Almegbel, Khalid;
Tong, Kin-Fai;
(2025)
Low-Profile Proximity-Coupled Cavity-Less Magneto-Electric Dipole Antenna.
Sensors
, 25
(4)
, Article 1234. 10.3390/s25041234.
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Abstract
Magneto-electric dipole (ME-dipole) antennas offer several advantages, including wide impedance bandwidth, stable high gain, unidirectional radiation, and low back-lobe radiation patterns, making them suitable for modern wireless communication systems. However, the thickness of conventional ME-dipole antennas is typically about a quarter wavelength (0.25 (Formula presented.) ) at the center operating frequency, which may not be desirable for portable device applications. This work introduces a new feeding method that reduces the antenna profile and ground plane size while maintaining the same advantages. A suspended horizontal line is proposed to excite the cavity-less ME-dipole antenna through proximity coupling. The measured results demonstrate a wide impedance bandwidth of 45.3% (ranging from 2.05 GHz to 3.25 GHz) and an average in-band gain of 9 dBi with stable (Formula presented.) dBi in-band variation with a ground reflector of size about 0.89 (Formula presented.). More importantly, the cavity-less design reduces the overall thickness of the antenna to 0.17 (Formula presented.) at the center operating frequency.
| Type: | Article |
|---|---|
| Title: | Low-Profile Proximity-Coupled Cavity-Less Magneto-Electric Dipole Antenna |
| Location: | Switzerland |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/s25041234 |
| Publisher version: | https://doi.org/10.3390/s25041234 |
| Language: | English |
| Additional information: | © 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Science & Technology, Physical Sciences, Technology, Chemistry, Analytical, Engineering, Electrical & Electronic, Instruments & Instrumentation, Chemistry, Engineering, proximity coupled, suspended coupling line, wideband, stable high gain, magneto-electric dipoles |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10213350 |
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