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The design and correction factor evaluation of a WR-15 (50 to 75 GHz) rectangular waveguide microcalorimeter is presented. This new microcalorimeter will be the US national standard for power from 50 to 75 GHz. It can measure the effective efficiency of a wider variety of transfer standards than can the previous microcalorimeter. It has also been designed so that its correction factor can be experimentally...
INRiM coaxial microcalorimeter underwent to several modifications concerning both hardware and software in the last decade. Several models have been meanwhile proposed, each one considering different calibration processes and error sources. Hereby we compare these models for the 3.5 mm configuration from 10 MHz to 26.5 GHz.
A novel, self-consistent approach for the determination of the correction factor of a waveguide microcalorimeter is described. The method is based on the measurement of offset shorts of different length followed by one single calibration measurement of an unknown thermistor DUT. Without precisely measuring the RF power incident to the reference plane, both calibration factor of the DUT as well as...
The performance of a quantum based microwave power standard is presented. The measured incident power is compared to a known value. In order to improve the comparison we have developed, a waveguide micro calorimeter. We have also rebuilt part of the instrument. Results from both systems will be presented.
This paper describes the status of RF power standards at KRISS briefly and introduces the on going project which developing a 3.5 mm coaxial microcalorimeter for implementing the national power standard up to 26.5 GHz. Microcalorimeter design and developing process which based on CAD and computer aided engineering (CAE) will be discussed and some results will be shown.
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