Title :
An Elliptical Cylindrical FDTD Algorithm for Modeling Conformal Patch Antenna
Author :
Naser-Moghaddasi, Mohammad ; Sadeghzadeh, Ramezan Ali ; Ghiamy, Mohammad ; Neyestanak, Abbas Ali Lotfi ; Virdee, Bal S.
Author_Institution :
Fac. of Eng., Islamic Azad Univ., Tehran, Iran
Abstract :
An explicit finite-difference time-domain (FDTD) method is described using a uniform elliptical cylindrical spatial grid for time-domain Maxwell´s equations to accurately and efficiently model conformal elliptical cylindrical line-fed patch antennas and overcome stair-casing errors. Such errors are encountered when a Cartesian spatial grid is used for modeling curved surfaces. In addition, the method described in this paper obviates coding complexity encountered in modeling of curved surfaces which is manifest using CP-FDTD or CFDTD techniques. Characterizing expressions representing the absorbing boundary condition and Courant stability condition are presented and used to provide a highly effective algorithm to simulate conformal microstrip antennas. The proposed FDTD algorithm is validated against HFSS results showing excellent correlation.
Keywords :
Maxwell equations; conformal antennas; encoding; finite difference time-domain analysis; microstrip antennas; CFDTD technique; CP-FDTD technique; Courant stability condition; absorbing boundary condition; cartesian spatial grid; coding complexity; conformal elliptical cylindrical line-fed patch antenna; curved surface modeling; elliptical cylindrical FDTD algorithm; finite-difference time-domain method; stair-casing error; time-domain Maxwell equation; uniform elliptical cylindrical spatial grid; Equations; Finite difference methods; Mathematical model; Microstrip antennas; Power system stability; Time domain analysis; Absorbing boundary condition; Courant condition; conformal patch antenna; finite-difference time-domain (FDTD);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2010.2078450
