Title :
The compensation of coarseness error in 2D TLM modeling of microwave structures
Author :
Mueller, U. ; So, P.P.M. ; Hoefer, W.J.R.
Author_Institution :
Dept. of Electr. Eng., Ottawa Univ., Ont., Canada
Abstract :
The origin of the coarseness error in two-dimensional TLM (transmission line matrix) meshes is investigated, and a method for compensating the coarseness effect without increasing the computational expenditure is presented. The coarseness error can be eliminated by modifying the properties of the nodes situated at sharp corners or edges. The compensation is achieved by adding reactive stubs to the corner nodes. As a result, relatively coarse TLM meshes may be used to obtain highly accurate results. The efficiency and accuracy of this method are demonstrated by comparison with analytically exact solutions. The savings in computational expenditure are typically three orders of magnitude in 2D-TLM simulations.<>
Keywords :
computational complexity; finite element analysis; modelling; transmission line theory; 2D TLM modeling; accurate results; adding reactive stubs; coarse TLM meshes; coarse meshes; coarseness error compensation; computational savings; corner nodes; edges; microwave structures; sharp corners; transmission line matrix; Arm; Conductors; Delay effects; Dielectric constant; Electromagnetic fields; Electromagnetic waveguides; Energy storage; Frequency; Transmission line theory; Waveguide theory;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.187990
