Accurate computation of wide-band response of electromagnetic systems utilizing narrow-band information
- 1 April 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 39 (4) , 682-687
- https://doi.org/10.1109/22.76432
Abstract
Cauchy's technique for interpolating a rational function from samples of frequency responses and/or their derivatives is investigated. This technique can be used to speed up the numerical computations of parameters, including input impedance and RCS of any linear time-invariant electromagnetic system. This technique is utilized to find the far field of a slit conducting cylinder (TM incidence) over a bandwidth utilizing the information about the current and its derivatives at a few sample points. The numerical results are presented are in good agreement with exact computational data. This technique is a true interpolation/extrapolation technique as it provides the same defective result as the original electric field integral equation at a frequency which corresponds to the internal resonance of the closed structure.<>Keywords
This publication has 2 references indexed in Scilit:
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- E-field solution of TM-scattering from multiple perfectly conducting and lossy dielectric cylinders of arbitrary cross-sectionIEE Proceedings H Microwaves, Antennas and Propagation, 1986