Abstract

Microwaves can exhibit Bragg diffraction effects when their wavelength becomes shorter than the spacing of grooves in a macroscopic grating of parallel grooves or ridges. For spacings of the order of a few centimeters, these effects will appear at about 10 GHz or above, or at lower frequencies if the incidence is closer to grazing. We study these diffraction phenomena for a general (3D) incidence of the microwave beam, both regarding their geometry, and regarding their intensity, using certain simple scattering approximations for the latter purpose.

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