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Experimental results are presented demonstrating the electrical characteristics of a cylindrical antenna loaded with capacitive elements whose reactance increases exponentially with the distance from… (More)
A bifocal dual reflector antenna is similar to and has better scan capability than a classical Cassegrain reflector antenna. The method used in determining the reflector surfaces is a modification of… (More)
Using geometrical optics approximation, an expression is derived for the illumination efficiency of a shaped Cassegrain system when the feed pattern differs from a given pattern used for designing… (More)
Abstract The surfaces obtained by various machining processes deviate from the specified geometry defined in terms of mathematical equations particularly regarding sphericity. An attempt has been… (More)
A theory is developed for the current distribution, impedance, and radiation characteristics of a two-element Yagi-type array, consisting of a driven antenna and a tuned parasite in a parallel-plate… (More)