Analysis and Optimization of Conformal Patch Excited Wideband DRA of Several Shapes

Abstract

In this paper various shapes of DR antennas excited by common feed have been proposed and successfully implemented for wideband applications. Proposed structures are Hemispherical, Arrow-shaped and Triangular DRA, while common excited feed is inverted trapezoidal conformal patch. These shapes of DR offer significant optimization in several parameters such as impedance bandwidth, peak gain and bandwidth per unit volume of the antenna. By using inverted trapezoidal patch feed mechanism an impedance bandwidth (VSWR<2) of about 63 % for hemispherical shape, 66 % for arrow shape, and 72 % for triangular shape DRA has been achieved with maximum bandwidth per unit volume. Proposed wideband DRAs i. e. triangular, hemispherical, and arrow shapes of DR antennas cover almost complete C-band (4 GHz–8 GHz) frequency spectrum of microwave. The average peak gain within the operating band for hemispherical, arrow, and triangular shape DRA are about 5, 5.4, and 5.5 dB respectively. A comparative analysis of proposed structures for various antenna parameters has been analyzed by HFSS (High-Frequency Structure Simulator) and validated by experimental results.

Metamaterial loaded aperture coupled biodegradable star‐shaped dielectric resonator antenna for WLAN and broadband applications

“…3,4 Long and his colleagues were the first who has done experimental investigations on DRAs. [4][5][6] Since then, various theoretical and experimental investigations on DRAs of different shapes are available in literature such as cylindrical, rectangular, hemispherical, spherical, gammadion cross, quadruple, and so on, [7][8][9][10][11][12][13] whereas rectangular dielectric resonator antenna (RDRA) have attractive traits over other shapes such as by properly choosing the three dimensions of the RDRA the mode degeneracy can be avoided.…”