Invention Grant
US08305163B2 Tunable filter including a surface acoustic wave resonator and a variable capacitor
有权
可调谐滤波器，包括表面声波谐振器和可变电容器
- Patent Title: Tunable filter including a surface acoustic wave resonator and a variable capacitor
- Patent Title (中): 可调谐滤波器，包括表面声波谐振器和可变电容器
-
Application No.: US13096026Application Date: 2011-04-28
-
Publication No.: US08305163B2Publication Date: 2012-11-06
- Inventor: Michio Kadota
- Applicant: Michio Kadota
- Applicant Address: JP Kyoto
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2008-294694 20081118
- Main IPC: H03H9/64
- IPC: H03H9/64
Abstract:
A tunable filter includes a surface acoustic wave resonator, in which an IDT electrode is defined by an electrode material provided in a recess in an upper surface of a piezoelectric substrate made of LiNbO3 or LiTaO3, and a ZnO film is arranged to cover the upper surface of the piezoelectric substrate, and variable capacitors connected with the surface acoustic wave resonator.
Public/Granted literature
- US20110199169A1 TUNABLE FILTER Public/Granted day:2011-08-18
Information query
