Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding

Kayode A. Oyesina; Bo Xue; Alex M. H. Wong

doi:10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002

Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding

Kayode A. Oyesina
, Bo Xue
, Alex M. H. Wong^*

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

The electric and magnetic dipoles are the basic sources of electromagnetic waves. Based on specific combinations of the electric and magnetic dipoles, three fundamental directional dipoles — the circular, Huygens, and Janus dipoles — exhibiting interesting near-and far-field directionality have been proposed, offering a greater level of electromagnetic wave manipulation. This paper introduces the “quadruple current filament” (QCF) active source — a reconfigurable active directional dipole that facilitates the implementation of all three fundamental directional dipoles at a single frequency. We show through the superposition of the electric and magnetic dipoles, the implementation of a circular magnetic dipole, a Huygens dipole and a Janus dipole, all at a single frequency and in a single structure. We also demonstrate the near-field directionality of the directional dipoles through wave coupling to nearby waveguides. Our results show switchable preferential coupling to select directions, with far-reaching implications for many exciting applications like wave routing, coupling enhancement or suppression and novel antennas. ©2025 IEEE

Original language	English
Title of host publication	2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (AP-S/CNC-USNC-URSI)
Subtitle of host publication	Proceedings
Publisher	IEEE
Pages	1963-1966
Number of pages	4
ISBN (Electronic)	979-8-3315-2367-1
ISBN (Print)	979-8-3315-2368-8
DOIs	https://doi.org/10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002
Publication status	Published - 2025
Event	2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, AP-S/URSI 2025 - Ottawa, Canada Duration: 13 Jul 2025 → 18 Jul 2025 https://2025.apsursi.org/

Conference

Conference	2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, AP-S/URSI 2025
Abbreviated title	AP-S/URSI 2025
Place	Canada
City	Ottawa
Period	13/07/25 → 18/07/25
Internet address	https://2025.apsursi.org/

Funding

This work is supported by the Government of Hong Kong’s RGC General Research Fund (CityU 11204522).

RGC Funding Information

RGC-funded

Access Output

10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

GRF: Toward Electromagnetic Near-Field Suppression and Enhancement with Janus Antennas
WONG, M. H. A. (Principal Investigator / Project Coordinator) & LUK, K. M. (Co-Investigator)
1/10/22 → …
Project: Research

Cite this

Oyesina, K. A., Xue, B., & Wong, A. M. H. (2025). Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding. In 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (AP-S/CNC-USNC-URSI): Proceedings (pp. 1963-1966). IEEE. https://doi.org/10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002

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title = "Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding",

abstract = "The electric and magnetic dipoles are the basic sources of electromagnetic waves. Based on specific combinations of the electric and magnetic dipoles, three fundamental directional dipoles — the circular, Huygens, and Janus dipoles — exhibiting interesting near-and far-field directionality have been proposed, offering a greater level of electromagnetic wave manipulation. This paper introduces the “quadruple current filament” (QCF) active source — a reconfigurable active directional dipole that facilitates the implementation of all three fundamental directional dipoles at a single frequency. We show through the superposition of the electric and magnetic dipoles, the implementation of a circular magnetic dipole, a Huygens dipole and a Janus dipole, all at a single frequency and in a single structure. We also demonstrate the near-field directionality of the directional dipoles through wave coupling to nearby waveguides. Our results show switchable preferential coupling to select directions, with far-reaching implications for many exciting applications like wave routing, coupling enhancement or suppression and novel antennas. {\textcopyright}2025 IEEE",

author = "Oyesina, \{Kayode A.\} and Bo Xue and Wong, \{Alex M. H.\}",

year = "2025",

doi = "10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002",

language = "English",

isbn = "979-8-3315-2368-8",

pages = "1963--1966",

booktitle = "2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (AP-S/CNC-USNC-URSI)",

publisher = "IEEE",

address = "United States",

note = "2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, AP-S/URSI 2025, AP-S/URSI 2025 ; Conference date: 13-07-2025 Through 18-07-2025",

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}

Oyesina, KA , Xue, B & Wong, AMH 2025, Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding. in 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (AP-S/CNC-USNC-URSI): Proceedings. IEEE, pp. 1963-1966, 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, AP-S/URSI 2025, Ottawa, Canada, 13/07/25. https://doi.org/10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002

Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding. / Oyesina, Kayode A.; Xue, Bo ; Wong, Alex M. H.
2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (AP-S/CNC-USNC-URSI): Proceedings. IEEE, 2025. p. 1963-1966.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Reconfigurable Active Directional Dipoles

T2 - 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, AP-S/URSI 2025

AU - Oyesina, Kayode A.

AU - Xue, Bo

AU - Wong, Alex M. H.

PY - 2025

Y1 - 2025

N2 - The electric and magnetic dipoles are the basic sources of electromagnetic waves. Based on specific combinations of the electric and magnetic dipoles, three fundamental directional dipoles — the circular, Huygens, and Janus dipoles — exhibiting interesting near-and far-field directionality have been proposed, offering a greater level of electromagnetic wave manipulation. This paper introduces the “quadruple current filament” (QCF) active source — a reconfigurable active directional dipole that facilitates the implementation of all three fundamental directional dipoles at a single frequency. We show through the superposition of the electric and magnetic dipoles, the implementation of a circular magnetic dipole, a Huygens dipole and a Janus dipole, all at a single frequency and in a single structure. We also demonstrate the near-field directionality of the directional dipoles through wave coupling to nearby waveguides. Our results show switchable preferential coupling to select directions, with far-reaching implications for many exciting applications like wave routing, coupling enhancement or suppression and novel antennas. ©2025 IEEE

AB - The electric and magnetic dipoles are the basic sources of electromagnetic waves. Based on specific combinations of the electric and magnetic dipoles, three fundamental directional dipoles — the circular, Huygens, and Janus dipoles — exhibiting interesting near-and far-field directionality have been proposed, offering a greater level of electromagnetic wave manipulation. This paper introduces the “quadruple current filament” (QCF) active source — a reconfigurable active directional dipole that facilitates the implementation of all three fundamental directional dipoles at a single frequency. We show through the superposition of the electric and magnetic dipoles, the implementation of a circular magnetic dipole, a Huygens dipole and a Janus dipole, all at a single frequency and in a single structure. We also demonstrate the near-field directionality of the directional dipoles through wave coupling to nearby waveguides. Our results show switchable preferential coupling to select directions, with far-reaching implications for many exciting applications like wave routing, coupling enhancement or suppression and novel antennas. ©2025 IEEE

U2 - 10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002

DO - 10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 979-8-3315-2368-8

SP - 1963

EP - 1966

BT - 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (AP-S/CNC-USNC-URSI)

PB - IEEE

Y2 - 13 July 2025 through 18 July 2025

ER -

Oyesina KA , Xue B , Wong AMH. Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding. In 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (AP-S/CNC-USNC-URSI): Proceedings. IEEE. 2025. p. 1963-1966 Epub 2025 Dec 8. doi: 10.1109/AP-S/CNC-USNC-URSI55537.2025.11266002

Reconfigurable Active Directional Dipoles: Implementation, Near-Field Measurements and Application to Directional Waveguiding

Abstract

Conference

Funding

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Fingerprint

Projects

GRF: Toward Electromagnetic Near-Field Suppression and Enhancement with Janus Antennas

Cite this