Interference mitigation and WLAN efficiency in modern buildings using energy saving techniques and FSS

Habib, Shahid; Kiani, Ghaffer I.; Butt, Muhammad Fasih Uddin

doi:10.1109/aps.2016.7696191

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…Frequency-selective surfaces (FSSs) have been widely investigated in recent years, both in passive (FSS) and reconfigurable FSS (RFSS) variations. Intelligent walls [1][2][3][4], radomes [5,6], and reconfigurable antennas [7][8][9] are some examples of their applications. Essentially, an FSS consists of basic elements etched on a dielectric substrate, arranged in a planar periodic structure, providing filtering properties.…”

Section: Introductionmentioning

confidence: 99%

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Mamedes

Neto

Silva

et al. 2018

IET Microwaves, Antennas & Propagation

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Reconfigurable frequency-selective surfaces (RFSSs) are of significant interest in applications, such as secure communication systems or tunable radomes, to improve indoor communication and smart antennas. In order to change the frequency-selective surface (FSS) characteristics, and therefore its frequency response, conventional methods include loading with active semiconductor devices such as varactors, PIN diodes, Schottky diodes and radio-frequency microelectromechanical system. Another possibility is the use of mechanical adjusts, such as spring resonators or mechanical rotation. When PIN diodes are used, commonly only the reverse and forward regions, OFF and ON states, respectively, are considered. In this study, the implementation of an RFSS is described, using PIN diodes as active components. The RFSS is based on the fourarms star geometry, and initial design equations and procedures are presented. Numerical and measured results are shown for different project stages, with a very good agreement. In addition to obtaining two distinct resonant frequencies, due to the OFF and ON states, a third situation is included, considering the PIN diode threshold region when the FSS becomes practically transparent, which is an interesting feature with potential applications.

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Section: Introductionmentioning

confidence: 99%

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Mamedes

Neto

Silva

et al. 2018

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

show abstract

“…F REQUENCY-selective surfaces (FSSs) have been intensely studied in the last five decades for their wide applications from microwave to terahertz frequencies [1]- [4]. FSSs have been applied in antenna radomes [5], [6], reconfigurable antennas [7], [8], polarization converters [9], [10], intelligent walls [11], [12], radar cross-section reduction [13], [14] and flat lenses [15], [16]. Essentially, FSSs are two-dimensional arrays of periodic structure, formed by patch or aperture elements etched on a dielectric substrate, providing filtering properties of the incident electromagnetic waves [1], [17].…”

Section: Introductionmentioning

confidence: 99%

Using an Equivalent-Circuit Model to Design Ultra-Wide Band-Stop Frequency-Selective Surface for 5G mm-Wave Applications

Mamedes

Børnemann

2022

IEEE Open J. Antennas Propag.

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In this work we propose a system of two frequency-selective surface (FSSs) with an ultrawide band-stop response for 5G millimeter-wave applications. The analyses are based on the equivalent circuit method, which predicts the transmission characteristics for a plane wave with normal and oblique incidence, and the scattering matrix technique, which provides the result of the cascaded structure. The geometries used in the single-layer FSSs are simple to design, and a series of basic equations are described in order to calculate the inductance and capacitance of conducting strips. FSSs prototypes were fabricated and measured in an anechoic chamber. The first FSS is shaped with the four-arms star geometry, which has a resonant frequency at 27.92 GHz for both measured and simulated results. The second FSS is based on the quasi-square geometry, whose resonant frequency for the experimental and numerical results are 35.68 GHz and 35.76 GHz, respectively, for the transverse electric polarization. These two single-layer FSSs present theoretical resonant frequency at 28 GHz (FSS #1) and 35.8 GHz (FSS #2). Cascading of the two FSSs was realized by using an air gap whose effect was analyzed. A gap space in the order of about λ/4 matched with the predicted resonant frequency of the individual structures. Numerical and measured results show excellent agreement with a maximum error of 1.03%. All measured results closely follow those of simulated ones, thus validating the design approach and applications.

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“…One of the solutions to improve the transmission of these useful signals is the use of FSS [2]. Etching a band-pass FSS in the coating can provide an optimal solution by keeping thermal properties at a reasonable level [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Energy and Communication Efficient FSS for Equivalent Model of Hard-Coated Energy Saving Glass

Kiani

Khan

2021

AMR

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An energy and communication efficient FSS is presented for equivalent model of ESG with hard coating. An FSS with second order band-pass response has been realized by full wave 3D simulations and results have been imitated using an equivalent circuit model to calculate the value of lumped elements. The design is composed of three cascaded FSSs with two glass layers of 6 mm each in between. Due to this topology the transmission of useful RF/microwave signals has been improved for a wider bandwidth, increased thermal insulation, stable frequency and polarization at oblique incidence and security for WLAN at 2.45 GHz.

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Interference mitigation and WLAN efficiency in modern buildings using energy saving techniques and FSS

Cited by 10 publications

References 8 publications

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Using an Equivalent-Circuit Model to Design Ultra-Wide Band-Stop Frequency-Selective Surface for 5G mm-Wave Applications

Energy and Communication Efficient FSS for Equivalent Model of Hard-Coated Energy Saving Glass

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