A Radiation Pattern-Reconfigurable Antenna with Water and Anisotropic Materials

A differential-fed hybrid antenna with radiation pattern reconfigurability and broadband feature is investigated in this paper. The antenna consists of an anisotropic dielectric resonator (DR) and a dielectric patch (DP). The antenna is designed to be switched between two states: one state is a dielectric patch antenna (DPA) excited with its TM
121
& TM
131
modes for broadside radiation, another is a dielectric resonator antenna (DRA) with its
$\text{TE}_{1\delta 1}$
&
$\text{TE}_{12\delta}$
modes for dual directional radiation. Furthermore, the proposed antenna achieves broadband performance due to the multiple resonant modes, which can complete cover D band and E band simultaneously.