Title :
A higher-order boundary condition for finite element mesh truncation in open region scattering problems
Author :
Khebir, A. ; Kouki, A.B. ; Mittra, R.
Author_Institution :
Electromagn. Commun. Lab., Illinois Univ., Urbana, IL, USA
Abstract :
A higher order absorbing condition (ABC) is derived for finite-element mesh truncation, which, unlike many of the available ABCs, incorporates both the lower and higher order harmonics in its derivation. It is demonstrated that the use of the higher order ABC results in a significant improvement over the Bayliss, Grunzburger, and Turkel (BGT) boundary conditions (1982), when used in conjunction with the finite-element approach to solving a variety of scattering problems. Numerical results are presented for a perfectly conducting circular cylinder and wedge.<>
Keywords :
boundary-value problems; electromagnetic wave scattering; finite element analysis; partial differential equations; absorbing condition; electromagnetic scattering; finite element mesh truncation; higher order harmonics; higher-order boundary condition; lower order harmonics; open region scattering; perfectly conducting circular cylinder; perfectly conducting wedge; Boundary conditions; Conductors; Electromagnetic scattering; Equations; Finite element methods; Laboratories; Moment methods; Radar cross section; Radar scattering; Tellurium;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115341
