A wideband dual segment three element triangular dielectric resonator antenna (TDRA) has been proposed for applications in X-band. Proposed antenna has been fabricated and tested. The simulation study of the antenna is carried out using Ansoft HFSS simulation software. The simulation results for input characteristics and radiation patterns of the proposed antenna are compared with corresponding experimental results at the resonant frequency. The simulation results are in agreement with measurements. The return loss-frequency characteristics of the proposed antenna are also compared with those of single element, and three element TDRAs. Simulations results of another design of three element TDRA has been presented for C-band application.