FDTD method coupled with FFT: A generalization to open cylindrical devices

The extension of a numerical method, based on an FDTD algorithm coupled with FFT, is presented. It can be widely applied to the analysis of axially symmetric passive microwave devices. By incorporating the proper radiation conditions in the algorithm, its capacity to deal with the study of open systems is shown; this allows the determination of its quality factor, as well as the resonant frequency and the spatial distribution of the modes. On the other hand, the proper performance of the technique has been verified (stability of the algorithm, accuracy of results) for modes of high angular dependence. >

[1]  Karl Kunz,et al.  A Three-Dimensional Finite-Difference Solution of the External Response of an Aircraft to a Complex Transient EM Environment: Part I-The Method and Its Implementation , 1978, IEEE Transactions on Electromagnetic Compatibility.

[2]  K. Yee.  Numerical solution of initial boundary value problems involving maxwell's equations in isotropic media , 1966 .

[3]  J. Mosig.  Integral equation Technique , 1989 .

[4]  D. S. Jones,et al.  The theory of electromagnetism , 1964 .

[5]  Raj Mittra,et al.  A study of the nonorthogonal FDTD method versus the conventional FDTD technique for computing resonant frequencies of cylindrical cavities , 1992 .

[6]  Wolfgang J. R. Hoefer,et al.  The Finite-Difference-Time-Domain Method and its Application to Eigenvalue Problems , 1986 .

[7]  A. Taflove,et al.  Numerical Solution of Steady-State Electromagnetic Scattering Problems Using the Time-Dependent Maxwell's Equations , 1975 .

[8]  K. Yee,et al.  A subgridding method for the time-domain finite-difference method to solve Maxwell's equations , 1991 .

[9]  Raj Mittra,et al.  A combination of FD-TD and Prony's methods for analyzing microwave integrated circuits , 1991 .

[10]  A. Glisson,et al.  Evaluation of Modes in Dielectric Resonators Using a Surface Integral Equation Formulation , 1983, 1983 IEEE MTT-S International Microwave Symposium Digest.

[11]  E. Martin,et al.  Finite difference time domain FFT method applied to axially symmetrical electromagnetic resonant devices , 1990 .

[12]  E. Martin,et al.  Study of TE/sub 0/ and TM/sub 0/ modes in dielectric resonators by a finite difference time-domain method coupled with the discrete Fourier transform , 1991 .