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WESTINGHOUSE WINS CONTRACT TO DEVELOP SUPERCONDUCTING MICROWAVE CIRCUITS

 WESTINGHOUSE WINS CONTRACT
 TO DEVELOP SUPERCONDUCTING MICROWAVE CIRCUITS
 PITTSBURGH, Dec. 19 /PRNewswire/ -- Westinghouse Electric Corporation (NYSE: WX) has been awarded a contract valued at $5.4 million by the U.S. Office of Naval Research, under funding provided by the Defense Advanced Research Projects Agency, to construct integrated circuit elements for microwave radio receivers using high- temperature superconductor materials, it was announced today.
 The company's Science & Technology Center here, assisted by its Electronic Systems Group in Baltimore, EMCORE, Inc., and Northwestern University, will carry out the three-year program with the goal of demonstrating the practical usefulness of high-temperature superconductor materials in microwave systems.
 The program team will use the materials to make identical pairs of electronic circuit elements called channelizer filter banks and delay lines. These superconducting circuit elements will make it possible to build microwave receivers of unprecedented frequency selectivity and sensitivity to faint signals important for electronic warfare applications.
 In addition to electronic warfare receivers, the devices would have many other defense and commercial uses such as space-based communications and advanced radar systems.
 "A high-temperature superconducting material was chosen for these circuits because it alone can hold electrical losses low enough to allow detection and processing of faint signals, while at the same time providing very narrow band selectivity, in a small and affordable package," said Dr. George R. Wagner, program manager at the Westinghouse Science & Technology Center.
 To carry out their task of direction finding by comparing the amplitude and phase of incoming signals, the integrated circuit elements must be virtually identical. This requires that they be fabricated to exacting tolerances by photolithography on thin films with very smooth surfaces, and that the surface area be four times larger than any yet made with the material.
 "We intend to develop uniform and highly reproducible four-inch-diameter films to provide the surface area required for acceptable yields of the matched circuit elements that the program requires," Wagner said. "Most labs that make high-temperature superconductor films do so on small substrates, and only we and a few others so far have reported film diameters as large as two inches.
 "It's an ambitious program," he said. "Once we overcome the process constraints that make it difficult to grow the required films, the engineering challenge will be to process them and develop the microwave circuits in suitable packages for the cryogenic environment."
 Westinghouse has been a world leader in the development and application of superconductor technology for more than 40 years.
 -0- 12/19/91
 /CONTACT: Robert J. Benke of Westinghouse Electric Corporation, 412-642-3321/
 (WX) CO: Westinghouse Electric Corporation ST: Pennsylvania IN: CPR SU: CON


CD -- PG001 -- 3880 12/19/91 12:01 EST
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Date:Dec 19, 1991
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