Highly directive array aperture
US8873340B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2013 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Jul 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method is provided that utilizes sonar array discontinuities for increasing the directivity gain of a sonar system by increasing the ratio of trace wavelengths (replicated) to the length of a fixed array aperture. Impedance discontinuities, or blocking masses, are embedded in a matrix material of fixed length to create Bragg scattered longitudinal displacements of a wavelength. The longitudinal displacements are induced by an incident acoustic plane wave. This creates longitudinal replicas of the displacements, shifted in wave number, creating a scaled acoustic trace wavelength. The replicated trace wavelength is sampled and resolved, thereby increasing the directivity gain of a sonar system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.