Microwave and Optical Technology Letters · 2005 · 74 citations · 11 references
EngineeringElectrical EngineeringMicroelectronicsMicrowave EngineeringSemiconductor DevicesMicrostrip CircuitsMicrowave FiltersMicrowave Integrated CircuitsMicrowave ResonatorsMicrowave Semiconductor DevicesResonant CircuitsBand-pass FilteringBand-pass FiltersBandpass FiltersMicrostrip Bandstop FiltersMicrostrip FiltersMicrowave Filter DesignRing ResonatorsSplit-ring Resonators
In this paper, a compact and narrowband microstrip band-pass structure based on complementary split-ring resonators (CSRRs) etched in the back metal level (ground plane) is presented. Specifically, the structure is a two-stage CSRR-based device, where a series gap is etched in the output CSRR stage and two shunt stubs are added in the input cell. By these means we obtain a narrow and quite symmetric band-pass structure. A prototype device with 2% fractional bandwidth has been designed and fabricated for operation at the S-band. The dimensions of the device are as small as 14.6 × 11 mm, while high-frequency selectivity is achieved at both band edges due to the presence of two transmission zeros. To demonstrate the possibility to control the bandwidth over a narrow band, a wider (10% bandwidth) filter has been also designed and fabricated. These structures can be of interest for application in narrow band-pass filters where miniaturization and compatibility with planar technologies are key issues. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 508–512, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21031
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Composite Medium with Simultaneously Negative Permeability and Permittivity
David R. Smith, Willie J. Padilla, D. C. Vier et al. · Physical Review Letters · 2000 · 8.7K citations · Full text