To analyze FSS' s sensitivity to different incidences, the
plane waves excited with different incident angles are used.
The diagram of curves from CST Microwave Solver, as shown
as fig.3, illustrated that transmission coefficient for various
oblique angles of incidence. Fig.3 (a) and Fig.3 (b) indicated
the transmission characteristics for TE-polarized waves and
TM-polarized waves, respectively. During the angles getting
larger, selectivity band width of TE-polarized waves gets larger;
while smaller of TM-polarized waves. In spite of that, there is
scarcely any deviation to center frequencies of two bands for
TE-polarized waves and TM-polarized waves, along with the
process that oblique angles of incidence become larger.
Therefore, fig.3 confirms that the FSS has a stable transmission
response at oblique TE and TM polarization incidence.