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 |
CA2135983(C) |
申请公布日期 |
1998.02.10 |
申请号 |
CA19942135983 |
申请日期 |
1994.11.16 |
申请人 |
NORTHERN TELECOM LIMITED |
发明人 |
TILLER, SAMUEL ALFRED;SAW, JOHN CHOO BENG;SUTHERS, MARK SPENCER;NISBET, JOHN JACKSON;CAMERON, THOMAS PHILIP |
分类号 |
H03H9/145;H03H9/00;H03H9/25;H03H9/64;(IPC1-7):H03H9/17 |
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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