Dual-Mode Microstrip Open-Loop Resonators and Filters

A miniature dual-mode microstrip open-loop resonator is proposed. Distinct characteristics of this new type of dual-mode resonator are investigated using full-wave electromagnetic simulations. It is shown that the two operating modes, i.e., the even and odd modes, within a single dual-mode resonator...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2007-08, Vol.55 (8), p.1764-1770
Main Authors: Jian-Sheng Hong, Shaman, H., Young-Hoon Chun
Format: Article
Language:English
Subjects:
Applied sciences
Asymmetry
Band pass filters
Circuit properties
Circuit simulation
Couplings
Dual-mode resonators and filters
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filtering theory
Frequency filters
Joining
Microstrip filters
Microstrip resonators
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwave filters
Microwaves
Miniature
Oscillators, resonators, synthetizers
Resonance
Resonant frequency
Resonator filters
Resonators
Simulation
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Summary:A miniature dual-mode microstrip open-loop resonator is proposed. Distinct characteristics of this new type of dual-mode resonator are investigated using full-wave electromagnetic simulations. It is shown that the two operating modes, i.e., the even and odd modes, within a single dual-mode resonator of this type do not couple. It is also found that there is a finite-frequency transmission zero inherently associated with the even mode. Two two-pole filters using this type of dual-mode resonator are demonstrated with opposite asymmetric responses, which result from different locations of the transmission zero. Higher order filters of this type are also investigated. Both simulated and measured results are presented.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2007.901592