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This paper describes the design approach, fabrication techniques, and electrical performance for two types of microwave hybrid thin-film phase shifters. Emphasisis placed on the practical aspects of the overall design and fabrication. A simplified set of design equations for loaded-line phase-shift networks is presented and divided into three categories based on the type of loading employed. The two circuits presented are a 4-bit 90 /spl deg/ network employing single-section multibits to minimize physical size, and a 4-bit 360 /spl deg/ network employing the 45 /spl deg/ section as a basic building block.
Date of Publication: June 1968