发明名称 |
TRANSDUCERS WITH IMPROVED IMPEDANCE MATCHING |
摘要 |
A transducer (140) having a mechanical impedance over an operative frequency range and having a desired power coupling (145) to a load over the operative frequency range comprises a piezoelectric device (141) having a frequency distribution of modes in the operative frequency range; and an overmould (143). The overmould (143) is arranged to surround at least part of the piezoelectric device (141); and the parameters of the overmould (143) are selected to provide a required impedance matching between the mechanical impedance of the transducer (140) and the mechanical impedance of the load. An alternative transducer comprises a mounting means for holding a discrete portion of at least a part of the periphery of the piezoelectric device wherein the parameters of the mounting means are selected to provide a required boundary condition for the periphery of the piezoelectric device whereby the desired power coupling between the transducer and the load is provided. |
申请公布号 |
EP2841213(B1) |
申请公布日期 |
2017.02.01 |
申请号 |
EP20130723904 |
申请日期 |
2013.04.23 |
申请人 |
Hiwave Technologies (UK) Limited |
发明人 |
EAST, James;HARRIS, Neil John |
分类号 |
B06B1/06;G10K11/00;G10K11/02;H01L41/053;H01L41/09;H04R17/00 |
主分类号 |
B06B1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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