Study on Effective Efficiency Measurement of a Type N Thermistor Mount at 10MHz

When calibrating the Type N power sensor, HP 8478B thermistor mount, with the broadband (0.01~18GHz) coaxial primary power standard, the effective efficiency at the 10MHz was investigated, and we found that the Agilent 34420A nanovoltmeter could not measure floating signal. To weaken the effect of 34420A on the effective efficiency measurement, we modified the power meter.