Synthesis of split-rings-based artificial transmission lines through a new two-step, fast converging, and robust aggressive space mapping (ASM) algorithm

Abstract

© 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.This paper is focused on the synthesis of artificial transmission lines based on complementary split ring resonators (CSRRs). The considered structures are microstrip lines with CSRRs etched in the ground plane and microstrip lines loaded with both CSRRs and series capacitive gaps. An aggressive space mapping (ASM) optimization algorithm, able to automatically generate the layout of these arti ficial lines, has been developed.The tool has been optimized in order to achieve fast convergence and to provide accurate results. The main relevant aspects of the proposed algorithm (based on a n ovel two-step ASM optimization approach) are: 1) the capability to provide the implementable circuit elements of the equivalent circuit model of the considered artificial lines and 2) the ability to converge in a few (unprecedented) iteration steps, due to a new procedure to generate the initial layouts (which are very close to the final ones). First, the software is tested through the synthesis of several CSRR-based microstrip lines, and then some practical application examples of such artificial lines are reported to illustrate the potential of the proposed synthesis tool.This work was supported in part by MICIIN-Spain under Project TEC2010-17512 METATRANSFER, Project TEC2010-21520-C04-01, Project CONSOLIDER EMET CSD2008-00066, and Grant AP2008-04707, Generalitat de Catalunya under Project 2009SGR-421, and MITyC-Spain under Project TSI-020100-2010-169 METASINTESIS.Selga, J.; Rodríguez Pérez, AM.; Boria Esbert, VE.; Martín, F. (2013). Synthesis of split-rings-based artificial transmission lines through a new two-step, fast converging, and robust aggressive space mapping (ASM) algorithm. IEEE Transactions on Microwave Theory and Techniques. 61(6):2295-2308. https://doi.org/10.1109/TMTT.2013.2259254S2295230861