Method and computer program product for stable integral equation models
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United States of America Patent
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Oct 20, 1998
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N/A
app pub date -
Jan 14, 1997
filing date -
Jan 14, 1997
priority date (Note) -
Expired
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Abstract
A method and computer program product are provided for implementing a stable integral equation model for both the time and frequency domains. The stabilization method of the invention is applicable to electric field integral equation (EFIE) formulations, to magnetic field integral equation (MFIE) formulations, and to combined field integral equation (CFIE) formulations. For example, an EFIE formulation can be used in the circuit domain called partial element equivalent circuit (PEEC). Each volume cell is subdivided into a finite number of partitions. A partial inductance term is calculated consisting of a summation over all the finite number of partitions in each cell. Each surface cell is subdivided into a finite number of subcells. A coefficient of potential term is calculated consisting of a summation over all the finite number of subcells in each surface cell. Both the partial inductances and the coefficients of potential are calculated without increasing the number of unknowns. In addition, a damping resistor is added in parallel to the calculated partial inductance in each cell to reduce unwanted resonances outside the useful frequency range.
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