Efficient computation of resonant frequencies and quality factors of cavities via a combination of the finite-difference time-domain technique and the Pade approximation

Author

Dey, Supriyo ; Mittra, Raj

Author_Institution

Electromagn. Commun. Res. Lab., Pennsylvania State Univ., University Park, PA, USA

Volume

8

Issue

12

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

415

Lastpage

417

Abstract

An efficient method for analyzing cavity structures by using the fast Fourier transform (FFT)/Pade technique, in combination with the finite-difference time-domain (FDTD) method, is presented. Without sacrificing the accuracy of the results, this new method significantly reduces the computational time compared to that needed where the conventional FFT algorithm is used. The usefulness of this approach is demonstrated by modeling a lossy cavity and computing its resonant frequencies as well as Q

Keywords

Q-factor; approximation theory; cavity resonators; fast Fourier transforms; finite difference time-domain analysis; FDTD method; FFT/Pade technique; Pade approximation; cavity structures; computational time reduction; fast Fourier transform; finite-difference time-domain technique; lossy cavity; quality factors; resonant frequencies; Circuit optimization; Fast Fourier transforms; Finite difference methods; Frequency domain analysis; Microwave filters; Microwave oscillators; Q factor; Resonance; Resonant frequency; Time domain analysis;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.746760

Filename

746760