Bandwidth Enhancement Scheme for a Low Profile Rectangular Dielectric Resonator Antenna with a Flagpole Shaped Microstrip Feed

This article exemplifies about the design of a low profile Rectangular Dielectric Resonator Antenna (RDRA) associated with a flagpole shaped microstrip feeding technique for bandwidth enhancement. The proposed 'Six' shaped DRA works at X band and Ku band frequencies and offers a broad bandwidth of 57.11% from 8.82 to 14.6 GHz with limited volume of 2.5 mm. A flagpole shaped microstrip feeding contributes superior coupling and improves impedance bandwidth to its maximum. The proposed antenna can serve as an excellent candidate for high frequency applications such as satellite broadcast services and space shuttle communication. It is very useful for both uplink (10.95-11.7 GHz) and downlink frequencies (14-14.6 GHz) of Ku band VSAT (Very Small Aperture Terminal). The new 'Six' shaped DR structure and the modified microstripline feeding technique induce TE111 and TE112 modes of RDRA. The closely spaced resonant modes get coupled and accelerate the process of bandwidth enhancement. Results show that there is an achievement of fair agreement between measured and simulated results of the proposed antenna.