Triple Broadband Rectangular Dielectric Resonator Antenna with Triple Stub Microstrip Feeding

This article exemplifies the design methodology of triple broadband Rectangular Dielectric Resonator Antenna (RDRA). Desired triple band operation is achieved by means of two Rectangular Dielectric resonator elements with unequal dimensions and its resultant bandwidth is enlarged by triple stub microstrip feed line. Triple stub feeding enhances bandwidth by giving good degree of coupling between the feeding element and DRA. Proposed DRA can work at "WLAN", "WiMAX", "C" and "X" band frequencies. Our designed antenna results in a bandwidth of 18.78%, 13.1% and 21.75% in lower, middle and upper frequencies. Two element Rectangular Dielectric Resonator with optimal feeding technique gives good marginal gain and stable radiation pattern without using complex structure.