Evaluation of Hewlett Packard RF Thermistor Mounts for Power Linearity

摘要

A method has been developed for evaluating the power sensitivity linearity of Model 478A, 478A-H75, and 8478A, thermistor mounts manufactured by Hewlet Packard Company Inc., Palo Alto. This method provides the thermistor mount power sensitivity curve as measured power approaches the maximum rated power of the thermistor mount. This characteristic is essential to the accuracy of power ratio measurements. Selection of thermistor mounts, linear within 0.001 dB over a 15 dB range, is possible. This is a ten-fold improvement over the previous 0.01 dB value used. This improvement was required for the enhanced certification of 10 dB attenuators needed in the calibration support of attenuation measurement, power calibration, and network analyzer systems. (ERA citation 13:030897)