Physical optics and the direction of maximization of the far-field average power

For the problem of physical optics scattering by a perfectly conducting plate of finite dimensions and arbitrary shape, attention is drawn to the fact that the directions in which the far-field average power is maximized can be easily determined for -polarization, while the same is not true for -polarization. Moreover, it is shown by means of an example that the directions of maximization for -polarization are not necessarily those for -polarization.