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A New Approach to Design Microstrip Wideband Balun Bandpass Filter
Cai C.2; Wang J.2; Zhu L.1; Wu W.2
2016-02-01
Source PublicationIEEE Microwave and Wireless Components Letters
ISSN15311309
Volume26Issue:2Pages:116-118
Abstract

A new design method of microstrip wideband balun bandpass filter (BPF) is presented in this letter. By utilizing the standing-wave property of voltage distribution along an open-circuited half-wavelength (λ/2) microstrip transmission line, the out-of-phase signals can be obtained at two output ports of a balun. Meanwhile, proper coupling topologies between the open-circuited λ/2 microstrip transmission line and the multi-mode resonators are selected to achieve a balun BPF with both characteristics of balance performance and wideband filtering properties. To validate our proposal, a balun BPF operating at 1 GHz with a 3 dB FBW of 30% is designed, fabricated, and measured. Both the simulation and measurement results of the designed balun BPF are provided with a good agreement. Results indicate that this balun BPF exhibits not only a high selectivity filtering performance with two common transmission zeros (Tzs) of S and S outside the passbands, but also a good balance performance with 0.5 dB amplitude imbalance and 5° phase imbalance.

KeywordBalun Bandpass Filter (Bpf) Multi-mode Resonator (Mmr) Standing-wave
DOI10.1109/LMWC.2016.2516760
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000370928000014
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Citation statistics
Cited Times [WOS]:15   [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
Cai C.,Wang J.,Zhu L.,et al. A New Approach to Design Microstrip Wideband Balun Bandpass Filter[J]. IEEE Microwave and Wireless Components Letters,2016,26(2):116-118.
APA Cai C.,Wang J.,Zhu L.,&Wu W..(2016).A New Approach to Design Microstrip Wideband Balun Bandpass Filter.IEEE Microwave and Wireless Components Letters,26(2),116-118.
MLA Cai C.,et al."A New Approach to Design Microstrip Wideband Balun Bandpass Filter".IEEE Microwave and Wireless Components Letters 26.2(2016):116-118.
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