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OwnerJames C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher, David L. Trowbridgeinventors
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An X-band traveling wave maser of the folded-comb type is provided with two figure-eight coils for gain and bandwidth control. One figure-eight coil covers the full length of the comb structure for bandwidth adjustment of an external magnetic field. The other figure-eight coil covers a central half of the comb structure for independent gain adjustment of the external magnetic field. The half of each figure-eight coil at the turn around end of the comb structure is oriented to aid the external magnetic field, and the half of each figure-eight coil at the input-output end of the comb structure is oriented to buck the external magnetic field. The maser is pumped in the push-push mode with two different frequencies.
In a traveling wave solid-state maser having a folded-comb structure with an input-output end and a turn-around end, said maser being designed for operation in a push-push pump mode using separate pump frequencies, and said maser having an external magnetic field that is uniform across the full length of the folded comb structure, the combination comprising:
In combination with a traveling wave maser of the folded comb type having an input-output end and a turn-around end, and having an external magnetic field that is uniform across the full length of the folded comb structure, a set of two magnetic field shaping figure-eight coils, one a bandwidth-control figure-eight coil covering the full length of the comb structure with the direction of current and coil windings at the turn-around end of the folded-comb structure selected to aid the external field and the direction of current and coil windings at the input-output end of the folded comb structure selected to buck the external field, and the other a gain control figure-eight coil covering the central half of the comb structure with the direction of current and coil windings at the turn-around end of the folded comb stucture selected to aid the external field and the direction of current and coil windings for said current at the input-output end of the folded comb structure selected to buck the external field, and separate adjustable current sources for providing said currents to said set of figure-eight coils, one current source for each figure-eight coil.
Dependencies are inferred from the claim text.