Microwave Coupled-Stripline Surface-Crack Detector.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1972
- Accession Number
- AD0749799
Entities
People
- Lloyd A. Roberson
- Ulrich H. Gysel
Organizations
- SRI International