Vertically Polarized, High-Performance, Electrically Small Monopole Filtennas

Tang, MC; Guo, P; Li, D; Hu, KZ; Li, M; Ziolkowski, RW

Vertically Polarized, High-Performance, Electrically Small Monopole Filtennas

Tang, MC Guo, P Li, D Hu, KZ Li, M Ziolkowski, RW

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Antennas and Propagation, 2022, 70, (2), pp. 1488-1493
Issue Date:: 2022-02-01

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Field	Value	Language
dc.contributor.author	Tang, MC
dc.contributor.author	Guo, P
dc.contributor.author	Li, D
dc.contributor.author	Hu, KZ
dc.contributor.author	Li, M
dc.contributor.author	Ziolkowski, RW
dc.date.accessioned	2022-12-07T20:05:54Z
dc.date.available	2022-12-07T20:05:54Z
dc.date.issued	2022-02-01
dc.identifier.citation	IEEE Transactions on Antennas and Propagation, 2022, 70, (2), pp. 1488-1493
dc.identifier.issn	0018-926X
dc.identifier.issn	1558-2221
dc.identifier.uri	http://hdl.handle.net/10453/164211
dc.description.abstract	Vertically polarized, omnidirectional-and endfire-radiating, bandwidth-enhanced, high efficiency, electrically small monopole filtennas are developed. Both designs are attained by organically combining a coax-fed top-hat loaded monopole with two hybrid quarter-wavelength open-end stubs and a shorting post. The hybrid stubs serve two functions. They produce two radiation nulls at both the lower and upper band edges to sharpen the roll-off rate. Moreover, they facilitate the appearance of an additional resonance without affecting the original resonant mode. The shorting post is introduced to engineer the overlap of two resonant modes to yield an enhanced bandwidth. Prototypes of both filtennas were fabricated, assembled, and tested. The measured results are in good agreement with their simulated values, validating their efficacy. The omnidirectional filtenna has an electrically small size (ka = 0.73), a fractional bandwidth (FBW) of 11.3%, and a maximum realized gain of 3.01 dBi. The endfire-radiating filtenna has an electrically small size (ka = 0.93), an operating FBW of 12.8%, and a peak realized gain of 6.09 dBi. Both filtennas exhibit a flat realized gain response and high radiation efficiencies over their entire passbands, as well as very good selectivity with high out-of-band suppression levels.
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.2021.3111331
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.title	Vertically Polarized, High-Performance, Electrically Small Monopole Filtennas
dc.type	Journal Article
utslib.citation.volume	70
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	2022-12-07T20:05:20Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	70
utslib.citation.issue	2

Abstract:

Vertically polarized, omnidirectional-and endfire-radiating, bandwidth-enhanced, high efficiency, electrically small monopole filtennas are developed. Both designs are attained by organically combining a coax-fed top-hat loaded monopole with two hybrid quarter-wavelength open-end stubs and a shorting post. The hybrid stubs serve two functions. They produce two radiation nulls at both the lower and upper band edges to sharpen the roll-off rate. Moreover, they facilitate the appearance of an additional resonance without affecting the original resonant mode. The shorting post is introduced to engineer the overlap of two resonant modes to yield an enhanced bandwidth. Prototypes of both filtennas were fabricated, assembled, and tested. The measured results are in good agreement with their simulated values, validating their efficacy. The omnidirectional filtenna has an electrically small size (ka = 0.73), a fractional bandwidth (FBW) of 11.3%, and a maximum realized gain of 3.01 dBi. The endfire-radiating filtenna has an electrically small size (ka = 0.93), an operating FBW of 12.8%, and a peak realized gain of 6.09 dBi. Both filtennas exhibit a flat realized gain response and high radiation efficiencies over their entire passbands, as well as very good selectivity with high out-of-band suppression levels.

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http://hdl.handle.net/10453/164211