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Wideband filtering power amplifier based on terminated coupled line structure

Published online by Cambridge University Press:  13 February 2024

Guohua Liu Open the ORCID record for Guohua Liu [Opens in a new window] ,
Jianyuan Yu Open the ORCID record for Jianyuan Yu [Opens in a new window]  and
Yijun Lin
Guohua Liu*
Affiliation:
School of Electronic and Information Engineering, Hangzhou Dianzi University, Hangzhou, China
Jianyuan Yu
Affiliation:
School of Electronic and Information Engineering, Hangzhou Dianzi University, Hangzhou, China
Yijun Lin
Affiliation:
School of Electronic and Information Engineering, Hangzhou Dianzi University, Hangzhou, China
*
Corresponding author: Guohua Liu; Email: ghliu@hdu.edu.cn
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Abstract

This paper proposes a design method for designing a wideband filtering power amplifier (PA) based on terminated coupled line structure (TCLS). This method generates four transmission zeros and three transmission poles by loading stepped impedance resonator and short-circuit stubs on the four ports of TCLS, which greatly optimizes the in-band return loss and stopband suppression of the output matching network. In addition, the effective suppression of the second harmonic also increases the efficiency of the PA. In order to verify the effectiveness and superiority of this design method, a wideband bandpass filtering PA is designed and manufactured in 2.9–3.7 GHz. Measurement results show that the saturated output power is from 40.1 dBm to 41.2 dBm, the drain efficiency is greater than 60.3%, and the gain is 10–11.2 dB.

Keywords

bandpass filter (BPF)coupled line structureGaN HEMTpower amplifierwideband
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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