Band-Pass Filtering by Below-Cut-off Waveguides Loaded with Split-Ring Resonators: Relevance to Lefthandedness

Electromagnetic (EM) response of broadside coupled split-ring resonators (BC-SRRs) in standard waveguides is found to be affected by additional resonance-like field enhancement in the gaps between the resonators and the waveguide. This resonance-like response defines the dominant peak of EM transmis...

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Bibliographic Details
Published in2007 IEEE/MTT-S International Microwave Symposium pp. 1839 - 1842
Main Authors Semouchkina, E., Muduruni, S., Semouchkin, G., Mittra, R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2007
Subjects
Band pass filters
Double negative metamaterials
Electromagnetic coupling
Electromagnetic fields
Electromagnetic scattering
Electromagnetic waveguides
Filtering
Loaded waveguides
Magnetic resonance
resonance standing waves
Resonator filters
split ring resonators
Waveguide discontinuities
waveguides
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Summary:Electromagnetic (EM) response of broadside coupled split-ring resonators (BC-SRRs) in standard waveguides is found to be affected by additional resonance-like field enhancement in the gaps between the resonators and the waveguide. This resonance-like response defines the dominant peak of EM transmission below cut-off. FDTD simulations of experiments used to demonstrate subwavelength pass-band in waveguides loaded by a chain of BC-SRRs show that the net magnetic moment of the resonators is equal to zero in this band. Therefore, the response of the BC-SRRs cannot be characterized by effective negative permeability, and, hence, the subwavelength transmission can not be attributed to the double negativity of the medium.
ISBN:1424406870
9781424406876
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2007.380108