BROAD BAND INTERFERENCE SONAR HAVING COMPRESSED EMISSION
Assignee
THOMSON-CSF
Filed
Oct 29, 1985
Granted
Dec 27, 1988
Location
LE CONQUET FR
Abstract
A system of emission array with several pairs of emitting transducers to emit simultaneously and covering contiguous frequency sub-bands of a band B. The sub-bands have a width which is less than or at most equal to the width inducing an acceptable displacement of the directivity lobes of the emission pattern of a pair of arrays. The emitters of a single pair are spaced by a distance of Li and emit signal pulses at frequency fi and of duration τe 1/Δf, the products Li fi being equal for all the pairs of emitters. The emission patterns of the various pairs of emitters accordingly coincide precisely, and, as the emitters are supplied with signals emerging from the oscillators which are in phase at the center of the pulse of duration τe, the pulse resulting from the superposition of the emitted signals is compressed in time.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
May 1, 1987
Rescinded
Aug 24, 1987
Duration
3 months
Inventor
- 1GEORGES GRALL
Record Details
- Patent number
- US 4794574
- Application
- 06808652
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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