Wideband Rectangular Dielectric Resonator Antenna (Dra) With Slot-Fed Design

Abstract

Abstract-A novel wideband rectangular dielectric resonator antenna (DRA) is proposed in this paper. A hybrid structure with an isolated dielectric resonator (DR) and an equivalent air-dielectric DR is introduced by lifting the resonator from the ground plane. The hybrid structure is excited by a slot-fed mechanism to obtain a smooth transition between each resonant mode. The resonant modes of the isolated DR and the equivalent DR are merged together to form a wideband impedance bandwidth. It is found that the bandwidth of the proposed antenna can be greatly enhanced by using the hybrid DRA structure instead of the case mounted on the ground plane. A detailed parametric study is carried out to analyze the characteristics of the proposed antenna. Measured results show that the proposed DRA has a 10 dB impedance bandwidth of 61% from 2.4 GHz to 4.5 GHz and the radiation pattern is stable through the operating frequency.

Dual-Sense Dual-Polarized Hybrid Rectangular Dielectric Resonator Antenna for Multiband Applications

“…The resonant frequency for TE x δ11 and TE y 1δ1 modal fields can be predicted with reasonable accuracy as follow [14], For TE x δ11 mode,…”

Recent developments in bandwidth improvement of dielectric resonator antennas

“…Broadly, these approaches can be divided into four categories; firstly, according to the antenna geometry (DR shape/fractal/EBG/metamaterial), secondly, the coupling mechanism (feeding type/aperture shape), thirdly, the DR permittivity, and lastly, according to the excitation of specific mode. From ease of readers' point of view, these techniques are discussed separately for single‐band, dual‐band, and multi‐band,, respectively. Moreover, some other characteristics say radiation/notch…”

“…Next to DRA shape, the coupling mechanism plays an important role in controlling performance characteristics of DRA. This technique is also known as bandwidth improvement by means of impedance matching and this can be established either by modification in feeding line or slot types …”

“…Of course, depending upon the shape and number of slot(s), the bandwidth varies. All the bandwidth related literatures emphasizing slot types are discussed here.…”

“…Weng et al, have used the air dielectric between the rectangular DR and the ground plane for enhancing the bandwidth up to 61%. Deng et al, have introduced a pair of symmetrical edge resonators to antenna, where each resonator is composed of a T‐shaped slot etched on the edge of the radiator and a strip printed on the opposite side of the substrate along with U‐slot DFS concept to achieve dual band of 2.4 to 2.48 GHz for Bluetooth and 3.1 to 10.6 GHz for UWB frequency bands.…”