Thermal equivalence error of microwave power measurement

摘要

It is proved that effective efficiency of a thermistor mount changes with its heat transfer condition. A system error is found after a comparison between heat transfer procedure in a microcalorimeter and the one during a power measurement procedure. The error is named thermal equivalent error in this paper. It is analyzed in details and its analytic expression is derived. As a conclusion, a method is suggested to avoid this error at last.