RADIO PHYSICS AND RADIO ASTRONOMY

An anomalous transmission mode and a trapped-mode are considered for scattering of a three-dimensional Gaussian wave beam on a two-dimensional two-element periodic semi-transparent array of rectangular wave guides segments. Results for a case of normal incidence of linearly polarized beam of circular cross-section on an array with a rectangular mesh are presented. Power reflection coefficients dependence is investigated vs. wave length in a trapped-mode and for the case of anomalous transmission. Distinctions in behavior of dependences of reflection coefficients for a plane wave and wave beam with different linear sizes are shown and analyzed. Dependence of the reflected and passed beam shapes in a far zone is shown vs. wave length. The effect of narrowing of the directional pattern of a scattered field, as against that of an incident beam field, is explained.

Key words: three-dimensional Gaussian wave beam,  two-dimensional periodic structures, directional pattern, electrodynamic behavior

Manuscript submitted 25.11.2013

Radio phys. radio astron. 2014, 19(1): 48-56

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