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Capacitive Gaps (capacitive + gap)
Selected AbstractsComposite right/left-handed transmission line based on Koch fractal shape slot in the ground and UWB filter applicationMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 9 2009Jian 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] On the transmission properties of left-handed microstrip lines implemented by complementary split rings resonatorsINTERNATIONAL JOURNAL OF NUMERICAL MODELLING: ELECTRONIC NETWORKS, DEVICES AND FIELDS, Issue 2 2006M. 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] Novel microstrip backward coupler with metamaterial cells for fully planar fabrication techniquesMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 6 2006E. Jarauta Abstract By using a recently proposed approach to synthesize 1D metamaterials in planar circuit technology, compatible with fully planar fabrication techniques, a novel backward coupler has been designed and fabricated. It has been implemented in microstrip technology by means of complementary split-ring resonators (CSRRs), etched in the ground plane, and series capacitive gaps. This way, we obtain the necessary left-handed properties for reversing the forward coupling (typical of co-directional coupled-line couplers) into backward coupling. The simulation as well as measurement results confirm the enhanced properties of the proposed couplers. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1205,1209, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21579 [source] A dual-mode uniplanar bandpass filter using an inset-coupling structureMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 6 2004Adnan Görür Abstract A novel dual-mode uniplanar square slot-loop resonator, using an inset-coupling mechanism with capacitive gaps is proposed. The mode splitting of the uniplanar resonator is described with respect to the perturbation size. A dual-mode uniplanar filter using such a resonator is designed and fabricated with 5% bandwidth at the center frequency of 2.97 GHz for demonstration. The measured filter performance is presented. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 481,483, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20178 [source] | ||||||||||