Accession Number:

AD0621094

Title:

A COAXIAL CALORIMETER FOR USE AS A MICROWAVE POWER STANDARD,

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) RADIO AND ELECTRICAL ENGINEERING DIV

Personal Author(s):

Report Date:

1964-09-28

Pagination or Media Count:

6.0

Abstract:

A coaxial calorimeter has been built for use in the comparison of power at high frequencies with dc resistance and voltage standards. The temperature rise of the metal jacket of a 50-ohm coaxial termination is measured with a thermopile when a known level of dc power is fed into the calorimeter. The high-frequency sensitivity of the calorimeter is obtained by modifying the dc sensitivity for 1 Input VSWR of the calorimeter, 2 Attenuation of a 6-inch length of thermally insulating input coaxial line, 3 The effect of current distribution in the load. The accuracy is estimated at better than 1 per cent below 4 Gcs with the largest errors due to the input VSWR of the calorimeter. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE