Software for project and analysis of frequency selective surfaces

Abstract

Abstract-In this paper, a software for design and analysis of frequency selective surfaces (FSS) based on the equivalent circuit model is presented, with emphasis on teaching students in the interaction between FSS parameters. Tools to design FSSs and a tutorial with theoretical elements of the equivalent circuit method, applied to FSS, compose this software. The software can be used at FSS analysis and design course to consolidate the first theoretical and illustrated concepts.Index Terms -Frequency selective surfaces, equivalent circuit method, interactive computing, simulation software.I. INTRODUCTION Since the invention of the electronic computer there are two divergent opinions to show how this device should be used. One group saw the computer's principal use as a number manipulator: an extensive, ultrafast, and accurate calculator. A second group envisioned the computer as a symbol manipulator that might be taught to use logic and make decisions in a human fashion [1].Frequency selective surfaces (FSS) are periodic structures in two dimensions that can provide frequency filtering to incoming electromagnetic waves. Traditional FSS structures have been investigated over the years for a variety of applications (e.g., frequency filters or diplexers in high performance reflector antenna systems, advanced radome designs, and smart surfaces for stealth applications) [2].The analysis and design of FSS, and the calculation of their parameters, is inherently multidisciplinary, demanding knowledge of antenna, electromagnetic theory and FSS analysis and design disciplines. For example, when a parameter is modified in a FSS, this modification has some electromagnetic consequences, and hence also affects the frequency filtering.In recent years, a number of electromagnetic simulation commercial software have appeared on the market, such as CST Microwave Studio , and also a number of pedagogical software has been developed [3][4][5][6][7][8][9]. The main goal of such software is to avoid the tedious computation of the equations governing FSS theory.In this paper, pedagogical software that emphasizes the understanding of the FSS parameters, using equivalent circuit model, is presented. The outline of the paper is as follows: in Section II, a brief Av. Sen. Salgado Filho, 3000, Brazil, antonio.luiz@pq.cnpq.br and adaildo@ct.ufrn.br Robson H. C. Maniçoba and Lincoln M. AraújoFederal University of Rio Grande do Norte, Department of Electrical Engineering, Av. Sen. Salgado Filho, 3000, Natal -RN, Brazil, 59072-970, robsonhcm@gmail.com and machado.lincoln@gmail.com Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol. 11, No.1, June 2012 Brazilian II. FSS FUNDAMENTALSA periodic array consisting of conducting patch or aperture elements is known as a frequency selective surface (FSS), or dichroic. FSS may have low-pass or high-pass spectral behavior, depending on the array element type (i.e., patch or aperture), similarly to the frequency filters in traditional radio-frequency (RF) [10]. A Tw...

A Comparative Study of Two Numerical Techniques To Analyze Double Screen Frequency Selective Surface

“…These admittances are obtained by switching off one of the current sources for each case, that is, and are obtained turn off the current source number 2, in an analog way, for the admittances and are obtained turn off the current source number 1. A complete description of the theoretical analysis using the spectral domain technique can be seen in .…”

A New Trapezium FSS Superstrate for Antenna Gain Enhancement

“…An FSS can be defined as a periodic arrangement of conductors or apertures, capable of filtering certain frequencies [2]. Recently, FSS is being used to modify the microstrip antennas parameters, such as the gain and radiation pattern.…”

Minkowski Island Fractal Patch Antenna With Different Size of Complimentary Quadruple P-Spiral SRR (Qps-Srr) Structures for Broadband Applications

“…This structure had been use in several antenna designs such as in [5][6]. Beside antenna, this Minkowski Island structure are also founded in the reflectarray antenna [7], RF filter design [8] and frequency selective surface design [9].…”