High gain cylindrical dielectric resonator with superstrate for broadband millimeter-wave underground mining communications

This paper presents a new broadband and high gain dielectric resonator for millimeter-wave underground communications systems. The proposed antenna is composed of a superstrate, an aperture coupled feed, an intermediate substrate and a cylindrical dielectric resonator. This antenna is designed to cover the ISM frequency band (57 GHz-65 GHz). This antenna was numerically designed using CST microwave Studio simulation software package. Simulated results show that the antenna has good performances especially in terms of bandwidth and gain. A bandwidth of 18.4% at the centered frequency of 59.83 GHz and a gain of 11 dB over the entire ISM bandwidth have been achieved. An enhancement of gain by 9 dB has been obtained at the frequency of 60 GHz compared to a single DRA. With these performances, this antennas is suitable for wireless underground communication systems.