Title :
Spurious modes caused by absorbing boundary conditions
Author_Institution :
Inst. of Radio Frequency Technol., German Aerosp. Res. Establ., Oberpfaffenhofen, Germany
Abstract :
Spurious modes can occur in the analysis of radiating structures, if absorbing boundary conditions (ABCs) are used. They can be put down to complex eigensolutions of the enclosed region, of which the wavenumbers are computed for ABCs of different order. The occurrence of spurious solutions is shown for a single microstrip line, analyzed with the method of lines (MoL) and absorbing lateral boundaries.
Keywords :
eigenvalues and eigenfunctions; electromagnetic wave absorption; finite difference methods; method of lines; microstrip lines; waveguide theory; absorbing boundary conditions; absorbing lateral boundaries; complex eigensolutions; enclosed region; finite difference method; method of lines; microstrip line; radiating structures; spurious modes; spurious solutions; wavenumbers; Boundary conditions; Microstrip;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1998. IEEE
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-4478-2
DOI :
10.1109/APS.1998.702132
