Title :
The implementation of time-domain diakoptics in the FDTD method
Author :
Huang, Tian-Wei ; Houshmand, Bijan ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
11/1/1994 12:00:00 AM
Abstract :
The time-domain diakoptics is implemented in the finite-difference time-domain (FDTD) method with two types of connecting interfaces: i) directional interface (TLM-type), and ii) total-field interface (FDTD-type). The FDTD-type interface provides a more efficient way to realize time-domain diakoptics than TLM, especially for device optimization problems. To emulate the TLM-type interface in FDTD, two novel algorithms are developed in this paper. One is to implement an ultra-wideband absorbing boundary on the excitation plane during excitation. The other is to separate directional waves without the knowledge of incident waves. For a large circuit with cascaded modules, sequential and parallel algorithms are provided to connect them. With these connecting algorithms, time-domain diakoptics is one candidate method to realize modular and parallel computation in FDTD simulations. The validity of these algorithms is confirmed by comparison with simulated results from Microwave SPICE
Keywords :
circuit analysis computing; finite difference time-domain analysis; microwave circuits; network topology; nonlinear network analysis; parallel algorithms; FDTD method; FDTD simulations; TLM-type; cascaded modules; device optimization problems; directional interface; directional waves; excitation plane; finite-difference time-domain method; parallel algorithms; sequential algorithms; time-domain diakoptics; total-field interface; ultra-wideband absorbing boundary; Circuit simulation; Computational modeling; Concurrent computing; Diakoptics; Finite difference methods; Joining processes; Parallel algorithms; SPICE; Time domain analysis; Ultra wideband technology;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on