Research the Method of Evaluation Microwave Power Standard Correction Factor Uncertainty Based on the Theory of Electromagnetic Field

Abstract:

Microwave power standard adopts calorimetry techniques to calibrate the effective efficiency of the thermistor mount. Correction factor is the key of calibration thermistor mount.The microwave power standard mainly adopted short-circuited mode to determine the correction factor so far, but it must consider the effects of microwave power absorbed by short plate to thermopile, so the method that how to get the power dissipated in the short plate is the key to calculating correction factor and its uncertainty. This paper presents a new method based on electromagnetic field theory to consider the short-circuit dissipation power. A detailed analysis of its superiority over the traditional method is shown. It reduces the uncertainty of the correction factor reasonably, in other words, reduces the uncertainty of the microwave power standard.

• Periodical: Applied Mechanics and Materials (Volumes 333-335)
• Pages: 284-289
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.333-335.284
• Online since: July 2013
• Authors: Wei Jie Sun, Xiao Hai Cui, Yong Li
• Keywords: Correction Factor, Electromagnetic Field (EMF), Microwave Power Standard, Uncertainty

References

[1] T.P. Crowley, Xiaohai Cui, Design and Evaluation of a WR-15 (50 to 75 GHz) Microcalorimeter., CPEM 2008 Conference, June (2008).

DOI: 10.1109/cpem.2008.4574832

[2] J. W. Allen, F. R. Clague, N. T. Larsen, and M. P. Weidman, NIST microwave power standards in waveguide, NIST Technical Note 1511, Feb. (1999).

DOI: 10.6028/nist.tn.1511

[3] Beatty, R.W. Application of waveguide and circuit theory to the development of accurate microwave meaurementa and standards. Nat. Bur. Stand. (U.S. ) Monograph 137; 1973 August.

[4] Runqing Run, Yinghui Li, The foundation of Microwave technology, Beijing Institute of Technology Press, (2008).