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Interlaboratory Comparison of Power Measurements at Millimetre- and Sub-Millimetre-Wave Frequencies.
- Source :
- Metrology; Jun2024, Vol. 4 Issue 2, p279-294, 16p
- Publication Year :
- 2024
-
Abstract
- The aim of this paper is to compare the power measurement capabilities in millimetre- and sub-millimetre-wave frequency bands of several national metrology institutes and one research institute. The first comparison, in WR-6.5 waveguide (110 GHz to 170 GHz), involved NPL, TUBITAK UME and PTB. The second comparison, in WR-1.5 waveguide (500 GHz to 750 GHz), involved NPL, METAS, TUBITAK UME, LNE, WAT, GUM and VDI. Two types of travelling standards were used for these comparisons: a thermoelectric power sensor in the WR-6.5 band and a calorimetric power sensor in the WR-6.5 and WR-1.5 bands. The thermoelectric power sensor was characterised by the participants against their own standards and a generalised effective efficiency was calculated. The calorimetric power sensor operating in the WR-6.5 band was measured to observe its behaviour during the comparison and was also measured in the WR-1.5 band after being fitted with a suitable waveguide taper and used in conjunction with a frequency multiplier. The participants measured the output of the calorimetric power sensor and their own power sensor standard. A normalised power ratio method was used as a comparison parameter for the WR-1.5 band measurements. In addition, a pyroelectric power standard was used by METAS to measure absolute power, and a frequency of 650 GHz was used as a link between the absolute power and the power ratios. Finally, all but two of the measurement points compared between the participants achieved agreement in terms of E n scores less than 1. For the first time, an interlaboratory comparison of power measurements at sub-millimetre frequencies has been performed and, overall, good agreement was achieved between the different laboratories. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 26738244
- Volume :
- 4
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Metrology
- Publication Type :
- Academic Journal
- Accession number :
- 178183769
- Full Text :
- https://doi.org/10.3390/metrology4020017