Title :
Optimized ADI-FDTD analysis of circularly polarized microstrip and dielectric resonator antennas
Author :
Sounas, Dimitrios L. ; Kantartzis, Nikolaos V. ; Tsiboukis, Theodoros D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Aristotle Univ. of Thessaloniki, Greece
Abstract :
A dispersion-optimized alternating-direction implicit finite-difference time-domain (ADI-FDTD) method is presented in this letter for the accurate modeling of complex electromagnetic structures. The analysis focuses on circularly polarized slot-coupled microstrip and dielectric resonator antennas. Introducing a class of three-dimensional spatial/temporal operators, the novel algorithm yields robust curvilinear grids which efficiently treat fine details and interfaces. Hence, the serious dispersion errors of the usual schemes, as time-steps surpass the Courant limit, are greatly reduced, enabling fast broad-band simulations. Numerical validation confirms the above merits via various realistic structures.
Keywords :
dielectric resonator antennas; dispersion (wave); finite difference time-domain analysis; microstrip antennas; alternating-direction implicit finite-difference time-domain; broadband simulations; circularly polarized microstrip; complex electromagnetic structures; dielectric resonator antennas; dispersion errors; numerical dispersion; optimized ADI-FDTD analysis; robust curvilinear grids; spatial operators; temporal operators; Dielectric resonator antennas; Electromagnetic wave polarization; Finite difference methods; Lattices; Microstrip antenna arrays; Microstrip antennas; Microstrip resonators; Optical polarization; Slot antennas; Time domain analysis; Alternating-direction implicit finite-difference time-domain (ADI-FDTD) method; circular polarization; dielectric resonator antennas (DRAs); numerical dispersion;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.863250
