A Compact Dielectric Resonator Antenna Excited by a Planar Monopole Patch for Wideband Applications

Abstract

A compact dielectric resonator antenna (DRA) suitable for wideband applications is presented in this paper. The proposed antenna is mainly composed by a notched cylindrical dielectric resonator (DR) coated with a metal surface on the top and a finite ground plane where the presented DR is placed. This antenna is very simple in structure and has a very low overall height of0.14λminat its lowest operation frequency. A comprehensive parametric study is carried out based on Ansoft HFSS to optimize the bandwidth. The proposed antenna has been successfully simulated, optimized, fabricated, and measured. The measurement results demonstrate that the proposed design produces an impedance bandwidth of more than 75%, ranging from 2.9 GHz to 6.7 GHz for the reflection coefficient less than −10 dB. In particular, consistent broadside radiation patterns, stable gain, and high radiation efficiency are also obtained within the operation frequency band.

Wideband and UWB Antennas for Wireless Applications: A Comprehensive Review

“…(a) (b) Figure 49: A dielectric resonator antenna excited by an electric probe having a trapezoidal shape [197]. Tridimensional view (a) and lateral view (b).…”

“…In addition to geometry and to dielectric materials, the antenna excitation system may have a significant impact on the bandwidth of the radiating structure. In particular, an antenna composed of a dielectric spacer, made of foam having a dielectric constant close to one, on which a DR is placed, having a dielectric constant = 9.8 (adopted dielectric material TMM10i), and with a metal plate placed on the top surface of the DR, has been proposed in [197]. The DR is excited by means of a trapezoidal monopole patch, attached to the side surface of the resonator on which a suitable notch is realized, connected to an SMA connector.…”

High Gain Multiband Stacked DRA for WiMax and WLAN Applications

“…To improve the coupling performance between the microstrip feed line and the dielectric resonator, two different permittivity substrates are used to construct the dielectric resonator (Li et al, 2016). The proposed antenna consists of a grounded Arlon dielectric substrate of dimension 70mm×70mm×0.9mm with permittivity ε r =3.8.…”

“…(Pan and Zheng, 2006) 3.97-5.98GHz 40 10.5dbi 95% Design in (Rashidian and Shafai, 2016) 8 to 8.6GHz 10 5.7dBi 90% Design in (Sharma et al, 2017) 2.5-2.76, 3.38-3.54, 7.7 9dBi -4.9-5.3, 5.5-5.61 and 5.78-5.98GHz Design in (Li et al, 2016) 2.9-6.7GHz 75 6.5dBi 90%…”

“…It is characterized by single band operation with 40% impedance bandwidth and 10dBi gain. A notched cylindrical DRA excited by a monopole patch for Ultra Wideband (UWB) applications is investigated in (Li et al, 2016). The maximum gain of the antenna is 6.5dBi and achieves 90% radiation efficiency.…”