Electrically Small, Planar, Frequency-Agile, Beam-Switchable Huygens Dipole Antenna

Wu, Z; Tang, MC; Ziolkowski, RW

Electrically Small, Planar, Frequency-Agile, Beam-Switchable Huygens Dipole Antenna

Wu, Z Tang, MC Ziolkowski, RW

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Antennas and Propagation, 2021, 69, (12), pp. 8271-8281
Issue Date:: 2021-12-01

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Field	Value	Language
dc.contributor.author	Wu, Z
dc.contributor.author	Tang, MC
dc.contributor.author	Ziolkowski, RW
dc.date.accessioned	2022-04-21T03:32:17Z
dc.date.available	2022-04-21T03:32:17Z
dc.date.issued	2021-12-01
dc.identifier.citation	IEEE Transactions on Antennas and Propagation, 2021, 69, (12), pp. 8271-8281
dc.identifier.issn	0018-926X
dc.identifier.issn	1558-2221
dc.identifier.uri	http://hdl.handle.net/10453/156532
dc.description.abstract	An electrically small, planar, frequency-agile, beam-switchable Huygens dipole antenna is investigated in this article. The near-field resonant parasitic (NFRP) design incorporates an Egyptian axe dipole (EAD) and a capacitively loaded loop (CLL) that function as the electric and magnetic NFRP elements, respectively. A varactor diode is integrated into each of these NFRP elements to facilitate simultaneous tuning of its operating frequency and switching its main beam direction. By changing the capacitance values of these two varactor diodes, the antenna realizes two independent, antipodal, unidirectional endfire radiating states with similar realized gain (RG) and front-to-back ratio (FTBR) values within virtually the same frequency-agile ranges. The experimental results demonstrate that the developed antenna exhibits a 5% frequency-agile fractional impedance bandwidth in both of its two oppositely directed endfire states. The antenna is electrically small at the highest frequency of this bandwidth (kahigh < 0.86) and has measured relatively high radiation efficiency (RE >67.7%), peak RG (2.1-3.19 dBi), and FTBR (5.61-13.4 dB) values, together with stable and uniform radiation patterns, over this frequency-agile range.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation	http://purl.org/au-research/grants/arc/DP160102219
dc.relation.ispartof	IEEE Transactions on Antennas and Propagation
dc.relation.isbasedon	10.1109/TAP.2021.3090580
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.title	Electrically Small, Planar, Frequency-Agile, Beam-Switchable Huygens Dipole Antenna
dc.type	Journal Article
utslib.citation.volume	69
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	1005 Communications Technologies
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/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	open_access	*
dc.date.updated	2022-04-21T03:32:15Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	69
utslib.citation.issue	12

Abstract:

An electrically small, planar, frequency-agile, beam-switchable Huygens dipole antenna is investigated in this article. The near-field resonant parasitic (NFRP) design incorporates an Egyptian axe dipole (EAD) and a capacitively loaded loop (CLL) that function as the electric and magnetic NFRP elements, respectively. A varactor diode is integrated into each of these NFRP elements to facilitate simultaneous tuning of its operating frequency and switching its main beam direction. By changing the capacitance values of these two varactor diodes, the antenna realizes two independent, antipodal, unidirectional endfire radiating states with similar realized gain (RG) and front-to-back ratio (FTBR) values within virtually the same frequency-agile ranges. The experimental results demonstrate that the developed antenna exhibits a 5% frequency-agile fractional impedance bandwidth in both of its two oppositely directed endfire states. The antenna is electrically small at the highest frequency of this bandwidth (kahigh < 0.86) and has measured relatively high radiation efficiency (RE >67.7%), peak RG (2.1-3.19 dBi), and FTBR (5.61-13.4 dB) values, together with stable and uniform radiation patterns, over this frequency-agile range.

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http://hdl.handle.net/10453/156532