Neural networks for broad-band evaluation of complex permittivity using a coaxial discontinuity H. Acikgoz, Y. Le Bihan, O. Meyer and L. Pichon Eur. Phys. J. Appl. Phys., 39 2 (2007) 197-201 Published online: 30 May 2007 DOI: 10.1051/epjap:2007073