High directivity, lens-less THz photoconductive switch dipole antennas

Zhu, N; Ziolkowski, RW

High directivity, lens-less THz photoconductive switch dipole antennas

Zhu, N Ziolkowski, RW

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Publication Type:: Conference Proceeding
Citation:: 8th European Conference on Antennas and Propagation, EuCAP 2014, 2014, pp. 2640 - 2642
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Zhu, N	en_US
dc.contributor.author	Ziolkowski, RW https://orcid.org/0000-0003-4256-6902	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	8th European Conference on Antennas and Propagation, EuCAP 2014, 2014, pp. 2640 - 2642	en_US
dc.identifier.isbn	9788890701849	en_US
dc.identifier.uri	http://hdl.handle.net/10453/121172
dc.description.abstract	© 2014 European Association on Antennas and Propagation. We present several linearly polarized terahertz (THz) photoconductive switch antennas that have been designed for a compressive sensing-based THz imaging system which is currently being brought online. A bow-tie based antenna, including a finite ground plane (on the side of the substrate opposite the bow-tie) and its DC bias lines, is the reference design. By incorporating a metamaterial-inspired artificial magnetic conductor (AMC) structure, the directivity is increased by almost 3 dB at 1.05 THz. The simulation results show that the radiation efficiency of this bow-tie AMC-augmented antenna is above 85% at 1.05 THz. A single capacitively-loaded dipole antenna is then introduced; it has a 12.8 dB directivity, a 11.6 dB realized gain, and a 82% radiation efficiency. By connecting two single capacitively-loaded dipole antennas to form a linear array, higher directivity (14.8 dB), lower sidelobe level (-18 dB) and larger front-to-back-ratio (14 dB) values are achieved. Additional designs will be given in the presentation, including the incorporation of a meta-film structure to decrease the sidelobe levels and increase the front-to-back ratio.	en_US
dc.relation.ispartof	8th European Conference on Antennas and Propagation, EuCAP 2014	en_US
dc.relation.isbasedon	10.1109/EuCAP.2014.6902365	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.title	High directivity, lens-less THz photoconductive switch dipole antennas	en_US
dc.type	Conference Proceeding
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	100501 Antennas and Propagation	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US

Abstract:

© 2014 European Association on Antennas and Propagation. We present several linearly polarized terahertz (THz) photoconductive switch antennas that have been designed for a compressive sensing-based THz imaging system which is currently being brought online. A bow-tie based antenna, including a finite ground plane (on the side of the substrate opposite the bow-tie) and its DC bias lines, is the reference design. By incorporating a metamaterial-inspired artificial magnetic conductor (AMC) structure, the directivity is increased by almost 3 dB at 1.05 THz. The simulation results show that the radiation efficiency of this bow-tie AMC-augmented antenna is above 85% at 1.05 THz. A single capacitively-loaded dipole antenna is then introduced; it has a 12.8 dB directivity, a 11.6 dB realized gain, and a 82% radiation efficiency. By connecting two single capacitively-loaded dipole antennas to form a linear array, higher directivity (14.8 dB), lower sidelobe level (-18 dB) and larger front-to-back-ratio (14 dB) values are achieved. Additional designs will be given in the presentation, including the incorporation of a meta-film structure to decrease the sidelobe levels and increase the front-to-back ratio.

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http://hdl.handle.net/10453/121172