Scattering from a periodic array of arbitrary shaped elements on a semiinfinite substrate

Kominami, Masanobu; Wakabayashi, Hitoshi; Sawa, Shinnosuke; Nakashima, Hiroshi

doi:10.1002/ecja.4410770109

Cited by 12 publications

(4 citation statements)

References 3 publications

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“…The frequency behavior of the FSS is entirely determined by the geometry of the surface in one period (unit cell), the size of the FSS, the way the surface is exposed to the electromagnetic wave (incidence angle of the incoming wave), They are various methods to analyze the periodic structures of the FSS such as the mutual impedance method, the method of moments (MoM) [7], the finite element method (FEM) [8], the finite-difference time-domain (FDTD) method and Equivalent Circuit (EC) method [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Characteristic impedance modelling of circular loop and square loop frequency selective surface (FSS) on hybrid material

Shukor

Aziz

Ahmad

et al. 2014

2014 International Symposium on Technology Management and Emerging Technologies

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An impedance modeling for a unit cell of the circular loop and square loop FSS structure is presented in this paper. The unit cell of the circular loop and square loop FSS are designed and simulated using the CST Microwave Studio software at 2.4 GHz based on industrial, scientific and medical bands (ISM). The design FSS structure consists of FSS structures placed on the FR4 and glass. The reflection (Sl1) and transmission (S21) of the design FSS structure is analyzed based on the six types of configuration that have been set up. The hybrid material (FR4 and glass) effect the transmission and reflection signal of the FSS. The highest efficiency for circular loop FSS and square loop FSS are 91.4% and 88.1% with a return loss of -25.31 dB and -18.72 dB by using configuration 1. The frequency response of the FSS is shifted to the lower part when the hybrid materials are used. So, the size of the FSS can be reduced by using hybrid materials to achieve the desired frequency response

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Section: Introductionmentioning

confidence: 99%

Characteristic impedance modelling of circular loop and square loop frequency selective surface (FSS) on hybrid material

Shukor

Aziz

Ahmad

et al. 2014

2014 International Symposium on Technology Management and Emerging Technologies

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“…Therefore, applications for numerical analysis methods are now available in this area. Finitedifference time-domain (FDTD) method [14], finite element method (FEM) [15], and method of moments (MoM) are used [16] for obtaining numerical solution methods in FSS geometry analyses.…”

Section: Introductionmentioning

confidence: 99%

A Novel Double-layer Low-profile Multiband Frequency Selective Surface for 4G Mobile Communication System

Balta

Kartal

2022

ACES Journal

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A novel double-layer multiband, low-profile frequency selective surface (FSS) for IMT-Advanced (4G) mobile communication system is presented in this article. On aspired to a minimum transmission coefficient of −10 dB for surface materials when the frequency bands targeted for blocking are stopped. For this project, we chose the dielectric substrate FR4 (loss-tangent = 0.02; dielectric constant = 4.54) and a thickness of 1 mm. Dodecagonal rings, upright bars, and square frame make up the FSS unit cell. The desired frequency responses of the FSS were intended to avoid being changed according to the angle of incidence of the electromagnetic waves. The FSS design is proposed as a symmetrical structure to make it polarization-independent and is aimed to stop 800, 900, 1800, 2100, and 2600 MHz frequencies to prevent harmful effects to human health and interference effects at these frequencies. With a cell size of 0.17λ, the planned FSS is quite small and, thus, has a low sensitivity at the angle of the incident wave. In addition, FSS geometry was manufactured by a printed circuit board (PCB) and measured in a non-reflective environment after being studied in Ansys high-frequency structure simulator (HFSS) software. By comparing the analysis and measurement results of the design, the success of the FSS to the frequencies to be stopped has been verified. The effect of each patch on different frequencies has been examined by drawing the surface current density graphs of the design.

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“…These induced currents then re-radiate EM waves from these conducting elements. Various methods for analyzing periodic structures have been developed with computational intensive approaches such as the mutual impedance method [1], the method of moments (MoM) [12], the finite element method (FEM) [13], the finite-difference time-domain (FDTD) method [4], and Equivalent Circuit (EC) method [4,[14][15][16][17]. Out of these, EC method was chosen as it is a simple and powerful technique.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Frequency Selective Surfaces for Radar Absorbing Materials

Singh¹,

Kumar²,

Meena³

et al. 2012

PIER B

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Abstract-Nowadays, applications of Frequency Selective Surfaces (FSS) for radar absorbing materials (RAM) are increasing, but it is still a challenge to select a proper FSS for a particular material as well as the dimensions of FSS for optimized absorption. Therefore, in this paper an attempt has been made to optimize the dimensions of FSS for microwave absorbing application using Genetic Algorithm (GA) approach. The considered frequency selective surfaces are composed of conducting patch elements pasted on the ferrite layer. FSS are used for filtration and microwave absorption. In this work, selection and optimization of FSS with radar absorbing material has been done for obtaining the maximum absorption at 8-12 GHz frequency. An equivalent circuit method has been used for the analysis of different FSS, which is further used to design fitness function of GA for optimizing the dimensions of FSS. Eight different available ferrite materials with frequency dependant permittivities and permeabilities have been used as material database. The GA optimization is proposed to select the proper material out of eight available materials with proper dimensions of FSS. The optimized results suggest the material from database and dimensions of FSS. The selected material is then mixed with epoxy and hardener, and coated over the aluminium sheet. Thereafter, all five FSS were fabricated on ferrite coated Al sheets using photolithographic method followed by wet etching. The absorption was measured for all FSS using absorption testing device (ATD) method at X-band. Absorption results showed that significant amount of absorption enhanced with the addition of proper FSS on radar absorbing coating.

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Scattering from a periodic array of arbitrary shaped elements on a semiinfinite substrate

Cited by 12 publications

References 3 publications

Characteristic impedance modelling of circular loop and square loop frequency selective surface (FSS) on hybrid material

Characteristic impedance modelling of circular loop and square loop frequency selective surface (FSS) on hybrid material

A Novel Double-layer Low-profile Multiband Frequency Selective Surface for 4G Mobile Communication System

Analysis of Frequency Selective Surfaces for Radar Absorbing Materials

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