A new microcalorimeter for measurements in 3.5-mm coaxial line

Author

Brunetti, Luciano ; Vremera, Emil T.

Author_Institution

Inst. Elettrotecnico Nazionale Galileo Ferraris, Turin, Italy

Volume

52

Issue

2

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

320

Lastpage

323

Abstract

A new microcalorimeter has been realized for implementing the national power standard up to 26.5 GHz in a 3.5-mm coaxial line at the Istituto Elettrotecnico Nazionale (IEN) Galileo Ferraris, Turin, Italy. The system is based on a dry thermostatic cell controlled by Peltier elements. The thermal load consists of a twin sensor system that is alternately supplied with high frequency test power and low frequency or direct current (DC) reference power through adiabatic coaxial lines. This microcalorimeter was originally designed for calibrating bolometric mounts. Recently, it has been modified for thermocouple power sensors, which can operate from DC to 26.5 GHz in a 3.5-mm coaxial line.

Keywords

Peltier effect; calibration; calorimeters; coaxial cables; electric sensing devices; error analysis; measurement errors; measurement standards; measurement uncertainty; microwave measurement; power measurement; thermocouples; 26.5 GHz; 3.5 mm; DC reference power; Peltier elements; adiabatic coaxial lines; bolometric mount calibration; coaxial line; direct current reference power; dry thermostatic cell; high frequency test power; low frequency reference power; microcalorimeter; national power standard; thermal load; thermocouple power sensors; twin sensor system; Aluminum; Calibration; Coaxial components; Connectors; Frequency; Hafnium; Insulation; Temperature sensors; Thermal loading; Thermal sensors;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2003.810047

Filename

1202038