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

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 $\le1/2 \lambda _{0}$ (length & width) and a height $\le1/4 \lambda _{0}$ , overall $0.42\lambda _{0}\times 0.42\lambda _{0}\times 0.18\lambda _{0}$ , (‘ $\lambda _{0}$ ’ is the wavelength at 2.4 GHz) with decent radiation efficiency, total efficiency, and realized gain for both lower and higher order modes.