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A novel tri-band filter using stub-loaded open loop ring resonators

✍ Scribed by Xin Lai; Bian Wu; Tao Su; Chang-Hong Liang

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
259 KB
Volume
52
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

In this article, a novel type of compact tri‐band filter using stub‐loaded open‐loop ring resonators (OLRRs) is presented.With the open stub loaded, the resonant frequency of the OLRR can be tuned by the tapped location and length of the loaded stub, which makes the OLRR more compact. Making use of the microstrip open‐ended feed line, proper external couplings are provided to each passband by magnetic coupling. A tri‐band filter centered at 2.0 GHz, 3.2 GHz, and 4.3 GHz is designed, fabricated and measured. Predicted results are verified by the experiments. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 523–526, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24971

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