Wideband Circularly Polarized Dielectric Bird-Nest Antenna with Omnidirectional Radiation Pattern

Description

In wireless communications, antennas are very important because they directly affect signal transmissions and receptions. Recently, the dielectric resonator antenna (DRA) has been studied extensively due to inherent merits of its low loss, small size, low cost, and ease of excitation.Studies of the DRA have mainly concentrated on the broadside radiation mode. In some applications, such as indoor wireless communications, the omnidirectional radiation mode is more important because it provides better coverage. However, much less attention has been received for the omnidirectional DRA. In this project, a novel omnidirectional (conical-beam) circularly polarized dielectric bird-nest antenna is proposed for the first time. The proposed antenna has a very wide bandwidth of more than 40%. A compact modified version of the proposed antenna will also be investigated in this project. The antennas will be simulated using Ansoft HFSS and checked by measurements. Their design guidelines will also be provided.