Particle Swarm Optimization of Frequency Selective Surfaces for the Design of Artificial Magnetic Conductors

2006 ◽  
Author(s):  
S. Genovesi ◽  
R. Mittra ◽  
A. Monorchio ◽  
G. Manara
Keyword(s):  
Particle Swarm Optimization ◽  
Particle Swarm ◽  
Frequency Selective Surfaces ◽  
Swarm Optimization ◽  
Artificial Magnetic Conductors ◽  
Frequency Selective

scholarly journals Optimierung von FSS-Bandpassfiltern mit Hilfe der Schwarmintelligenz (Particle Swarm Optimization)

2006 ◽  
Vol 4 ◽  
pp. 65-71 ◽  
Author(s):  
G. Wu ◽  
V. Hansen ◽  
E. Kreysa ◽  
H.-P. Gemünd
Keyword(s):  
Particle Swarm Optimization ◽  
Particle Swarm ◽  
Optimization Procedure ◽  
Optimization Method ◽  
Frequency Selective Surfaces ◽  
Transmission Characteristics ◽  
Complete Structure ◽  
Swarm Optimization ◽  
Band Pass ◽  
Linear Problems

Abstract. In diesem Beitrag wird ein neues Verfahren zur Optimierung von Bandpassfiltern aus mehrlagigen frequenzselektiven Schirmen (FSS), die in ein Dielektrikum eingebettet sind, vorgestellt. Das Ziel ist es, die Parameter der gesamten Struktur so zu optimieren, dass ihre Transmissionseigenschaften hohe Filteranforderungen erfüllen. Als Optimierungsverfahren wird die Particle Swarm Optimization (PSO) eingesetzt. PSO ist eine neue stochastische Optimierungsmethode, die in verschieden Gebieten, besonders aber bei der Optimierung nicht linearer Probleme mit mehreren Zielfunktionen erfolgreich eingesetzt wird. In dieser Arbeit wird die PSO in die Spektralbereichsanalyse zur Berechnung komplexer FSS-Strukturen integriert. Die numerische Berechnung basiert auf einer Integralgleichungsformulierung mit Hilfe der spektralen Greenschen Funktion für geschichtete Strukturen. This paper presents a novel procedure for the optimization of band-pass filters consisting of frequency selective surfaces (FSS) embedded in a dielectric. The aim is to optimize the parameters of the complete structure so that the transmission characteristics of the filters fulfill the demanding requirements. The Particle Swarm Optimization (PSO) is used as the optimization procedure. PSO is a new stochastic optimization method that is successfully applied in different areas for the optimization of non-linear problems with several object-functions. In this work, PSO is integrated into the spectral domain analysis for the calculation of the complex FSS structures. The numerical computation is based on the formulation of an integral equation with the help of the spectral Green's function for layered media.

Particle swarm optimization for the design of square loop frequency selective surfaces considering a model of dielectric effective permittivity

2016 ◽  
Vol 35 (5) ◽  
pp. 1643-1655 ◽  
Author(s):  
Mario A. Rodriguez Barrera ◽  
Walter Pereira Carpes Jr
Keyword(s):  
Particle Swarm Optimization ◽  
Design Process ◽  
Effective Permittivity ◽  
Particle Swarm ◽  
Search Space ◽  
Geometric Parameters ◽  
Swarm Optimization ◽  
Dielectric Thickness ◽  
Content Type ◽  
Frequency Selective

Purpose The purpose of this paper is to present the results of a particle swarm optimization (PSO) method applied in the design of a square-loop frequency selective surface (FSS) via the equivalent circuit model (ECM), considering the dielectric effective permittivity as a variable in the optimization problem. Design/methodology/approach In the optimization process considered, besides the FSS square loop geometric parameters, the thickness and relative permittivity of dielectric material used as support are included as variables in the search space, using for this a model of dielectric effective permittivity introduced by the authors in a previous work. Findings Square loops were designed and the obtained results were compared with designs reported in literature for applications in wireless local area network and long-term evolution 4G systems. The low computational cost is remarkable as well as the acceptable accuracy obtained with the proposed approach. The PSO method results were implemented with the ECM and compared with those obtained via Ansys – high frequency structure simulator commercial software simulations. Originality/value The lack of a model of dielectric effective permittivity for the ECM causes a restricted search space in the stochastic FSS design process limited to only geometric parameters, as it is reported in the available literature. The proposed approach simplifies and makes more flexible the design process, and allows guiding the FSS design to unit cell surface and/or dielectric thickness of small dimensions.

Sign in / Sign up

Export Citation Format

Share Document