GB2288937B - SAW filter - Google Patents

SAW filter

Info

Publication number
GB2288937B
GB2288937B GB9418975A GB9418975A GB2288937B GB 2288937 B GB2288937 B GB 2288937B GB 9418975 A GB9418975 A GB 9418975A GB 9418975 A GB9418975 A GB 9418975A GB 2288937 B GB2288937 B GB 2288937B
Authority
GB
United Kingdom
Prior art keywords
saw filter
saw
filter
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.)
Expired - Fee Related
Application number
GB9418975A
Other versions
GB9418975D0 (en
GB2288937A (en
Inventor
Sergei N Kondratyev
Victor P Plessky
Clinton S Hartmann
Thor Thorvaldsson
David Picton Morgan
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.)
Advanced Saw Products SA
Nokia Oyj
Original Assignee
Advanced Saw Products SA
Nokia Mobile Phones Ltd
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
Priority claimed from GB9408188A external-priority patent/GB2289181B/en
Priority claimed from GB9408181A external-priority patent/GB2289180B/en
Application filed by Advanced Saw Products SA, Nokia Mobile Phones Ltd filed Critical Advanced Saw Products SA
Publication of GB9418975D0 publication Critical patent/GB9418975D0/en
Priority to US08/427,344 priority Critical patent/US5646584A/en
Priority to JP09834695A priority patent/JP3606944B2/en
Publication of GB2288937A publication Critical patent/GB2288937A/en
Application granted granted Critical
Publication of GB2288937B publication Critical patent/GB2288937B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/643—Means for obtaining a particular transfer characteristic the transfer characteristic being determined by reflective or coupling array characteristics
    • 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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02685—Grating lines having particular arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
GB9418975A 1994-04-25 1994-09-21 SAW filter Expired - Fee Related GB2288937B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US08/427,344 US5646584A (en) 1994-04-25 1995-04-24 Saw filter including electrodes of opposing polarity
JP09834695A JP3606944B2 (en) 1994-04-25 1995-04-24 SAW filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9408188A GB2289181B (en) 1994-04-25 1994-04-25 Saw filter
GB9408181A GB2289180B (en) 1994-04-25 1994-04-25 Saw filter

Publications (3)

Publication Number Publication Date
GB9418975D0 GB9418975D0 (en) 1994-11-09
GB2288937A GB2288937A (en) 1995-11-01
GB2288937B true GB2288937B (en) 1998-06-10

Family

ID=26304767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9418975A Expired - Fee Related GB2288937B (en) 1994-04-25 1994-09-21 SAW filter

Country Status (1)

Country Link
GB (1) GB2288937B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19638627B4 (en) * 1996-09-20 2007-09-27 Epcos Ag Surface acoustic wave (SAW) filter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003690A1 (en) * 1988-09-28 1990-04-05 Siemens Aktiengesellschaft Surface wave filter
WO1993008641A1 (en) * 1991-10-18 1993-04-29 Thomson-Csf Surface wave filter having a folded acoustic path

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003690A1 (en) * 1988-09-28 1990-04-05 Siemens Aktiengesellschaft Surface wave filter
WO1993008641A1 (en) * 1991-10-18 1993-04-29 Thomson-Csf Surface wave filter having a folded acoustic path

Also Published As

Publication number Publication date
GB9418975D0 (en) 1994-11-09
GB2288937A (en) 1995-11-01

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110921