Microcalorimeter for 7 mm Coaxial Transmission Line

摘要

Design, evaluation, and construction details are given for the coaxialmicrocalorimeter used by NIST as part of the microwave power standard in 7 mm coaxial transmission line. Two versions are described: one with Type N connector and one with an APC-7 connector. The operating frequency range is 0.01 to 18 GHz with either connector. The microcalorimeter is used to measure the effective efficiency of a reference standard, which is then used to calibrate other microwave power sensors. These reference standards are thermistor mounts designed by NIST to be compatible with the microcalorimeter. Detailed microcalorimeter drawings and assembly instructions are included.