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Luc Knockaert 

 
 

Telephone +32(0)92643328
Fax +32(0)92649969
E-mail luc.knockaert@intec.ugent.be
Address Sint-Pietersnieuwstraat, 41

9000, Gent, Belgium

 



Luc Knockaert received the M. Sc. Degree in physical engineering, the M. Sc. Degree in telecommunications engineering and the Ph. D. Degree in electrical engineering from Ghent University, Belgium, in 1974, 1977 and 1987, respectively. From 1979 to 1984 and from 1988 to 1995 he was working in North-South cooperation and development projects at the Universities of the Democratic Republic of the Congo and Burundi. He is presently a professor affiliated with INTEC-IBCN (member of  iMinds) and INTEC-EM. His current interests are the application of linear algebra and adaptive methods in signal estimation, model order reduction, machine learning, scientific computing and computational electromagnetics.  As author or co-author he has contributed to more than 120 international  peer-reviewed journal papers. He is a member of MAA, SIAM and a senior member of IEEE.


Journal Papers  
 
paper
L. Knockaert
Matrix nearness-based guaranteed passive system approximation
Systems and Control Letters , vol. 62, no. 9, 2013

 

paper
 K. Chemmangat, T. Dhaene, L. Knockaert
Scalable macromodelling of microwave system responses using sequential sampling with path-simplexes
Electronics Letters, vol. 49, no. 15, 2013

 

paper
E. R. Samuel, F. Ferranti, L. Knockaert, T. Dhaene
Passivity-preserving parameterized model order reduction using singular values and matrix interpolation
IEEE Trans. CPMT,  vol. 3, no. 6, 2013

 

paper
E. R. Samuel, L. Knockaert, F. Ferranti, T. Dhaene
Guaranteed passive parameterized macromodeling by using Sylvester state-space realizations
IEEE Trans. on Microwave Theory and Techniques, vol. 61, no. 4, 2013

 

paper
D. Deschrijver, L. Knockaert, T. Dhaene
A barycentric vector fitting algorithm for efficient macromodeling of linear multiport systems
IEEE Microwave and Wireless Components Letters, vol. 23, no. 2, 2013

 

paper
O. Salazar Celis, A. Cuyt, D. Deschrijver, D. Vande Ginste, T. Dhaene, L. Knockaert
Macromodeling of high-speed interconnects by positive interpolation of vertical segments
Applied Mathematical Modelling, vol. 3, no. 7, 2013

 

paper
L. Knockaert, F. Ferranti, T. Dhaene
Generalized eigenvalue passivity assessment of descriptor systems with applications to symmetric and singular systems
International Journal of Numerical Modelling, vol. 26, no. 1, 2013

 

paper
F. Ferranti, L. Knockaert, T. Dhaene, G. Antonini
Parametric macromodeling for S-parameter data based on internal
nonexpansivity
International Journal of Numerical Modelling, vol. 26, no. 1, 2013

 

paper
F. Ferranti, T. Dhaene, L. Knockaert
Compact and passive parametric macromodeling using reference macromodels and positive interpolation operators
IEEE Trans. CPMT,  vol. 2, no. 12, 2012

 

paper
K. Chemmangat, F. Ferranti, L. Knockaert, T. Dhaene
Gradient-based optimization using parametric sensitivity macromodels
International Journal of Numerical Modelling, vol. 25, no. 4, 2012

 

paper
D. Spina, F. Ferranti, G. Antonini, T. Dhaene, L. Knockaert, D. Vande Ginste
 Time-domain Green's function-based parametric sensitivity analysis of multiconductor transmission lines
IEEE Trans. CPMT, vol. 2, no. 9, 2012

 

paper
D. Spina, F. Ferranti, T. Dhaene, L. Knockaert, G. Antonini, D. Vande Ginste
 Variability analysis of multiport systems via polynomial-chaos expansion
IEEE Transactions on Microwave Theory and Techniques,
vol. 60, no. 8, 2012

 

paper
L. Knockaert
Upper bounds for Fourier transforms of exponential functions
Complex Variables and Elliptic Equations, vol. 57, no. 10, 2012

 

paper
F. Ferranti, L. Knockaert, T. Dhaene, G. Antonini,
Parametric macromodeling based on amplitude and frequency scaled systems with guaranteed passivity
International Journal of Numerical Modelling, vol. 25, no. 2, 2012

 

paper
F. Ferranti, M. Nakhla, G. Antonini, T. Dhaene, L. Knockaert, A. E. Ruehli
Interpolation-based parameterized model order reduction of delayed systems
IEEE Transactions on Microwave Theory and Techniques,
vol. 60, no. 3, 2012

 

paper
F. Ferranti, T. Dhaene, L. Knockaert, G. Antonini, A. Ciccomancini Scogna
Scalable compact models for fast design optimization of complex electromagnetic systems
International Journal of RF and Microwave Computer-Aided Engineering, vol. 22, no. 1, 2012

 

paper
F. Ferranti, G. Antonini, T. Dhaene, L. Knockaert, A. Orlandi
Compact and accurate models of large single-wall carbon-nanotube interconnects
IEEE Trans. Electromagnetic Compatibility, vol. 53, no. 4, 2011

 

paper
F. Ferranti, M. Nakhla, G. Antonini, T. Dhaene, L. Knockaert, A. E. Ruehli
Multipoint full-wave model order reduction for delayed PEEC models with large delays
IEEE Trans. Electromagnetic Compatibility, vol. 53, no. 4, 2011

 

paper
L. Knockaert
A class of scaled Bessel sampling theorems
IEEE Trans. Signal Processing, vol. 59, no. 10, 2011

 

paper
F. Ferranti, L. Knockaert, T. Dhaene
Passivity-preserving parametric macromodeling by means of scaled and shifted state-space systems
IEEE Trans. Microwave Theory Tech., vol. 59, no. 10, 2011

 

paper
F. Ferranti, G. Antonini, T. Dhaene, L. Knockaert
Passivity–preserving interpolation-based parameterized model order reduction of PEEC models based on scattered grids
International Journal of Numerical Modelling, vol. 24, no. 5, 2011

 

paper
D. Deschrijver, G. Avolio, D. Schreurs, T. Dhaene, G. Crupi, L. Knockaert
Microwave small-signal modelling of FinFETs using multi-parameter rational fitting method
Electronics Letters, vol. 47, no. 19, 2011

 

paper
K. Chemmangat, F. Ferranti, L. Knockaert, T. Dhaene
Parametric macromodeling for sensitivity responses from tabulated data
IEEE Microwave and Wireless Components Letters, vol. 21, no. 8, 2011

 

paper
F. Ferranti, G. Antonini, T. Dhaene, L. Knockaert, A. Ruehli
Physics-based passivity-preserving parameterized
model order reduction for PEEC circuit analysis
IEEE Trans. CPMT, vol. 1, no. 3, 2011

 

paper
L. Knockaert, T. Dhaene, F. Ferranti, D. De Zutter
Model order reduction with preservation of passivity, non-expansivity and Markov moments
Systems and Control Letters , vol. 60, no. 1, 2011

 

paper
F. Ferranti, L. Knockaert, T. Dhaene, G. Antonini
Passivity-Preserving Parametric Macromodeling for Highly Dynamic Tabulated Data Based on Lur'e Equations
IEEE Trans. Microwave Theory Tech., vol. 58, no. 12, 2010

 

paper
D. Deschrijver, L. Knockaert and T. Dhaene
Improving robustness of vector fitting to outliers in data
Electronics Letters, vol. 46, no. 17, 2010

 

paper
I. Couckuyt, F. Declercq, T. Dhaene, H. Rogier and L. Knockaert
Surrogate-based infill optimization applied to electromagnetic problems
Int. J. of RF Microwave Computer-Aided Engineering, vol. 20, no. 5, 2010

 

paper
F. Ferranti, L. Knockaert and  T. Dhaene
Guaranteed passive parameterized admittance-based macromodeling
IEEE Trans. on Advanced Packaging, vol. 33, no. 3,  2010

 

paper
F. Ferranti, L. Knockaert, T. Dhaene, G. Antonini and D.  De Zutter
Parametric macromodeling for tabulated data based on internal passivity
IEEE Microwave and Wireless Components Letters, no. 99, 2010

 

paper
F. Ferranti, G.  Antonini, T. Dhaene and L. Knockaert
Guaranteed passive parameterized model order reduction of the partial element equivalent circuit (PEEC) method
IEEE Transactions on Electromagnetic Compatibility, no. 99, 2010

 

paper
F. Ferranti, G.  Antonini, T. Dhaene and L. Knockaert
Parametric macromodeling of lossy and dispersive multiconductor transmission lines
IEEE Trans. on Advanced Packaging, vol. 33, no. 2, 2010

 

paper
F. Ferranti, Y. Rolain, L. Knockaert and T. Dhaene
Variance weighted vector fitting for noisy frequency responses
IEEE Microwave and Wireless Component Letters, vol. 20, no. 4, 2010

 

paper
F. Ferranti,  L. Knockaert and T. Dhaene
Passivity-preserving interpolation-based parameterized macromodeling of scattered S-data
IEEE Microwave and Wireless Component Letters, vol. 20, no. 3, 2010

 

paper
W. Hendrickx, D. Deschrijver, L. Knockaert and T. Dhaene
Magnitude vector fitting to interval data
Mathematics and Computers in Simulation, vol. 80, no. 3,  2009

 

paper
F. Ferranti, L. Knockaert and T. Dhaene
Parameterized S-parameter based macromodeling with guaranteed passivity
IEEE Microwave and Wireless Component Letters, vol. 19, no. 10, 2009

 

paper
D. Vande Ginste,  L. Knockaert and D. De Zutter
Error control in the perfectly matched layer based fast multipole algorithm
J. of Computational Physics,  no. 228, 2009

 

paper
F. Ferranti,  D. Deschrijver, L. Knockaert and T. Dhaene
Fast parametric macromodeling of frequency responses using parameter derivatives
IEEE Microwave and Wireless Component Letters, vol. 18, no. 12, 2008

 

paper
L. Knockaert,  D. De Zutter and T. Dhaene
Adaptive interpolation based on Polya frequency functions
IEEE Trans. Signal Processing, vol. 56, no. 10, 2008

 

paper
L. Knockaert and D. De Zutter
On the complex symmetry of the Poincare-Steklov operator
Progress in Electromagnetic Research B, vol. 7, 2008

 

paper
L. Knockaert
A simple and accurate algorithm for barycentric rational interpolation
IEEE Signal Processing Lett., vol. 15, 2008

 

paper
L. Knockaert, D. De Zutter, G. Lippens and H. Rogier
On the Schur complement form of the Dirichlet-to-Neumann operator
Wave Motion, vol. 45, 2008

 

paper
H. Rogier, D. De Zutter and   L. Knockaert
Two-dimensional transverse magnetic scattering using an exact surface admittance operator
Radio Science, vol. 42, no. 3, June  2007

 

paper
D. De Zutter, H. Rogier, L. Knockaert and J. Sercu
Surface current modelling of the skin effect for on-chip interconnections
IEEE Trans. Advanced Packaging, Part B, vol. 30, no. 2, May  2007

 

paper
L. Knockaert
Optimizing Green's functions in grounded layered media with artificial boundary conditions
Progress in Electromag. Res., vol. 62,  2006

 

paper
L. Knockaert, G. Lippens and D. De Zutter
Reduced order modeling via oblique projections on a bandlimited Kautz basis
IEEE Trans. CAS. I, vol. 53, no. 7, July 2006

 

paper
L. Knockaert and T. D'Haene
Orthonormal bandlimited Kautz sequences for global system modeling from piecewise rational models
IEEE Trans. CAD., vol. 25, no. 7, July 2006

 

paper
L. Knockaert
Necessary and sufficient conditions for the origin to belong to the numerical range of a matrix
WSEAS Trans. Mathematics, vol. 5, no. 12, Dec. 2006

 

paper
L. Knockaert
Multinomial Lagrange-Bernstein approximants
IEEE Signal Processing Lett., vol. 13, no. 6, June 2006

 

paper
M. Bekara, L.  Knockaert, A. K.   Seghouane and G.  Fleury
A model selection approach to signal denoising using Kullback's symmetric divergence
Signal Processing, vol.  86, no. 7, July 2006

 

paper
L. Knockaert, F. Olyslager and D. Vande Ginste
On the evaluation of self-patch integrals in the method of moments
Microwave Opt. Technology Letters, vol. 47, no. 1, Oct. 2005

 

paper
D. De Zutter and L. Knockaert
Skin effect modeling based on a differential surface admittance operator
IEEE Trans. Microwave Theory Tech., vol. 53, no. 8, Aug. 2005

 

paper
L. Knockaert
A note on strict passivity
Systems and Control Letters, vol. 54, no. 9,  Sep. 2005

 

paper
L. Knockaert, H. Rogier  and D. De Zutter
An FFT-based signal identification approach for obtaining the propagation constants of the leaky modes in layered media
Int. J. Electron. Commun. (AEU), vol. 59, 2005

 

paper
B. Denecker, L. Knockaert, F. Olyslager, and D. De Zutter
A new state-space based algorithm to assess the stability of the finite-difference time-domain method for 3D finite inhomogeneous problems
Int. J. Electron. Commun. (AEU), vol. 58, no. 5,  2004

 

paper
L. Knockaert, D. De Zutter and G. Lippens
Laguerre-based bandlimited reduced-order modeling
IEEE Trans. Microwave Theory Tech., vol. 52, no. 9, Sep. 2004

 

paper
L. Knockaert
On Bernstein-Kreiss matrix power bounds
WSEAS Trans. Mathematics, vol. 3, no. 3, July 2004

 

paper
E. Laermans, L. Knockaert and D. De Zutter
Two-dimensional method of moments modelling of lossless overmoded transverse magnetic cavities
J. Computational Physics, vol. 198, July 2004

 

paper
L. Knockaert, J. Sercu and D.   De Zutter
Generalized Poisson-Neumann polygonal basis functions for the electromagnetic simulation of complex planar structures
IEEE Trans. Microwave Theory Tech., vol. 52, no. 3,  March 2004

 

paper
B. Denecker, F. Olyslager, L. Knockaert and D. De Zutter
Generation of FDTD subcell equations by means of reduced order modeling
IEEE Trans. Antennas Propagation, vol. 51, no. 8,  Aug. 2003

 

paper
L. Knockaert
Best upper bounds based on the arithmetic-geometric mean inequality
Archives of Inequalities and Applications, vol. 1,   2003

 

paper
L. Knockaert
On scale and concentration invariance in entropies
Information Sciences, vol. 152,  June  2003

 

paper
L. Knockaert and D. De Zutter
Stable Laguerre-SVD reduced-order modeling
IEEE Trans. Circuits Syst. I, vol. 50, no. 4,  April  2003

 

abstract
H. Rogier,  L. Knockaert and D. De Zutter
Fast calculation of the propagation constants of leaky and Berenger modes of planar and circular dielectric waveguides terminated by a perfectly matched layer
Microwave Opt. Technol. Lett., vol. 27, no. 3, May  2003

 

paper
L. Knockaert and D. De Zutter
On the completeness of eigenmodes in a parallel plate waveguide with a perfectly matched layer termination
IEEE Trans. Antennas Propagation, vol. 50, no. 11,  Nov. 2002

 

paper
L. Knockaert and D. De Zutter
Best bells for the scattering by perfectly conducting cylinders
Journal of Electromagnetic Waves and Appl., vol. 16, no. 11, 2002

 

paper
L. Knockaert, D. De Zutter, F. Olyslager, E. Laermans and J. De Geest
Recovering lossy multiconductor transmission line parameters from impedance or scattering representations
IEEE Trans. Advanced Packaging, vol. 25,   no. 2, May 2002

 

paper
L. Knockaert
Equivalent formulations of the Muntz-Szasz completeness condition for systems of complex exponentials
Journal of the Franklin Institute, vol. 339, no. 1, Jan. 2002

 

paper
L. Knockaert
A class of positive isentropic time-frequency distributions
IEEE Signal Processing Letters, vol. 9, no. 1, Jan.   2002

 

paper
L. Knockaert
On orthonormal Muntz-Laguerre filters
IEEE Trans. on Signal Processing, vol. 49, no. 4, April  2001

 

paper
L. Knockaert
Rational rooftop functions for convex quadrilaterals
Microwave Opt. Technol. Lett., vol. 27, no. 6, Dec.  2000

 

paper
L. Knockaert
Comments on "Resolution in time-frequency"
IEEE Trans. on Signal Processing, vol. 48, no. 12, Dec. 2000

 

paper
L. Knockaert and D. De Zutter
Truncation bounds for the fast multipole method based on analytic Fourier series
Electromagnetics, vol. 20, no. 5, Sept.   2000

 

paper
L. Knockaert and D. De Zutter
Laguerre-SVD reduced order modeling
IEEE Trans. Microwave Theory Techn., vol. 48, no. 9, Sept. 2000

 

paper
B. Denecker, F. Olyslager, L. Knockaert and D. De Zutter
Automatic generation of subdomain models in 2-D FDTD using reduced order modeling
IEEE Microw. Guided Wave Lett., vol. 10, no. 8, Aug.  2000

 

paper
L. Knockaert
A recursive algorithm for the reconstruction of dielectric profiles
Int. J. Electron. Commun (AEU), vol. 54, no. 4, 2000

 

paper
L. Knockaert
Fast Hankel transform by fast sine and cosine transforms: the Mellin connection
IEEE Trans. on Signal Processing, vol. 48, no. 6, June  2000

 

paper
L. Knockaert  and D. De Zutter
Regularization of the moment matrix solution by a non-quadratic conjugate gradient method
IEEE Trans. Antennas Propagat., vol. 48, no. 5, May  2000

 

abstract
L. Knockaert
The Strang-Fix interpolation error bound in an operator setting
IEEE Signal Processing Letters, vol. 7, no. 5, May  2000

 

paper
L. Knockaert  and D. De Zutter
On the stretching of Maxwell's equations in general orthogonal coordinate systems and the perfectly matched layer
Microwave Opt. Technol. Lett., vol. 24, no. 1, Jan.  2000

 

abstract
L. Knockaert  and D. De Zutter
Passive reduced order multiport modeling:the Pade-Laguerre, Krylov-Arnoldi-SVD connection
Int. J. Electron. Commun (AEU), vol. 53, no. 5, 1999

 

paper
L. Knockaert, B. De Backer and D. De Zutter
SVD compression, unitary transforms and computational complexity
IEEE Trans. on Signal Processing, vol. 47, no. 10, Oct.  1999

 

paper
L. Knockaert and F. Olyslager
Modified B-splines for the sampling of band-limited functions
IEEE Trans. on Signal Processing, vol. 47, no. 8, Aug. 1999

 

paper
L. Knockaert, P. Van den Abeele and D. De Zutter
Surface impedance of cylinders and wedges : A Neumann approach
Int. J. Electron. Commun. (AEU), vol. 53, no. 1, 1999

 

paper
L. Knockaert and D. De Zutter
An exponential truncation bound for analytic Fourier series
IEEE Trans. on Signal Processing, vol. 46, no. 3, March 1998

 

paper
L. Knockaert and D. De Zutter
Surface impedance of conducting cylinders
Electromagnetics, vol. 17, no. 6, pp. 589-604, 1997 

 

paper
L. Knockaert, F. Olyslager and D. De Zutter
The diaphanous wedge
IEEE Trans. Antennas Propagat., vol. 45, no. 9, pp. 1374-1381, Sept. 1997 

 

paper
L. Knockaert
The Barankin bound and threshold behavior in frequency estimation
IEEE Trans. on Signal Processing, vol. 45, no. 9, pp. 2398-2401, Sept. 1997 

 

paper
L. Knockaert
Maximum a posteriori maximum entropy order determination
IEEE Trans. on Signal Processing, vol. 45, no. 6, pp. 1553-1559, June 1997 

 

paper
L. Knockaert
A generalized Mobius transform, arithmetic Fourier transforms and primitive roots
IEEE Trans. on Signal Processing, vol. 44, no. 5, pp. 1307-1310, May 1996 

 

abstract
L. Knockaert
A generalized Mobius transform and arithmetic Fourier transforms
IEEE Trans. on Signal Processing, vol. 42, no. 11, pp. 2967-2971, Nov. 1994 

 

paper
L. Knockaert
A class of statistical and spectral distance measures based on Bose-Einstein statistics
IEEE Trans. on Signal Processing, vol. 41, no. 11, pp. 3171-3174, Nov. 1993 

 

paper
L. Knockaert
Stability of linear predictors and numerical range of shift operators in normed spaces
IEEE Trans. on Information Theory, vol. 38, no. 5, pp. 1483-1486, Sep. 1992 

 

paper
L. Knockaert
A general Gauss theorem for evaluating singular integrals over polyhedral domains
Electromagnetics, vol. 11, pp. 269-280, 1991 

 

paper
L. Knockaert
A note on the relationship between the conjugate gradient method and polynomials orthogonal over  the spectrum of a linear operator
IEEE Trans. Antennas Propagat., vol. AP-35, pp. 1089-1091, Sep. 1987 

 

paper
L. Knockaert
A lattice orthogonalization technique for integrated square error minimization
IEEE Trans. Antennas Propagat., vol. AP-35, pp. 913-919, Aug. 1987 

 

paper
L. Knockaert
An order-recursive algorithm for estimating pole-zero models
IEEE Trans. Acoust.,Speech, Signal Processing, vol. ASSP-35, pp. 154-157, Feb. 1987 

 

paper
L. Knockaert
Comment on 'An upper bound on run-length coding entropy' 
Proc. IEEE, vol. 74, pp. 1284-1285, Sep. 1986 

 

paper
L. Knockaert and D. De Zutter
Integral equation for the fields inside a dielectric cylinder immersed in an incident E-wave
IEEE Trans. Antennas Propagat., vol. AP-34, pp. 1065-1067, Aug. 1986 

 

paper
L. Knockaert
A recursive algorithm for linear system identification 
IEEE Trans. Acoust., Speech, Signal Processing, vol. ASSP-34,  pp. 492-498, June 1986. 

 

paper
L. Knockaert
Parametric modeling of electromagnetic waveforms 
Electromagnetics, vol. 4, no. 4, pp. 415-430, 1984 

 

paper Symposium Papers
 
paper Enkele gedichten
 

Talk  
 
paper
L. Knockaert : Strict Passivity and Model Reduction
FREE workshop on behavioral modeling and approximation
University of Antwerp, Campus Middelheim, August 21, 2006

 


Unpublished Papers  
 
paper
L. Knockaert
Statistical thermodynamics and natural f-divergences

 

paper
L. Knockaert
Cauer transform based passivity enforcement : Laguerre expansion vs. Talbot quadrature

 

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