A new microcalorimeter for measurements in 3.5 mm coaxial line

A new microcalorimeter has been designed and realized for implementing the national power standard up to the frequency of 26.5 GHz at IEN Galileo Ferraris. It is a dry microcalorimeter, incorporating some new refinements that improve the global performances of the measurement system. This microcalorimeter has been originally designed for calibrating classic thermistor mounts fitted with PC 3.5-mm connector, but will be optimized for thermocouple power sensors, which can operate from direct current to 26.5 GHz.