WO2003001668A1 - Dispositif a ondes acoustiques de surface - Google Patents

Dispositif a ondes acoustiques de surface Download PDF

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Publication number
WO2003001668A1
WO2003001668A1 PCT/JP2001/005422 JP0105422W WO03001668A1 WO 2003001668 A1 WO2003001668 A1 WO 2003001668A1 JP 0105422 W JP0105422 W JP 0105422W WO 03001668 A1 WO03001668 A1 WO 03001668A1
Authority
WO
WIPO (PCT)
Prior art keywords
surface acoustic
acoustic wave
wave filter
pass band
connection point
Prior art date
Application number
PCT/JP2001/005422
Other languages
English (en)
Japanese (ja)
Inventor
Tsutomu Nagatsuka
Koji Ibata
Koichiro Misu
Kenji Yoshida
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP2001/005422 priority Critical patent/WO2003001668A1/fr
Priority to JP2002586706A priority patent/JPWO2003001668A1/ja
Publication of WO2003001668A1 publication Critical patent/WO2003001668A1/fr

Links

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
    • H03H9/70—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
    • H03H2240/00—Indexing scheme relating to filter banks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2250/00—Indexing scheme relating to dual- or multi-band filters

Definitions

  • connection point 3 In this type of conventional surface acoustic wave device, in order to reduce the effect of connecting one filter to the other in the pass band of one filter, the impedance of the other filter viewed from connection point 3 becomes infinite. It is desirable to be close.
  • FIG. 12 is an explanatory diagram showing a pass frequency characteristic of the surface acoustic wave device according to Embodiment 2 of the present invention.
  • a first surface acoustic wave filter 1 is a band pass filter having a first pass band
  • a second surface acoustic wave filter 2 is a band pass filter having a second pass band.
  • the first surface acoustic wave filter 1 and the second surface acoustic wave filter 2 have their input terminals and output terminals connected at a first connection point 31 and a second connection point 32, respectively.
  • Each terminal is connected to one terminal pair surface acoustic wave resonator 4.
  • FIG. 8 shows transmission frequency characteristics of the surface acoustic wave device having the configuration of FIG. 1 showing the first embodiment of the present invention.
  • the minimum insertion loss in the first pass band is 3.5 dB
  • the minimum insertion loss in the second pass band is 1.9 dB.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

Cette invention concerne un dispositif à ondes acoustiques de surface qui comprend un premier filtre (1) d'ondes acoustiques de surface doté d'une première bande passante, un second filtre (2) d'ondes acoustiques de surface doté d'une seconde bande passante, de fréquence plus élevée que la première bande passante, et des résonateurs d'onde acoustique de surface (4) à paire unique de bornes disposé entre le second (filtre 2) d'onde acoustique de surface et les premiers et seconds points de liaison (31), (32) respectivement. De bonnes caractéristiques passantes sont obtenues intégralement à partir d'une pluralité de bandes passantes.
PCT/JP2001/005422 2001-06-25 2001-06-25 Dispositif a ondes acoustiques de surface WO2003001668A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2001/005422 WO2003001668A1 (fr) 2001-06-25 2001-06-25 Dispositif a ondes acoustiques de surface
JP2002586706A JPWO2003001668A1 (ja) 2001-06-25 2001-06-25 弾性表面波装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/005422 WO2003001668A1 (fr) 2001-06-25 2001-06-25 Dispositif a ondes acoustiques de surface

Publications (1)

Publication Number Publication Date
WO2003001668A1 true WO2003001668A1 (fr) 2003-01-03

Family

ID=11737482

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/005422 WO2003001668A1 (fr) 2001-06-25 2001-06-25 Dispositif a ondes acoustiques de surface

Country Status (2)

Country Link
JP (1) JPWO2003001668A1 (fr)
WO (1) WO2003001668A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006238101A (ja) * 2005-02-25 2006-09-07 Kyocera Kinseki Corp ローパスフィルタ
JP2010087586A (ja) * 2008-09-29 2010-04-15 Fujitsu Media Device Kk 弾性波デバイス

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09121138A (ja) * 1995-08-24 1997-05-06 Fujitsu Ltd フィルタ装置及びこれを用いた無線装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09121138A (ja) * 1995-08-24 1997-05-06 Fujitsu Ltd フィルタ装置及びこれを用いた無線装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006238101A (ja) * 2005-02-25 2006-09-07 Kyocera Kinseki Corp ローパスフィルタ
JP4627198B2 (ja) * 2005-02-25 2011-02-09 京セラキンセキ株式会社 ローパスフィルタ
JP2010087586A (ja) * 2008-09-29 2010-04-15 Fujitsu Media Device Kk 弾性波デバイス
JP4663770B2 (ja) * 2008-09-29 2011-04-06 太陽誘電株式会社 弾性波デバイス

Also Published As

Publication number Publication date
JPWO2003001668A1 (ja) 2004-10-14

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