The behavior of the fields around many common objects (e.g., wires, slots, and strips) converges to known static solutions. Incorporation of this a priori knowledge of the fields into the finite-difference time-domain (FDTD) algorithm provides one method for obtaining a more efficient characterization of these structures. Various methods of achieving this have been attempted; however, most have resulted in unstable algorithms. Recent investigations into the stability of FDTD have yielded criteria for stability, and this contribution for the first time links these criteria to a general finite-element formulation of the method. It is shown that the finite-element formulation provides a means by which FDTD may be generalized to include whatever a priori knowledge of the field is available, without compromising stability. Example results are presented for extremely narrow microstrip lines and wires.
|Translated title of the contribution||A new technique for the stable incorporation of static field solutions in the FDTD method for the analysis of thin wires and narrow strips|
|Pages (from-to)||1091 - 1096|
|Number of pages||6|
|Journal||IEEE Transactions on Microwave Theory and Techniques|
|Publication status||Published - Aug 1998|
Bibliographical notePublisher: Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Rose publication type: Journal article
Sponsorship: The authors would like to thank Prof. J.P. McGeehan for provision of facilities at the Centre for Communications Research, University of Bristol, Bristol, U.K.
- electromagnetic analysis
- FDTD methods
- Galerkin method
- finite-element methods