Scheduled System Maintenance:
On May 6th, single article purchases and IEEE account management will be unavailable from 8:00 AM - 5:00 PM ET (12:00 - 21:00 UTC). We apologize for the inconvenience.
By Topic

System for Transfer of Calibration Factor for Coaxial Bolometer Mounts with One Percent Transfer Inaccuracy

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)

A system of coaxial RF power transfer standards (directional couplers with thermistor mounts on their side arms) and associated instrumentation has been developed for accurate transfer of calibration factors from primary standards laboratories to working power meters. The frequency range is 0.1 to 12.4 GHz and calibration can be transferred to terminating or feedthrough power meters. The system includes six RF power sources, five coaxial RF power transfer standards, a dc substitution power standard, and feedback circuits (including chopper and amplifier). The sources are stabilized by dc substitution feedback so that the RF power is either ¿, 1, 5, or 10 milliwatts. Since no corrections are made for the impedances of the source and load, the maximum possible error in transferring a calibration depends upon the VSWR of the bolometer mount or feedthrough power meter to which the calibration is transferred. This error approaches 1 percent as the VSWR approaches 1.5. Calibrations can be transferred at fixed frequencies or using swept frequency methods. High precision swept frequency techniques for measuring insertion loss and input and equivalent output VSWR were developed in connection with this system. These are described and the results of system performance measurements are given.

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:15 ,  Issue: 4 )