Accession Number:

AD0272110

Title:

ABSORPTION AND TRANSMISSION OF ELECTROMAGNETIC WAVES. PHASE J. INVESTIGATION OF INTERDEPENDENCE OF ABSORBER DESIGN PARAMETERS

Descriptive Note:

Corporate Author:

GOETTINGEN UNIV (WEST GERMANY)

Personal Author(s):

• HELBERG,H.W.

Report Date:

1961-09-30

Pagination or Media Count:

1.0

Abstract:

IT IS SHOWN, THAT A THIN, HOMOGENEOUS, DISSIPATIVE LAYER IN FRONT OF A METAL PLATE ABSORBS ELECTROMAGNETIC WAVES OVER A WIDE RANGE OF FREQUENCIES reflection coefficient R equal to or less than 10. The frequency range is extended towards higher frequencies by arranging the dissipative layer a small distance from the metal plate. The frequency interval with optimal matching R equal to or less than 10 calculated from measured values of relative dielectric constant and relative permeability of the ferrite Ferramic E is 110 without and 120 with air layer between metal plate and dissipative layer. Measurements with a similar ferrite, Ferramic E 1960, in principle confirm the predetermined results. Author

Descriptors:

• *ABSORPTION
• *ELECTROMAGNETIC RADIATION
• *WAVE PROPAGATION
• ANTIRADAR COATINGS
• DIELECTRIC PROPERTIES
• FERRITES
• MATERIALS
• MATHEMATICAL ANALYSIS
• METAL PLATES
• MICROWAVES

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE