Accession Number:

AD0749799

Title:

Microwave Coupled-Stripline Surface-Crack Detector.

Descriptive Note:

Final rept. Sep 71-Jul 72,

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s):

Report Date:

1972-08-01

Pagination or Media Count:

44.0

Abstract:

A microwave coupled-stripline surface-crack detector was designed and built using the capability of a pair of conductors over ground to support propagation in two orthogonal TEM modes. For this crack-detector application, the two conductors are flat strips printed on a dielectric sheet. The other side of the dielectric sheet is clad with metal at RF ground potential. The printed stripline assembly is used to scan a surface to be examined for cracks, which is also at RF ground potential. When the stripline approaches a surface crack, the crack couples energy from one mode into the other because the symmetry of the geometry is upset. Design information was generated using a sophisticated computer program that calculates a quantity proportional to the crack-produced coupling of power from one mode to the other. Author

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE