Radiation from a Circular Bend between Two Discontinuities in Open Wave Guiding Structures.
Abstract
Surface waveguides radiate energy at bends. The asymptotic problem of solving for the radiated power and the radiation pattern for large radius of bend have been studied theoretically for the slab waveguide and for the circular cylindrical waveguide. The slab configuration consists of two semi-infinite slabs joined by a circular bend. The cylindrical configuration consists of two straight circular cylinders joined by a circular bend. The results indicate that the discontinuities at the transitions between the straight sections and the bend cause the radiation to differ significantly from the radiation of a bend of the same size but being part of a uniform circular structure rather than being joined to two straight sections. The radiated power for both the slab and circular cylinder configurations is found to vary inversely as the square of the radius of curvature, and the radiation pattern is composed of many closely spaced narrow lobes. As the radius of curvature of the bend increases the lobes become more numerous and more closely spaced. The results can be extended for use to calculate approximate power loss due to radiation from bends in open waveguides in close proximity to the earth. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1977
- Accession Number
- ADA047525
Entities
People
- S. W. Maley
Organizations
- University of Colorado Boulder