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Electromagnetic analysis demonstrates velocity-dependent radiation pattern shifts across a moving plasma layer, indicating maximal wave distortion when wave and plasma frequencies match.
The electromagnetic radiation from a slot antenna in a conducting plane coated with a moving isotropic cold plasma layer is considered. It is assumed that the direction of motion of the layer is across the slot, which is taken to be infinitely long. An integral representation for the field radiated through the plasma layer is obtained and evaluated asymptotically in the far zone by the method of steepest descents. The migration of the poles in the integrand of this integral representation as the speed of the slab is varied is discussed and related to several calculated radiation patterns. It is found that the motion of the plasma layer has the greatest effect on the radiation pattern when the wave frequency and plasma frequency are nearly equal.
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K. F. Casey (1971) studied this question.
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