Title :
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
fDate :
12/1/1998 12:00:00 AM
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;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
