Master's Thesis from the year 2016 in the subject Electrotechnology, grade: A, , course: Communication Engineering, language: English, abstract: The objective of this paper is to provide a comprehensive exploration of Dielectric Resonator Antennas (DRAs), a type of radio antenna predominantly utilized in microwave frequencies. This investigation will encompass various aspects of DRAs, including their diverse shapes, feeding techniques, and the need for their development. Furthermore, it will delve into the problems inherent in conventional metallic antennas, which DRAs aim to address, as well as the objectives and methodology of this study. In the realm of modern wireless communication, antennas play a pivotal role in facilitating the transmission and reception of audio and video data. As the demand for high-quality, simultaneous data exchange continues to surge, the development of wideband and dual-band antennas has become paramount. It is within this context that Dielectric Resonator Antennas (DRAs) have gained significant attention, particularly in the fields of mobile and wireless communication. A DRA is a unique type of radio antenna that primarily operates within microwave frequencies. It is constructed from a ceramic material block of various shapes and is often mounted on a conducting surface, serving as a ground plane. DRAs offer several distinct advantages, including compact size, lightweight design, low profile, and cost-effectiveness. They have proven to be practical and efficient elements for antenna applications, boasting attributes such as high radiation efficiency, flexible feed arrangements, simple geometry, and compact form. The resonant frequencies of DRAs are primarily determined by factors such as size, shape, and the permittivity of the material used. In recent decades, the interest in developing antenna systems operating at higher frequencies has grown considerably. Conventional metallic antennas face challenges related to power losses, radiated power capabilities, and fabrication complexities when scaled down to operate in these higher frequency bands. The solution to these challenges lies in replacing metallic structures with dielectric material structures, giving rise to Dielectric Resonator Antennas.
