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Patent Searching and Data


Title:
SURFACE ELASTIC WAVE FILTER
Document Type and Number:
Japanese Patent JPH066171
Kind Code:
A
Abstract:

PURPOSE: To obtain the surface acoustic wave filter with a low loss and high selectively by implementing weighing so as not to increase an insertion loss concerning to the multi-electrode type surface acoustic wave filter used for a communication equipment or the like.

CONSTITUTION: At least one of plural interdigital electrode finger pairs 11, 12 being components of a multi-electrode type surface acoustic wave filter lets all crossing lengths equalize and at least one electrode finger pair is made up of regular electrode fingers 13 and divided electrode fingers 14 divided on the way of a crossing length. Thus, the surface acoustic wave filter with an excellent outside band characteristic is obtained without increase in the insertion loss due to weighing.


Inventors:
MATSUI ATSUSHI
Application Number:
JP15916792A
Publication Date:
January 14, 1994
Filing Date:
June 18, 1992
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H03H9/25; (IPC1-7): H03H9/25
Attorney, Agent or Firm:
Akira Kobiji (2 outside)