Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ELASTIC SURFACE WAVE FILTER
Document Type and Number:
WIPO Patent Application WO/2017/208629
Kind Code:
A1
Abstract:
The present invention is provided with: a longitudinally-coupled filter part (20) that has longitudinally-coupled resonators (22a-22e) formed on the main surface of a LiNbO3 substrate (16); and at least one of a serial arm resonator (10a) that is serially connected to the longitudinally-coupled filter part (20) and a parallel arm resonator (50a) that is parallelly connected to the longitudinally-coupled filter part (20). The duty ratio of IDT electrodes (11a, 11b) of the longitudinally-coupled resonators (22a-22e) are larger than the duty ratio of IDT electrodes (11a, 11b) of at least one of the serial arm resonator (10a) and the parallel arm resonator (50a).

Inventors:
OZASA, Motoki (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2017/014705
Publication Date:
December 07, 2017
Filing Date:
April 10, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H03H9/64; H03H9/145
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (6F Tanaka Ito Pia Shin-Osaka Bldg., 3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-cit, Osaka 11, 〒5320011, JP)
Download PDF: