Title:
【発明の名称】表面波共振器
Document Type and Number:
Japanese Patent JP3060070
Kind Code:
B2
Abstract:
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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Inventors:
So John Chu Ben
Cameron Thomas Philip
Suthers Mark Spencer
Nisbet John Jackson
Tiller Samuel Alfred
Cameron Thomas Philip
Suthers Mark Spencer
Nisbet John Jackson
Tiller Samuel Alfred
Application Number:
JP51530595A
Publication Date:
July 04, 2000
Filing Date:
June 22, 1994
Export Citation:
Assignee:
Nortel Networks Corporation
International Classes:
H03H9/145; H03H9/00; H03H9/25; H03H9/64; (IPC1-7): H03H9/145; H03H9/25; H03H9/64
Domestic Patent References:
| JP62188512A |
Attorney, Agent or Firm:
Kazuto Izumi