Rc. Mcphedran et al., ON-AXIS DIFFRACTION BY PERFECTLY CONDUCTING CAPACITIVE GRIDS, Journal of electromagnetic waves and applications, 10(8), 1996, pp. 1085-1111
We describe a formulation for the diffraction of a plane wave normally
incident on a square array of perfectly conducting cylinders of speci
fied length. This is a particular case of a thick capacitive grid, for
which no previous rigorous model exists. The formulation is based on
a modal description of the fields between the cylinders, and methods a
re specified for the determination of the three types of mode (TE, TM
and TEM). Numerical tests on the formulation and examples of its resul
ts are presented.