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2025-03-20
A Circularly Polarized Magnetoelectric Dipole Antenna with Microstrip-Line Aperture-Coupled Feeding
By
Progress In Electromagnetics Research C, Vol. 154, 11-19, 2025
Abstract
This paper presents a high-gain right-hand circularly polarized (RHCP) magnetoelectric (ME) dipole antenna (MEDA) with microstrip-line aperture-coupled feeding. By extending one pair of diagonal horizontal metallic plates in the traditional linearly polarized MEDA in opposite directions, the electric dipole current becomes parallel to the magnetic dipole current, achieving circular polarization performance. The antenna is excited using a microstrip-line aperture-coupled feeding structure, and its electrical performance is further enhanced by integrating a box-shaped reflector. The measured results of the antenna prototype show that the impedance bandwidth (|S₁₁| ≤ -10 dB) is 46.8% (2.90-4.67 GHz); the 3 dB axial ratio bandwidth is 26.4% (3.58-4.67 GHz); and the maximum in-band gain reaches 12.9 dBic. A cross-polarization level below -18 dB and a front-to-back ratio exceeding 20 dB highlight the superior performance of the proposed antenna.
Citation
Wu-Sheng Ji, Yun Gao, Xing-Yong Jiang, Xinyi Li, and Wenhan Wan, "A Circularly Polarized Magnetoelectric Dipole Antenna with Microstrip-Line Aperture-Coupled Feeding," Progress In Electromagnetics Research C, Vol. 154, 11-19, 2025.
doi:10.2528/PIERC25012401
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