NDLI: Novel Second-Order Dual-Mode Dual-Band Filters Using Capacitance Loaded Square Loop Resonator

Content Provider	IEEE Xplore Digital Library
Author	Sen Fu Bian Wu Jia Chen Shou-jia Sun Chang-hong Liang
Copyright Year	1963
Abstract	This paper presents a novel approach for designing dual-mode dual-band bandpass filters using capacitance loaded square loop resonators (CLSLR). The CLSLR features compactness and spurious response suppression because of the loaded capacitance. A dual-band response is obtained via an extremely large perturbation in a single resonator and second-order dual-mode dual-band filters are realized by a new cascading principle. Coupling coefficients between two resonators in both bands can be controlled independently and external quality factors are also controlled by a particularly-designed coplanar waveguide (CPW) feed line. Three types of filters are designed to validate the analysis. They are direct coupling dual-mode dual-band filter, source-load coupling dual-mode dual-band filter with a better band-to-band isolation and CPW-feed dual-mode dual-band filter with a wider bandwidth. Measured results show good agreement with the design specifications.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	477
Ending Page	483
Page Count	7
File Size	1673704
File Format	PDF
ISSN	00189480
Volume Number	60
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Couplings Dual band Resonator filters Band pass filters Microwave filters Passband Filtering theory square loop dual mode microstrip filter
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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