Dual-mode dielectric resonator antenna and array fed by planar slot

Abstract

A dual-mode dielectric resonator antenna (DRA) and array fed by planar slot are presented. The bandwidth is expanded by merging the adjacent bands corresponding to TE^y_1δ1 and TE^y_1δ3 modes. The measured results are in good agreement with the simulated ones. The measured −10 dB bandwidth is 17.8% and the average gain is 6.5 dBi. Furthermore, a 2 × 2 DRA array is developed, which is improved with 45.5% impedance bandwidth and a peak gain of 12.6 dBi. The proposed dual-mode dielectric resonator antenna structure is promising for high-frequency applications due to its merits of simple feeding structure and wide band.