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FR2648641B2 - PASSIVE BAND PASS FILTER - Google Patents

PASSIVE BAND PASS FILTER

Info

Publication number
FR2648641B2
FR2648641B2 FR898908017A FR8908017A FR2648641B2 FR 2648641 B2 FR2648641 B2 FR 2648641B2 FR 898908017 A FR898908017 A FR 898908017A FR 8908017 A FR8908017 A FR 8908017A FR 2648641 B2 FR2648641 B2 FR 2648641B2
Authority
FR
France
Prior art keywords
filter
microstrips
input
impedance
pass 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 - Lifetime
Application number
FR898908017A
Other languages
French (fr)
Other versions
FR2648641A2 (en
Inventor
Henri Budan
Alain Grosjean
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.)
Thomson Hybrides
Original Assignee
Thomson Hybrides
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 FR8815664A external-priority patent/FR2639776B1/en
Application filed by Thomson Hybrides filed Critical Thomson Hybrides
Priority to FR898908017A priority Critical patent/FR2648641B2/en
Priority to DE68915408T priority patent/DE68915408T2/en
Priority to EP89403257A priority patent/EP0373028B1/en
Priority to AT89403257T priority patent/ATE105976T1/en
Priority to FI895714A priority patent/FI895714A0/en
Priority to CA002004184A priority patent/CA2004184A1/en
Publication of FR2648641A2 publication Critical patent/FR2648641A2/en
Publication of FR2648641B2 publication Critical patent/FR2648641B2/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Landscapes

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

Abstract

The invention relates to a passive band-pass filter constructed by means of microstrips on a dielectric substrate (4). This filter is composed of at least three microstrips (6,7,8), which are parallel to one another and one end of which is grounded (5). At least two microstrips (6,8) which are not adjacent are coupled by a coupling impedance Z (12). The distances x1, x2, x3, x4 of fixings on the microstrips of the input (10), coupling impedance Z (12) and output (11) regulate the impedances and the characteristics of the filter. A first improvement permits the narrowing of the pass band, by means of a high impedance (17) in parallel on the input (E) of the filter. A second impedance (18), in series on the input, corrects the input impedance modification. A second improvement consists in folding the filter back on itself, in order to reduce its space requirement. Continuity of the microstrip lines (6,7,8) is ensured by metallised coatings (20) on the flanks of the substrate (4), and jumper links (21) provide the channels for access to the filter and its fixing means.
FR898908017A 1988-11-30 1989-06-16 PASSIVE BAND PASS FILTER Expired - Lifetime FR2648641B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR898908017A FR2648641B2 (en) 1988-11-30 1989-06-16 PASSIVE BAND PASS FILTER
DE68915408T DE68915408T2 (en) 1988-11-30 1989-11-24 Passive bandpass filter.
EP89403257A EP0373028B1 (en) 1988-11-30 1989-11-24 Passive band-pass filter
AT89403257T ATE105976T1 (en) 1988-11-30 1989-11-24 PASSIVE BANDPASS FILTER.
FI895714A FI895714A0 (en) 1988-11-30 1989-11-29 PASSIVT BANDPASSFILTER.
CA002004184A CA2004184A1 (en) 1988-11-30 1989-11-29 Band-pass passive filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815664A FR2639776B1 (en) 1988-11-30 1988-11-30 PASSIVE BAND PASS FILTER
FR898908017A FR2648641B2 (en) 1988-11-30 1989-06-16 PASSIVE BAND PASS FILTER

Publications (2)

Publication Number Publication Date
FR2648641A2 FR2648641A2 (en) 1990-12-21
FR2648641B2 true FR2648641B2 (en) 1994-09-09

Family

ID=26227020

Family Applications (1)

Application Number Title Priority Date Filing Date
FR898908017A Expired - Lifetime FR2648641B2 (en) 1988-11-30 1989-06-16 PASSIVE BAND PASS FILTER

Country Status (6)

Country Link
EP (1) EP0373028B1 (en)
AT (1) ATE105976T1 (en)
CA (1) CA2004184A1 (en)
DE (1) DE68915408T2 (en)
FI (1) FI895714A0 (en)
FR (1) FR2648641B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2669476A1 (en) * 1990-11-21 1992-05-22 Valtronic France PASSIVE BAND PASS FILTER.
DE19652799C2 (en) * 1996-12-18 1999-05-20 Siemens Ag Microwave filter
ES2143964B1 (en) * 1998-09-15 2000-12-01 Univ Catalunya Politecnica DUAL DIPLEXOR FOR CELL PHONE GSM AND DCS.
KR100392682B1 (en) * 2001-02-26 2003-07-28 삼성전자주식회사 Radio filter of combline structure with frequency cut off circuit and method
US10862185B2 (en) 2017-12-01 2020-12-08 Semiconductor Components Industries, Llc Integrated circuit with capacitor in different layer than transmission line

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1906059A1 (en) * 1969-02-07 1970-08-13 Licentia Gmbh Comb filter
JPS49119170A (en) * 1973-03-19 1974-11-14
DE2407313A1 (en) * 1974-02-15 1975-08-21 Kathrein Werke Kg Multi-module cavity resonator assembly - rectangular cavity resonators have one open wall and one matching wall held together by threaded rods
US4253073A (en) * 1978-08-17 1981-02-24 Communications Satellite Corporation Single ground plane interdigital band-pass filter apparatus and method
US4706050A (en) * 1984-09-22 1987-11-10 Smiths Industries Public Limited Company Microstrip devices
FR2578104B1 (en) * 1985-02-27 1987-03-20 Alcatel Thomson Faisceaux BAND PASS FILTER FOR MICROWAVE
US4740765A (en) * 1985-09-30 1988-04-26 Murata Manufacturing Co., Ltd. Dielectric filter
JPS62260401A (en) * 1986-05-02 1987-11-12 Murata Mfg Co Ltd Strip line filter
FR2613557A1 (en) * 1987-03-31 1988-10-07 Thomson Csf FILTER COMPRISING CONSTANT DISTRIBUTED ELEMENTS ASSOCIATING TWO TYPES OF COUPLING

Also Published As

Publication number Publication date
FI895714A0 (en) 1989-11-29
EP0373028A1 (en) 1990-06-13
FR2648641A2 (en) 1990-12-21
DE68915408D1 (en) 1994-06-23
EP0373028B1 (en) 1994-05-18
DE68915408T2 (en) 1994-09-08
CA2004184A1 (en) 1990-05-31
ATE105976T1 (en) 1994-06-15

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