Parabolic dish of diameter 80 cm and focal length is illuminated at 4 GHz. Circular source at 40000 km is animated. Dish focus placed at origin. 5 pw incident on dish. Circular dish surface currents are animated. Source is animated. Circularly polarized electromagnetic field at focus is animated. Source is translated 20000 km along y axis for oblique incidence. Dish currents at oblique incidence are animated.
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