EDN

A New Coaxial Flow Calorimeter for Accurate RF Power Measurements up to 100 Watts and 1GHz

This method has been refined over the years, and NIST reports that they can now calibrate transfer standards with an uncertainty of 0.67% [3][8] for 100 W measurements below 1 GHz. This uncertainty ...
Nature

Prediction of energy expenditure in a whole body indirect calorimeter at both low and high levels of physical activity

OBJECTIVES: In studies that involve the use of a room calorimeter, 24 h energy intake is often larger than 24 h energy expenditure (24 h EE) because of a decrease in activity energy expenditure due to ...
Nature

Tracmor system for measuring walking energy expenditure

Objective: Walking is an important mode of exercise and is likely to represent a major component of nonexercise activity thermogenesis. The question arises, how best to quantify walking-energy ...
EDN

A New Coaxial Flow Calorimeter for Accurate RF Power Measurements up to 100 Watts and 1 GHz

Historically, there have been two methods for establishing the traceability of RF power measurements at power levels higher than a few watts. One method is to use low-power sensors traceable through ...