Bandwidth Enhancement of Proximity-Coupled Patch Antenna Using Dual Open-Ended Ring-Shaped Slots for Sub-6 GHz Applications

Asthan, Rheyuniarto Sahlendar; Ulfah, Mia Maria

doi:10.15294/jte.v18i1.47475

Journal

Bandwidth Enhancement of Proximity-Coupled Patch Antenna Using Dual Open-Ended Ring-Shaped Slots for Sub-6 GHz Applications

Jurnal Teknik Elektro · Vol. 18 No. 1 (2026) · pp. 46–51

DOI: 10.15294/jte.v18i1.47475
ISSN: 2549-1571, 1411-0059
Published: 2026-06-30
Publisher: LPPM Universitas Negeri Semarang
Language: eng

Abstract

This paper presents a bandwidth enhancement of patch antenna intended for sub-6 GHz applications. A square-shaped radiating patch is configured on a double-layer FR-4 dielectric substrates with a dielectric constant of 4.3 and a total thickness of 3.2 mm. To improve the impedance bandwidth, the antenna is fed using proximity-coupling method, in which the microstrip feeding line and the ground plane are placed on the top and bottom layers of the second substrate. Dual open-ended ring-shaped slots are subsequently introduced and etched on the radiating patch element to further enhance the antenna bandwidth. Various slot structures are evaluated, and their physical parameters are varied in a parametric study to analyze their effect on antenna performance, particularly impedance bandwidth. The proposed antenna has a compact dimension of 0.38λ0×0.38λ0×0.06λ0 and exhibits wideband characteristics with a fractional bandwidth of 22.3%.

Keywords

Collaboration network of the authors

11 authors · 20 co-authorship links · 3 across different organisations

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Bandung Institute of Technology
Sumatera Institute of Technology
Affiliation unknown

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Co-author	Organisation	Joint articles
Achmad Munir	Bandung Institute of Technology	1
Mohammad Ridwan Effendi	Bandung Institute of Technology	1
Iskandar Iskandar	Bandung Institute of Technology	1
Alvita Maurizka	Bandung Institute of Technology	1
Fadil Hamdani	Bandung Institute of Technology	1
Muhammad Reza Kahar Aziz	Affiliation unknown	1
Mohammad Anthoni	Affiliation unknown	1
Anita Pascawati	Affiliation unknown	1
Dick Maryopi	Affiliation unknown	1

Affiliations come from OpenAlex; journal OAI-PMH metadata carries none. Authors without an OpenAlex ID are matched by name, which can merge or split people.

Metadata source: OAI-PMH (metadata jurnal) https://journal.unnes.ac.id/journals/jte/oai, first harvested 6 Nov 2026, last seen 8 Nov 2026.

Original metadata (oai_dc)

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	<dc:title xml:lang="en">Bandwidth Enhancement of Proximity-Coupled Patch Antenna Using Dual Open-Ended Ring-Shaped Slots for Sub-6 GHz Applications</dc:title>
	<dc:creator xml:lang="en">Asthan, Rheyuniarto Sahlendar</dc:creator>
	<dc:creator xml:lang="en">Ulfah, Mia Maria</dc:creator>
	<dc:subject xml:lang="en">open-ended ring-shaped slot</dc:subject>
	<dc:subject xml:lang="en">proximity coupling</dc:subject>
	<dc:subject xml:lang="en">sub-6 GHz applications</dc:subject>
	<dc:subject xml:lang="en">wideband patch antenna</dc:subject>
	<dc:description xml:lang="en">This paper presents a bandwidth enhancement of patch antenna intended for sub-6 GHz applications. A square-shaped radiating patch is configured on a double-layer FR-4 dielectric substrates with a dielectric constant of 4.3 and a total thickness of 3.2 mm. To improve the impedance bandwidth, the antenna is fed using proximity-coupling method, in which the microstrip feeding line and the ground plane are placed on the top and bottom layers of the second substrate. Dual open-ended ring-shaped slots are subsequently introduced and etched on the radiating patch element to further enhance the antenna bandwidth. Various slot structures are evaluated, and their physical parameters are varied in a parametric study to analyze their effect on antenna performance, particularly impedance bandwidth. The proposed antenna has a compact dimension of 0.38λ0×0.38λ0×0.06λ0 and exhibits wideband characteristics with a fractional bandwidth of 22.3%.</dc:description>
	<dc:publisher xml:lang="en">LPPM Universitas Negeri Semarang</dc:publisher>
	<dc:date>2026-06-30</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
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	<dc:type xml:lang="en">Peer-reviewed Article</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.unnes.ac.id/journals/jte/article/view/47475</dc:identifier>
	<dc:identifier>10.15294/jte.v18i1.47475</dc:identifier>
	<dc:source xml:lang="en">Jurnal Teknik Elektro; Vol. 18 No. 1 (2026); 46-51</dc:source>
	<dc:source>2549-1571</dc:source>
	<dc:source>1411-0059</dc:source>
	<dc:source>10.15294/jte.v18i1</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journal.unnes.ac.id/journals/jte/article/view/47475/10454</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2026 Jurnal Teknik Elektro</dc:rights>
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