Abstract
Experimental ferrite phase shifters that utilize superconductor circuits with very low conduction losses are described. Magnetic flux is confined to a closed path, thereby avoiding deterioration of the superconducting properties that occurs when magnetic fields enter the superconductor. X-band differential phase shifters with meanderline circuits fabricated from niobium superconductors operated at 4 K have produced figures of merit exceeding 1000 deg/dB. The designs are adaptable to high-T/sub c/ superconductors.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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