Double-sided open split ring resonator for compact microstrip band-pass filter design
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SponsorsThe authors gratefully acknowledge Ministerio de Ciencias e Innovación of Spain for financial support of this work under the grant no.: TEC2010-21520-C04-04/TCM.
PublisherInstitution of Engineering and Technology
Bibliographic CitationDios Ruiz, J. de, and J. Hinojosa. “Double-Sided Open Split Ring Resonator for Compact Microstrip Band-Pass Filter Design.” IET Microwaves, Antennas&Propagation 6, no. 8 (June 7, 2012). doi:10.1049/iet-map.2011.0465.
A metamaterial structure, called the double-sided open split ring resonator (DOSRR), which combines two open split ring resonators (OSRRs) aligned over the opposite faces of the substrate in an inverted fashion is presented. A study of this resonator from full-wave electromagnetic and circuit simulations is performed. As with the OSRR cell, the DOSRR cell allows a series connection along a microstrip transmission line and it has a small electrical size. Moreover, the DOSRR cell has the ability to add a transmission zero in the out-of-band region without increasing its size. This DOSRR cell is used for the design of compact microstrip slow-wave type band-pass filters. Two strategies based on circular windows etched in the bottom plane instead of square windows and U-shape slots etched in the microstrip transmission line are designed to increase the stop band and to add extra zeros in order to suppress the spurious band. The experimental results have confirmed the possibilities of this ...
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