One-sided directional slot antenna with magnetic film for 28 GHz application

Abstract

This paper presents the design of a one-sided directional slot antenna for 28GHz application. The antenna element is composed of a top metal, a dielectric substrate, and a bottom metal layer. The antenna is connected by the coplanar waveguide to the feed line. In order to suppress the back-side radiation and improve the front to back (F/B) ratio, the magnetic film is attached to the back side of the antenna. The measured gain of the antenna with the magnetic film is 5.32 dBi at 30.7 GHz, and the F/B ratio is 11.5 dB.