A Low Profile and Broadband Pattern Reconfigurable Dielectric Resonator Antenna

In this paper, a low profile and broadband pattern reconfigurable dielectric resonator antenna (DRA) is proposed. Four different radiation patterns, including one conical pattern, two tilted patterns and one broadside pattern, are realized by changing the phase difference of the two excitation ports. The antenna has a broad impedance bandwidth of 15.1% (3.37-3.9 GHz) with a low profile of
$\sim 0.1\lambda 0$
. The simulated antenna gains of 5.42 dBi, 8 dBi and 8.48 dBi are achieved over the impedance bandwidth for conical, tilted, and broadside patterns, respectively. The antenna is a good candidate for 5G complex communication applications.