Double Layer Frequency Selective Surface for Ultra Wide Band Applications with Angular Stability and Polarization Independence

Segundo, Francisco C. G. da Silva; Campos, Antonio Luiz P. S.; Gomes, Alfredo; Alencar, Marina de Oliveira

doi:10.1590/2179-10742019v18i31696

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Journal of Microwaves, Optoelectronics and Electromagnetic Applications

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Article • J. Microw. Optoelectron. Electromagn. Appl. 18 (3) • Sept 2019 • https://doi.org/10.1590/2179-10742019v18i31696 copy

Double Layer Frequency Selective Surface for Ultra Wide Band Applications with Angular Stability and Polarization Independence

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

In this paper, a double layer stopband Frequency Selective Surface (FSS) for Ultra-Wide Band (UWB) applications is presented. The proposed FSS consists of two cascaded conventional FSS, one with double square loops and other with square loops. The − 10dB frequency band from 3.00 GHz to 11.64 GHz is achieved, with a fractional bandwidth of 149 %. Effects of angular stability and polarization independence over the frequency response are investigated and conclusions are presented. In order to show transmission performance, the FSS was simulated by ANSYS HFSS. The FSS shows angular stability and polarization independence in entire UWB band (3.10 – 10.60 GHz). A prototype was built and measurements were performed. A good agreement between simulated and measured results was observed.

Index Terms
FSS; UWB response; Angular stability; Polarization independence

Square Loop FSS
Periodicity (p)	5; 10; 15; 20
Length (d)	3.5; 6; 7.5; 10; 13; 18
Width (w)	0.1; 0.15; 0.2; 0.25; 0.3; 0.35; 0.4; 0.45; 0.5; 0.6; 0.8; 1; 1.5; 2; 2.5; 3; 3.5; 4; 4.5; 5
Thickness (h)	0.8; 1.2; 1.6

Double Square Loop FSS
Parameters	Values (mm)
Periodicity (p)	5; 10; 12; 15; 16; 20.
Length (d₁)	4.5; 7; 7.5; 8; 9; 9.6; 10.2; 11.5; 12; 13; 15; 1.
Width (w₁)	0.1; 0.15; 0.2; 0.25; 0.3; 0.35; 0.4; 0.5; 0.6; 1; 1.5; 2; 2.5; 3.
Length (d₂)	2,5; 5; 6,5; 7; 7,2; 8; 9; 12; 15;
Width (w₂)	0.1; 0.15; 0.2; 0.25; 0.3; 0.35; 0.4; 0.5; 0.6; 1; 1.5; 2; 2.5; 3; 3.5; 4
Thickness (h)	0.8; 1.2; 1.6.

Square Loop Design (FSS 2)
Input Parameters
fr		BW
5.8 GHz		3.0 GHz
Output Parameters
h	p	D	W
1.2 mm	12.6749 mm	11.0918 mm	1.2874 mm

Double Square Loop Design (FSS 1)
Input Parameters
fr ₁		BW ₁	fr ₂		BW ₂
3.0 GHz		1.5 GHz	9.0 GHz		3.0 GHz
Output Parameters
h	P	d ₁	d ₂	w ₁	w ₂
1.2 mm	12.6749 mm	12.1712 mm	8.4438 mm	0.4268 mm	1.1075 mm

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