Experimental Characterisation of Near Field Backscatter from Thin Resistively Loaded FSS Absorbers

Niamh McGuigan, Gareth Conway, Robert Cahill, Dmitry Zelenchuk, Normi Zabri

Research output: Contribution to journalArticle

Abstract

Experimental results are employed to show that a thin metal backed resistively loaded Frequency Selective Surface (FSS) exhibits significant radar backscatter suppression when the structure is illuminated by an antenna placed in close proximity to the periodic array. This is investigated in the range 9 – 11 GHz by measuring the shift in the resonant frequency of an impedance matched (|S11|  15 dB at 10.22 GHz) microstrip patch which is placed in five different positions ranging from /30 to /5 distance above the surface of the FSS. Detuning of the antenna by signals reflected from the absorber surface is shown to be much less significant than the upward frequency shift in the measured |S11| for a metal plate and tissue phantom, therefore this technology could be used to enhance the performance of on-body wireless sensors.
LanguageEnglish
Pages1-2
JournalIET Electronics Letters
Early online date02 Oct 2017
DOIs
Publication statusPublished - 02 Oct 2017

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Frequency selective surfaces
Antennas
Plate metal
Acoustic impedance
Natural frequencies
Radar
Tissue
Sensors
Metals

Cite this

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title = "Experimental Characterisation of Near Field Backscatter from Thin Resistively Loaded FSS Absorbers",
abstract = "Experimental results are employed to show that a thin metal backed resistively loaded Frequency Selective Surface (FSS) exhibits significant radar backscatter suppression when the structure is illuminated by an antenna placed in close proximity to the periodic array. This is investigated in the range 9 – 11 GHz by measuring the shift in the resonant frequency of an impedance matched (|S11|  15 dB at 10.22 GHz) microstrip patch which is placed in five different positions ranging from /30 to /5 distance above the surface of the FSS. Detuning of the antenna by signals reflected from the absorber surface is shown to be much less significant than the upward frequency shift in the measured |S11| for a metal plate and tissue phantom, therefore this technology could be used to enhance the performance of on-body wireless sensors.",
author = "Niamh McGuigan and Gareth Conway and Robert Cahill and Dmitry Zelenchuk and Normi Zabri",
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AU - McGuigan, Niamh

AU - Conway, Gareth

AU - Cahill, Robert

AU - Zelenchuk, Dmitry

AU - Zabri, Normi

PY - 2017/10/2

Y1 - 2017/10/2

N2 - Experimental results are employed to show that a thin metal backed resistively loaded Frequency Selective Surface (FSS) exhibits significant radar backscatter suppression when the structure is illuminated by an antenna placed in close proximity to the periodic array. This is investigated in the range 9 – 11 GHz by measuring the shift in the resonant frequency of an impedance matched (|S11|  15 dB at 10.22 GHz) microstrip patch which is placed in five different positions ranging from /30 to /5 distance above the surface of the FSS. Detuning of the antenna by signals reflected from the absorber surface is shown to be much less significant than the upward frequency shift in the measured |S11| for a metal plate and tissue phantom, therefore this technology could be used to enhance the performance of on-body wireless sensors.

AB - Experimental results are employed to show that a thin metal backed resistively loaded Frequency Selective Surface (FSS) exhibits significant radar backscatter suppression when the structure is illuminated by an antenna placed in close proximity to the periodic array. This is investigated in the range 9 – 11 GHz by measuring the shift in the resonant frequency of an impedance matched (|S11|  15 dB at 10.22 GHz) microstrip patch which is placed in five different positions ranging from /30 to /5 distance above the surface of the FSS. Detuning of the antenna by signals reflected from the absorber surface is shown to be much less significant than the upward frequency shift in the measured |S11| for a metal plate and tissue phantom, therefore this technology could be used to enhance the performance of on-body wireless sensors.

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DO - 10.1049/el.2017.3233

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JO - Electronics Letters

T2 - Electronics Letters

JF - Electronics Letters

SN - 0013-5194

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