Spheroidal FDTD Method for Modeling 3-D Structures in Open and Closed Domains

Author

Al-Hasson, Saif A. ; Schoebel, Joerg

Author_Institution

Inst. fur Hochfrequenztech., Tech. Univ. Braunschweig, Braunschweig, Germany

Volume

63

Issue

7

fYear

2015

fDate

Jul-15

Firstpage

3055

Lastpage

3064

Abstract

A finite difference time domain (FDTD) method for analyzing spheroidal open and closed structures is introduced. Its mathematical equations are derived and discretized according to a designed geometrical model. The field´s singularities at the domain´s center and vertical axis are dealt with by deriving alternative field formulas. The method is then extended to open domains by deriving an absorbing boundary condition (ABC). The stability of the obtained model is determined by deriving its mathematical condition. Finally, the method is used to characterize spheroidal cavities and a conformal patch antenna.

Keywords

conformal antennas; electromagnetic wave absorption; finite difference time-domain analysis; geometry; microstrip antennas; 3D structure modelling; ABC; absorbing boundary condition; conformal patch antenna; finite difference time domain method; geometrical model; mathematical equation; spheroidal FDTD method; spheroidal closed structure; spheroidal open structure; Aerodynamics; Boundary conditions; Computational modeling; Finite difference methods; Magnetic fields; Mathematical model; Time-domain analysis; FDTD; Finite Difference Time Domain; Finite difference time domain (FDTD); spheroidal cavities; spheroidal patch;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2424249

Filename

7088581