CA2003757A1 - Band pass filter - Google Patents

Band pass filter

Info

Publication number
CA2003757A1
CA2003757A1 CA2003757A CA2003757A CA2003757A1 CA 2003757 A1 CA2003757 A1 CA 2003757A1 CA 2003757 A CA2003757 A CA 2003757A CA 2003757 A CA2003757 A CA 2003757A CA 2003757 A1 CA2003757 A1 CA 2003757A1
Authority
CA
Canada
Prior art keywords
pass filter
band pass
variable capacity
capacity elements
apex
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.)
Granted
Application number
CA2003757A
Other languages
French (fr)
Other versions
CA2003757C (en
Inventor
Fumihiko Kobayashi
Isamu Umino
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of CA2003757A1 publication Critical patent/CA2003757A1/en
Application granted granted Critical
Publication of CA2003757C publication Critical patent/CA2003757C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20336—Comb or interdigital filters
    • 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
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20354—Non-comb or non-interdigital filters
    • H01P1/20381—Special shape resonators

Abstract

BAND PASS FILTER
ABSTRACT OF THE DISCLOSURE

A band pass filter is comprised of one or more filter units each having a V-shaped microwave strip line provided with two variable capacity elements at its two open ends and a high frequency elimination element connected to the apex thereof through which a control voltage for the variable capacity elements is applied.
CA002003757A 1988-11-28 1989-11-23 Band pass filter Expired - Fee Related CA2003757C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63-301247 1988-11-28
JP63301247A JPH02146801A (en) 1988-11-28 1988-11-28 Band pass filter whose center frequency is variable

Publications (2)

Publication Number Publication Date
CA2003757A1 true CA2003757A1 (en) 1990-05-28
CA2003757C CA2003757C (en) 1994-06-21

Family

ID=17894543

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002003757A Expired - Fee Related CA2003757C (en) 1988-11-28 1989-11-23 Band pass filter

Country Status (5)

Country Link
US (1) US5021757A (en)
EP (1) EP0371446B1 (en)
JP (1) JPH02146801A (en)
CA (1) CA2003757C (en)
DE (1) DE68920971D1 (en)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5231349A (en) * 1988-05-20 1993-07-27 The Board Of Trustees Of The Leland Stanford Junior University Millimeter-wave active probe system
DE3835480A1 (en) * 1988-10-18 1990-04-19 Fraunhofer Ges Forschung HIGH FREQUENCY BAND PASS FILTER
JPH0349301A (en) * 1989-07-17 1991-03-04 Nec Corp Band pass filter
FR2659509B1 (en) * 1990-03-09 1994-07-29 Tekelec Airtronic Sa DIELECTRIC RESONATOR WITH MICROWAVE METAL TAPES AND DEVICE USING SUCH A RESONATOR.
GB2246670B (en) * 1990-08-03 1995-04-12 Mohammad Reza Moazzam Microstrip coupled lines filters with improved performance
FR2667999B1 (en) * 1990-10-10 1996-11-22 Alcatel Espace SLOPE CORRECTION MICROWAVE DEVICE, ESPECIALLY IN THE SPACE AREA.
US5138288A (en) * 1991-03-27 1992-08-11 Motorola, Inc. Micro strip filter having a varactor coupled between two microstrip line resonators
US5164690A (en) * 1991-06-24 1992-11-17 Motorola, Inc. Multi-pole split ring resonator bandpass filter
US5241291A (en) * 1991-07-05 1993-08-31 Motorola, Inc. Transmission line filter having a varactor for tuning a transmission zero
US5291161A (en) * 1991-07-22 1994-03-01 Matsushita Electric Industrial Co., Ltd. Microwave band-pass filter having frequency characteristic of insertion loss steeply increasing on one outside of pass-band
US5334961A (en) * 1991-08-12 1994-08-02 Matsushita Electric Industrial Co., Ltd. Strip-line type bandpass filter
US5280256A (en) * 1991-08-23 1994-01-18 The United States Of America As Represented By The Secretary Of The Army Limiting filter
US5392011A (en) * 1992-11-20 1995-02-21 Motorola, Inc. Tunable filter having capacitively coupled tuning elements
FI94298C (en) * 1993-03-03 1995-08-10 Lk Products Oy Method and connection for changing the filter type
ES2091713B1 (en) * 1994-02-15 1998-03-01 Follente Emilio Diez NETWORK OF FILTER OF PASSAGE OF FREQUENCY BANDS BY EFFECT OF THE INDUCTION OF REVERSE CURRENTS IN SEGMENTS OF PRINTED LINES.
KR0164410B1 (en) * 1995-07-21 1999-03-20 김광호 Strip line filter with switching function
JPH09162766A (en) * 1995-12-04 1997-06-20 Alps Electric Co Ltd Satellite broadcasting reception tuner
US5734307A (en) * 1996-04-04 1998-03-31 Ericsson Inc. Distributed device for differential circuit
CA2197253C (en) * 1997-02-11 1998-11-17 Com Dev Limited Planar dual mode filters and a method of construction thereof
WO1999027647A2 (en) * 1997-11-26 1999-06-03 Superconducting Core Technolgies, Inc. Symmetrical biasing architecture for tunable resonators
JP3633280B2 (en) * 1998-05-29 2005-03-30 松下電器産業株式会社 Half-wave resonator type high frequency filter
US6525630B1 (en) * 1999-11-04 2003-02-25 Paratek Microwave, Inc. Microstrip tunable filters tuned by dielectric varactors
US6252476B1 (en) * 2000-04-19 2001-06-26 Rockwell Collins, Inc. Microstrip resonators and coupled line bandpass filters using same
WO2002041441A1 (en) * 2000-11-14 2002-05-23 Paratek Microwave, Inc. Hybrid resonator microstrip line filters
JP2004104588A (en) * 2002-09-11 2004-04-02 Alps Electric Co Ltd Bandpass filter
FR2847080B1 (en) * 2002-11-08 2005-01-14 Thales Sa BROADBAND MICPERFREQUENCY BANDWIDTH FILTER
CN101361219B (en) 2006-09-28 2012-05-30 株式会社村田制作所 Dielectric filter, chip element, and chip element manufacturing method
US20100295634A1 (en) * 2009-05-20 2010-11-25 Tamrat Akale Tunable bandpass filter
TWI556502B (en) * 2010-10-26 2016-11-01 南洋理工大學 Multiple-mode filter for radio frequency integrated circuits
FR2971651A1 (en) * 2011-02-14 2012-08-17 Rockwell Collins France Variable frequency band-pass filter, has coupled conducting lines connected to terminal of variable capacitance element and resistor, respectively, where lines are provided on surface of insulator or sandwiched in layer of insulator
RU2528148C1 (en) * 2013-05-15 2014-09-10 Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" Bandpass microwave filter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2540294B1 (en) * 1983-01-31 1985-10-04 Thomson Csf MICROWAVE FILTER WITH LINEAR RESONATORS
US4623856A (en) * 1984-06-11 1986-11-18 Motorola, Inc. Incrementally tuned RF filter having pin diode switched lines
SU1224863A1 (en) * 1984-07-20 1986-04-15 Ленинградский Электротехнический Институт Связи Им.Проф.М.А.Бонч-Бруевича Strip band-pass filter
JPS61128602A (en) * 1984-11-28 1986-06-16 Pioneer Answerphone Mfg Corp Microwave filter
SU1309125A1 (en) * 1985-12-25 1987-05-07 Московский институт электронной техники Microstrip filter
FR2613538A1 (en) * 1987-03-31 1988-10-07 Thomson Csf Microwave filter
FR2613557A1 (en) * 1987-03-31 1988-10-07 Thomson Csf FILTER COMPRISING CONSTANT DISTRIBUTED ELEMENTS ASSOCIATING TWO TYPES OF COUPLING
JP2542619B2 (en) * 1987-06-19 1996-10-09 マツダ株式会社 Engine valve gear

Also Published As

Publication number Publication date
DE68920971D1 (en) 1995-03-16
EP0371446A3 (en) 1990-11-28
EP0371446B1 (en) 1995-02-01
CA2003757C (en) 1994-06-21
JPH0582081B2 (en) 1993-11-17
US5021757A (en) 1991-06-04
EP0371446A2 (en) 1990-06-06
JPH02146801A (en) 1990-06-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20051123