EP0069651B1 - Resonatorenfilter mit einem einstellbaren Dämpfungspol - Google Patents

Resonatorenfilter mit einem einstellbaren Dämpfungspol Download PDF

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Publication number
EP0069651B1
EP0069651B1 EP19820401205 EP82401205A EP0069651B1 EP 0069651 B1 EP0069651 B1 EP 0069651B1 EP 19820401205 EP19820401205 EP 19820401205 EP 82401205 A EP82401205 A EP 82401205A EP 0069651 B1 EP0069651 B1 EP 0069651B1
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EP
European Patent Office
Prior art keywords
resonators
plate
filter
separated
coupled
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
EP19820401205
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English (en)
French (fr)
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EP0069651A1 (de
Inventor
Marie-Christine Henriot
Patrick Janer
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.)
Thales SA
Original Assignee
Thomson CSF SA
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Publication date
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    • 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

Definitions

  • the present invention relates to microwave filters comprising resonators arranged in line between the input and the output of the filter and in which two nonadjacent resonators are coupled by a conductive plate of elongated shape, having its two ends situated, respectively, at the vicinity of these two nonadjacent resonators and having a curvature whose concavity is turned towards the resonators situated between the two nonadjacent resonators.
  • Such filters are known for example from German patent application 2218277.
  • the position of the conductive plate is determined during the production of the filter and can only be modified subsequently by opening the filter housing and by changing the thickness of insulating parts which determine the position of the conductive plate in relation to the resonators.
  • the present invention aims to provide a filter where the adjustment of the position of the metal plate does not require the opening of the housing. This is mainly achieved by using an elastic conductive plate and an insulating screw which passes through the filter housing and comes to bear on the plate.
  • a microwave filter comprising n resonators (n integer at least equal to 3) arranged in line between the input and the output of the filter and in which at least two non-adjacent resonators, which will be said to be separate coupled resonators , are coupled by an elongated conductive plate, having its two ends located, respectively, in the vicinity of two separate-coupled resonators and having a curvature whose concavity is turned towards those of the n-2 other resonators located between the two separate resonators -coupled, is characterized in that the plate is an elastic plate with a fixed point and one end of which is free and in that an insulating adjustment screw passing through the wall of the filter housing allows adjustment the position of the free end of the plate relative to one of the separate-coupled resonators by pressing on the plate.
  • the filter according to FIG. 1 comprises a metal cavity, 1, in which are placed four resonators, R, to R 4 , formed of line sections.
  • This filter is of the comb filter type due to the arrangement of its resonators.
  • the cavity 1 is a metal case comprising a bottom 2 secured to four vertical walls, and a cover 5; the resonators are tubular and are parallel to each other.
  • the number of resonators makes it possible to determine the number of poles of the amplitude / frequency transfer function.
  • This filter additionally includes a ZE input impedance adapter and a ZS output impedance adapter.
  • Each resonator is fixed by a first end to a vertical side, 3, of the housing, and is coupled, at its second end, to the opposite vertical side, 4, by a capacitive coupling, C, to C 4 .
  • the capacitive couplings are produced by conductive threaded rods which each partially penetrate inside each resonator without touching them on the side where the potential is not zero, that is to say by the end opposite to the side 3 of the housing. .
  • Each rod is accessible from outside the housing and can be screwed or unscrewed to obtain the tuning frequency of each resonator. The rods therefore make it possible to vary the corresponding tuning capacity.
  • the filter input E is taken on the vertical side 3.
  • the input impedance adapter ZE is a section of conductive line placed upstream of the first resonator, R l . This adapter ZE is connected to the input E by one of its ends and is connected to the ground by the other end.
  • the output S of the filter is taken on the vertical side 3.
  • the adapter ZS is a section of conductive line placed downstream of the resonator R 4 . This adapter ZS is connected to the output S by one of its ends and is connected to the ground by the other end.
  • the filtering frequency range of such a filter can range from 500 MHz to a few GHz.
  • the central frequency Fc was of the order of 825 MHz and the bandwidth AF of the order of 10% of the central frequency.
  • an amplitude / frequency response according to Tchebycheff was chosen which therefore have a minimum of ripple in the passband.
  • the resonators have primary couplings between them. These primary couplings between adjacent resonators are generally capacitive and a function of the distance separating the two adjacent resonators. This distance was chosen so as to obtain the desired filtering function.
  • the filter of FIGS. 1 and 2 also includes a conductive plate 6 which is used to create a secondary coupling between the two non-adjacent resonators R, and R 4 .
  • the plate 6 is an elongated plate having a certain elasticity. As shown in Figures 1 and 2 this plate is integral with the resonator R l . This plate is placed at a distance D from the resonators R 2 R 3 sufficient for there to be practically no coupling with these resonators.
  • the ends 7 and 8 of the plate 6 are curved and have flat folds 9 and 10 opposite the resonators R and R 4 respectively .
  • One of the ends, 7, of the plate is made integral with the resonator R I by a weld, 20, between the flat fold 10 and this resonator.
  • the plate 6 is therefore electrically connected to the resonator R l .
  • the other end 8 of the plate 9 has its flat-fold located at a distance au4commun of the resonator R. ; the distance d is much less than the distance D.
  • the cover 5 is pierced with a threaded hole, 19a, which is located above the resonator R4 when the cover 5 is closed.
  • the threaded hole 19a passes through the cover 5 and allows the passage of an insulating screw 19.
  • the head of the screw 19 is located outside the filter, its body is screwed into the hole 19a and its end is in contact with the flat fold 9 of the plate. This contact is guided by means of a pivot 8a fixed to the flat fold 9, perpendicular to this flat fold and penetrating inside the screw 19 in a housing produced for this purpose.
  • the screw 19 therefore makes it possible, by screwing or unscrewing and thanks to the elasticity of the plate 6, to bring the flat fold 9 closer to or away from the plate 6 of the resonator R 4 and this in order to vary the secondary coupling produced between the resonator R I and the resonator R 4 ; it is thus possible to move the infinite weakening point, obtained by the secondary coupling, in a frequency band comprised between the cut-off frequency of the filter delimiting the useful band and a frequency greater than this cut-off frequency.
  • the present invention is not limited to the example described, this is how it is possible to produce, in the same filter, several secondary couplings between nonadjacent resonators in order to obtain several peaks of infinite attenuation and therefore to provide several adjustments by elastic plate and insulating screw.
  • the present invention applies to all microwave filters comprising more than two resonators arranged in a line, these resonators can be just as much line sections as dielectric resonators.

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

Claims (2)

1. Filter mit n Resonatoren (wobei n eine ganze Zahl und mindestens gleich 3 ist), die zwischen dem Eingang und dem Ausgang des Filters aufgereiht sind, wobei mindestens zwei nicht benachbarte Resonatoren, die gekoppelte und getrennte Resonatoren genannt werden, über eine längliche leitende Platte (6) gekoppelt sind, deren beide Enden (7, 8) je in der Nähe eines der beiden gekoppelten und getrennten Resonatoren (R1, R4) angeordnet sind, und die eine Krümmung aufweist, deren Konkavität denjenigen (R2, R3) der n-2 anderen Resonatoren zugewandt ist, die sich zwischen den beiden gekoppelten und getrennten Resonatoren befinden, dadurch gekennzeichnet, dass die Platte (6) eine biegsame Platte ist, von der ein Punkt fest ist und von der ein Ende frei ist, und dass eine isolierende Einstellschraube (19), die die Wand des Filtergehäuses durchdringt, die Regulierung der Position des freien Endes (8) der Platte in bezug auf einen (R4) der gekoppelten und getrennten Resonatoren dadurch ermöglicht, dass sie auf die Platte drückt.
2. Filter nach Anspruch 1, dadurch gekennzeichnet, dass die Platte (6) an ihrem anderen Ende mit einem (R1) der getrennten und gekoppelten Resonatoren (R1, R4) aufgrund einer Befestigungsvorrichtung (20) in Berührung steht.
EP19820401205 1981-07-07 1982-06-29 Resonatorenfilter mit einem einstellbaren Dämpfungspol Expired EP0069651B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8113321 1981-07-07
FR8113321A FR2509536A1 (fr) 1981-07-07 1981-07-07 Filtre hyperfrequence comportant des couplages entre troncons de ligne et des moyens de reglage

Publications (2)

Publication Number Publication Date
EP0069651A1 EP0069651A1 (de) 1983-01-12
EP0069651B1 true EP0069651B1 (de) 1986-01-08

Family

ID=9260286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820401205 Expired EP0069651B1 (de) 1981-07-07 1982-06-29 Resonatorenfilter mit einem einstellbaren Dämpfungspol

Country Status (4)

Country Link
EP (1) EP0069651B1 (de)
JP (1) JPS5816902U (de)
DE (1) DE3268387D1 (de)
FR (1) FR2509536A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3203633B1 (de) * 2013-09-27 2022-05-18 Intel Corporation Nicht-benachbarte multiresonator-kopplung

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3380549D1 (en) * 1982-05-10 1989-10-12 Oki Electric Ind Co Ltd A dielectric filter
EP0324512B1 (de) * 1982-05-10 1994-11-02 Oki Electric Industry Company, Limited Dielektrischer Filter
FR2613557A1 (fr) * 1987-03-31 1988-10-07 Thomson Csf Filtre comportant des elements a constantes reparties associant deux types de couplage
JPH0652842B2 (ja) * 1987-12-28 1994-07-06 沖電気工業株式会社 有極型誘電体フィルタ
FR2629276B1 (fr) * 1988-03-23 1991-06-07 Alcatel Thomson Faisceaux Dispositif hyperfrequence de reglage pour une transition guide d'onde-ligne planaire
FR2639776B1 (fr) * 1988-11-30 1994-07-22 Thomson Hybrides Filtre passif passe-bande
FI89429C (fi) * 1991-01-11 1993-09-27 Solitra Oy Duplex-filter
US6642814B2 (en) * 2001-12-17 2003-11-04 Alcatel, Radio Frequency Systems, Inc. System for cross coupling resonators
FI127061B (en) 2014-05-23 2017-10-31 Tongyu Tech Oy Radio frequency resonator tuning elements
CN110770970A (zh) * 2018-03-23 2020-02-07 深圳市大富科技股份有限公司 一种滤波器以及通信设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1070751B (de) * 1953-02-26
GB752142A (en) * 1953-05-20 1956-07-04 Radio Electr Soc Fr Improvements in or relating to band-pass filters for ultra-high frequencies
JPS4921458B1 (de) * 1963-10-29 1974-06-01
FR1526487A (fr) * 1966-06-08 1968-05-24 Marconi Co Ltd Filtres à micro-ondes à enveloppe conductrice
DE1918356A1 (de) * 1969-04-11 1970-10-15 Licentia Gmbh Mikrowellen-Kammfilter
DE2218277C3 (de) * 1972-04-15 1978-08-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellenfilter, bestehend aus zwischen parallelen Platten in Fortpflanzungsrichtung der Welle hintereinander angeordneten Resonatoren
JPS6011481B2 (ja) * 1976-12-10 1985-03-26 日本電気株式会社 マイクロ波有極型帯域通過ろ波器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3203633B1 (de) * 2013-09-27 2022-05-18 Intel Corporation Nicht-benachbarte multiresonator-kopplung

Also Published As

Publication number Publication date
DE3268387D1 (en) 1986-02-20
FR2509536B1 (de) 1984-11-30
FR2509536A1 (fr) 1983-01-14
JPS5816902U (ja) 1983-02-02
EP0069651A1 (de) 1983-01-12

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