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Patent Searching and Data


Title:
SURFACE ACOUSTIC WAVE FILTER
Document Type and Number:
WIPO Patent Application WO/2018/145383
Kind Code:
A1
Abstract:
A surface acoustic wave filter, comprising a piezoelectric substrate (100), two interdigital transducers (10, 11) arranged in parallel on the piezoelectric substrate (100), each of the interdigital transducers (10, 11) comprising a first bus bar (101, 111), a second bus bar (102, 112) opposing the first bus bar (101, 111), a plurality of first electrode strips (103, 113) connected with the first bus bar (101, 111), and a plurality of second electrode strips (104, 114) connected with the second bus bar (102, 112), wherein the plurality of first electrode strips (103, 113) are in cross arrangement with the plurality of second electrode strips (104, 114); the first bus bars (101, 111) of the two interdigital transducers (10, 11) extending upward to form two differential input terminals (1, 2), the second bus bars (102, 112) of the two interdigital transducers (10, 11) extending upward to form two differential output terminals (3, 4), and two reflecting gratings (20) being respectively arranged on two sides of the two interdigital transducers (10, 11) for use in reflecting surface acoustic waves produced by the two interdigital transducers (10, 11).

Inventors:
WANG NING (CN)
DONG QIMING (CN)
ZHANG ZHONGYUN (CN)
LIU SHAOKAN (CN)
ZHANG WEI (CN)
Application Number:
PCT/CN2017/088444
Publication Date:
August 16, 2018
Filing Date:
June 15, 2017
Export Citation:
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Assignee:
SHENZHEN HUAYUAN MICRO ELECTRONIC TECH CO LTD (CN)
International Classes:
H03H9/64
Foreign References:
CN106877838A2017-06-20
CN102497173A2012-06-13
CN1983809A2007-06-20
CN103078603A2013-05-01
US20040070469A12004-04-15
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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