No 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 and 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.