CRYOGENIC MICROWAVE CHANNELIZED RECEIVER

The channelized receiver being presented demonstrates the use of high temperature superconductor technology in a microwave system setting wh ere superconductor, microwave-monolithic-intergraed-circuit, and hybri d-integrated-circuit components are united in one package and cooled t o liquid-nitrogen temperatures, The receiver consists of a superconduc ting X-band four-channel demultiplexer with 100-MHz-wide channels, fou r commercial monolithically integrated mixers, and four custom-designe d hybrid-circuit. detectors containing heterostructure ramp diodes, Th e composite receiver unit has been integrated into the payload of the second-phase NRL high temperature superconductor space experiment (HTS SE-II). Prior to payload assembly, the response characteristics of the receiver were measured as functions of frequency, temperature, and dr ive levels. The article describes the circuitry, discusses the kev iss ues related to design and implementation, and summarizes the experimen tal result.