Acoustic surface wave devices
阅读：534发布：2022-03-13
专利汇可以提供Acoustic surface wave devices专利检索，专利查询，专利分析的服务。并且An acoustic surface wave device relies on its effectiveness not on the piezoelectric effect but on the electrostrictive effect whereby the effectiveness of the device is electric field dependent.，下面是Acoustic surface wave devices专利的具体信息内容。
1. An acoustic surface wave device which relies on its effectiveness on the electrostrictive effect rather than on the piezoelectric effect whereby the effectiveness of the device is electric field dependent, said device comprising a body of material which has electrostrictive constants and piezoelectric constants such that for an acoustic surface wave traveling in a first given direction in said body and an electric field applied to said body in a second given direction the piezoelectric effect is negligible, and means for applying an electric field to the body of material in the second given direction.
2. An acoustic surface wave device as claimed in claim 1 in which the device is a one finger pair transducer.
3. An acoustic surface wave device as claimed in claim 1 in which the device is an interdigital comb transducer.
4. An acoustic surface wave device as claimed in claim 3 in which the means for applying an electric field to the body of material in the second direction includes means for applying variable electric fields to separate portions of the electrodes of said interdigital comb transducer.
5. An acoustic surface wave device as claimed in claim 1 in which the body of material includes a layer of said material on a substrate.
6. An acoustic surface wave device as claimed in claim 5 in which the thickness of said layer is no greater than two wavelengths in the material of an acoustic surface wave, said substrate being made of material which is physically capable of supporting an acoustic surface wave.
7. An acoustic surface wave device as claimed in claim 3 in which the body of material includes a layer of the material on a substrate.
8. An acoustic surface wave device as claimed in claim 7 in which the thickness of said layer is no greater than two wavelengths in the material of an acoustic surface wave, said substrate being made of material which is physically capable of supporting an acoustic surface wave.
9. An acoustic surface wave device as claimed in claim 4 in which the body of material includes a layer of said material on a substrate.
10. An acoustic surface wave device as claimed in claim 9 and in which the thickness of the layer is at most two wavelengths in the material of an acoustic surface wave, said substrate being made of material which is physically capable of supporting an acoustic surface wave.
11. An acoustic surface wave device as claimed in claim 1 and in which which the device is an acoustic surface wave amplifier.
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