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A Quantitative Approach for Direct Synthesis of Bandpass Filters Composed of Transversal Resonators
Zai-Cheng Guo1; Lei Zhu1; Sai-Wai Wong2
2018-08-20
Source PublicationIEEE Transactions on Circuits and Systems II: Express Briefs
ISSN1549-7747
Abstract

This paper aims to propose a quantitative approach for direct synthesis of bandpass filters (BPFs) composed of a few transversal resonators. In conventional synthesis of these BPFs, coupling coefficients between input/output port and resonators are converted to external quality factor (Qe), ignoring inherent characteristics of resonators, such as impedance or reactance/susceptance slopes. As a result, the physical dimensions of resonators could only be determined qualitatively. In this work, a transversal lowpass prototype derived from coupling matrix is transformed into a bandpass circuit at first, then the coupling coefficients between input/output port and resonators in these BPFs are quantitatively derived as an accurate relationship between J inverter and susceptance slope of resonators instead. Hence, the physical dimensions of an entire BPF could be directly synthesized by solving the values of J inverters and susceptance slope in addition to the resonant frequency of resonators. In order to verify the theory, a proof-of-concept example using cross-shaped resonator (CSR) is designed and fabricated. The measured results are found in good agreement between the synthesized and simulated ones.

KeywordQuantitative Synthesis Transversal Resonator Susceptance Slope Bandpass Filter
DOIhttps://doi.org/10.1109/TCSII.2018.2866101
Indexed BySCI
Language英语
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Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorLei Zhu
Affiliation1.Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
2.College of Information Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060, PRC
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Zai-Cheng Guo,Lei Zhu,Sai-Wai Wong. A Quantitative Approach for Direct Synthesis of Bandpass Filters Composed of Transversal Resonators[J]. IEEE Transactions on Circuits and Systems II: Express Briefs,2018.
APA Zai-Cheng Guo,Lei Zhu,&Sai-Wai Wong.(2018).A Quantitative Approach for Direct Synthesis of Bandpass Filters Composed of Transversal Resonators.IEEE Transactions on Circuits and Systems II: Express Briefs.
MLA Zai-Cheng Guo,et al."A Quantitative Approach for Direct Synthesis of Bandpass Filters Composed of Transversal Resonators".IEEE Transactions on Circuits and Systems II: Express Briefs (2018).
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