Title :
Mesh grading and cutoff frequencies in the frequency-domain TLM method
Author :
Hesselbarth, J. ; Vahldieck, R.
Author_Institution :
Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
The Frequency-Domain Transmission Line Matrix (FDTLM) method is extended to the calculation of cutoff frequencies in waveguides. The influence of mesh grading on the accuracy of the solutions is analyzed for different kinds of nodes, showing clear differences in numerical dispersion between them. Analytical solutions give further insight into the behaviour of the FDTLM method.
Keywords :
S-matrix theory; S-parameters; frequency-domain analysis; transmission line matrix methods; waveguide theory; cutoff frequencies; frequency-domain TLM method; mesh grading; numerical dispersion; transmission line matrix method; waveguides; Cutoff frequency; Eigenvalues and eigenfunctions; Frequency domain analysis; Geometry; Matrix converters; Propagation constant; Scattering parameters; Transmission line matrix methods; Transmission lines; Voltage;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.700671
