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Complementary Split Ring Resonators (complementary + split_ring_resonator)

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Engineering100%

Selected Abstracts

Compact microstrip low-pass filter using complementary split ring resonators with ultra-wide stopband and high selectivity

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 2 2010
Hui-Yong Zeng
Abstract The transmission characteristic of the microstrip with complementary split ring resonator (CSRR) is researched. Compared with the conventional structure, this filter can achieve a wider bandgap by shifting the gap of CSRR from the side of the microstrip to the underside. And then, a lower transmission zero can be realized by loading a pair of narrow slots in the gap of the ring. The equivalent circuit model of the structure is provided. By cascading CSRR cells with different transmission zeros, a ultra-wide bandgap low-pass filter (LPF), which has a cutoff frequency at 4.3 GHz is designed. The designed LPF has a high performance with an insertion loss lower than 0.3 dB in pass band, a high out-band suppression more than 20 dB (4.55,25 GHz), and a very sharp transition band about 0.25 GHz (4.3,4.55 GHz). © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 430,433, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24942 [source]

Compact sharp cutoff wide stopband microstrip low-pass filter using complementary split ring resonator

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 11 2007
Santanu Dwari
Abstract A novel compact microstrip low-pass filter (LPF) is proposed using open circuit stubs and square patches alongwith complementary split ring resonator (CSRR). It exhibits wide stopband and sharp rejection. A demonstration LPF, having 3-dB cutoff frequency of 1.45 GHz, was fabricated and measured. Measured passband to stopband attenuation slope is more than 355 dB/GHz. Measured rejection greater than 20 dB extends over more than 13.75 times of the 3-dB cutoff frequency. Electrical length of the filter is less than 12% of the guided wavelength at 3-dB cutoff frequency. Experimental and simulated results agree well. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2865,2867, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22825 [source]

Compact microstrip low-pass filter using complementary split ring resonators with ultra-wide stopband and high selectivity

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 2 2010
Hui-Yong Zeng
Abstract The transmission characteristic of the microstrip with complementary split ring resonator (CSRR) is researched. Compared with the conventional structure, this filter can achieve a wider bandgap by shifting the gap of CSRR from the side of the microstrip to the underside. And then, a lower transmission zero can be realized by loading a pair of narrow slots in the gap of the ring. The equivalent circuit model of the structure is provided. By cascading CSRR cells with different transmission zeros, a ultra-wide bandgap low-pass filter (LPF), which has a cutoff frequency at 4.3 GHz is designed. The designed LPF has a high performance with an insertion loss lower than 0.3 dB in pass band, a high out-band suppression more than 20 dB (4.55,25 GHz), and a very sharp transition band about 0.25 GHz (4.3,4.55 GHz). © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 430,433, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24942 [source]

Composite right/left-handed transmission line based on Koch fractal shape slot in the ground and UWB filter application

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 9 2009
Jian An
Abstract A novel composite right/left-handed transmission line is presented which is synthesized by etching Koch fractal shape slot in the ground plane and series capacitive gap in the conductor strip. Unlike the structures loaded with complementary split ring resonators, the proposed structure can operate at very wideband and is used to design an ultra-wideband (UWB) filter. The UWB filter is fabricated and tested. The relative bandwidth of the ,10 dB return loss is 128% and the insertion loss is larger than ,1.5 dB except at high frequencies. The equivalent circuit model of the proposed structure is presented and the electrical parameters are also extracted. The circuit model results are compared with the simulation and measurement results which verify that not only the extracted parameters are exact but also the equivalent circuit model is reasonable. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2160,2163, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24553 [source]

Metamaterial transmission lines with tunable phase and characteristic impedance based on complementary split ring resonators

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 8 2009
Adolfo Vélez
Abstract In this article, resonant-type tunable metamaterial transmission lines with independent control over the electrical parameters of the line, that is, the electrical length and characteristic impedance, are presented for the first time. Tuning is achieved by loading a host microstrip line with varactor-loaded complementary split ring resonators (VLCSRRs) and varactor diodes. By locating the varactor diodes in series configuration with the line, outside the region occupied by the VLCSRRs, it is possible to control the characteristic impedance and the electrical length (phase shift), over a wide band. As an illustrative example, a tunable 35 ,/90° line functional between 0.4 and 0.8 GHz (which represents more than 65% tuning range), is presented and applied to the design of a transmission line power divider. The device is small and it exhibits reasonable performance. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1966,1970, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24480 [source]

Parametric analysis of microstrip lines loaded with complementary split ring resonators

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 8 2008
Jordi Bonache
Abstract In this article, the effects of varying the geometry of complementary split ring resonators (CSRRs) in microstrip lines loaded with such resonant elements is analyzed. Specifically, from a parameter extraction technique previously proposed by some of the authors, the electrical parameters of CSRR-loaded lines (namely, the line inductance, the inductance and capacitance of the CSRR, and the coupling capacitance between the line and the CSRRs), are inferred. This analysis is of interest because, in spite of the existence of analytical models that predict the electrical parameters of these CSRR-loaded lines, the validity of these models is limited, and the parameter extraction method is necessary to accurately determine the electrical parameters from geometry. From the analysis carried out in this work, interesting conclusions for the design of CSRR-loaded lines are obtained. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2093,2096, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23571 [source]

On the transmission properties of left-handed microstrip lines implemented by complementary split rings resonators

INTERNATIONAL JOURNAL OF NUMERICAL MODELLING: ELECTRONIC NETWORKS, DEVICES AND FIELDS, Issue 2 2006
M. Gil
Abstract In this paper, the transmission properties of left-handed microstrip lines implemented by etching complementary split rings resonators (CSRRs) and capacitive gaps in the ground plane and conductor strip, respectively, are investigated. To this end, we make use of the lumped element equivalent circuit model of the structure, from which an accurate analysis is carried out, and the influence of the main electrical parameters on the transmission properties is pointed out through electrical simulations. Aspects such as bandwidth and in-band ripple control are discussed in detail. The influence of the geometrical parameters is also discussed and interpreted to the light of the equivalent circuit model. From the results obtained, there are inferred design guidelines that are suitable for the design of metamaterial transmission lines subjected to specifications. Copyright © 2006 John Wiley & Sons, Ltd. [source]

A novel bandpass filter based on complementary split rings resonators and substrate integrated waveguide

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 3 2008
Wenquan Che
Abstract One novel bandpass filter implemented with combination of two different structures-complementary split rings resonators (CSRRs) and substrate integrated waveguide (SIW) is proposed in this article. Several CSRRs are etched on the surface of SIW to form the stopband with very sharp rejection. One prototype was fabricated, the measured results indicate 30% passband (at ,15 dB return loss), the rejection band ranges from 6.4 GHz to 7.8 GHz, about 20% bandwidth at ,20 dB rejection, the maximum rejection even reaches 50 dB. The rejection skirt is very sharp, only 18 MHz. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 699,701, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23182 [source]