A novel microstrip square-loop dual-mode bandpass filter with simultaneous size reduction and spurious response suppression
Si-Weng Fok; Pedro Cheong; Kam-Weng Tam; Rui P. Martins
2006
Source PublicationIEEE Transactions on Microwave Theory and Techniques
ISSN0018-9480
Volume54Issue:5Pages:2033 - 2041
Abstract

In this paper, a new capacitively stepped-impedance resonator (CSIR) is proposed to develop the microstrip squareloop dual-mode bandpass filter. Using this new design, simultaneous size reduction and spurious response suppression for the dual-mode bandpass filter can be achieved. An analytical formulation of this novel resonator is given in order to elucidate the spurious frequencies relocation design. Together with this formulation, a generalized dual-mode bandpass filter model is developed so as to ease the analysis of transmission zero and insertion loss. A prototype filter is designed at 900 MHz with 1.5% fractional bandwidth. Significant spurious suppressions up to 33 and 35 dB are measured at 1.8 and at 2.7 GHz, respectively. A circuitry size reduction of 54% is achieved when compared with that of the conventional structure. Moreover, the CSIR allows frequency tuning and, thus, a varactor-tuned filter is designed and a measured tunable center frequency between 1.5-1.62 GHz is demonstrated. Utilizing the proposed structure, not only size reduction, as well as spurious response suppression, but also center frequency tuning can be achieved. © 2006 IEEE.

KeywordDual-mode Resonator Insertion Loss Size Reduction Spurious Response Suppression
DOIhttp://doi.org/10.1109/TMTT.2006.873626
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000237602700013
The Source to ArticleScopus
Fulltext Access
Citation statistics
Cited Times [WOS]:47   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorKam-Weng Tam
AffiliationWireless Communication Laboratory, University of Macau, Taipa, Macao SAR, China
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Si-Weng Fok,Pedro Cheong,Kam-Weng Tam,et al. A novel microstrip square-loop dual-mode bandpass filter with simultaneous size reduction and spurious response suppression[J]. IEEE Transactions on Microwave Theory and Techniques,2006,54(5):2033 - 2041.
APA Si-Weng Fok,Pedro Cheong,Kam-Weng Tam,&Rui P. Martins.(2006).A novel microstrip square-loop dual-mode bandpass filter with simultaneous size reduction and spurious response suppression.IEEE Transactions on Microwave Theory and Techniques,54(5),2033 - 2041.
MLA Si-Weng Fok,et al."A novel microstrip square-loop dual-mode bandpass filter with simultaneous size reduction and spurious response suppression".IEEE Transactions on Microwave Theory and Techniques 54.5(2006):2033 - 2041.
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