GB959462A - Improvements in or relating to high frequency electromechanical filters - Google Patents

Improvements in or relating to high frequency electromechanical filters

Info

Publication number
GB959462A
GB959462A GB647261A GB647261A GB959462A GB 959462 A GB959462 A GB 959462A GB 647261 A GB647261 A GB 647261A GB 647261 A GB647261 A GB 647261A GB 959462 A GB959462 A GB 959462A
Authority
GB
United Kingdom
Prior art keywords
resonators
couplers
filter
extremities
attached
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
Application number
GB647261A
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Publication of GB959462A publication Critical patent/GB959462A/en
Expired 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
    • H03H9/48—Coupling means therefor
    • H03H9/50—Mechanical coupling means

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

959,462. Electromechanical filters. TELEFUNKEN A.G. Feb. 22, 1961 [March 1, 1960], No. 6472/61. Addition to 842,194. Heading H3U. The longitudinally-vibrating cylindrical resonators used in the filter described in the parent Specification, are replaced by resonators of parallelepipedal shape. The resonators may be in the form of blocks 1, Fig. 1, coupled by wires 3 or the whole system, including resonators 12 and couplers 20, 21, Fig. 5, may be stamped out of a metal lamina. The couplers vibrate in a flexural mode. The degree of coupling is determined by the distance of the points of attachment of the couplers from the centres of the resonators, being a maximum when the couplers are attached, as in Fig. 1, to the extremities of the resonators where the vibrational amplitude is greatest. The coupling wires 3 are attached by welding and may consist of several short lengths or may run the whole length of the filter being connected, where necessary, to end supports. In constructions where the couplers, e.g. 13, Fig. 3a, are at one or both extremities of the (laminar) resonators, the edge or edges of the resonators and the couplers may lie in planes at rightangles to the main plane of the filter.
GB647261A 1960-03-01 1961-02-22 Improvements in or relating to high frequency electromechanical filters Expired GB959462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0017952 1960-03-01

Publications (1)

Publication Number Publication Date
GB959462A true GB959462A (en) 1964-06-03

Family

ID=7548773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB647261A Expired GB959462A (en) 1960-03-01 1961-02-22 Improvements in or relating to high frequency electromechanical filters

Country Status (2)

Country Link
DE (1) DE1416791A1 (en)
GB (1) GB959462A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187458A (en) * 1989-09-21 1993-02-16 Nihon Musen Kabushiki Kaisha Composite longitudinal vibration mechanical filter having central frequency deviation elimination means and method of manufacturing same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320004A1 (en) * 1975-07-31 1977-02-25 Lignes Telegraph Telephon BAND-PASS MECHANICAL FILTER FOR HIGH FREQUENCIES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187458A (en) * 1989-09-21 1993-02-16 Nihon Musen Kabushiki Kaisha Composite longitudinal vibration mechanical filter having central frequency deviation elimination means and method of manufacturing same
US5528806A (en) * 1989-09-21 1996-06-25 Nihon Musen Kabushiki Kaisha Tunable composite longitudinal vibration mechanical filter manufacturing method
US5740595A (en) * 1989-09-21 1998-04-21 Nihon Musen Kabushiki Kaisha Composite longitudinal vibration mechanical filter's method of manufacturing including undesired vibration absorber
US5751200A (en) * 1989-09-21 1998-05-12 Nihon Musen Kabushiki Kaisha Composite longitudinal vibration mechanical filter having undesired vibration absorber

Also Published As

Publication number Publication date
DE1416791A1 (en) 1968-10-03

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