Designing a Low-Loss Wideband Cylindrical Dielectric Resonator Antenna for High Speed Wireless Communication

High data bandwidth is vital for Smart Computing and Communications. Antennas operating in millimeter wave and microwave frequencies play a critical role in enabling high-speed data transmission in Information and Communication Technology (ICT). The Dielectric Resonator Antenna (DRA) is favored for its lossless radiation characteristics, yet it has a limited bandwidth, around 3%, unsuitable for broader bandwidth needs. This article explores enhancing the Cylindrical DRA’s bandwidth through stacked configurations, adjusting the upper CDRA’s height while keeping the lower DRA constant. The study shows a single CDRA provides about 12.5% bandwidth, while the stacked configuration offers roughly 14.3%. Additionally, introducing an airgap increases the available bandwidth to about 17.15%. The article also discusses changes in resonant frequency, bandwidth, and resonant impedance resulting from CDRA height modifications. In summary, this research addresses the pressing need for higher wireless data bandwidth in Smart Computing and Communications using innovative antenna configurations and highlights their impact on performance metrics.