A Polylithic Filter Channel Bank

The advent of AT-cut quartz crystal resonator filters has made possible the design of high-quality channel translation equipment with reduced cost and size. This paper describes a new channel bank, with built-in carrier generation, employing 8-MHz polylithic crystal filters for sideband selection and singleresonator filters for carrier selection. Integrated and hybrid thick film circuits have been used to provide increased reliability and size reduction The modulation plan, equipment design, and performance are discussed.