Dual-Band Omnidirectional Parasitic Dielectric Resonator Antenna
摘要
A simple structured dual-band omnidirectional as well as directional parasitic coupled, quadrilateral shaped dielectric resonator antenna (DRA) feeding by a coaxial connection is presented. It consists of a FR4 substrate having a plus shaped patch, excited by a coaxial connector at the center of the structure. Four rhombus shaped DRA is diagonally placed above the microstrip line. Variation of height of the parasitic DRA affecting the antenna radiation pattern is investigated in this paper. The antenna has an omnidirectional radiation property at the first resonance frequency 3 GHz and directional radiation pattern at the second resonance frequency 4.5 GHz is also observed. The DRA is used to enhance the radiation field at resonance frequency. The proposed antenna demonstrates an omnidirectional radiation pattern at lower resonance frequency and four directional radiation patterns at second resonance frequency.