EP0350256A3 - Band elimination filter - Google Patents

Band elimination filter Download PDF

Info

Publication number
EP0350256A3
EP0350256A3 EP19890306771 EP89306771A EP0350256A3 EP 0350256 A3 EP0350256 A3 EP 0350256A3 EP 19890306771 EP19890306771 EP 19890306771 EP 89306771 A EP89306771 A EP 89306771A EP 0350256 A3 EP0350256 A3 EP 0350256A3
Authority
EP
European Patent Office
Prior art keywords
band elimination
elimination filter
filter circuit
inductor
capacitor
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Withdrawn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
EP19890306771
Other languages
German (de)
French (fr)
Other versions
EP0350256A2 (en
Inventor
Tadahiro C/O Murata Manufacturing Co. Ltd. Yorita
Yoshiki C/O Murata Manufacturing Co. Ltd. Yamada
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co 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
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of EP0350256A2 publication Critical patent/EP0350256A2/en
Publication of EP0350256A3 publication Critical patent/EP0350256A3/en
Withdrawn legal-status Critical Current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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Filters And Equalizers (AREA)

Abstract

A band elimination filter includes a filter circuit (10) which is formed by a dielectric resonator (11) exhibiting inductiveness at a frequency f₂ and a capacitor (12) connected in series with the dielectric resonator, and an input/output transmission line (13) which has an inductor (14) connected to the capacitor (12) of the filter circuit (10). Only the aforementioned filter circuit (10) is connected between an end portion of the inductor (14) and earthing means (15). In the band elimination filter having such structure, a signal attenuation amount is abruptly changed around the trap frequency f₂, to improve the passing characteristic.
EP19890306771 1988-07-04 1989-07-04 Band elimination filter Withdrawn EP0350256A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63166580A JPH0216802A (en) 1988-07-04 1988-07-04 Band elimination filter
JP166580/88 1988-07-04

Publications (2)

Publication Number Publication Date
EP0350256A2 EP0350256A2 (en) 1990-01-10
EP0350256A3 true EP0350256A3 (en) 1990-11-28

Family

ID=15833909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890306771 Withdrawn EP0350256A3 (en) 1988-07-04 1989-07-04 Band elimination filter

Country Status (4)

Country Link
EP (1) EP0350256A3 (en)
JP (1) JPH0216802A (en)
FI (1) FI893231A (en)
NO (1) NO892754L (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03181205A (en) * 1989-12-11 1991-08-07 Fuji Elelctrochem Co Ltd Dielectric filter
JPH03247001A (en) * 1990-02-23 1991-11-05 Fuji Elelctrochem Co Ltd Dielectric filter
JPH0824243B2 (en) * 1990-03-02 1996-03-06 富士通株式会社 Dielectric filter
CA2037262A1 (en) * 1990-03-02 1991-09-03 Hiroyuki Sogo Dielectric resonator and a filter using same
JPH03254202A (en) * 1990-03-02 1991-11-13 Fujitsu Ltd Dielectric resonator and filter using same
JPH0490602A (en) * 1990-08-03 1992-03-24 Fuji Elelctrochem Co Ltd Dielectric resonator and dielectric filter
GB2247125B (en) * 1990-08-16 1995-01-11 Technophone Ltd Tunable bandpass filter
JPH04103201A (en) * 1990-08-22 1992-04-06 Fuji Elelctrochem Co Ltd Dielectric band stop filter
JPH04196829A (en) * 1990-11-28 1992-07-16 Hitachi Ltd Branching filter device and mobile radio equipment using same
EP0519080B1 (en) * 1990-12-26 1997-03-19 Ube Industries, Ltd. Dielectric filter
US5293141A (en) * 1991-03-25 1994-03-08 Sanyo Electric Co., Ltd. Dielectric filter having external connection terminals on dielectric substrate and antenna duplexer using the same
JP2643634B2 (en) * 1991-04-10 1997-08-20 株式会社村田製作所 Dielectric coaxial resonator and dielectric filter
JPH054603U (en) * 1991-06-27 1993-01-22 京セラ株式会社 Band elimination filter
US5202654A (en) * 1991-07-22 1993-04-13 Motorola, Inc. Multi-stage monolithic ceramic bandstop filter with isolated filter stages
JPH05167309A (en) * 1991-12-11 1993-07-02 Fuji Elelctrochem Co Ltd Dielectric filter
JP2811382B2 (en) * 1991-12-11 1998-10-15 富士電気化学株式会社 Dielectric filter
JP2899210B2 (en) * 1994-05-20 1999-06-02 国際電気株式会社 Variable frequency band filter
KR20010052211A (en) * 1998-03-18 2001-06-25 윌리암 제이. 템블린 Narrow-band band-reject filter apparatus and method
US6529750B1 (en) 1998-04-03 2003-03-04 Conductus, Inc. Microstrip filter cross-coupling control apparatus and method
AU2001281167A1 (en) 2000-08-07 2002-02-18 Conductus, Inc. Varactor tuning for a narrow band filter
US7437187B1 (en) 2000-10-30 2008-10-14 Conductus, Inc. Superconductive filter with capacitive patches providing reduced cross-coupling
US7610072B2 (en) 2003-09-18 2009-10-27 Superconductor Technologies, Inc. Superconductive stripline filter utilizing one or more inter-resonator coupling members
GB2512032B (en) * 2013-01-31 2020-07-29 Clive Baty David Filter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1568141A (en) * 1920-08-13 1926-01-05 American Telephone & Telegraph Frequency selective circuits
US4703291A (en) * 1985-03-13 1987-10-27 Murata Manufacturing Co., Ltd. Dielectric filter for use in a microwave integrated circuit
US4730173A (en) * 1983-06-23 1988-03-08 Murata Manufacturing Co., Ltd. Asymmetrical trap comprising coaxial resonators, reactance elements, and transmission line elements
EP0312011A2 (en) * 1987-10-15 1989-04-19 Murata Manufacturing Co., Ltd. Dielectric filter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61105901A (en) * 1984-10-30 1986-05-24 Sumitomo Electric Ind Ltd Notch filter
JPS61191101A (en) * 1985-02-19 1986-08-25 Murata Mfg Co Ltd Filter
JPS61193501A (en) * 1985-02-21 1986-08-28 Murata Mfg Co Ltd Filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1568141A (en) * 1920-08-13 1926-01-05 American Telephone & Telegraph Frequency selective circuits
US4730173A (en) * 1983-06-23 1988-03-08 Murata Manufacturing Co., Ltd. Asymmetrical trap comprising coaxial resonators, reactance elements, and transmission line elements
US4703291A (en) * 1985-03-13 1987-10-27 Murata Manufacturing Co., Ltd. Dielectric filter for use in a microwave integrated circuit
EP0312011A2 (en) * 1987-10-15 1989-04-19 Murata Manufacturing Co., Ltd. Dielectric filter

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 285 (E-441)(2341) 27 September 1986; & JP-A-61 105 901 (SUMITOMO ELECTRIC IND LTD) 24 May 1986, *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 20 (E-472)(2467) 20 January 1987; & JP-A-61 191 101 (MURATA MFG CO LTD) 25 August 1986, *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 23 (E-473)(2470) 22 January 1987; & JP-A-61 193 501 (MURATA MFG CO LTD) 28 August 1986, *

Also Published As

Publication number Publication date
NO892754L (en) 1990-01-05
JPH0216802A (en) 1990-01-19
NO892754D0 (en) 1989-07-03
EP0350256A2 (en) 1990-01-10
FI893231A0 (en) 1989-07-03
FI893231A (en) 1990-01-05

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