Title :
A passive circuit representation of boundary conditions for modelling periodic microwave structures using the TLM method
Author :
Romo, G. ; Smy, T.
Author_Institution :
Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada
Abstract :
We present a new circuit representation of the boundary conditions for simulating periodic microwave structures using the transmission line method (TLM). Our formulation leads to an algorithm that enforces the Bloch conditions at the cell sidewalls while preserving energy. This formulation eliminates the introduction of high frequency components which cause instability in previously published methods (Walter, M. et al., IEEE Trans. Microwave Theory Tech, vol.48. no.9, p.1574-6. 2000). Our approach is validated by simulating two structures: a periodically loaded microwave waveguide and a 2D array of dielectric materials. The dispersion relations obtained with this method compare very well with those obtained by alternative means.
Keywords :
dielectric devices; dispersion (wave); microwave devices; passive networks; periodic structures; transmission line matrix methods; waveguide theory; waveguides; Bloch conditions; TLM method; boundary conditions; dielectric materials; dispersion; passive circuit representation; periodic microwave structures; periodically loaded waveguide; transmission line matrix method; Boundary conditions; Circuit simulation; Distributed parameter circuits; Frequency; Loaded waveguides; Microwave circuits; Microwave theory and techniques; Passive circuits; Periodic structures; Transmission line theory;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1217564
