DocumentCode :
2944628
Title :
Multilayer FSS Optimizer based on PSO and CG-FFT
Author :
Gutiérrez, A.L. ; Lanza, M. ; Barriuso, I. ; Valle, L. ; Domingo, M. ; Pérez, J.R. ; Basterrechea, J.
Author_Institution :
Dipt. Ing. de Comun., Univ. de Cantabria, Santander, Spain
fYear :
2011
fDate :
3-8 July 2011
Firstpage :
2661
Lastpage :
2664
Abstract :
Traditionally, Frequency Selective Surfaces (FSS) are designed to produce a certain spectral response, in one or more frequency bands, using a methodology that manually tunes and simulates the behavior of the structure. In some cases, due to the high filtering requirements of an application, it could be necessary make FSS with several periodic surfaces, in order to improve the frequency response of the final prototype. This process is difficult to be carried out if the filtering response to synthesize cannot be directly obtained with a combination of classical FSS unit cell geometries. To overcome this problem, in this paper a methodology of optimization that automates the hard and costly search is introduced, combining the PSO and an analysis methodology of structures with several periodic surfaces that act as the cost function: the Conjugate Gradient Fast Fourier Transform (CG-FFT). This approximation uses a multilayer Green function calculated applying the transmission line model that considers the mutual coupling effects by translating the field from the source FSS to the other periodic surfaces. Representative results including the optimization of a three layer FSS with two planar periodic surfaces are reported and discussed in order to show the usefulness of the approach proposed.
Keywords :
Green´s function methods; computational electromagnetics; conjugate gradient methods; fast Fourier transforms; frequency response; frequency selective surfaces; particle swarm optimisation; CG-FFT; PSO; classical FSS unit cell geometries; conjugate gradient fast Fourier transform; filtering response; frequency bands; frequency response; frequency selective surfaces; high filtering requirements; multilayer FSS optimizer; multilayer Green function; mutual coupling effects; planar periodic surfaces; spectral response; transmission line model; Dielectrics; Frequency selective surfaces; Geometry; Nonhomogeneous media; Optimization; Periodic structures; Reflection; CG-FFT; FSS; Multilayer; Optimization; PSO;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on
Conference_Location :
Spokane, WA
ISSN :
1522-3965
Print_ISBN :
978-1-4244-9562-7
Type :
conf
DOI :
10.1109/APS.2011.5997072
Filename :
5997072
Link To Document :
بازگشت