A Phase Gradient Metasurface Antenna Working at 5G Band for Electric Power Communication Network

Abstract

AbstractIn this paper, an antenna, which is based on direct radiation of phase gradient metasurface (PGM), working at 5G band for the application of electric power communication network fault detection system is proposed. The feed network of this antenna is modified from the conventional rectangular cavity to form the microstrip line-like strip to feed the PGMs, and two different dielectrics are employed in order to get good matching. The PGMs are placed at the bottom-layered substrate who has the permittivity of 4.4 and the tangent loss of 0.01, while the top layer is vacuum. The bottom layer is fixed first in the investigation, and the positions of PGMs, including its distance from them to the fed strip and the distance away from the rectangular waveguide, are used to adjust the matching. In addition, after exciting the proposed feeding structure, the PGMs couple this power and the surface wave is formed to excite the their radiations directly. Meanwhile, depending on the electromagnetic wave propagation direction of the proposed feed, the arrangement of super unit structure is redesigned. The simulation results of the whole antenna structure show that the impedance bandwidth is 4.65 GHz–5.80 GHz and the maximum realized gain is 11.4 dBi.Keywords5G antennaElectric power communication networkPhase gradient metasurfaceFeed network