Accurate study of Q-factor of resonator by a finite-difference time-domain method

Author

Wang, Chi ; Gao, Ben-qing ; Deng, Ci-Ping

Author_Institution

Dept. of Electron. Eng., Beijing Inst. of Technol., China

Volume

43

Issue

7

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

1524

Lastpage

1529

Abstract

This paper describes the application of the finite-difference time-domain method to find the resonators´ Q-factors. There are some techniques which can be used to reach it. One way is to directly compute the power loss using the surface impedance boundary condition (SIBC). The other is to incorporate the perturbation techniques to calculate the Q-value. The rectangular and cylindrical cavities have been studied by these methods. A number of superconductor-sapphire microwave resonators with extra high Q-values have been studied. The results are very good in accuracy

Keywords

Q-factor; finite difference time-domain analysis; perturbation techniques; sapphire; superconducting cavity resonators; Q-factor; cylindrical cavities; finite-difference time-domain method; perturbation techniques; power loss; rectangular cavities; superconductor-sapphire microwave resonators; surface impedance boundary condition; Boundary conditions; Discrete Fourier transforms; Electromagnetic scattering; Finite difference methods; Perturbation methods; Q factor; Resonant frequency; Shape; Surface impedance; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.392910

Filename

392910