A Wideband Magneto‐Electric Dipole Antenna Based on Coaxial Feeding for Sub‐6G Applications

ABSTRACT In this paper, a stable magneto‐electric (ME) dipole antenna with a bandwidth of over 100% is presented based on a coaxial‐patch integrated feeding structure. Specifically, a pair of C‐shaped slots is etched out of the horizontal patches of E‐dipole to introduce a new resonant frequency point at 4.2 GHz. The vertical folded patch of the M‐dipole is transformed into an irregular 3D trapezoidal structure, which enables edge currents to form additional loops that couple with the original magnetic ring, thereby generating a new resonance at 3.7 GHz. Furthermore, the traditional planar reflector is replaced by a U‑shaped reflector to improve the antenna's impedance matching characteristic. The coaxial feed is employed to provide DC grounding and a mechanically stable construction. A prototype is fabricated and measured. An impressive 10 dB bandwidth of 104.8% (from 1.35 to 4.32 GHz) is achieved, along with a peak gain of 9.6 dBi and cross‐polarization level (CRPL) below −30 dB. The following Sub‐6G frequency bands are simultaneously covered: B3 (1.71–1.735 GHz), B39 (1.885–1.915 GHz), n41 (2.515–2.675 GHz), n78 (3.300–3.800 GHz), and 86% of the n77 band (3.8–4.4 GHz). The proposed ME dipole antenna is a good candidate for Sub‐6G applications.