Method for the elimination of spurious echos in electro-acoustic delay lines using bulk waves and delay line applying this method
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United States of America Patent
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Apr 11, 1989
Grant Date -
N/A
app pub date -
Jan 14, 1988
filing date -
Mar 25, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods are disclosed for the elimination of spurious echos in electro-acoustic delay lines using bulk waves. The method consists in etching an array, formed of hollows and peaks on a reflecting side of a delay line of this type, the difference in height between the said hollows and peaks giving the waves reflected from them a phase difference such that the signals induced by the spurious echos in the transducer cancel one another out. The method can be used to improve the characteristics of a delay line using bulk waves without excessively complicating its manufacture.
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