FDTD analysis of dielectric resonators with curved surfaces

In this paper, the finite-difference time-domain (FDTD) method is applied to calculate the resonant frequency of dielectric resonators (DRs) with curved surface. The contour-path integral FDTD (CFDTD) is modified to deal with the curved surface of the dielectric body while the traditional rectangular cells are maintained. Results are compared with theoretical values and staircase approximation, and show that the present method is more accurate than the staircase approximation.

[1]  Allen Taflove,et al.  Computational Electrodynamics the Finite-Difference Time-Domain Method , 1995 .

[2]  K. S. Yee,et al.  Conformal finite difference time domain (FDTD) with overlapping grids , 1992, IEEE Antennas and Propagation Society International Symposium 1992 Digest.

[3]  Kwai-Man Luk,et al.  Theory and experiment of an aperture-coupled hemispherical dielectric resonator antenna , 1995 .

[4]  Allen W. Glisson,et al.  Computed Modal Field Distributions of Isolated Dielectric Resonators , 1984 .

[5]  Ahmed A. Kishk,et al.  Slot excitation of the dielectric disk radiator , 1995 .

[6]  Allen W. Glisson,et al.  Computed Modal Field Distributions for Isolated Dielectric Resonators , 1984 .

[7]  J. S. Chen,et al.  Conformal hybrid finite difference time domain and finite volume time domain , 1994 .

[8]  C. Wang,et al.  Mixed modes cylindrical planar dielectric resonator filters with rectangular enclosure , 1995, Proceedings of 1995 IEEE MTT-S International Microwave Symposium.

[9]  M. J. Nunez,et al.  FDTD method coupled with FFT: A generalization to open cylindrical devices , 1994 .

[10]  Allen Taflove,et al.  Finite-difference time-domain modeling of curved surfaces (EM scattering) , 1992 .

[11]  Richard W. Ziolkowski,et al.  A Three-Dimensional Modified Finite Volume Technique for Maxwell's Equations , 1990 .

[12]  K. S. Yee,et al.  Conformal finite-different time-domain (FDTD) with overlapping grids , 1992 .

[13]  John Litva,et al.  Fast finite-difference time-domain analysis of resonators using digital filtering and spectrum estimation techniques , 1992 .

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

[15]  Xiao-Peng Liang,et al.  Modeling of cylindrical dielectric resonators in rectangular waveguides and cavities , 1993, 1993 IEEE MTT-S International Microwave Symposium Digest.

[16]  Kwai-Man Luk,et al.  Analysis of aperture coupled rectangular dielectric resonator antenna , 1994 .

[17]  A. Vegas,et al.  Computation of resonant frequencies and quality factors of open dielectric resonators by a combination of the finite-difference time-domain (FDTD) and Prony's methods , 1992, IEEE Microwave and Guided Wave Letters.