Elastic surface wave filter
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United States of America Patent
Stats
-
Mar 17, 1981
Grant Date -
N/A
app pub date -
Jun 6, 1979
filing date -
Jun 6, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An elastic surface wave filter including on the surface of a plate, an emitting transducer, a surface wave coupler, and means for receiving the waves radiated by the coupler. The means for receiving includes two transducers each having two terminals with one terminal of each being in common with one terminal of the other. The common terminal serves as a phase reference and the voltages induced at the remaining terminals are in phase opposition to one another in the transmission band of the filter.
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