JP2005072938A - 弾性表面波フィルタ - Google Patents
弾性表面波フィルタ Download PDFInfo
- Publication number
- JP2005072938A JP2005072938A JP2003299585A JP2003299585A JP2005072938A JP 2005072938 A JP2005072938 A JP 2005072938A JP 2003299585 A JP2003299585 A JP 2003299585A JP 2003299585 A JP2003299585 A JP 2003299585A JP 2005072938 A JP2005072938 A JP 2005072938A
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- JP
- Japan
- Prior art keywords
- acoustic wave
- surface acoustic
- transmission line
- wave filter
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010897 surface acoustic wave method Methods 0.000 title claims abstract description 71
- 230000005540 biological transmission Effects 0.000 claims abstract description 113
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000002955 isolation Methods 0.000 description 14
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000005684 electric field Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0566—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers
- H03H9/0576—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers including surface acoustic wave [SAW] devices
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
【解決手段】上記目的を達成するために、一端が弾性表面波素子16と接続され他端が第1のグランド電極4に接続された少なくとも一つ以上の伝送線路6〜10を、使用周波数の波長以下の間隔でグランド電極4に接続した伝送線路11で仕切ったものである。すなわち一端が弾性表面波素子と接続され、他端がグランドに接続された複数個の伝送線路の間にグランドを介在させることになり、端子間のアイソレーションを大きく取ることによりフィルタ特性を向上させることができる。
【選択図】図1
Description
2 受信端子
3 アンテナ端子
4 第1のグランド電極
5 第1の誘電体層
6,7,8,9,10,11 伝送線路
12 第2の誘電体層
13 第2のグランド電極
14 キャビティ
15 金属板
16 弾性表面波素子
17a,17b,17c,17d,17e,17f,17g,17h,17i,17j,17k,17l 電極パッド
18,19,20,21,22 ビアホール
23,24,25,26,27,28 ビアホール
29,30,31,32,33,34,35 ビアホール
36 入力端子
37 第1の直列腕
38 第1の並列腕
39 第2の直列腕
40 第2の並列腕
41 出力端子
42 第1のインダクタ
43 第2のインダクタ
44 第3のインダクタ
45 第3の誘電体層
46 伝送線路
47,48 ビアホール
49 伝送線路
50,51,52,53,54,55,56 ビアホール
57,58,59,60 ビアホール
61,62,63,64,65,66,67 ビアホール
Claims (13)
- 一端が弾性表面波素子と接続され、他端がグランドに接続された少なくとも一つ以上の伝送線路を、使用周波数の波長以下の間隔でグランドに接続した伝送線路で仕切った弾性表面波フィルタ。
- 弾性表面波素子で直列腕と並列腕を形成した請求項1に記載の弾性表面波フィルタ。
- 伝送線路を少なくとも一つ以上の誘電体層上に形成した請求項1に記載の弾性表面波フィルタ。
- 金属板で弾性表面波素子を覆う構成とした請求項1に記載の弾性表面波フィルタ。
- 伝送線路を形成した層をグランド層で挟み、各々のグランド層をビアホールで接続した請求項1に記載の弾性表面波フィルタ。
- ビアホールの直径が接続する伝送線路の線幅よりも小さくした請求項1に記載の弾性表面波フィルタ。
- 使用周波数の波長以下の間隔でグランドに接続した伝送線路が少なくとも一つ以上の分岐を有した請求項1に記載の弾性表面波フィルタ。
- 使用周波数の波長以下の間隔でグランドに接続した伝送線路が少なくとも一つ以上の部分で45°もしくは90°の角度を持った伝送線路とした請求項1に記載の弾性表面波フィルタ。
- 角度を持った部分がビアホールによりグランド電極と接続された請求項8に記載の弾性表面波フィルタ。
- 送信端子と受信端子とアンテナ端子を使用周波数の波長以下の間隔でグランドに接続した伝送線路で仕切った弾性表面波フィルタ。
- 通過帯よりも減衰帯が高い周波数を用いた請求項1または請求項10に記載の弾性表面波フィルタ。
- 通過帯が60MHz以上とした請求項1または請求項10に記載の弾性表面波フィルタ。
- 減衰帯が60MHz以上とした請求項1または請求項10に記載の弾性表面波フィルタ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003299585A JP4389521B2 (ja) | 2003-08-25 | 2003-08-25 | 弾性波フィルタ |
PCT/JP2004/012324 WO2005020436A1 (ja) | 2003-08-25 | 2004-08-20 | 弾性表面波フィルタ |
EP04772280A EP1659689A4 (en) | 2003-08-25 | 2004-08-20 | SURFACE WAVE FILTER |
CNB2004800009299A CN100477519C (zh) | 2003-08-25 | 2004-08-20 | 表面声波滤波器 |
US10/526,919 US7183878B2 (en) | 2003-08-25 | 2004-08-20 | Surface acoustic wave filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003299585A JP4389521B2 (ja) | 2003-08-25 | 2003-08-25 | 弾性波フィルタ |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009135855A Division JP4935858B2 (ja) | 2009-06-05 | 2009-06-05 | 弾性波フィルタ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005072938A true JP2005072938A (ja) | 2005-03-17 |
JP4389521B2 JP4389521B2 (ja) | 2009-12-24 |
Family
ID=34213767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003299585A Expired - Lifetime JP4389521B2 (ja) | 2003-08-25 | 2003-08-25 | 弾性波フィルタ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7183878B2 (ja) |
EP (1) | EP1659689A4 (ja) |
JP (1) | JP4389521B2 (ja) |
CN (1) | CN100477519C (ja) |
WO (1) | WO2005020436A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009034101B4 (de) * | 2009-07-21 | 2017-02-02 | Epcos Ag | Filterschaltung mit verbesserter Filtercharakteristik |
JP6010292B2 (ja) * | 2011-11-01 | 2016-10-19 | 太陽誘電株式会社 | 弾性波デバイス |
JP5510694B1 (ja) * | 2012-08-30 | 2014-06-04 | 株式会社村田製作所 | 弾性波フィルタ装置及びデュプレクサ |
US10249567B2 (en) | 2017-08-18 | 2019-04-02 | Industrial Technology Research Institute | Redistribution layer structure of semiconductor package |
US10622326B2 (en) * | 2017-08-18 | 2020-04-14 | Industrial Technology Research Institute | Chip package structure |
CN107508018B (zh) * | 2017-09-06 | 2020-11-17 | 嘉兴佳利电子有限公司 | 一种多层超宽带滤波器 |
CN112729595A (zh) * | 2021-02-02 | 2021-04-30 | 上海航天电子有限公司 | 延迟线型声表面波传感器及其制作方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5202652A (en) * | 1989-10-13 | 1993-04-13 | Hitachi, Ltd. | Surface acoustic wave filter device formed on a plurality of piezoelectric substrates |
JPH066111A (ja) * | 1992-06-18 | 1994-01-14 | Mitsubishi Electric Corp | 複合デュプレックスフィルタ |
JPH07106811A (ja) * | 1993-09-29 | 1995-04-21 | Matsushita Electron Corp | 高周波回路 |
JPH07226607A (ja) * | 1994-02-10 | 1995-08-22 | Hitachi Ltd | 分波器、分波器モジュールおよび無線通信装置 |
JPH10313229A (ja) | 1997-05-13 | 1998-11-24 | Mitsubishi Electric Corp | 多端子対sawフィルタ及びその使用方法 |
JP2002141771A (ja) * | 2000-08-21 | 2002-05-17 | Murata Mfg Co Ltd | 弾性表面波フィルタ装置 |
JP2002231849A (ja) * | 2001-01-30 | 2002-08-16 | Nec Corp | 高周波装置 |
US6985712B2 (en) * | 2001-08-27 | 2006-01-10 | Matsushita Electric Industrial Co., Ltd. | RF device and communication apparatus using the same |
US6750737B2 (en) * | 2001-10-02 | 2004-06-15 | Matsushita Electric Industrial Co., Ltd. | High frequency switch and radio communication apparatus with layered body for saw filter mounting |
US7076216B2 (en) * | 2002-09-17 | 2006-07-11 | Hitachi Metals, Ltd. | High-frequency device, high-frequency module and communications device comprising them |
US6822537B1 (en) * | 2003-05-14 | 2004-11-23 | Murata Manufacturing Co., Ltd. | Surface acoustic wave branching filter |
JP4381113B2 (ja) * | 2003-11-27 | 2009-12-09 | 三洋電機株式会社 | アンテナ共用器 |
US7196594B2 (en) * | 2004-01-29 | 2007-03-27 | Triquint, Inc. | Surface acoustic wave duplexer having enhanced isolation performance |
-
2003
- 2003-08-25 JP JP2003299585A patent/JP4389521B2/ja not_active Expired - Lifetime
-
2004
- 2004-08-20 WO PCT/JP2004/012324 patent/WO2005020436A1/ja active Application Filing
- 2004-08-20 US US10/526,919 patent/US7183878B2/en active Active
- 2004-08-20 CN CNB2004800009299A patent/CN100477519C/zh not_active Expired - Lifetime
- 2004-08-20 EP EP04772280A patent/EP1659689A4/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
US7183878B2 (en) | 2007-02-27 |
CN1701509A (zh) | 2005-11-23 |
WO2005020436A1 (ja) | 2005-03-03 |
CN100477519C (zh) | 2009-04-08 |
EP1659689A1 (en) | 2006-05-24 |
US20060164182A1 (en) | 2006-07-27 |
EP1659689A4 (en) | 2011-09-14 |
JP4389521B2 (ja) | 2009-12-24 |
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