Title:
SAW DEVICE AND APPARATUS EMPLOYING IT
Document Type and Number:
WIPO Patent Application WO/2005/125005
Kind Code:
A1
Abstract:
A SAW device removing the defects of prior art that a filter satisfying the standards required for the RF SAW filter of a GPS receiver could not be realized and that the performance of a circuit or an apparatus degrades when a SAW filter not satisfying the required standards is used in an RF circuit or a communication unit. The SAW device comprises at least one IDT electrode formed along the propagating direction of a surface wave on the major surface of a lithium tantalite (LiTaO3) substrate of Eulerian angles (0°±4°, 144.1°-160.0°, 0°±4°), and grating reflectors arranged on the opposite sides of the IDT electrode, wherein the IDT electrode and the grating reflectors are formed of alminium or aluminium alloy and its standardized electrode film thickness H/&lgr (H is the electrode film thickness,&lgr is wavelength) is set in the range of 0.10-0.14.
Inventors:
ONOZAWA YASUHIDE (JP)
Application Number:
PCT/JP2005/011300
Publication Date:
December 29, 2005
Filing Date:
June 20, 2005
Export Citation:
Assignee:
TOYO COMMUNICATION EQUIP (JP)
ONOZAWA YASUHIDE (JP)
ONOZAWA YASUHIDE (JP)
International Classes:
H03H3/08; H03H9/02; H03H9/145; H03H9/25; (IPC1-7): H03H9/145; H03H3/08; H03H9/25
Foreign References:
| JPH0715274A | 1995-01-17 | |||
| JP2000315936A | 2000-11-14 | |||
| JPH1192147A | 1999-04-06 | |||
| JP2004035396A | 2004-02-05 | |||
| JP2003087096A | 2003-03-20 |
Attorney, Agent or Firm:
Suzuki, Hitoshi (2nd Floor 6-5, Arai 2-chome, Nakano-ku Tokyo, JP)
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