Title :
Accuracy of a Temperature-Compensated Precision RF Power Bridge
Author :
Aslan, Edward E.
Abstract :
A temperature-compensated de-substitution-type RF power bridge is described. Temperature compensation is accomplished through utilization of dual bridges and the widely used dualelement temperature-compensated thermistor mount. A review of the RF-to-dc substitution technique is made prior to the description of the bridge. An analysis of the measurement accuracy shows total errors of less than 0.14 percent at 1 mW and less than 0.085 percent at a 10-mW RF power measurement. These errors include those arising out of ambient temperature variation.
Keywords :
Bolometers; Bridge circuits; Electrical resistance measurement; Potentiometers; Power measurement; Radio frequency; Temperature dependence; Thermal resistance; Thermistors; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1969.4313807