发明名称 |
Tapped surface acoustic wave delay line |
摘要 |
A tapped surface acoustic wave (SAW) delay line with time-resolved outputs using piezoelectric leaky wave coupling and bulk wave amplification, and having low loss characteristics. A solid piezoelectric semiconductor is placed adjacent to a solid piezoelectric substrate. A pulsed rf input signal is applied to interdigital transducers (IDT) on the substrate. The applied signal launches a SAW in the substrate in a direction parallel to the interface between the substrate and the piezoelectric semiconductor solid. Upon reaching the interface, the SAW is piezoelectrically leaky-wave coupled across an air gap to a bulk acoustic wave in the piezoelectric semiconductor. Reflections of the bulk wave occur at both surfaces of the piezoelectric semiconductor, and piezoelectrically couples back across the air gap to excite a SAW on the piezoelectric substrate. The resultant rf output includes the normal delayed SAW pulse and additional delayed and time-resolved pulses. The amplitude of the bulk wave may be increased using bulk wave amplification.
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申请公布号 |
US4088969(A) |
申请公布日期 |
1978.05.09 |
申请号 |
US19770788874 |
申请日期 |
1977.04.19 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY |
发明人 |
CROWLEY, JAMES D.;WELLER, JOSEPH F.;GIALLORENZI, THOMAS G. |
分类号 |
G10K11/36;H03F13/00;H03H9/42;(IPC1-7):H03H9/30;H03F3/04;H01L45/02;H03F3/55 |
主分类号 |
G10K11/36 |
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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