Retarded time absorbing boundary conditions

• Published in: IEEE transactions on antennas and propagation Vol. 42; no. 8; pp. 1059 - 1064
• Main Authors: Berntsen, S., Hornsleth, S.N.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.1994; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Boundary conditions; Boundary value problems; Computational modeling; Differential equations; Exact sciences and technology; Finite difference methods; Integral equations; Near-field radiation pattern; Partial differential equations; Propagation in continous media; Radiocommunications; Radiowave propagation; Space technology; Telecommunications; Telecommunications and information theory; Time domain analysis; Near field; Absorption; Time domain method; Theoretical study; Electromagnetic field; Boundary condition; Finite difference method
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/8.309997

Over the past few years simulations of electromagnetic problems in three dimensions using the finite difference time domain (FDTD) method have become increasingly popular. A major problem in such simulations is the truncation of the computational domain. A formulation of this boundary problem using retarded time values of the field inside the computational domain is suggested, and hence the name retarded time absorbing boundary condition (RT-ABC). This formulation allows the boundary to be situated in the near field of the problem and thereby reduces the necessary computational domain, and the present formulation allows error estimates for the numerically calculated fields.< >