Advanced FVTD Simulation of Dielectric Resonator Antennas and Feed Structures
Keywords:
Advanced FVTD Simulation of Dielectric Resonator Antennas and Feed StructuresAbstract
This paper illustrates the application of the Finite- Volume Time-Domain (FVTD) method to the electromagnetic modeling of complex 3D antenna structures. The FVTD algorithm solves Maxwell's equations in a conformal polyhedral mesh, therefore permitting an accurate approximation of curved surfaces and a fine resolution of structural details. The flexibility of the unstructured mesh is coupled with a geometry-matched local time-stepping scheme to increase the computational efficiency. The FVTD algorithm is applied here to simulate probe-fed hemispherical dielectric resonator antennas. Emphasis of the investigation is placed on the modeling of fabrication details and their influence on the input impedance and resonance frequency of the device.
Downloads
References
N. K. Madsen, R. W. Ziolkowski, "A three-dimensional modified finite
volume technique for Maxwell's equations", Electromagnetics, vol. 10,
pp. 147-161, 1990
V. Shankar, A. H. Mohammadian, W. F. Hall, "A time-domain, finite-
volume treatment for the Maxwell equations", Electromagnetics, vol. 10,
pp. 127-145, 1990
P. Bonnet, X. Ferrieres, B. L. Michielsen, P. Klotz, J. L. Roumiguières,
"Finite-Volume Time Domain Method", Chapter 9 in Time domain
electromagnetics, edited by S. M. Rao, Academic Press, San Diego,
C. Fumeaux, D. Baumann, P. Leuchtmann, R. Vahldieck, "A generalized
local time-step scheme for efficient FVTD simulations in strongly
inhomogeneous meshes", IEEE Trans. Microwave Theory Tech. MTT-
(3), pp. 1067-1076, 2004
D. Baumann, C. Fumeaux, P. Leuchtmann, R. Vahldieck, "Generalized-
scattering-matrix extraction using the finite-volume time-domain
(FVTD) method", IEEE MTT-S Int. Microwave Symp. Dig., pp. 1701-
, June 2004
A. Petosa, A. Ittipiboon, Y. M. M. Antar, D. Roscoe, M. Cuhaci,
"Recent advances in dielectric-resonator antenna technology", IEEE
Antennas Propagat. Mag. 40(3), pp. 35-48, 1998
K. W. Leung, K. M. Luk, K. Y. A. Lai, D. Lin, "Theory and experiment
of probe fed dielectric resonator antenna", IEEE Trans. Antennas
Propagat. AP-41, pp. 1390-1398, 1993
K. W. Leung, K. K. Tse, K. M. Luk, E. K. N. Yung, "Cross-polarization
characteristics of a probe-fed hemispherical dielectric resonator
antenna", IEEE Trans. Antennas Propagat. AP-47(7), pp. 1228-1230,
D. Baumann, C. Fumeaux, P. Leuchtmann, R. Vahldieck, "Finite-
Volume Time-Domain (FVTD) Method and its Application to the
Analysis of Hemispherical Dielectric-Resonator Antennas", IEEE MTT-
S Int. Microwave Symp. Dig., pp. 985-988, June 2003
G.P. Junker, A.A. Kishk, A.W. Glisson, D. Kaifez, "Effect of fabrication
imperfections for ground-plane-backed dielectric-resonator antennas",
IEEE Antennas Propagat. Mag. 37(1), pp. 40-47, Feb. 1995
G. P. Junker, A. A. Kishk, A. W. Glisson, D. Kajfez, "Effect of an air
gap around the coaxial probe exciting a cylindrical dielectric resonator
antenna", Electronics Letters 30(3), pp. 177-178, 1994
G. P. Junker, A. A. Kishk, A. W. Glisson, D. Kajfez, "Effect of an air
gap on a cylindrical dielectric antenna operating in the TM01 mode",
Electronics Letters 30(2), pp. 97-98, 1994
A. C. Ludwig, "The definition of cross polarization", IEEE Trans.
Antennas Propagat. AP-21(1), pp. 116-119, 1973
A. A. Kishk, Y. Yin, A. W. Glisson, "Conical dielectric resonator
antennas for wide-band applications", IEEE Trans. Antennas Propagat.
AP-50(4), pp. 469-474, 2002
K. W. Leung, "Conformal strip excitation of dielectric resonator
antenna", IEEE Trans. Antennas Propagat. AP-48(6), pp. 961-967, 2000
