Wideband Low-Loss Magnetoelectric Dipole Antenna for 5G Wireless Network With Gain Enhancement Using Meta Lens and Gap Waveguide Technology Feeding

Abstract

In this paper, a wideband magnetoelectric (ME) dipole antenna excited by a slot coupled to a fork-shaped printed ridge gap waveguide is proposed. To enhance the antenna gain, a meta lens consists of three layers of split ring resonators (SRRs) are integrated horizontally in front of the ME dipole antenna. Each slab contains a 3×7 array of SRR unit cells. The matching bandwidth is improved as a secondary effect of the lens. A 1 × 4 array is designed to provide more gain by adjusting the lens between the edge elements of the four-element array. The antenna is fabricated and tested. The measured results show that -10 dB S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> is obtained between 26.5 and 38.3 GHz. The measure realized gain is better than 15 dBi over the frequency range of 28-38 GHz. A 90% radiation efficiency at 30 GHz is achieved.