Miniaturized Wideband Bandpass Filter based on Capacitor-loaded One-eighth Wavelength Coupled Line

Authors

  • Jin Shi School of Information Science and Technology Nantong University, Nantong, 226019, China ,2 Nantong Research Institute for Advanced Communication Technologies Nantong, 226019, China 3 Research Center for Intelligent Information Technology Nantong University, Nantong, 226019, China
  • Jiancheng Dong School of Information Science and Technology Nantong University, Nantong, 226019, China
  • Kai Xu School of Information Science and Technology Nantong University, Nantong, 226019, China, 2 Nantong Research Institute for Advanced Communication Technologies Nantong, 226019, China 3 Research Center for Intelligent Information Technology Nantong University, Nantong, 226019, China
  • Lingyan Zhang School of Information Science and Technology Nantong University, Nantong, 226019, China , 2 Nantong Research Institute for Advanced Communication Technologies Nantong, 226019, China 3 Research Center for Intelligent Information Technology Nantong University, Nantong, 226019, China

Keywords:

Bandpass filter, capacitors, coupled line, miniaturized, wideband

Abstract

A novel miniaturized wideband bandpass filter (BPF) using capacitor-loaded microstrip coupled line is proposed. The capacitors are loaded in parallel and series to the coupled line, which makes the filter just require one one-eighth wavelength coupled line and achieve filtering response with multiple transmission poles (TPs) and transmission zeros (TZs). Compared with the state-of-the-art microstrip wideband BPFs, the proposed filter has the advantages of compact size and simple structure. A prototype centered at 1.47 GHz with the 3-dB fractional bandwidth of 86.5% is demonstrated, which exhibits the compact size of 0.003λ2/g (λg is the guided wavelength at the center frequency) and the minimum insertion loss of 0.37 dB.

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Author Biographies

Jin Shi, School of Information Science and Technology Nantong University, Nantong, 226019, China ,2 Nantong Research Institute for Advanced Communication Technologies Nantong, 226019, China 3 Research Center for Intelligent Information Technology Nantong University, Nantong, 226019, China

Jin Shi (M'14) received the B.S. degree from HuaiYin Teachers College, Huai’an City, Jiangsu Province, China, in 2001, the M.S. degree from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2004, and the Ph.D. degree from City University of Hong Kong, in 2011, respectively. From 2004 to 2006, he was a Research Engineer in Comba working on RF repeater system. During 2007– 2008, he was a Research Assistant of the City University of Hong Kong. He joined the Institute for Infocomm Research, Singapore, as a Research Fellow and later served as a Scientist from 2011 to 2013. In 2013, he joined the School of Electronics and Information, Nantong University, China, as a Professor. His current research interests are RF/microwave components and subsystems, differential circuit and antennas, LTCC circuits and antennas. Shi is the recipient of the IES Prestigious Engineering Achievement Award 2013. He has served as the TPC member and session chair for a number of conferences and a regular reviewer for the IEEE Transactions on Microwave Theory and Techniques, the MWCL, the AWPL, and Electronics Letters, and other publications.

Jiancheng Dong, School of Information Science and Technology Nantong University, Nantong, 226019, China

Jiancheng Dong was born in Lianyungang, Jiangsu Province, China, in 1994. He received the B.Sc. degree from Nantong University, Nantong, Jiangsu Province, China, in 2018, where he is currently pursuing the M.S. degree in Electromagnetic Field and Microwave Technology.
His current research interests include RF/ microwave components, differential microwave circuits, and tunable circuits.

Kai Xu, School of Information Science and Technology Nantong University, Nantong, 226019, China, 2 Nantong Research Institute for Advanced Communication Technologies Nantong, 226019, China 3 Research Center for Intelligent Information Technology Nantong University, Nantong, 226019, China

Kai Xu (M’19) was born in Haian, Jiangsu Province, China, in 1991. He received the B.Sc. degree from Taizhou Institute of Sci. and Tech., Jiangsu Province, China, in 2013, the M.S. degree from the Nantong University, Nantong, Jiangsu Province, China, in 2016, and the Ph.D. degree from the Nantong University, Nantong, Jiangsu Province, China, in 2019, respectively.
From 2015 to 2016, he was a Research Assistant of the Institute for Infocomm Research, Singapore. His current research interests include microwave components, balanced microwave circuits, antennas, and integrated designs.
He has served as a Reviewer for the IEEE access, IEEE MWCL, and IET Electronic Letters, and other publications.

Lingyan Zhang, School of Information Science and Technology Nantong University, Nantong, 226019, China , 2 Nantong Research Institute for Advanced Communication Technologies Nantong, 226019, China 3 Research Center for Intelligent Information Technology Nantong University, Nantong, 226019, China

Lingyan Zhang was born in Jiangsu, China in 1991. She received her B.Sc. degree in Applied Physics from Jiangsu University in 2014 and Ph.D. degree in Materials Science and Engineering from Nanjing University of Science and Technology in 2019.
Her research focuses on the microwave transmission system, interaction of ultrafast intense laser with semiconductors and the surface modification of materials.

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Published

2021-10-31

How to Cite

[1]
J. . Shi, J. . Dong, K. . Xu, and L. . Zhang, “Miniaturized Wideband Bandpass Filter based on Capacitor-loaded One-eighth Wavelength Coupled Line”, ACES Journal, vol. 36, no. 07, pp. 865–871, Oct. 2021.

Issue

2021: Vol 36 Iss 7

Section

Articles