Underwater Surface Wave Propagation, and Associated Radiation.
Abstract
An interesting application of surface waves is in the field of underwater acoustic wave launchers and receivers. Present day acoustic antennas depend upon (excepting linear arrays) their cross sectional dimension to control the beam pattern. To obtain a narrow pattern a large cross section (in terms of wavelength) is necessary. In a surface wave antenna the length of the radiator rather than the cross section is of primary importance in the production of a large directivity index. But before any worthwhile radiator can be designed, information concerning the transmission of surface wave energy between media must be available. This paper deals with this question of surface wave transmission specializing in the field of launching underwater acoustic energy. Included will be a discussion of the mathematics of surface waves associated with boundaries between a solid and a vacuum, and a solid and a liquid. A description is given of the experimental setup and the resulting beam patterns obtained from surface waves launched from metallic rectangular bars will be shown.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 16, 1963
- Accession Number
- ADA052227
Entities
People
- F. H. Middleton
- M. P. Feder
Organizations
- University of Rhode Island