Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"Dielectric Resonator Antenna"”.
-
Design and Analysis of a Cylindrical Dielectric Resonator Antenna Array and Its Feed Network
… need for smaller, lighter, more efficient antennas for commercial and military applications. One such antenna that meets these requirements is the dielectric resonator antenna (DRA). In recent years there has been an abundance of research on the utilization of the DRA as a radiating …
-
Design and optimization of dielectric resonator antenna arrays based on substrate integrated waveguide technology for millimeter-wave applications
… new challenges to the research community. Antennas and MMW circuits with compact size, low cost, high efficiency, and low loss are much needed to meet the new requirements of these applications. This research focuses on the design and optimization of dielectric resonator antenna (DRA) …
-
Dielectric Resonator Antennas : theory and design
Theoretical models for the analysis of Dielectric Resonator Antenna (DRA) are developed. There are no exact solutions to many of the problems in analytical form, therefore a strong focus on the physical interpretation of the numerical results is presented alongside theoretical models. I have used …
-
Computational Design of the Electrical and Mechanical Performance of Steerable MEMS Antennas
… and variations of a broadband microwave antenna that can be beam-steered by a micro-electromechanical system (MEMS). The steerable MEMS antenna of this work was comprised of a planar antenna on top of a Silicon membrane. The membrane is etched to create a gimbal hinge structure and a …
-
Model and design of small compact dielectric resonator and printed antennas for wireless communications applications. Model and simulation of dialectric resonator (DR) and printed antennas for wireless applications; investigations of dual band and wideband responses including antenna radiation performance and antenna design optimization using parametric studies
Dielectric resonator antenna (DRA) technologies are applicable to a wide variety of mobile wireless communication systems. The principal energy loss mechanism for this type of antenna is the dielectric loss, and then using modern ceramic materials, this may be very low. These antennas are typically …
-
Compact integrated designs of microwave filters and antennas with dual-polarization
Microwave antenna and filter circuits are key components in all types of communication systems. In order to achieve high compactness and high performance for next generation wireless networks, this thesis investigates the use of a material with a high dielectric constant (approximately 20) and low …
-
Integration of microwave and millimeter wave bandpass filters with antennas
Filters and antennas are essential elements in communication and radar systems. In a conventional design, antennas and filters are designed independently and then connected together through transitions and/or connectors, which introduces loss and increases the size of the design. Filter and antenna …
-
Design and analysis of reconfigurable MIMO antennas for next generation wireless communication systems
… to keep the mutual coupling between the antenna elements low so multiple signals can be resolved effectively. Given the lower operating frequency of the new systems as compared to the WiFi and the existing cellular standards, the antennas in portable devices must be electrically small and …
-
Towards High-Performance Reflectarray Antennas: Phase Sensitivity Reduction for Wide Bandwidth
Reflectarray antennas are gaining popularity in satellite and communication systems due to their high gain and lightweight design. However, their limited bandwidth poses a significant challenge because phase behavior varies across different frequencies. This thesis aims to address this limitation …
-
DESIGN AND IMPLEMENTATION OF MICROSTRIP MONOPOLE AND DIELECTRIC RESONATOR ANTENNAS FOR ULTRA WIDEBAND APPLICATIONS
… This increases the demand on designing UWB antennas that meet the requirements of different UWB systems. In this dissertation, different UWB antennas are proposed such as an antenna that covers almost the entire UWB bandwidth, 3.5-11 GHz, as defined by the federal communication commission …
-
Dielektrická rezonátorová anténa integrovaná do substrátu
Bakalářská práce se zabývá návrhem dielektrické rezonátorové antény v mikrovlnném pásmu X, kde je rezonátor tvořen pomocí perforací mikrovlnného substrátu. Celá anténa je tvořena dvěma vrstvami. Anténa je napájená vlnovodem integrovaným do substrátu. Je popsán návrh rozměrů pro dosažení požadované …