Design of dielectric resonator antenna arrays for wireless applications

Abstract

This thesis presents design of dielectric resonator antenna array for wireless applications. Three antenna designed are presented in the following sections. The first design is a notched chamfered two element rectangular dielectric resonator antenna (DRA) array for wireless (WLAN and WIMAX) applications. Here the DRA array is excited by conformal patch connected to microstrip line. The shape is notched and chamfered to improve the performance of the antenna. From the Simulation results it can be observed that the proposed antenna covers 2.4, 3.6 and 5 GHz WLAN bands and 3.4 to 3.7 GHz WIMAX bands, achieving an impedance bandwidth from 2.18 to 3.75 GHz and 4.84 to 5.14 GHz. Parametric study is done by varying the shapes of the rectangular DRA arrays (Simple Rectangle, chamfered and chamfered with notched). Another parametric study is carried out by varying the dimension of the ground plane of the final design. The second design is a rectangular shaped two element Dielectric Resonator Antenna (DRA) array for 2.4 GHz WLAN application. Here microstrip feed line in corporate (parallel) arrangement is used for feeding. Simulation result shows that the antenna achieves a bandwidth from 2.1 to 3 GHz, covering the 2.4 GHz WLAN band. Here the parametric study is done by varying the feed line and the ground plane of the antenna. The simulation results as well as the parametric studies are incorporated in this thesis. The third one is the Design of four element rectangular shaped dielectric resonator antenna (RDRA) array for wireless applications. The RDRA array is fed by rectangular conformal patch (RCP) connected to microstrip line. Simulation result shows that the proposed antenna achieves an impedance bandwidth from 4 GHz to 7.1 GHz covering various wireless bands. Parametric studies have been carried out by varying the RCP height and the ground plane of the final design.