Abstract
A new broadband and high gain dielectric resonator antenna for millimeter wave is presented. The investigated antenna configuration consists of a periodic square ring frequency selective surfaces on a superstrate, an aperture-coupled scheme feed, an intermediate substrate, and a cylindrical dielectric resonator. This antenna is designed to cover the ISM frequency band at 60 GHz (57 GHz–64 GHz). It was numerically designed using CST microwave Studio simulation software package. Another prototype with a plain dielectric superstrate is also studied for comparison purposes. A bandwidth of 13.56% at the centered frequency of 61.34 GHz and a gain of 11 dB over the entire ISM band have been achieved. A maximum gain of 14.26 dB is obtained at 60 GHz. This is an enhancement of 9 dB compared to a single DRA. HFSS is used to validate our antenna designs. Good agreement between the results of the two softwares is obtained. With these performances, these antennas promise to be useful in the design of future wireless underground communication systems operating in the unlicensed 60 GHz frequency band.
Highlights
The progress of communication technologies over the last decades has been spectacular in confined areas such as tunnels and underground mines
This paper proposes a new hybrid approach where the stacking and superstrate schemes are extended in order to obtain an optimized antenna design that offers wide bandwidth and high gain
An aperture-coupled scheme involving a superstrate and a hybrid Dielectric Resonator Antenna has been proposed in this paper
Summary
The progress of communication technologies over the last decades has been spectacular in confined areas such as tunnels and underground mines. The other advantages of DRA include reduced size, linear and circular polarizations, and availability of different radiation patterns by exciting different radiation modes Antennas of this type generally offer a gain around 6 dBi. Among commonly used gain improvement approaches are stacking dielectric resonators [5], using surface mounted short horn [6] and combining. The demand of high-rate data transmission in wireless communication systems has contributed to the development of many schemes to increase the bandwidth of DRA [8,9,10] Superstrates, such as Frequency Selective Surfaces (FSS), Electromagnetic Band Gap (EBG) metamaterials, and dielectric slabs, are emerging as alternatives to improve the gain of an antenna [11,12,13,14,15,16,17,18,19].
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