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Study of a New Planar-Type Balun Topology for Application in the Design of Balun Bandpass Filters
Wang J.2; Huang F.2; Zhu L.1; Cai C.2; Wu W.2
2016-09-01
Source PublicationIEEE Transactions on Microwave Theory and Techniques
ISSN00189480
Volume64Issue:9Pages:2824-2832
Abstract

A comprehensive study of a new planar-type balun prototype is presented in this paper for application in the design of balun bandpass filters (BPFs) with widely used open-type resonators. The proposed balun is in general composed of two identical back-to-back quarter-wavelength (λ/4) coupled line sections. The design concept originates from the analysis of the standing wave pattern on a half-wavelength (λ/2) open-circuited transmission line. After an intuitive illustration is given, its working principle is presented to validate the feasibility of the proposed balun. Afterward, two types of the coupled line prototypes are analyzed to implement the proposed balun with filtering response, whereas a basic rule is given to realize the transmission zeros. To further demonstrate the validity of the proposed balun prototype, two practical balun BPFs with common dual-mode resonators are designed and fabricated. As expected, transmission zeros are generated near the desired passband of our presented balun filters, thereby improving their frequency selectivity. Both simulated and measured results exhibit good filtering and balun performance.

KeywordBalun Bandpass Filter (Bpf) Coupled Line Topology Open-type Resonator Planar-type Balun Standing Wave
DOI10.1109/TMTT.2016.2594257
URLView the original
Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000384146800012
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Citation statistics
Cited Times [WOS]:21   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Universidade de Macau
2.Nanjing University of Science and Technology
Recommended Citation
GB/T 7714
Wang J.,Huang F.,Zhu L.,et al. Study of a New Planar-Type Balun Topology for Application in the Design of Balun Bandpass Filters[J]. IEEE Transactions on Microwave Theory and Techniques,2016,64(9):2824-2832.
APA Wang J.,Huang F.,Zhu L.,Cai C.,&Wu W..(2016).Study of a New Planar-Type Balun Topology for Application in the Design of Balun Bandpass Filters.IEEE Transactions on Microwave Theory and Techniques,64(9),2824-2832.
MLA Wang J.,et al."Study of a New Planar-Type Balun Topology for Application in the Design of Balun Bandpass Filters".IEEE Transactions on Microwave Theory and Techniques 64.9(2016):2824-2832.
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