Showing papers on "Active antenna published in 1968"

Very low frequency subminiature active antenna

Abstract: A subminiature active antenna includes two non-magnetic conductive plane elements in spaced parallel relationship separated by a distance of the order of the principal dimension of the plane elements. A conductive member connected to a first plane element, extends at right angles through the second plane element, and is connected to a capacitance multiplier circuit grounded to the second plane member. The capacitance multiplier circuit has an input impedance of phase and amplitude substantially matching the conjugate aggregate impedance presented to it by the antenna members which are thus caused to appear to a received wave field as a much larger capacitance and consequently develop a greater useful signal.