  The presence of wave tunneling and the 'growing evanescent envelope' for
field distributions in suitably designed, periodically layered stacks of
frequency selective surfaces (FSS) is discussed in this paper. Here it is shown
that a setup completely different completely different from the Pendry's lens
allows an analogous buildup of evanescently modulated waves. In particular, it
is shown how an interface resonance phenomenon similar to the one present at
the interface between metamaterials with oppositely signed constitutive
parameters may be induced by a proper choice of the periodicities of the FSS
stacks and the geometrical properties of these surfaces. The analysis is
performed through an equivalent transmission-line approach, and some physical
insights into this phenomenon are presented. Salient features, such as the
complete wave tunneling through the pair of cascaded FSS, each operating at its
bandgap, are presented and discussed.
