Improving radiation performance of extremely truncated RCAs through near-field analysis

Baba, AA; Hashmi, RH; Esselle, KP; Weily, AR

Improving radiation performance of extremely truncated RCAs through near-field analysis

Baba, AA Hashmi, RH Esselle, KP Weily, AR

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Publisher:: INST ENGINEERING TECHNOLOGY-IET
Publication Type:: Journal Article
Citation:: IET Microwaves, Antennas and Propagation, 2018, 12, (12), pp. 1954-1959
Issue Date:: 2018-10-03

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Field	Value	Language
dc.contributor.author	Baba, AA
dc.contributor.author	Hashmi, RH
dc.contributor.author	Esselle, KP
dc.contributor.author	Weily, AR
dc.date.accessioned	2022-09-05T22:22:09Z
dc.date.available	2022-09-05T22:22:09Z
dc.date.issued	2018-10-03
dc.identifier.citation	IET Microwaves, Antennas and Propagation, 2018, 12, (12), pp. 1954-1959
dc.identifier.issn	1751-8725
dc.identifier.issn	1751-8733
dc.identifier.uri	http://hdl.handle.net/10453/161383
dc.description.abstract	This paper studies the cause of low-broadside directivity and high sidelobe levels (SLLs) in compact resonant-cavity antennas (RCAs) (footprint < 8λ02). An approach to determine an optimal near-field distribution to significantly improve the broadside directivity and SLL of RCAs is presented. A near-field to far-field transformation routine developed in MATLAB is used to study the individual effects of amplitude and phase distributions, above the partially reflecting superstrate (PRS) of RCAs. Unlike the direct use of a full-wave simulator design, this new approach allows the designers to understand the individual effects of amplitude and phase distributions in the radiating near-field region, on the broadside directivity and on the SLL in the far-field radiation pattern. A method to realise a desired complex near-field distribution is demonstrated, using a dielectric PRS. The RCA with the new PRS showed a significant improvement of 5.0 and 6.4 dB in the broadside directivity and SLL, respectively, compared with a uniform PRS without compromising the footprint and profile of the antenna. The predictions of MATLAB are validated using computer simulation technology (CST) microwave studio (MWS) and experiments.
dc.language	English
dc.publisher	INST ENGINEERING TECHNOLOGY-IET
dc.relation.ispartof	IET Microwaves, Antennas and Propagation
dc.relation.isbasedon	10.1049/iet-map.2018.0056
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.title	Improving radiation performance of extremely truncated RCAs through near-field analysis
dc.type	Journal Article
utslib.citation.volume	12
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/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-09-05T22:22:07Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	12
utslib.citation.issue	12

Abstract:

This paper studies the cause of low-broadside directivity and high sidelobe levels (SLLs) in compact resonant-cavity antennas (RCAs) (footprint < 8λ02). An approach to determine an optimal near-field distribution to significantly improve the broadside directivity and SLL of RCAs is presented. A near-field to far-field transformation routine developed in MATLAB is used to study the individual effects of amplitude and phase distributions, above the partially reflecting superstrate (PRS) of RCAs. Unlike the direct use of a full-wave simulator design, this new approach allows the designers to understand the individual effects of amplitude and phase distributions in the radiating near-field region, on the broadside directivity and on the SLL in the far-field radiation pattern. A method to realise a desired complex near-field distribution is demonstrated, using a dielectric PRS. The RCA with the new PRS showed a significant improvement of 5.0 and 6.4 dB in the broadside directivity and SLL, respectively, compared with a uniform PRS without compromising the footprint and profile of the antenna. The predictions of MATLAB are validated using computer simulation technology (CST) microwave studio (MWS) and experiments.

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http://hdl.handle.net/10453/161383