发明名称 |
One-twelfth wavelength impedence matching transformer |
摘要 |
An ultrasound transducer including a one-twelfth wavelength impedance matching transformer and methods of manufacturing and using the same. The transducer comprises a transducer element for transmitting and receiving ultrasound waves, a first impedance matching layer, and a second impedance matching layer. The transducer element has a transmitting/receiving surface, an impedance, and a thickness of substantially one-half wavelength of an ultrasound wave generated thereby. The first impedance matching layer is formed on the transmitting/receiving surface of the transducer element and has a thickness of substantially one-twelfth wavelength of the ultrasound wave travelling therein. The second impedance matching layer is formed on a selected surface of the first impedance matching layer and has a thickness of substantially one-twelfth wavelength of the ultrasound passing therethrough. An impedance of the first impedance matching layer is substantially equal to an impedance of an operating medium; whereas, an impedance of the second impedance matching layer is substantially equal to the impedance of the transducer element.
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申请公布号 |
US6371915(B1) |
申请公布日期 |
2002.04.16 |
申请号 |
US19990432914 |
申请日期 |
1999.11.02 |
申请人 |
SCIMED LIFE SYSTEMS, INC. |
发明人 |
KOGER JAMES D.;CROWLEY ROBERT W. |
分类号 |
G10K11/02;(IPC1-7):A61B8/00 |
主分类号 |
G10K11/02 |
代理机构 |
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地址 |
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