Title :
Implicit incorporation of nonlinear elements for unconditionally stable FDTD analysis at coarse time-steps
Author :
Celuch-Marcysiak, M. ; Gwarek, W.K.
Author_Institution :
Inst. of Radioelectron., Warsaw Univ. of Technol., Poland
Abstract :
A hybrid 3D FDTD algorithm with a fully implicit interface to lumped nonlinear multiport devices is presented. The algorithm is unconditionally stable and converges for arbitrarily strong nonlinearities, high voltages and with any time-step satisfying the Courant condition. In case of a strongly nonlinear bipolar transistor, the new algorithm is by over two orders of magnitude faster than previous FDTD schemes with explicit or semi-implicit interfaces.
Keywords :
bipolar transistor circuits; finite difference time-domain analysis; lumped parameter networks; multiport networks; nonlinear network analysis; numerical stability; Courant condition; bipolar transistor; coarse time-step; convergence; hybrid 3D FDTD algorithm; implicit interface; lumped multiport device; nonlinear circuit element; unconditional stability; Bipolar transistors; Circuit simulation; Computational modeling; Electromagnetic modeling; Finite difference methods; Maxwell equations; Nonlinear equations; Semiconductor diodes; Time domain analysis; Voltage;
Conference_Titel :
Microwave Symposium Digest, 1996., IEEE MTT-S International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3246-6
DOI :
10.1109/MWSYM.1996.512193
