JP4270206B2 - 弾性表面波分波器 - Google Patents
弾性表面波分波器 Download PDFInfo
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- JP4270206B2 JP4270206B2 JP2005506151A JP2005506151A JP4270206B2 JP 4270206 B2 JP4270206 B2 JP 4270206B2 JP 2005506151 A JP2005506151 A JP 2005506151A JP 2005506151 A JP2005506151 A JP 2005506151A JP 4270206 B2 JP4270206 B2 JP 4270206B2
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- 238000010897 surface acoustic wave method Methods 0.000 title claims description 262
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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
- H03H9/6433—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
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic 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
- H03H9/02—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
-
- 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
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
- H03H9/1071—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the SAW device
-
- 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
- H03H9/6436—Coupled resonator filters having one acoustic track only
-
- 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
-
- 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
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1716—Comprising foot-point elements
- H03H7/1725—Element to ground being common to different shunt paths, i.e. Y-structure
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1758—Series LC in shunt or branch path
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1766—Parallel LC in series path
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1775—Parallel LC in shunt or branch path
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1783—Combined LC in series path
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Filters And Equalizers (AREA)
- Transceivers (AREA)
Description
5500/fH≧2×P …(1)
6800/fL≦2×P≦16500/fH …(2)
18800/fL≦2×P …(3)
但し、上記式(1)〜(3)において、fHは、受信側弾性表面波フィルタの通過帯域の上限周波数を、fLは、送信側弾性表面波フィルタの通過帯域の下限周波数を意味し、Pは、櫛形電極の電極指ピッチ(電極指の幅と、電極指間のスペースの和)である。
表1に示した場合に準じて、Ca=1.3pF、Cb=1.3pF及びCc=2.35pFを代入すると、Cz=3.3pFと大きな値となる。
6800/fL≦2×P≦16500/fH …式(2)
18800/fL≦2×P …式(3)
6.15×10−6≧2×P
8.25×10−6≦2×P≦18.5×10−6
22.8×10−6≦2×P
のいずれかを満たすように櫛形電極を構成すればよい。上記実施形態では、櫛形の電極指ピッチPは、前述したように4.5μmとされているため、上記条件を満たし、従って、良好なフィルタ特性を得ることができる。
6800/fL≦2×P≦16500/fH …式(5)
18800/fL≦2×P …式(6)
5500/(2×fTH)≧2×P …式(7)
6800/(2×fTL)≦2×P≦16500/(2×fTH)
…式(8)
18800/(2×fTL)≦2×P …式(9)
5500/(3×fTH)≧2×P …式(10)
6800/(3×fTL)≦2×P≦16500/(3×fTH)
…式(11)
18800/(3×fTL)≦2×P …式(12)
(2)1.37〜1.62μm
(3)2.06〜3.08μm
(4)4.13〜4.86μm
(5)5.70〜9.22μm
(6)11.4μm以上
Claims (2)
- アンテナ端子と、第1〜第3の共通端子と、
前記アンテナ端子に接続されており、圧電基板を用いて構成された送信側弾性表面波フィルタと、
前記アンテナ端子に接続されており、圧電基板を用いて構成された受信側弾性表面波フィルタと、
前記送信側弾性表面波フィルタ及び前記受信側弾性表面波フィルタが搭載されたパッケージ材と、
前記送信側弾性表面波フィルタ及び前記受信側弾性表面波フィルタに接続されており、前記第1〜第3の共通端子間にΔ型に接続された第1〜第3の容量素子と、前記第1の共通端子とアース電位との間に接続された第1のインダクタと、前記第2,第3の共通端子間に接続された第2のインダクタとを有する高周波素子とを備え、
前記高周波素子は、前記第2のインダクタと前記第1〜第3の容量素子のうちの前記第2のインダクタに並列に接続されている容量素子との***振により、前記送信側弾性表面波フィルタの通過帯域の2倍波もしくはその近傍に発生する第1のトラップの減衰極と、前記第1〜第3の容量素子の前記Δ型接続と等価なT型接続において求められた容量と前記第1のインダクタとの共振によって、前記送信側弾性表面波フィルタの通過帯域の3倍波もしくはその近傍に発生する第2のトラップの減衰極とを有し、
前記容量素子は、前記送信側弾性表面波フィルタ及び/または前記受信側弾性表面波フィルタを構成している前記圧電基板上に形成された櫛形電極により構成されており、
前記櫛形電極の電極指ピッチに沿う方向が、前記櫛形電極が形成されている弾性表面波フィルタにおいて表面波が伝搬する方向に対して直交する方向とされており、
前記容量素子によって発生するインピーダンス特性のリップルが、前記送信側弾性表面波フィルタの通過帯域及び前記受信側弾性表面波フィルタの通過帯域の2倍波及び3倍波並びにその近傍に位置しないように前記櫛形電極の電極指ピッチが定められており、
前記受信側弾性表面波フィルタ及び前記送信側弾性表面波フィルタを構成している前記圧電基板がLiTaO 3 基板であり、
前記櫛形電極の電極指の周期が、下記の式(1)〜(3)の範囲にあることを特徴とする弾性表面波分波器。
5500/fH≧2×P …(1)
6800/fL≦2×P≦16500/fH …(2)
18800/fL≦2×P …(3)
但し、上記式(1)〜(3)において、
fHは、受信側弾性表面波フィルタの通過帯域の上限周波数を、
fLは、送信側弾性表面波フィルタの通過帯域の下限周波数を意味し、
Pは、櫛形電極の電極指ピッチ(電極指の幅と、電極指間のスペースの和)である。 - 前記パッケージ材内に設けられた位相調整用ストリップラインをさらに備え、
前記第2のインダクタが、前記パッケージ材内の前記位相調整用ストリップラインが設けられている層を含む複数の層にわたって形成されていることを特徴とする、請求項1に記載の弾性表面波分波器。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003135329 | 2003-05-14 | ||
JP2003135329 | 2003-05-14 | ||
PCT/JP2004/004782 WO2004102798A1 (ja) | 2003-05-14 | 2004-04-01 | 弾性表面波分波器 |
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JP2008118282A Division JP2008245310A (ja) | 2003-05-14 | 2008-04-30 | 弾性表面波分波器 |
Publications (2)
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JPWO2004102798A1 JPWO2004102798A1 (ja) | 2006-07-13 |
JP4270206B2 true JP4270206B2 (ja) | 2009-05-27 |
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JP2008118282A Pending JP2008245310A (ja) | 2003-05-14 | 2008-04-30 | 弾性表面波分波器 |
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US (1) | US20040227585A1 (ja) |
JP (2) | JP4270206B2 (ja) |
CN (1) | CN100472963C (ja) |
WO (1) | WO2004102798A1 (ja) |
Cited By (1)
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JP3525408B2 (ja) * | 1998-05-07 | 2004-05-10 | 富士通株式会社 | 分波器パッケージ |
JP2000209061A (ja) * | 1999-01-12 | 2000-07-28 | Toshiba Corp | 弾性表面波素子および弾性表面波装置 |
JP2001313542A (ja) * | 2000-04-28 | 2001-11-09 | Oki Electric Ind Co Ltd | 分波器 |
JP3363870B2 (ja) * | 2000-05-29 | 2003-01-08 | 沖電気工業株式会社 | 弾性表面波分波器 |
JP4245265B2 (ja) * | 2000-09-29 | 2009-03-25 | 京セラ株式会社 | 複数のフィルタを有する多層配線基板 |
JP2002353775A (ja) * | 2001-03-23 | 2002-12-06 | Sanyo Electric Co Ltd | フィルタユニット及び該フィルタユニットを用いたデュプレクサ |
JP3509773B2 (ja) * | 2001-04-26 | 2004-03-22 | 株式会社村田製作所 | 弾性表面波装置、通信装置 |
JP2002330055A (ja) * | 2001-04-27 | 2002-11-15 | Tdk Corp | 表面弾性波フィルタ、表面弾性波フィルタ用パッケージ及び表面弾性波フィルタモジュール |
JP3900013B2 (ja) * | 2001-07-30 | 2007-04-04 | 株式会社村田製作所 | 弾性表面波分波器、通信装置 |
-
2003
- 2003-05-14 US US10/437,239 patent/US20040227585A1/en not_active Abandoned
-
2004
- 2004-04-01 CN CNB2004800016771A patent/CN100472963C/zh not_active Expired - Lifetime
- 2004-04-01 JP JP2005506151A patent/JP4270206B2/ja not_active Expired - Lifetime
- 2004-04-01 WO PCT/JP2004/004782 patent/WO2004102798A1/ja active Application Filing
-
2008
- 2008-04-30 JP JP2008118282A patent/JP2008245310A/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2433498A2 (fr) | 2010-09-22 | 2012-03-28 | Didier Lepretre | Procédé pour fabriquer des graines ayant un effet répulsif envers les oiseaux et graine associée obtenue par le procédé |
Also Published As
Publication number | Publication date |
---|---|
WO2004102798A1 (ja) | 2004-11-25 |
CN1720659A (zh) | 2006-01-11 |
US20040227585A1 (en) | 2004-11-18 |
JP2008245310A (ja) | 2008-10-09 |
JPWO2004102798A1 (ja) | 2006-07-13 |
CN100472963C (zh) | 2009-03-25 |
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