DocumentCode :
903631
Title :
Optimized absorbing boundary conditions for the analysis of planar circuits using the finite difference time domain method
Author :
Railton, C.J. ; Daniel, Elizabeth M. ; Paul, Dominique-Lynda ; McGeehan, Joseph P.
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
Volume :
41
Issue :
2
fYear :
1993
fDate :
2/1/1993 12:00:00 AM
Firstpage :
290
Lastpage :
297
Abstract :
It is shown that the description of absorbing boundary condition algorithms (ABCs) in terms of single incident plane waves does not provide sufficient information for choosing the best ABC for planar waveguide termination. A technique for optimizing the ABCs that results in a return loss from a wideband pulse less than -50 dB is demonstrated. This technique reduces the risk of loss of accuracy due to mode conversion at the boundary. The use of these optimized ABCs considerably improves analysis results for an important category of microstrip components. For boundaries transverse to the direction of propagation, it is shown that inaccuracy and late time instability can result if the boundary is placed in regions of high field strength
Keywords :
boundary-value problems; finite difference time-domain analysis; microstrip components; microwave circuits; absorbing boundary conditions; finite difference time domain method; high field strength; late time instability; microstrip components; planar circuits; planar waveguide termination; return loss; wideband pulse; Availability; Boundary conditions; Circuit analysis; Finite difference methods; Helium; Microwave circuits; Microwave theory and techniques; Optimization methods; Partial differential equations; Time domain analysis;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/22.216470
Filename :
216470
Link To Document :
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