Influence of dielectric layers on performance of transmission mode frequency selective surface based linear to circular polarization transformers

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Abstract

In this article, we investigate the electromagnetic behavior of freestanding and dielectric embedded frequency selective surface (FSS) based linear to circular polarization convertors. The two structures were designed to operate in transmission mode at normal incidence and yield the lowest value for axial ratio (AR) at frequencies around 10 GHz. In addition to providing mechanical robustness, a 72% increase in the 3 dB AR bandwidth (BW) is achieved when the 140‐μm thick perforated FSS sheet is inserted between two 5‐mm thick polytetrafluoroethylene (PTFE) slabs. At oblique incidence a downward shift in frequency is observed, however the BW is still significantly larger than the results obtained for the freestanding periodic array within a field of view of ±30° in the cardinal planes. Spectral transmission measurements presented for both anisotropic media verify the simulated results.
Original languageEnglish
Number of pages4
JournalMicrowave and Optical Technology Letters
Early online date06 Jan 2020
DOIs
Publication statusEarly online date - 06 Jan 2020

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Frequency selective surfaces
selective surfaces
Circular polarization
circular polarization
transformers
Bandwidth
Anisotropic media
Polytetrafluoroethylene
Polytetrafluoroethylenes
incidence
bandwidth
polytetrafluoroethylene
anisotropic media
field of view
slabs
electromagnetism
shift

Cite this

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title = "Influence of dielectric layers on performance of transmission mode frequency selective surface based linear to circular polarization transformers",
abstract = "In this article, we investigate the electromagnetic behavior of freestanding and dielectric embedded frequency selective surface (FSS) based linear to circular polarization convertors. The two structures were designed to operate in transmission mode at normal incidence and yield the lowest value for axial ratio (AR) at frequencies around 10 GHz. In addition to providing mechanical robustness, a 72{\%} increase in the 3 dB AR bandwidth (BW) is achieved when the 140‐μm thick perforated FSS sheet is inserted between two 5‐mm thick polytetrafluoroethylene (PTFE) slabs. At oblique incidence a downward shift in frequency is observed, however the BW is still significantly larger than the results obtained for the freestanding periodic array within a field of view of ±30° in the cardinal planes. Spectral transmission measurements presented for both anisotropic media verify the simulated results.",
author = "Sarah Clendinning and Robert Cahill and Dmitry Zelenchuk and Vincent Fusco",
year = "2020",
month = "1",
day = "6",
doi = "10.1002/mop.32238",
language = "English",
journal = "Microwave and Optical Technology Letters",
issn = "0895-2477",
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T1 - Influence of dielectric layers on performance of transmission mode frequency selective surface based linear to circular polarization transformers

AU - Clendinning, Sarah

AU - Cahill, Robert

AU - Zelenchuk, Dmitry

AU - Fusco, Vincent

PY - 2020/1/6

Y1 - 2020/1/6

N2 - In this article, we investigate the electromagnetic behavior of freestanding and dielectric embedded frequency selective surface (FSS) based linear to circular polarization convertors. The two structures were designed to operate in transmission mode at normal incidence and yield the lowest value for axial ratio (AR) at frequencies around 10 GHz. In addition to providing mechanical robustness, a 72% increase in the 3 dB AR bandwidth (BW) is achieved when the 140‐μm thick perforated FSS sheet is inserted between two 5‐mm thick polytetrafluoroethylene (PTFE) slabs. At oblique incidence a downward shift in frequency is observed, however the BW is still significantly larger than the results obtained for the freestanding periodic array within a field of view of ±30° in the cardinal planes. Spectral transmission measurements presented for both anisotropic media verify the simulated results.

AB - In this article, we investigate the electromagnetic behavior of freestanding and dielectric embedded frequency selective surface (FSS) based linear to circular polarization convertors. The two structures were designed to operate in transmission mode at normal incidence and yield the lowest value for axial ratio (AR) at frequencies around 10 GHz. In addition to providing mechanical robustness, a 72% increase in the 3 dB AR bandwidth (BW) is achieved when the 140‐μm thick perforated FSS sheet is inserted between two 5‐mm thick polytetrafluoroethylene (PTFE) slabs. At oblique incidence a downward shift in frequency is observed, however the BW is still significantly larger than the results obtained for the freestanding periodic array within a field of view of ±30° in the cardinal planes. Spectral transmission measurements presented for both anisotropic media verify the simulated results.

U2 - 10.1002/mop.32238

DO - 10.1002/mop.32238

M3 - Article

JO - Microwave and Optical Technology Letters

JF - Microwave and Optical Technology Letters

SN - 0895-2477

ER -