Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Array Amplitude Shading: -40dB Sidelobes

Transmitting Array Amplitude Shading      Transmitting Array Amplitude Shading

BII-2080 Series  Array Amplitude Shading: -40dB Sidelobes

BII-2080 series is amplitude shading/weighting unit for use in side-lobe suppression of transmitting or receiving array. These low cost embedded modules support linear and planar arrays to increase the bearing accuracy and reduce ambiguity of the direction-finding sonar system.

A planar array of Cross shape, T shape, star shape... and a volumetric 3D array can be configured using the line array as a building block. The BII-2080 as a building block support these array patterns for sidelobes suppression.

With BII-2080s, costly multi-channel simultaneous sampling ADCs are not needed to suppress receiving sidelobes, and multi-channel DACs are not needed to suppress transmitting sidelobes. Sidelobe suppression at transducer material level also has much high cost and technical difficulties. BII-2080 series provides simple, low cost, real-time and accurate -30/-40 dB sidelobe suppression at analog electronic hardware level.

Transmitting Array Amplitude Shading Click Transmitting Array Amplitude Shading for specs in detail
Receiving Array Amplitude Shading Click Receiving Array Amplitude Shading for specs in detail

Array Amplitude Shading      Array Amplitude Shading

Array Amplitude ShadingArray Amplitude ShadingArray Amplitude Shading

Technical Note

Amplitude shading of a transmitting or receiving array is a method through which the transmitting or receiving voltage (or current) responses of array elements are tuned to provide the most desirable directional pattern for a particular application. The array can be shaded to have a desirable beam width and response at central lobe, and suppressed responses at sidelobes, or vise versa.

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