Design of Dielectric Resonator Antennas for UWB Applications

Abstract

Present consequence of communication, all wired ones become as wireless. So, to get capable and affordable communication in wireless technology, compacted and effective radiators are requisite. One of the effective radiators is dielectric resonator antenna (DRA). So the applied power lost in radiated field, to overcome this problem dielectric resonator antenna (DRA) is considered, with this striking feature dielectric resonator antenna become considerable in wireless communication field at microwave frequencies. This thesis shows the design of dielectric resonator antenna (DRA) which consists of parametric studies of the return loss, gain, radiation patterns and directivity for particular wireless application. Dielectric resonator antennas became a very popular in the core sectors of a nation like defense, military, radar and specifically for millimeter wave applications. Due to this elasticity in dielectric resonator antennas, they can be intended with different shapes, handling requirements depending upon the applications in wireless communications. In this, different shapes of DRA’s are designed and these antennas are well suitable for UWB applications. The operating frequency range is 3.1GHz to 10.6GHz. In the first design H-shape DRA is designed, it operates at resonance frequencies 3.3909GHz, 10.1518GHz and gives high return loss. In the second design E-shape DRA is designed, it operates the frequency range from 6.8353GHz to 10.9892GHz and gives bandwidth 47.9%. So based on operating frequency range these two designs suitable for ultra wide band applications. In this rectangular DRA and A-shape DRA’s are designed and compared, based on physical requirements of DRA and characteristics A-shape DRA gives good E-cut radiation pattern, return loss. In the last design omnidirectional U-shaped DRA is investigated. This design operates the frequency range from 3.0083GHz to 10.0532GHz. Based on characteristics and physical requirements these all designs are suitable for ultra wide band applications.