The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2018
Filed:
Jan. 29, 2016
Applicant:
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Inventor:
Hajime Kando, Nagaokakyo, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/54 (2006.01); H03H 9/64 (2006.01); H03H 9/25 (2006.01); H03H 9/02 (2006.01); H03H 9/145 (2006.01);
U.S. Cl.
CPC ...
H03H 9/54 (2013.01); H03H 9/02559 (2013.01); H03H 9/25 (2013.01); H03H 9/545 (2013.01); H03H 9/6433 (2013.01); H03H 9/1452 (2013.01); H03H 2210/025 (2013.01);
Abstract
A tunable filter using Love waves includes an inductance for band extension connected to each of piezoelectric resonators, variable capacitances are connected to the piezoelectric resonator, the piezoelectric resonators each include a LiNbOsubstrate and an IDT electrode, and a pass band and an attenuation region are positioned in a frequency region on a lower frequency side relative to a value obtained by a calculation in which an acoustic velocity of a low-velocity transversal wave propagating in the LiNbOsubstrate is divided by a wave length defined by a period of the IDT electrode.