Equivalent circuit model for linear to circular polarisation converters based on bandpass freestanding FSS screens

Research output: Contribution to conferencePaper

Abstract

The electromagnetic performance of bandpass resonant Frequency Selective Surfaces (FSS) is dependent on the dimensions of the various unit cell parameters, namely periodicity, metal thickness and slot length and width. This paper presents an equivalent circuit model (ECM) for a linear to circular polarisation convertor based on a cross slot dipole array. The ECM which accounts for coupling between the orthogonal slots was used to relate the values of inductance and capacitance to the physical dimensions of several different structures that were each designed to work at a centre frequency of 10 GHz. These L and C values were obtained using full wave EM simulations in conjunction the Nelder-Mead method for curve fitting. The 3dB axial ratio (AR) bandwidth of the bandpass FSS screens was maximised by selecting the unit cell dimensions to give a large ratio of inductance to capacitance. Measured results obtained over the range 8 to 12 GHz for a manufactured structure, shows good agreement with the spectral responses calculated from the ECM and full wave simulations.
LanguageEnglish
Number of pages6
Publication statusPublished - 12 Nov 2018
EventThe Loughborough Antennas & Propagation Conference 2018 - Burleigh Court Hotel, Loughborough, United Kingdom
Duration: 12 Nov 201813 Nov 2018
Conference number: 2018
https://events.theiet.org/lapc/index.cfm

Conference

ConferenceThe Loughborough Antennas & Propagation Conference 2018
Abbreviated titleLAPC
CountryUnited Kingdom
CityLoughborough
Period12/11/201813/11/2018
Internet address

Fingerprint

Frequency selective surfaces
Circular polarization
Equivalent circuits
Inductance
Capacitance
Curve fitting
Electromagnetic waves
Natural frequencies
Bandwidth
Metals

Keywords

  • Frequency Selective Surfaces
  • Metasurfaces
  • Circular Polarisation
  • Polarisation Converters

Cite this

Clendinning, S., Cahill, R., Zelenchuk, D., & Fusco, V. (2018). Equivalent circuit model for linear to circular polarisation converters based on bandpass freestanding FSS screens. Paper presented at The Loughborough Antennas & Propagation Conference 2018, Loughborough, United Kingdom.
Clendinning, S. ; Cahill, R. ; Zelenchuk, D. ; Fusco, V. / Equivalent circuit model for linear to circular polarisation converters based on bandpass freestanding FSS screens. Paper presented at The Loughborough Antennas & Propagation Conference 2018, Loughborough, United Kingdom.6 p.
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abstract = "The electromagnetic performance of bandpass resonant Frequency Selective Surfaces (FSS) is dependent on the dimensions of the various unit cell parameters, namely periodicity, metal thickness and slot length and width. This paper presents an equivalent circuit model (ECM) for a linear to circular polarisation convertor based on a cross slot dipole array. The ECM which accounts for coupling between the orthogonal slots was used to relate the values of inductance and capacitance to the physical dimensions of several different structures that were each designed to work at a centre frequency of 10 GHz. These L and C values were obtained using full wave EM simulations in conjunction the Nelder-Mead method for curve fitting. The 3dB axial ratio (AR) bandwidth of the bandpass FSS screens was maximised by selecting the unit cell dimensions to give a large ratio of inductance to capacitance. Measured results obtained over the range 8 to 12 GHz for a manufactured structure, shows good agreement with the spectral responses calculated from the ECM and full wave simulations.",
keywords = "Frequency Selective Surfaces, Metasurfaces, Circular Polarisation, Polarisation Converters",
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note = "The Loughborough Antennas & Propagation Conference 2018, LAPC ; Conference date: 12-11-2018 Through 13-11-2018",
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Clendinning, S, Cahill, R, Zelenchuk, D & Fusco, V 2018, 'Equivalent circuit model for linear to circular polarisation converters based on bandpass freestanding FSS screens' Paper presented at The Loughborough Antennas & Propagation Conference 2018, Loughborough, United Kingdom, 12/11/2018 - 13/11/2018, .

Equivalent circuit model for linear to circular polarisation converters based on bandpass freestanding FSS screens. / Clendinning, S.; Cahill, R.; Zelenchuk, D.; Fusco, V.

2018. Paper presented at The Loughborough Antennas & Propagation Conference 2018, Loughborough, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Equivalent circuit model for linear to circular polarisation converters based on bandpass freestanding FSS screens

AU - Clendinning, S.

AU - Cahill, R.

AU - Zelenchuk, D.

AU - Fusco, V.

PY - 2018/11/12

Y1 - 2018/11/12

N2 - The electromagnetic performance of bandpass resonant Frequency Selective Surfaces (FSS) is dependent on the dimensions of the various unit cell parameters, namely periodicity, metal thickness and slot length and width. This paper presents an equivalent circuit model (ECM) for a linear to circular polarisation convertor based on a cross slot dipole array. The ECM which accounts for coupling between the orthogonal slots was used to relate the values of inductance and capacitance to the physical dimensions of several different structures that were each designed to work at a centre frequency of 10 GHz. These L and C values were obtained using full wave EM simulations in conjunction the Nelder-Mead method for curve fitting. The 3dB axial ratio (AR) bandwidth of the bandpass FSS screens was maximised by selecting the unit cell dimensions to give a large ratio of inductance to capacitance. Measured results obtained over the range 8 to 12 GHz for a manufactured structure, shows good agreement with the spectral responses calculated from the ECM and full wave simulations.

AB - The electromagnetic performance of bandpass resonant Frequency Selective Surfaces (FSS) is dependent on the dimensions of the various unit cell parameters, namely periodicity, metal thickness and slot length and width. This paper presents an equivalent circuit model (ECM) for a linear to circular polarisation convertor based on a cross slot dipole array. The ECM which accounts for coupling between the orthogonal slots was used to relate the values of inductance and capacitance to the physical dimensions of several different structures that were each designed to work at a centre frequency of 10 GHz. These L and C values were obtained using full wave EM simulations in conjunction the Nelder-Mead method for curve fitting. The 3dB axial ratio (AR) bandwidth of the bandpass FSS screens was maximised by selecting the unit cell dimensions to give a large ratio of inductance to capacitance. Measured results obtained over the range 8 to 12 GHz for a manufactured structure, shows good agreement with the spectral responses calculated from the ECM and full wave simulations.

KW - Frequency Selective Surfaces

KW - Metasurfaces

KW - Circular Polarisation

KW - Polarisation Converters

M3 - Paper

ER -

Clendinning S, Cahill R, Zelenchuk D, Fusco V. Equivalent circuit model for linear to circular polarisation converters based on bandpass freestanding FSS screens. 2018. Paper presented at The Loughborough Antennas & Propagation Conference 2018, Loughborough, United Kingdom.