Compact frequency selective surface with dual band response for WLAN applications

Abstract

In this article, the authors propose the use of conducting patches with slots to design frequency selective surfaces (FSS) with dual bandstop for wireless LAN (WLAN) applications. The simulated results were obtained with the computer program Ansoft Designer TM . A prototype of the designed FSS was built and its transmission characteristics were measured. Excellent agreement between simulated and measured results was obtained. The FSS was useful for rejecting signals from industrial, scientific, and medical and unlicensed national information infrastructure bands and it presented angular stability. V C 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:265-268, 2015; View this article online at wileyonlinelibrary.com.ABSTRACT: In this article, a novel coplanar waveguide (CPW)-fed triple-band antenna for WLAN/WiMAX is proposed. The proposed antenna is simply composed of three arc-shaped strips and is capable of generating three separate resonant modes with good impedance matching conditions. The effects of varying the dimension on the proposed antenna performance were also studied. Prototypes of the proposed antenna were constructed and experimentally studied. The experiment results show that the proposed antenna covers 1.66-2.71, 2.95-4.54, and 5.02-6.10 GHz with 210 dB return loss, covering all the 2.4/5.5/5.8 WLAN bands and 2.5/3.5/5.5 GHz bands. Furthermore, this CPW-fed monopole antenna exhibits a nearly omnidirectional radiation pattern in the H-plane and a dipole-like radiation pattern in the E-plane. Also, good antenna gains for operating bands were obtained. V C 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:268-273, 2015; View this article online at wileyonlinelibrary.com.

Reduction of wireless signals in indoor environments by using an active frequency selective wall based on spectrum sensing

“…2 Hence, research to improve the spectrum efficiency in indoor environments by using a frequency selective shielding (FSS) wall structure that either passes or reduces a specific frequency band is needed. 3,[8][9][10] Furthermore, an active research effort has been ongoing on spectrum efficiency control through the application of an active FSS (AFSS) wall structure in a building that can actively change the passing or reducing frequencies. Widely known areas of application that utilizes this electromagnetic property include radome in fighter jets and electromagnetic wave absorbent material.…”

“…3,4,[7][8][9][10][11][12][13][14] In recent years, research has been conducted to evaluate the signal performance indirectly by simulating the received signal strength, delay spread, and channel capacity to check whether the indoor wireless LAN communication performance can be improved. 3,4,[7][8][9][10][11][12][13][14] In recent years, research has been conducted to evaluate the signal performance indirectly by simulating the received signal strength, delay spread, and channel capacity to check whether the indoor wireless LAN communication performance can be improved.…”

“…6,7 Recently, research has been conducted on the application of FSS structures in walls and windows of a building for efficient use of signals in an indoor communication environment. 3,[8][9][10] Furthermore, an active research effort has been ongoing on spectrum efficiency control through the application of an active FSS (AFSS) wall structure in a building that can actively change the passing or reducing frequencies. [10][11][12][13][14] The most common method of changing the operating frequency of an AFSS wall structure is to use active components like PIN or varactor diodes.…”

Dual stopband frequency selective surface by using half rings and slots

“…A dual band FSS is built by cascading a metal loop shaped layer and its complementary in . Cascading two layers of conducting patches with slots to design dual bandstop FSS is used in . Left‐handed structures and capacitive grids are used to design dual band FSS in .…”

A Novel Simple Convoluted Geometry to Design Frequency Selective Surfaces for Applications at ISM and UNII Bands

“…In [9], the authors enhance their previous work and study the stability for both TE and TM polarized waves not only for normal incident wave but also for oblique incidence angles. In [10], the authors showed a project of cascading FSS to block the second and third ISM bands and UNII band. In [11], the authors proposed a compact FSS to reject 5 GHz band with angular stability for TE and TM modes of polarization.…”