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A New Synthesis and Design Method for Wideband Bandpass Filters With Generalized Unit Elements
Zhang, Runqi1; Luo, Sha1; Zhu, Lei2
2017-03
Source PublicationIEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
ISSN0018-9480
Volume65Issue:3Pages:815-823
Abstract

A new synthesis and design method for wideband bandpass filters has been proposed using the concept of generalized unit elements (GUEs). The synthesis starts with a lumped-element LC circuit, which is obtained by some well-known circuits and classic methods, such as the ladder-type circuit and the coupling matrix method. A GUE is an equivalent circuit, which is represented by either a coupled LC circuit or a section of the transmission line coupled by stubs. In this view, an LC circuit is transformed into the transmission line circuit directly via a general network of a GUE. This contributes to the key idea behind the synthesis procedure. Detailed analysis on the GUE and its equivalent circuits are discussed in terms of the equivalent characteristic impedance and the extended Richard's transformation. Based on these two variables, frequency and constant mapping functions are proposed to explicitly obtain characteristic impedances in the transmission line circuit. In the final part, three prototype filters, namely, the classic Chebyshev ladder-type filter, the general box-shaped Chebyshev filter of symmetrical filtering responses, and the cascaded trisection filter in an asymmetrical transmission zero distribution are designed and fabricated, respectively. All the experimental results agree well with the predicted ones and thus it verifies the proposed synthesis and design method.

KeywordCoupling Matrix Filter Synthesis And widebAnd bAndpass Filters (Bpfs) Generalized Unit Elements (Gues)
DOI10.1109/TMTT.2016.2636825
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000396393000014
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:7   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576
2.Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau, China
Recommended Citation
GB/T 7714
Zhang, Runqi,Luo, Sha,Zhu, Lei. A New Synthesis and Design Method for Wideband Bandpass Filters With Generalized Unit Elements[J]. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES,2017,65(3):815-823.
APA Zhang, Runqi,Luo, Sha,&Zhu, Lei.(2017).A New Synthesis and Design Method for Wideband Bandpass Filters With Generalized Unit Elements.IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES,65(3),815-823.
MLA Zhang, Runqi,et al."A New Synthesis and Design Method for Wideband Bandpass Filters With Generalized Unit Elements".IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 65.3(2017):815-823.
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