EP0818883A3 - Filtre duplex - Google Patents

Filtre duplex Download PDF

Info

Publication number
EP0818883A3
EP0818883A3 EP97304719A EP97304719A EP0818883A3 EP 0818883 A3 EP0818883 A3 EP 0818883A3 EP 97304719 A EP97304719 A EP 97304719A EP 97304719 A EP97304719 A EP 97304719A EP 0818883 A3 EP0818883 A3 EP 0818883A3
Authority
EP
European Patent Office
Prior art keywords
filter
stage
filter stage
stages
saw
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.)
Withdrawn
Application number
EP97304719A
Other languages
German (de)
English (en)
Other versions
EP0818883A2 (fr
Inventor
Harri Närhi
Erkki Niiranen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pulse Finland Oy
Original Assignee
LK Products Oy
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 LK Products Oy filed Critical LK Products Oy
Publication of EP0818883A2 publication Critical patent/EP0818883A2/fr
Publication of EP0818883A3 publication Critical patent/EP0818883A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies

Landscapes

  • Non-Reversible Transmitting Devices (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
EP97304719A 1996-07-11 1997-06-30 Filtre duplex Withdrawn EP0818883A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI962815A FI962815A0 (fi) 1996-07-11 1996-07-11 Duplex-filter
FI962815 1996-07-11

Publications (2)

Publication Number Publication Date
EP0818883A2 EP0818883A2 (fr) 1998-01-14
EP0818883A3 true EP0818883A3 (fr) 1998-09-09

Family

ID=8546372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97304719A Withdrawn EP0818883A3 (fr) 1996-07-11 1997-06-30 Filtre duplex

Country Status (2)

Country Link
EP (1) EP0818883A3 (fr)
FI (1) FI962815A0 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11154804A (ja) * 1997-11-20 1999-06-08 Hitachi Ltd 高周波回路装置
JP3704442B2 (ja) * 1999-08-26 2005-10-12 株式会社日立製作所 無線端末
JP2001345662A (ja) * 2000-05-31 2001-12-14 Murata Mfg Co Ltd デュプレクサ及びそれを用いた移動体通信装置
JP3889351B2 (ja) * 2002-12-11 2007-03-07 Ｔｄｋ株式会社 デュプレクサ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59108407A (ja) * 1982-12-14 1984-06-22 Nec Corp 温度補償型弾性表面波発振器
US4509165A (en) * 1981-12-22 1985-04-02 Nippon Electric Co., Ltd. Miniaturized antenna duplexer using SAW filter
EP0614242A1 (fr) * 1993-03-03 1994-09-07 Lk-Products Oy Filtre électrique
EP0678973A1 (fr) * 1994-04-18 1995-10-25 NEC Corporation Circuit récepteur pour générer un signal de fréquence intermédiaire ayant des caractéristiques de fréquence indépendantes des variations de température

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509165A (en) * 1981-12-22 1985-04-02 Nippon Electric Co., Ltd. Miniaturized antenna duplexer using SAW filter
JPS59108407A (ja) * 1982-12-14 1984-06-22 Nec Corp 温度補償型弾性表面波発振器
EP0614242A1 (fr) * 1993-03-03 1994-09-07 Lk-Products Oy Filtre électrique
EP0678973A1 (fr) * 1994-04-18 1995-10-25 NEC Corporation Circuit récepteur pour générer un signal de fréquence intermédiaire ayant des caractéristiques de fréquence indépendantes des variations de température

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 229 (E - 273) 20 October 1984 (1984-10-20) *

Also Published As

Publication number Publication date
EP0818883A2 (fr) 1998-01-14
FI962815A0 (fi) 1996-07-11

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