Waveguide Model for Thick Complementary Split Ring Resonators

This paper presents a very simple analytical model for the design of Frequency Selective Surfaces based on Complementary Split Ring Resonators (CSRR) within the microwave range. Simple expressions are provided for the most important geometrical parameters of the model, yielding an accurate description of the CSRR resonance frequency and avoiding full-wave numerical simulations. Besides, a qualitative description of the band-pass filter behavior of these structures is described, considering its high quality factor Q.Comment: Paper accepted at the 2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. paper submission #286

On the resonances and polarizabilities of split ring resonators

In this paper, the behavior at resonance of split ring resonators SRRs and other related topologies, such as the nonbianisotropic SRR and the broadside-coupled SRR, are studied. It is shown that these structures exhibit a fundamental resonant mode the quasistatic resonance and other higher-order modes which are related to dynamic processes. The excitation of these modes by means of a properly polarized time varying magnetic and/or electric fields is discussed on the basis of resonator symmetries. To verify the electromagnetic properties of these resonators, simulations based on resonance excitation by nonuniform and uniform external fields have been performed. Inspection of the currents at resonances, inferred from particle symmetries and full-wave electromagnetic simulations, allows us to predict the first-order dipolar moments induced at the different resonators and to develop a classification of the resonances based on this concept. The experimental data, obtained in SRR-loaded waveguides, are in agreement with the theory and point out the rich phenomenology associated with these planar resonant structures.MEC (España)-TEC2004-04249-C02-01 y TEC2004-04249-C02-02Comunidad Europea (programa Eureka)-2895 TELEMACAgencia de Subvenciones de la República Checa-102/03/044

Experimental results on metamaterial simulation using SRR-loaded waveguides

The recently proposed Split Ring Resonator (SRR) - loaded waveguide as a simulator of a left-handed medium (LHM) is extended to the simulation of negative magnetic permeability media (NMPM) and used for the study of wave propagation in these media. The experimental results are compared with those provided by the discrete metamaterial (LHM and NMPM) theory. Good qualitative and acceptable quantitative agreement has been found between theory and experiments.Ministerio de Ciencia y Tecnología TIC2MI-31

Characterization of miniaturized metamaterial resonators coupled to planar transmission lines through parameter extraction

In this paper, a method for obtaining the electrical characteristics of metamaterial resonators coupled to planar transmission lines is proposed. This parameter extraction technique is based on the comparison between the measured or full wave electromagnetic simulated transmission and reflection characteristics of a host line loaded with such resonators and those obtained from its lumped element equivalent circuit model previously reported by some of the authors. The resonant particles considered in this study are split ring resonators, spiral resonators, and other electrically small resonant particles based on two metal levels. The interest in this technique lies in the lack of analytical models providing the electrical parameters of several of the considered ultrasmall resonator topologies due to their complexity. From the extracted parameters, it is concluded that the circuit models predict very accurately the frequency responses of the considered structures for the different resonators under study. There is an increasing interest in the synthesis of metamaterial transmission lines with extremely small unit cell size. In order to achieve dimensions close to or even below g /100, it is imperative to use complex resonator topologies that combine broadside coupling and extremely elongated metallic strips etched in different metal levels connected through vias. This justifies the proposed technique. Thus, this work is useful in aiding the synthesis of microwave components based on resonant type metamaterial transmission lines.Ministerio de Educación y Ciencias de España-TEC2007-68013-C02 METAINNOVACentro de Innovación y Desarrollo de España-CIMITEC (UAB)-2005SGR0624Ministerio de Educación y Ciencias-(subvención FPU)-AP2005-452

Diseño, análisis y aplicaciones de metamateriales electromagnéticos

La pág. 54 está duplicada y falta la 68. Parece un error en la paginación.Premio Extraordinario de Doctorado U

Filtros y antenas de microondas y milimetricas basados en resonadores de anillos abiertos y en líneas de transmisión planares

Filtros y antenas de microondas y milimétricas basados en resonadores de anillos abiertos y en líneas de transmisión planares. Filtro para microondas y ondas milimétricas, que se caracteriza por el hecho de que comprende un medio de transmisión planar (1) que incluye una tira conductora (3), plano de masa metálico (4) y substrato dieléctrico (2) y por el hecho de que comprende por lo menos un resonador de anillos abiertos (5a, 5b, 5c, 5d, 5e y 5f)

Filtros planares para microondas y ondas milimétricas que contiene resonadores de anillos abiertos

Filtros planares para microondas y ondas milimétricas que contienen resonadores de anillos abiertos. Comprenden un medio de transmisión planar que incluye una tira conductora, plano de masa metálico y substrato dieléctrico. Se caracterizan por el hecho de que comprenden por lo menos una etapa consistente en un resonador de anillos abiertos, un elemento para el control del ancho de banda de tal etapa y un elemento de acoplamiento entre etapas. Se consigue realizar filtros de reducidas dimensiones, controlar el ancho de banda, controlar de forma efectiva el nivel de selectividad en la banda de transición superior y eliminar bandas espurias