发明名称 |
Double mode surface wave resonators |
摘要 |
A double mode surface wave resonator comprises two IDTs (inter-digital transducers), arranged side by side between reflection gratings, on a surface of a piezoelectric substrate to provide for coupling of surface waves therebetween, each IDT having interleaved electrodes extending from a common rail between the two IDTs and from a respective outer rail of the IDT. One or each of the IDTs and its outer rail is divided into two halves for providing a differential signal connection to the resonator. The electrodes of the IDTs can be arranged in spatial synchronism with adjacent fingers of the reflection gratings to reduce spurious longitudinal modes.
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申请公布号 |
US5365138(A) |
申请公布日期 |
1994.11.15 |
申请号 |
US19930160628 |
申请日期 |
1993.12.02 |
申请人 |
NORTHERN TELECOM LIMITED |
发明人 |
SAW, JOHN C. B.;CAMERON, THOMAS P.;SUTHERS, MARK S.;NISBET, JOHN J.;TILLER, SAMUEL A. |
分类号 |
H03H9/145;H03H9/00;H03H9/25;H03H9/64;(IPC1-7):H01L41/08 |
主分类号 |
H03H9/145 |
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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