Celep, M (2021) Advanced Microwave Power Metrology. In: International Conference on Nuclear Technology Radiation Safety and Advanced Technological Researches (ICNRA 2021), 10-11 December 2021, Istanbul, Turkey.

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Abstract

Metrology is defined as “The science of measurement and its application” in the “International Vocabulary of Metrology”. Metrology aims to provide accurate, repeatable and reliable measurements for trade, safety, health, environment, etc. and confidence in measurement results and data traceable to the International System of units (SI) units. Microwave metrology also aims to obtain an accurate microwave power quantity with reliable uncertainty traceable to SI units through DC resistance and voltage. Microwave power traceability is provided through micro-calorimeter measurement systems. The power traceability is obtained with two different methods while one of them is to directly characterize the microwave power using calorimetric measurement technique, the other one relies on characterization of a power sensor as a transfer standard.

Microwave power is widely measured up to 110 GHz. New technological opportunities such as 5G, internet of things, etc. are asking traceable power for higher frequencies. But, measurement for higher frequencies than 110 GHz is a challenge in terms of measurement standards and traceability. To obtain traceable microwave power from 110 GHz to 170 GHz two methods have been studied at the National Physical Laboratory (NPL). A new calorimeter measurement technique was proposed and power was directly measured using this technique with a custom designed microwave termination. The other method was for characterization of a power sensor to measure microwave power using a microcalorimeter technique. A new microcalorimeter for D-band (110 GHz – 170 GHz) was established, characterized and an effective efficiency of the power sensor was measured . In addition, the new design of D-band power sensor by the University of Birmingham was characterized.

As a conclusion, the new calorimeter measurement system was proposed and used to traceably measure microwave power from 110 GHz to 170 GHz. The new microcalorimeter system has been established and characterized for D-band. The new microcalorimeter was used to characterize the power transfer standards and results were compared with other NMIs. The results obtained were in good agreement.

Item Type:	Conference or Workshop Item (Paper)
Keywords:	Microwave, power, D-band
Subjects:	Electromagnetics > RF and Microwave
Divisions:	Electromagnetic & Electrochemical Technologies
Last Modified:	15 Feb 2023 14:14
URI:	https://eprintspublications.npl.co.uk/id/eprint/9650