Document Type
Thesis
Date of Award
5-31-1990
Degree Name
Master of Science in Mechanical Engineering - (M.S.)
Department
Mechanical and Industrial Engineering
First Advisor
Ian Sanford Fischer
Second Advisor
Anthony D. Rosato
Third Advisor
Rajesh N. Dave
Abstract
Dielectric resonators (DR) are suitably shaped objects made of high dielectric constant materials like TiO2, BaO, ZnO, and accessory ingredients, which can function as electrical resonators covering a very wide frequency range upto 40GHz. The physical dimensions of dielectric resonators are in mm range. High dielectric constant material resonators seem to be ideally suited for microwave applications because of their miniature size, low loss, insensitivity to magnetic dc biasing fields, and ability to concentrate large RF magnetic fields in small volumes. However temperature stabilization of dielectric resonators is an important consideration as the center frequency is a function of temperature. The present dissertation describes the the-oretical analysis of such DR's based on two different mathematical and physical models. These models present a simplified approach to the solution of the electromagnetic field behaviour in the DR, and are capable of giving results which are near to the exact values.
One of the practical applications of such DR's is an oscillator. Here in this thesis report, the dynamic characteristics of a GaAsFET oscillator have also been investigated in details. Especially, studies have been made about the stabilized oscillator temperature coefficient, maximum frequency deviation and the pushing figure as a function of the coupling coefficient. These results would be useful for precise custom made design of such oscillators. Finally, the effects of the environmental conditions on the operation of a practical DR structure are studied by using a computer sim-ulation technique. The study is based on approximate expression for the resonant frequency stability of dielectric resonators.
Recommended Citation
Kalgren, Dennis Alan, "Adhesion effects in micro mechanisms" (1990). Theses. 2772.
https://digitalcommons.njit.edu/theses/2772
