Document Type
Thesis
Date of Award
5-31-1989
Degree Name
Master of Science in Electrical Engineering - (M.S.)
Department
Electrical Engineering
First Advisor
Tushar Bhattacharjee
Second Advisor
W. H. Warren Ball
Third Advisor
Edip Niver
Abstract
This dissertation deals with the studies and analysis of Dielectric Resonators (DR). A shielded dielectric iesonator structure, consisting of the substrate, the spacer, the dielectric resonator and the metallic shielding is modelled theoretically. The theoretical expressions for the resonance fields are derived by using radial-mode matching and axial mode-matching techniques. In these techniques, the structure is divided into partial regions and the fields in each pai tial region are represented in terms of a series of the appropriate modes with unknown coefficients. Matching the adjacent regions yields a system of linear or nonlinear equations — which then are solved. The choice of the pal ticular method depends on boundary matching requirements, as has been shown.
Since the above two methods have sonic limitations for nummical calculations, a more versatile and efficient numerical technique, i.e. finite-difference method, is also employed for the evaluation of the field distribution in the dielectric resonator structure. The field expressions are then used for the evaluation of the coupling coefficient between the dielectric resonator and the microstrip line which is magnetically coupled to the DR. The field distribution and the coupling coefficient as a function of separation distance between DR and microstrip line are calculated and presented.
These theoretical results will be useful in many practical applications such as in microwave systems using resonators, filters, etc., with high Q, compact size, low-loss and low cost characteristics.
Recommended Citation
Tu, Xuan, "Analysis on dielectric resonators" (1989). Theses. 2936.
https://digitalcommons.njit.edu/theses/2936
