Orthonormal Vector Fitting: A Robust Macromodeling Tool for Rational Approximation of Frequency Domain Responses

@article{Deschrijver2007OrthonormalVF,
  title={Orthonormal Vector Fitting: A Robust Macromodeling Tool for Rational Approximation of Frequency Domain Responses},
  author={Dirk Deschrijver and Bart Haegeman and Tom Dhaene},
  journal={IEEE Transactions on Advanced Packaging},
  year={2007},
  volume={30},
  pages={216-225}
}
Vector Fitting is widely accepted as a robust macromodeling tool for approximating frequency domain responses of complex physical structures. In this paper, the Orthonormal Vector Fitting technique is presented, which uses orthonormal rational functions to improve the numerical stability of the method. This reduces the numerical sensitivity of the system equations to the choice of starting poles significantly and limits the overall macromodeling time 

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