Wideband High-Gain Magneto-Electric Dipole Antenna With Novel Director Loaded

Abstract

In this letter, a wideband high-gain magneto-electric dipole (ME-dipole) antenna is proposed. A novel director is loaded above the ME-dipole antenna with a horn-like reflector, and a microstrip-line aperture-coupled feed structure is used to excite the antenna. The antenna achieves stable high gain over a wide frequency band. The proposed antenna is fabricated and measured. The results show that the measured impedance bandwidth (S $11\le $ -10dB) is 89.3% ( $2.35\sim 6.14$ GHz), the measured in-band maximum gain is 12.3dBi, and the measured 3dB gain bandwidth is 67.9% ( $2.83\sim 5.74$ GHz). Cross-polarization below -25dB and stable symmetric radiation patterns are also observed in this antenna. Based on the excellent performance, the proposed antenna has a promising application in the 5G FR1 band.

Keywords

• Aperture-coupled
• director
• high gain
• magneto-electric dipole (ME-dipole) antenna
• wide bandwidth