Bandwidth and Gain Enhancement Technique for Gammadion Cross Dielectric Resonator Antenna

Abstract

In this paper, a novel slot-technique is presented to enhance the bandwidth and gain of dielectric resonator antenna (DRA) with two different geometries. First geometry of DRA is Gammadion Cross DRA with semi-cylindrical slots (GCDRA-1), and the other is Gammadion Cross DRA with rectangular slots (GCDRA-2). It is found that the cutting slots can be used to widen the DRA bandwidth or to tune the DRA frequency. Iterations of cutting slot in dielectric resonator are embedded on single structure of DRA. The new Gammadion Cross structure of proposed DRA offers a good impedance bandwidth of 31.6 % for |S 11 | \ -10. In addition, the proposed antenna has a quite higher and more stable gain. The peak gain of proposed antennas is *7 dBi at 5.1 GHZ. The antenna covers most of wireless systems like C-band, 5.2, 5.5 and 5.8 GHz-WLAN and Wi-MAX applications. The simulation process has been done using CST Microwave Studio TM . It is observed that the new proposed Gammadion Cross configuration (GCDRA-2) reduces the DRA volume by 50 % and at the same time enhances the bandwidth from 10 to 31.6 % for |S 11 | \ -10 than the reference antenna. The performance parameters of proposed DRA like reflection coefficient, peak gain and impedance bandwidth has been evaluated and verified these finding with two different Gammadion Cross DRA structures.

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.…”

Design of Biodegradable Quadruple-shaped DRA for WLAN/Wi-Max applications

“…In recent years the most standard dielectric resonators (DRs) configurations such as rectangular, hemispherical, cylindrical etc., have been modified in the pursuit of enhanced operational bandwidths [2][3][4][5][6][7]. As compared to cylindrical or hemispherical DRA, Rectangular Dielectric Resonator Antenna (RDRA) provides more degrees of freedom which can be used to control the impedance bandwidth of the antenna [3].…”