Undesirable Higher Order Modes Suppression Using Compact Hybrid Liquid Antenna for Wi-Fi Applications

Abstract

In this paper, a multi-band multi-mode hybrid antenna using a liquid Dielectric Resonator Antenna (DRA) and patch configuration working for Wi-Fi applications at 2.4 GHz and 5 GHz bands is designed. This work proposes a way to suppress and replace undesirable higher-order modes of the DRA with desirable modes using a hybrid design keeping the compactness of the antenna still intact. The result is a compact multi-mode antenna with dimensions ≤ ½ λ0 (length & width) and a height ≤ ¼ λ0, overall 0.42λ0×0.42λ0×0.18λ0, ('λ0' is the wavelength at 2.4 GHz) with decent radiation efficiency, total efficiency and realized gain for both lower and higher order modes.INDEX TERMS DRA, patch antenna design, ME dipole, liquid dielectric antenna, hybrid antenna