Multi-Mode Bandpass Cavity Filters and Duplexer With Slot Mixed-Coupling Structure
Zheng, Bing-Long1; Wong, Sai-Wai2; Feng, Shi-Fen1; Zhu, Lei3; Yang, Yang4
Source PublicationIEEE ACCESS

The quasi-elliptic multi-mode bandpass cavity filters and duplexer with slot mixed-coupling structure are proposed in this paper. A single metal cavity embedded with a rectangular- shaped slot-cut metal plate is utilized to constitute a multi-mode bandpass filter with a few features including wide passband, low profile and controllable transmission zeros (TZs). In this paper, the slot-cut metal plane serves as the multi-mode resonators. In detail, the slot on the metal plane functions as the circuit element to move the higher order modes within the reasonable frequency-band, while serving as a mixed-coupling structure to generate out-of-band transmission zeros. To demonstrate the multiple-mode capability in filter design, the dual-mode, triple-mode, and quadruple-mode filters are developed by appropriately allocating a few TZs in the upper stopbands using the proposed slot mixed-coupling approach, namely, Type-I filters. Next, a quadruple-mode cavity filter with both lower and higher TZs is designed, namely, Type-II filter, which is further applied for the exploration of a duplexer. Finally, the filter and duplexer prototypes are fabricated and measured. The measurement results are found in good agreement with the simulated ones.

KeywordMulti-mode Cavity Filter Duplexer Mixed Coupling Controllable Transmission Zeros
URLView the original
Indexed BySCI
WOS Research AreaComputer Science ; Engineering ; Telecommunications
WOS SubjectComputer Science, Information Systems ; Engineering, Electrical & Electronic ; Telecommunications
WOS IDWOS:000430105400001
The Source to ArticleWOS
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Cited Times [WOS]:11   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorWong, Sai-Wai
Affiliation1.School of Electronic and Information Engineering, South China University of Technology, Guangzhou City 510640, China
2.College of Information Engineering, Shenzhen University, Shenzhen 518060, China
3.Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Zhuhai 999078, China
4.School of Electrical and Data Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Recommended Citation
GB/T 7714
Zheng, Bing-Long,Wong, Sai-Wai,Feng, Shi-Fen,et al. Multi-Mode Bandpass Cavity Filters and Duplexer With Slot Mixed-Coupling Structure[J]. IEEE ACCESS,2018,6:16353-16362.
APA Zheng, Bing-Long,Wong, Sai-Wai,Feng, Shi-Fen,Zhu, Lei,&Yang, Yang.(2018).Multi-Mode Bandpass Cavity Filters and Duplexer With Slot Mixed-Coupling Structure.IEEE ACCESS,6,16353-16362.
MLA Zheng, Bing-Long,et al."Multi-Mode Bandpass Cavity Filters and Duplexer With Slot Mixed-Coupling Structure".IEEE ACCESS 6(2018):16353-16362.
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