JP6593554B2 - 弾性表面波共振子、弾性表面波フィルタおよびデュプレクサ - Google Patents
弾性表面波共振子、弾性表面波フィルタおよびデュプレクサ Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02937—Means for compensation or elimination of undesirable effects of chemical damage, e.g. corrosion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6433—Coupled resonator filters
- H03H9/6483—Ladder SAW filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/08—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of resonators or networks using surface acoustic waves
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02834—Means for compensation or elimination of undesirable effects of temperature influence
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02929—Means for compensation or elimination of undesirable effects of ageing changes of characteristics, e.g. electro-acousto-migration
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14538—Formation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6426—Combinations of the characteristics of different transducers
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- H—ELECTRICITY
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- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6433—Coupled resonator filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H9/72—Networks using surface acoustic waves
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H9/72—Networks using surface acoustic waves
- H03H9/725—Duplexers
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Description
一方、比較例では、3つの弾性表面波共振子の電極比率を互いに同一とした。
なお、直列腕共振子および並列腕共振子の各々を構成する弾性表面波共振子において、電極比率L/P以外のパラメータ(電極指ピッチP、交差幅W、電極指5の本数等)は実施例および比較例で同一とした。
Claims (4)
- 第1の弾性表面波共振子と、
前記第1の弾性表面波共振子と直列に接続される第2の弾性表面波共振子と、
前記第2の弾性表面波共振子と直列に接続される第3の弾性表面波共振子とを備え、
前記第1から第3の弾性表面波共振子の各々は、互いの複数本の電極指が弾性波伝搬方向に交互に配列されるように配置された、一対の櫛歯電極を有し、
前記第1から第3の弾性表面波共振子は、前記弾性波伝搬方向に直交する方向に沿って隣接して配列され、
前記第2の弾性表面波共振子は、前記第1および第3の弾性表面波共振子に比べて、前記電極指のピッチに対する前記電極指の幅の割合が小さい、弾性表面波共振子。 - 第1の信号端子と、
第2の信号端子と、
前記第1の信号端子と前記第2の信号端子との間に接続され、複数の共振子群を有するラダー型フィルタとを備え、
前記複数の共振子群の少なくとも1つは、弾性表面波共振子により形成されており、
前記弾性表面波共振子は、
第1の弾性表面波共振子と、
前記第1の弾性表面波共振子と直列に接続される第2の弾性表面波共振子と、
前記第2の弾性表面波共振子と直列に接続される第3の弾性表面波共振子とを含み、
前記第1から第3の弾性表面波共振子の各々は、互いの複数本の電極指が弾性波伝搬方向に交互に配列されるように配置された、一対の櫛歯電極を有し、
前記第2の弾性表面波共振子は、前記第1および第3の弾性表面波共振子に比べて、前記電極指のピッチに対する前記電極指の幅の割合が小さい、弾性表面波フィルタ。 - 前記ラダー型フィルタは、前記第1の信号端子に入力される信号をフィルタリングして前記第2の信号端子に出力するように構成され、
前記複数の共振子群は、前記第1の信号端子と前記第2の信号端子との間に、直列に接続されてなる直列腕共振子を含み、
前記第1の信号端子に最も近い前記直列腕共振子は、前記第1から第3の弾性表面波共振子を含む、請求項2に記載の弾性表面波フィルタ。 - 請求項2または3に記載の弾性表面波フィルタを有する送信フィルタと、
第3の信号端子と、
前記第2の信号端子および前記ラダー型フィルタの接続点と、前記第3の信号端子との間に接続される受信フィルタとを備える、デュプレクサ。
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JP2016249026 | 2016-12-22 | ||
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PCT/JP2017/045973 WO2018117231A1 (ja) | 2016-12-22 | 2017-12-21 | 弾性表面波共振子、弾性表面波フィルタおよびデュプレクサ |
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US (1) | US10938377B2 (ja) |
JP (1) | JP6593554B2 (ja) |
KR (1) | KR102251952B1 (ja) |
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CN112805919B (zh) * | 2018-10-18 | 2024-01-19 | 株式会社村田制作所 | 弹性波装置、带通型滤波器、双工器以及多工器 |
WO2024128020A1 (ja) * | 2022-12-12 | 2024-06-20 | 京セラ株式会社 | 弾性波共振子、フィルタデバイスおよび通信装置 |
CN115987246A (zh) * | 2023-02-02 | 2023-04-18 | 无锡市好达电子股份有限公司 | 高隔离度声表面波双工器及多工器 |
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EP0757438B1 (en) * | 1995-07-25 | 2001-08-16 | Murata Manufacturing Co., Ltd. | Surface acoustic wave device |
JPH09205343A (ja) | 1996-01-24 | 1997-08-05 | Murata Mfg Co Ltd | 弾性表面波フィルタ |
WO2006016544A1 (ja) * | 2004-08-11 | 2006-02-16 | Murata Manufacturing Co., Ltd. | デュプレクサ及び通信装置 |
JP5394847B2 (ja) * | 2009-08-06 | 2014-01-22 | 太陽誘電株式会社 | 分波器 |
JP5562063B2 (ja) * | 2010-02-22 | 2014-07-30 | 京セラ株式会社 | 弾性表面波装置 |
CN102823130B (zh) * | 2010-05-13 | 2014-12-10 | 株式会社村田制作所 | 弹性波装置 |
DE112011103018B4 (de) | 2010-09-10 | 2016-03-24 | Murata Manufacturing Co., Ltd. | Verzweigungsfilter für elastische Wellen |
JP5672050B2 (ja) * | 2011-02-21 | 2015-02-18 | 株式会社村田製作所 | 弾性表面波フィルタ装置 |
JP2014033377A (ja) * | 2012-08-06 | 2014-02-20 | Panasonic Corp | アンテナ共用器 |
DE102012112237A1 (de) * | 2012-12-13 | 2014-06-18 | Epcos Ag | Elektroakustisches Bandpassfilter mit geglätteter Einfügedämpfung |
US9294266B2 (en) * | 2013-06-27 | 2016-03-22 | Qualcomm Incorporated | Method and apparatus to encrypt plaintext data |
JP5768951B1 (ja) * | 2014-01-07 | 2015-08-26 | 株式会社村田製作所 | フィルタ装置 |
JP6344161B2 (ja) * | 2014-09-03 | 2018-06-20 | 株式会社村田製作所 | ラダー型フィルタ及びデュプレクサ |
JP6411295B2 (ja) * | 2014-10-16 | 2018-10-24 | 太陽誘電株式会社 | 弾性波デバイス、フィルタ、及び分波器 |
US10097158B2 (en) * | 2014-10-16 | 2018-10-09 | Taiyo Yuden Co., Ltd. | Acoustic wave device, filter, and duplexer |
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JPWO2018117231A1 (ja) | 2019-07-18 |
KR102251952B1 (ko) | 2021-05-14 |
WO2018117231A1 (ja) | 2018-06-28 |
KR20190066063A (ko) | 2019-06-12 |
US20190296714A1 (en) | 2019-09-26 |
CN110089029A (zh) | 2019-08-02 |
CN110089029B (zh) | 2023-03-28 |
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