were 1 min is the minimum wavelength associated to
the maximum frequency of the spectrum and D is the
maximum dimension of the structure, is not generally
observed and it is therefore necessary to use an
equivalent network representation with distributed
parameters. Each conducting element has been divided
into an appropriate number of elementary cells in
order to minimize the discretization error and to bear
in mind the propagation phenomena. Each cell is
made up of resistances and inductances placed in