Journal ArticleDOI
A Miniaturized Dual-Band FSS With Stable Resonance Frequencies of 2.4 GHz/5 GHz for WLAN Applications
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TLDR
In this article, an anchor-shaped loop unit-cell structure for compact frequency selective surfaces (FSSs) with dual-bandstop behavior in two wireless local area network (WLAN) frequencies 2.4 and 5.0 GHz is proposed.Abstract:
In this letter, we propose an anchor-shaped loop unit-cell structure for compact frequency selective surfaces (FSSs) with dual-bandstop behavior in two wireless local area network (WLAN) frequencies 2.4 and 5.0 GHz. The proposed FSS possesses 230- and 300-MHz bandwidths with insertion loss less than ${-}$ 20 dB around the two central operating frequencies 2.4 and 5.0 GHz, respectively. In addition, the FSS exhibits excellent miniaturization with 0.065 $\lambda \times 0.076 \lambda$ unit cells, where $\lambda$ represents the free-space wavelength. Furthermore, the unit-cell structure provides a stable performance for both TE- and TM- polarizations under incident angles 0 $^{\circ}$ –60 $^{\circ}$ . A prototype of the proposed FSS is fabricated and measured. Good agreement between the simulated and measured results is obtained.read more
Citations
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Journal ArticleDOI
Progress in frequency selective surface-based smart electromagnetic structures: A critical review
Ravi Panwar,Jung-Ryul Lee +1 more
TL;DR: In this article, a review of recent developments in the field of frequency selective surface (FSS)-based advanced electromagnetic (EM) structures is presented, which is a type of filter consisting of an array of periodic metallic patches or apertures on a dielectric substrate.
Journal ArticleDOI
Broadband Polarization-Insensitive Tunable Frequency Selective Surface for Wideband Shielding
TL;DR: In this paper, a low-profile broadband frequency selective surface (FSS) is presented for wideband shielding, which consists of periodic patterns of circular loops connected among themselves through varactor diodes, which exhibit tunable operation.
Journal ArticleDOI
A Miniaturized Flexible Frequency Selective Surface for X-Band Applications
TL;DR: In this article, a band-stop frequency selective surface (FSS) is proposed to provide effective shielding in X-band, with attenuation of at least 56 dB, and the proposed FSS provides 3-dB fractional bandwidth of 48% which is necessary to cover Xband.
Journal ArticleDOI
Design and Optimization of 3-D Frequency-Selective Surfaces Based on a Multiobjective Lazy Ant Colony Optimization Algorithm
TL;DR: It will be shown that the MOLACO algorithm generates several innovative and unintuitive unit cell geometries with a single-zero, single-pole response, less than 1% shift from center frequencies and 3 dB transmission bandwidths between 6%–12% for angles of incidence up to 80° in TE and TM polarizations.
Journal ArticleDOI
An Angularly Stable Dual-Band FSS With Closely Spaced Resonances Using Miniaturized Unit Cell
TL;DR: In this paper, a dual-band frequency selective surface (FSS) with closely spaced resonance is presented, which comprises of meander lines printed on a single-layer dielectric substrate to provide dual stopband characteristic.
References
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Book
Frequency Selective Surfaces: Theory and Design
TL;DR: In this article, the authors present a comparison of band-pass and Dichroic filter designs for one and two-dimensional periodic structures, and present an overview of the current state-of-the-art.
Journal ArticleDOI
A Frequency Selective Surface With Miniaturized Elements
Kamal Sarabandi,Nader Behdad +1 more
TL;DR: In this paper, a bandpass frequency selective surface (FSS) is proposed, which is made up of periodic array of metallic patches separated by thin air-gaps backed by a wire mesh having the same periodicity.
Journal ArticleDOI
Convoluted array elements and reduced size unit cells for frequency-selective surfaces
TL;DR: In this paper, the authors proposed to reduce the unit cell dimension p as much as possible for a given reflection wavelength λ 1, thereby increasing its separation from grating responses.
Journal ArticleDOI
A Miniaturized Dual-Band Frequency Selective Surface (FSS) With Closed Loop and Its Complementary Pattern
TL;DR: In this paper, a single-layer substrate frequency selective surface (FSS) made of miniaturized elements is proposed, with two controllable passbands obtained, each FSS element consists of a loop wire on the top metal layer and its complementary pattern etched at the bottom one, which provides two transmission poles separated by a transmission zero.
Journal ArticleDOI
Broadband polarization rotator based on multi-order plasmon resonances and high impedance surfaces
TL;DR: In this paper, a broadband reflective polarization rotator was proposed to generate multi-order plasmon resonances at three neighboring frequencies and maintain a polarization conversion efficiency greater than 56% in 2.0-3.5 GHz.