia
Hangzhou Dianzi University Department of Electronic Information Engineering

Corresponding Author:minshi@hdu.edu.cn

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Bingxin Li
Hangzhou Dianzi University Department of Electronic Information Engineering
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Kun Wang
Hangzhou Dianzi University Department of Electronic Information Engineering
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Zhenghao Yang
Nanjing University of Information Science and Technology
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Zheming Zhu
Hangzhou Dianzi University Department of Electronic Information Engineering
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Abstract

This letter presents a broadband high-efficiency power amplifier (PA) based on a series of continuous modes (SCMs). A novel filtering matching network is proposed for realizing the output matching network (OMN) of the PA. The network consists of a branch-loaded cascade-coupled microstrip line structure (BLCCMLS) and a harmonic control network (HCN). The cascaded coupled microstrip line extends the bandwidth of the filter, and this filtering OMN has high bandpass selectivity and high out-of-band rejection, which improves the efficiency of the PA. For demonstration, a 10W GaN HEMT device is used to design and implement a PA. The measurement results indicate that the designed PA achieved an output power (Pout) of 38.7-42 dBm, a drain efficiency (DE) of 60.5%-74.1%, and a gain of 8.7-12 dB at 2.05-2.7 GHz.