Accession Number:

AD0274820

Title:

HIGH POWER TRANSMISSION LINE AND ASSOCIATED MICROWAVE PARTS

Descriptive Note:

Quarterly progress rept. no. 2, 1 Oct-31 Dec 61

Corporate Author:

MICROWAVE ASSOCIATES INC BURLINGTON MASS

Personal Author(s):

Report Date:

1962-03-20

Pagination or Media Count:

15.0

Abstract:

Design considerations for a 100 ft of S-band transmission line for operation at 45 kw average power and 15 megawatts of peak power are presented. Since high average power is the major consideration, an important item is the environment into which the heat from the waveguide will be dissipated. Finned waveguide, using natural convection and radiation cooling can adequately handle the required average power if the environment is adequate. If the waveguide is placed in a confined region, it is necessary to use a force method of cooling, preferably by liquid. If pressurization is not desired, the tall waveguide in this case L band waveguide turned on end would suffice. However, the problem arises of constructing mode filters to eliminate or absorb the undesired modes which will be excited in this waveguide at S-band frequencies. The analysis on heat dissipation has shown that the finned waveguide using convection and radiation for heat transfer can easily give 3 to 1 improvement in the power dissipation capabilities. Forced liquid cooling, though requiring a coolant, a pump and a heat exchanger can be much more effective. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE