JPWO2010004686A1 - 弾性波装置及びラダー型フィルタ装置 - Google Patents
弾性波装置及びラダー型フィルタ装置 Download PDFInfo
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- JPWO2010004686A1 JPWO2010004686A1 JP2010519625A JP2010519625A JPWO2010004686A1 JP WO2010004686 A1 JPWO2010004686 A1 JP WO2010004686A1 JP 2010519625 A JP2010519625 A JP 2010519625A JP 2010519625 A JP2010519625 A JP 2010519625A JP WO2010004686 A1 JPWO2010004686 A1 JP WO2010004686A1
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- 238000010897 surface acoustic wave method Methods 0.000 description 13
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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
- H03H9/0023—Balance-unbalance or balance-balance networks
- H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
- H03H9/0085—Balance-unbalance or balance-balance networks using surface acoustic wave devices having four acoustic tracks
-
- 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
- H03H9/0222—Details of interface-acoustic, boundary, pseudo-acoustic or Stonely 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
- H03H9/02921—Measures for preventing electric discharge due to pyroelectricity
-
- 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
- H03H9/58—Multiple crystal filters
- H03H9/60—Electric coupling means therefor
- H03H9/605—Electric coupling means therefor consisting of a ladder configuration
-
- 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
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6489—Compensation of undesirable effects
-
- 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
- H03H9/703—Networks using bulk acoustic wave devices
- H03H9/706—Duplexers
-
- 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
-
- 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
- H03H9/02992—Details of bus bars, contact pads or other electrical connections for finger electrodes
-
- 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
- H03H9/14517—Means for weighting
- H03H9/1452—Means for weighting by finger overlap length, apodisation
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
IDT電極の交叉幅重み付け:中央における交叉幅が120μmであり、弾性波伝搬方向両端にいくにつれて交叉幅が小さくなり、両端における交叉幅を、12μmとした。
反射器の電極指の本数=20本
反射器の電極指の開口長=20μm
反射器の電極指のピッチで定まる波長λ=3.9μm
反射器の電極指のデューティ=0.5
2…アンテナ端子
3…送信フィルタ
4…受信フィルタ
5…接続点
6…出力端子
7…送信端子
8…入力端子
9,10…第1,2の受信端子
11…インダクタンス
12,13…接続点
14…抵抗
17…圧電基板
18…電極構造
19…誘電体
21…IDT電極
22,23…反射器
24…IDT電極
25,26…反射器
27…共通バスバー
29…バスバー
31…弾性波共振子
32,33…縦結合共振子型弾性波フィルタ部
34,35…縦結合共振子型弾性波フィルタ部
41…圧電薄膜共振子
42…基板
43…空洞
44…圧電薄膜
45…第1の共振電極
46…第2の共振電極
47…支持膜
C1,C2…コンデンサ
L1〜L5…インダクタンス
P1〜P7…並列腕共振子
S1〜S7…直列腕共振子
Claims (5)
- 互いに直列に接続された複数の弾性波共振子と、
前記複数の弾性波共振子のうち少なくとも1つの弾性波共振子に並列に接続された抵抗とを備え、前記複数の弾性波共振子のうち、前記少なくとも1つの弾性波共振子を除いた残りの弾性波共振子には並列に抵抗が接続されていない、弾性波装置。 - 前記抵抗が並列に接続された少なくとも1つの前記弾性波共振子のインピーダンスの総和が、前記残りの弾性波共振子のインピーダンスの総和よりも大きい、請求項1に記載の弾性波装置。
- 入力端子と、
出力端子と、
前記入力端子と出力端子との間に延びる直列腕に設けられた複数の直列腕共振子と、
前記直列腕とグラウンド電位との間に延びる少なくとも1つの並列腕に設けられた並列腕共振子とを備え、
前記直列腕共振子及び並列腕共振子のうち少なくとも1つの弾性波共振子が、請求項1または2に記載の弾性波装置からなる、ラダー型フィルタ装置。 - 前記並列腕共振子が、前記入力端子と前記グラウンド電位との間及び前記出力端子と前記グラウンド電位との間に少なくとも一方に設けられた第1の並列腕共振子と、隣り合う直列腕共振子との間の接続点のうちの少なくとも1つの接続点とグラウンド電位との間に設けられた第2の並列腕共振子とを有し、前記第1の並列腕共振子が前記弾性波装置からなる、請求項3に記載のラダー型フィルタ装置。
- 前記直列腕共振子のうち少なくとも1つの直列腕共振子が前記弾性波装置からなる、請求項3に記載のラダー型フィルタ装置。
Priority Applications (1)
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JP2010519625A JP5141766B2 (ja) | 2008-07-10 | 2009-06-12 | 弾性波装置及びラダー型フィルタ装置 |
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JP2008180569 | 2008-07-10 | ||
JP2008180569 | 2008-07-10 | ||
PCT/JP2009/002672 WO2010004686A1 (ja) | 2008-07-10 | 2009-06-12 | 弾性波装置及びラダー型フィルタ装置 |
JP2010519625A JP5141766B2 (ja) | 2008-07-10 | 2009-06-12 | 弾性波装置及びラダー型フィルタ装置 |
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JP2012182017A Division JP5418645B2 (ja) | 2008-07-10 | 2012-08-21 | ラダー型フィルタ装置 |
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JPWO2010004686A1 true JPWO2010004686A1 (ja) | 2011-12-22 |
JP5141766B2 JP5141766B2 (ja) | 2013-02-13 |
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JP2010519625A Active JP5141766B2 (ja) | 2008-07-10 | 2009-06-12 | 弾性波装置及びラダー型フィルタ装置 |
JP2012182017A Active JP5418645B2 (ja) | 2008-07-10 | 2012-08-21 | ラダー型フィルタ装置 |
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US (1) | US8188812B2 (ja) |
JP (2) | JP5141766B2 (ja) |
WO (1) | WO2010004686A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2012020595A1 (ja) * | 2010-08-11 | 2012-02-16 | 株式会社村田製作所 | 高周波モジュール及び通信機 |
WO2013154113A1 (ja) * | 2012-04-10 | 2013-10-17 | 株式会社村田製作所 | ラダー型弾性表面波フィルタ |
JP6411292B2 (ja) * | 2015-06-26 | 2018-10-24 | 太陽誘電株式会社 | ラダー型フィルタ、デュプレクサおよびモジュール |
JP6465047B2 (ja) * | 2016-02-19 | 2019-02-06 | 株式会社村田製作所 | 弾性波共振子、帯域通過型フィルタ及びデュプレクサ |
CN108781065B (zh) * | 2016-03-08 | 2022-05-17 | 株式会社村田制作所 | 弹性波装置 |
CN109417370B (zh) * | 2016-06-24 | 2020-04-03 | 株式会社村田制作所 | 弹性波元件及弹性波滤波器装置 |
JP6729702B2 (ja) | 2016-08-10 | 2020-07-22 | 株式会社村田製作所 | 弾性波装置及びラダー型フィルタ |
JP6669262B2 (ja) * | 2016-09-02 | 2020-03-18 | 株式会社村田製作所 | 弾性波フィルタ装置、高周波フロントエンド回路及び通信装置 |
JP7215413B2 (ja) * | 2019-12-27 | 2023-01-31 | 株式会社村田製作所 | 弾性波フィルタ |
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DE4307726C1 (de) * | 1993-03-11 | 1994-07-28 | Siemens Matsushita Components | Mit akustischen Oberflächenwellen arbeitendes Bauelement |
DE4414160C1 (de) * | 1994-04-22 | 1995-12-21 | Siemens Matsushita Components | Mit akustischen Oberflächenwellen arbeitendes Bauelement, insbesondere Oberflächenwellenfilter |
JPH09205343A (ja) * | 1996-01-24 | 1997-08-05 | Murata Mfg Co Ltd | 弾性表面波フィルタ |
JP3720930B2 (ja) | 1996-11-18 | 2005-11-30 | 株式会社東芝 | 弾性表面波フィルタおよび通過周波数帯域の形成方法 |
JPH11251871A (ja) * | 1998-03-06 | 1999-09-17 | Oki Electric Ind Co Ltd | 弾性表面波分波器の受信用フィルタ |
JP2000183680A (ja) * | 1998-12-11 | 2000-06-30 | Tdk Corp | 弾性表面波装置 |
JP3290165B2 (ja) * | 1999-11-17 | 2002-06-10 | 東洋通信機株式会社 | ラダー型弾性表面波フィルタ |
JP4352572B2 (ja) * | 2000-04-03 | 2009-10-28 | パナソニック株式会社 | アンテナ共用器 |
JP4230347B2 (ja) * | 2003-12-19 | 2009-02-25 | 富士通メディアデバイス株式会社 | 弾性表面波フィルタ |
JP4697528B2 (ja) * | 2004-06-02 | 2011-06-08 | 太陽誘電株式会社 | 弾性波装置 |
JP2006101082A (ja) * | 2004-09-29 | 2006-04-13 | Kyocera Corp | 弾性表面波装置および通信装置 |
US20060139832A1 (en) | 2004-12-29 | 2006-06-29 | Hewlett-Packard Development Company, L.P. | Common mode surge protection filter |
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2009
- 2009-06-12 JP JP2010519625A patent/JP5141766B2/ja active Active
- 2009-06-12 WO PCT/JP2009/002672 patent/WO2010004686A1/ja active Application Filing
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2011
- 2011-01-05 US US12/984,621 patent/US8188812B2/en active Active
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Publication number | Publication date |
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JP5418645B2 (ja) | 2014-02-19 |
US8188812B2 (en) | 2012-05-29 |
JP5141766B2 (ja) | 2013-02-13 |
JP2013009408A (ja) | 2013-01-10 |
WO2010004686A1 (ja) | 2010-01-14 |
US20110095844A1 (en) | 2011-04-28 |
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