Hexaferrite Substrate Versus Impedance Matching for Tuneable Patch Antenna Miniaturisation

Oliver N James; Geoffrey Hilton; Mark Beach

doi:10.1049/cp.2018.0689

Hexaferrite Substrate Versus Impedance Matching for Tuneable Patch Antenna Miniaturisation

Oliver N James, Geoffrey Hilton, Mark Beach

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

259 Downloads (Pure)

Abstract

Novel hexaferrite substrates and impedance matching networks are both means to deliver electrically small antennas (ESAs). The performance characteristics of each are often restricted to a discussion on the reflection coefficient S11, without consideration of full radiative characterisation. In this work the radiation efficiency and pattern of a hexaferrite patch ESA and impedance-matched sub-resonant Rogers RT5880 patch were compared. The efficiencies of each technique were found to be low, while the pattern of the sub-resonant patch displayed considerable divergence from the half-wavelength behaviour of the hexaferrite patch. The stability of the magnetically-tuned radiation pattern of the hexaferrite patch was then demonstrated over a tuned bandwidth of 32.1%.

Original language	English
Title of host publication	2018 12th European Conference on Antennas and Propagation, EuCAP 2018
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Number of pages	5
ISBN (Electronic)	9781785618161
ISBN (Print)	9781785618154
DOIs	https://doi.org/10.1049/cp.2018.0689
Publication status	E-pub ahead of print - 10 Dec 2018
Event	12th European Conference on Antennas and Propagation - London, United Kingdom Duration: 9 Apr 2018 → 13 Apr 2018 Conference number: 12 http://www.eucap2018.org/

Conference

Conference	12th European Conference on Antennas and Propagation
Abbreviated title	EuCAP
Country	United Kingdom
City	London
Period	9/04/18 → 13/04/18
Internet address	http://www.eucap2018.org/

Keywords

Electrically small antennas
hexagonal ferrite
reconfigurable antennas
tuning
UHF antennas

Access to Document

10.1049/cp.2018.0689

Full-text PDF (accepted author manuscript)
This is the author accepted manuscript (AAM). The final published version (version of record) is available online via IEEE at https://ieeexplore.ieee.org/document/8568367 . Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 2.43 MB

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Projects

1 Active

EPSRC CDT Comms EP/I028153/1

Bull, D. R. & Beach, M. A.

1/04/11 → …

Project: Research

Cite this

James, O. N., Hilton, G., & Beach, M. (2018). Hexaferrite Substrate Versus Impedance Matching for Tuneable Patch Antenna Miniaturisation. In 2018 12th European Conference on Antennas and Propagation, EuCAP 2018 Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1049/cp.2018.0689

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abstract = "Novel hexaferrite substrates and impedance matching networks are both means to deliver electrically small antennas (ESAs). The performance characteristics of each are often restricted to a discussion on the reflection coefficient S11, without consideration of full radiative characterisation. In this work the radiation efficiency and pattern of a hexaferrite patch ESA and impedance-matched sub-resonant Rogers RT5880 patch were compared. The efficiencies of each technique were found to be low, while the pattern of the sub-resonant patch displayed considerable divergence from the half-wavelength behaviour of the hexaferrite patch. The stability of the magnetically-tuned radiation pattern of the hexaferrite patch was then demonstrated over a tuned bandwidth of 32.1%.",

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James, ON, Hilton, G & Beach, M 2018, Hexaferrite Substrate Versus Impedance Matching for Tuneable Patch Antenna Miniaturisation. in 2018 12th European Conference on Antennas and Propagation, EuCAP 2018. Institute of Electrical and Electronics Engineers (IEEE), 12th European Conference on Antennas and Propagation, London, United Kingdom, 9/04/18. https://doi.org/10.1049/cp.2018.0689

Hexaferrite Substrate Versus Impedance Matching for Tuneable Patch Antenna Miniaturisation. / James, Oliver N; Hilton, Geoffrey ; Beach, Mark.

2018 12th European Conference on Antennas and Propagation, EuCAP 2018. Institute of Electrical and Electronics Engineers (IEEE), 2018.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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KW - hexagonal ferrite

KW - reconfigurable antennas

KW - tuning

KW - UHF antennas

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