EP0075498A1 - Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren - Google Patents

Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren Download PDF

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Publication number
EP0075498A1
EP0075498A1 EP82401575A EP82401575A EP0075498A1 EP 0075498 A1 EP0075498 A1 EP 0075498A1 EP 82401575 A EP82401575 A EP 82401575A EP 82401575 A EP82401575 A EP 82401575A EP 0075498 A1 EP0075498 A1 EP 0075498A1
Authority
EP
European Patent Office
Prior art keywords
slot
cavities
guide
coupling
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.)
Granted
Application number
EP82401575A
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English (en)
French (fr)
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EP0075498B1 (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
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0075498A1 publication Critical patent/EP0075498A1/de
Application granted granted Critical
Publication of EP0075498B1 publication Critical patent/EP0075498B1/de
Expired legal-status Critical Current

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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
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Definitions

  • the present invention relates to band pass type cavity filters.
  • these filters are obtained by a series mounting of resonant cavities each tuned by a movable plunger (screw), the adjacent cavities being coupled together by irises or by rod curtains.
  • the coupling coefficient existing between two adjacent cavities is defined by the opening of the iris or the spacing between the rod curtains according to the technology used and can be adjusted by means of a coupling screw which modifies the susceptance presented by the iris or the curtain of stems.
  • Such filters have a symmetrical amplitude / frequency response, of the Chebyshev type or of the Butterworth type.
  • the object of the present invention is to avoid the aforementioned drawbacks.
  • the filter shown in FIG. 1 is a filter of the bandpass type, produced in a waveguide of rectangular section, 1.
  • the incident signal enters through an access E located at one end 3 of the guide and exits through an access S located at the other end 4 of the guide.
  • the filter comprises a set of 6 cavities CI to C6 arranged in series in the waveguide which is straight.
  • These cavities which are mounted in series, are electrically coupled by means of the irises 12 to 16. These irises are all aligned and their dimensions are determined so that they each have a given susceptibility to the incoming electromagnetic wave. . This susceptance defines the value of the coupling coefficient between each cavity.
  • Screws ql to q7, emerging from the waveguide, are respectively screwed through the coupling plates Vl to V7 to open into the irises II to 17; by driving them into the irises, the screws make it possible to adjust the coupling coefficient by slightly modifying the susceptance of the irises.
  • a slot, L In this lower face 2, represented in FIG. 2, is cut a slot, L, the length of which is determined by the distance which separates the cavities to be coupled in order to obtain a pseudo-elliptical response.
  • This slot L which goes from the cavity C2 to the cavity C5 is arranged parallel to the longitudinal edges of the guide and its ends are located respectively at the middle of the cavities C2 and C5 in order to maintain the symmetry of the response and to obtain a good performance, because the slot L behaves like a slot line or an antenna and allows part of the energy to pass directly from the cavity C2 to the cavity C5.
  • the ends of the slot have an enlarged part in the shape of T, E and E ', so as to amplify this phenomenon. Indeed, the widened slot ends make it possible to strongly couple the cavities C2 and C5 while there is practically no transfer of energy between the cavities C3 and C4 and the slot L due to the small width of the slot where it cuts the bottom of these cavities.
  • This embodiment is improved by adding two small antennas A, A ', which radiate respectively inside the cavities C2 and C5.
  • Each antenna is constituted by a conducting wire, one of the ends of which is electrically connected to one end of the slot; A is connected to E and A 'is connected to E'.
  • the housing 5 of parallelepiped shape, shown in section in FIG. 3, is integral with the guide by its ends 8 and 9 which are welded respectively to the ends 3 and 4 of the guide.
  • the wall of the housing 5 opposite the slot L is crossed by a screw, 6, accessible from the outside of the filter to allow frequency adjustment.
  • a screw, 6, accessible from the outside of the filter to allow frequency adjustment.
  • this screw, 6, is provided at its end with a plate 7 of dimension greater than that of the end of the screw 6, the screw 6 is screwed onto the housing 5 facing the slot L.
  • the insertion of the screw 6 deforms the electric field lines which are established around the slot L, which makes it possible to modify the coupling M 2 , 5 produced by the slot L.
  • the screw 6 makes it possible to increase or decrease the value of the coupling produced, which has the consequence of varying the frequency of the two weakening peaks obtained by the coupling of the cavities C2 and C5.
  • This frequency adjustment increases or decreases the value of the slopes of the filter response curve.
  • the closer the end of the screw 6 to the slot L the weaker the coupling and therefore the more the infinite weakening point moves away from the central frequency and the more the slopes become flat.
  • the further the screw is from the slot the stronger the coupling and therefore the more the weakening point approaches the center frequency and the more the slopes stiffen.
  • the slot makes it possible to correct the out-of-band response of the filter without significantly modifying the characteristics in the bandwidth.
  • a six-pole filter that is to say with six cavities
  • a slot coupling to obtain the same steepness for the amplitude / frequency response curve, as with an eight-pole filter.
  • the coupling can be carried out with only one slot, that is to say without the antennas and without the housing or else with the slot and the antennas or the slot and the housing.
  • the screw 6 is not essential; the value of the coupling then results, for a given slot, from the choice of the distance between the slot and the wall of the housing opposite the slot.

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EP19820401575 1981-09-04 1982-08-24 Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren Expired EP0075498B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8116873A FR2512593A1 (fr) 1981-09-04 1981-09-04 Filtre en guide d'onde
FR8116873 1981-09-04

Publications (2)

Publication Number Publication Date
EP0075498A1 true EP0075498A1 (de) 1983-03-30
EP0075498B1 EP0075498B1 (de) 1985-10-16

Family

ID=9261913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820401575 Expired EP0075498B1 (de) 1981-09-04 1982-08-24 Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren

Country Status (3)

Country Link
EP (1) EP0075498B1 (de)
DE (1) DE3266952D1 (de)
FR (1) FR2512593A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5534881A (en) * 1994-08-31 1996-07-09 Hughes Aircraft Company Microwave filter assembly having a nonsymmetrical waveguide and an antenna
FR2742262A1 (fr) * 1995-12-12 1997-06-13 Alcatel Telspace Filtre pseudo-elliptique dans le domaine millimetrique realise en technologie guide d'ondes
EP0871235A3 (de) * 1997-04-11 1999-03-24 Alcatel Mikrowellenfilter mit Kopplungselementen
EP0954048A3 (de) * 1998-04-28 2000-05-24 Robert Bosch Gmbh Bandpass-Filter
WO2002027449A3 (en) * 2000-09-25 2003-02-27 Intel Corp Method and apparatus for maintaining the temperature of a microprocessor using a firmware assisted interrupt mechanism
CN108832242A (zh) * 2018-06-07 2018-11-16 中国电子科技集团公司第五十五研究所 小型化w波段mems缝隙波导带通滤波器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113036364A (zh) * 2019-12-25 2021-06-25 深圳市大富科技股份有限公司 一种滤波器及通信设备
US11646477B2 (en) * 2021-03-03 2023-05-09 Meta Platforms, Inc. Waveguide cross-coupling filter with multiple parallel cavities

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697209A (en) * 1951-07-13 1954-12-14 Itt Tunable band pass filter
US2773244A (en) * 1952-08-02 1956-12-04 Itt Band pass filter
DE1221737B (de) * 1955-06-24 1966-07-28 Marconi Co Ltd Im Zuge einer Hohlleitung eingefuegte, als Bandpass oder Bandsperre ausgebildete Anordnung fuer sehr kurze elektromagnetische Wellen
DE3041625A1 (de) * 1980-11-05 1982-06-09 Standard Elektrik Lorenz Ag, 7000 Stuttgart Mikrowellenfilter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1199780A (en) * 1967-07-13 1970-07-22 Gen Electric & English Electri Improvements in or relating to Waveguide Filters
JPS5227244A (en) * 1975-08-26 1977-03-01 Nec Corp Microwave polarized bandpass filter
JPS52100955A (en) * 1976-02-20 1977-08-24 Nec Corp Microwave band-pass filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697209A (en) * 1951-07-13 1954-12-14 Itt Tunable band pass filter
US2773244A (en) * 1952-08-02 1956-12-04 Itt Band pass filter
DE1221737B (de) * 1955-06-24 1966-07-28 Marconi Co Ltd Im Zuge einer Hohlleitung eingefuegte, als Bandpass oder Bandsperre ausgebildete Anordnung fuer sehr kurze elektromagnetische Wellen
DE3041625A1 (de) * 1980-11-05 1982-06-09 Standard Elektrik Lorenz Ag, 7000 Stuttgart Mikrowellenfilter

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. MTT-18, no. 6, juin 1970, pages 308-313, New York (USA); *
PATENTS ABSTRACTS OF JAPAN, vol. 1, no. 156, 13 décembre 1977, page 8545 E77, & JP - A - 52 100 955 (NIPPON DENKI K.K., OSAMU KASUGA) (24-08-1977) *
PATENTS ABSTRACTS OF JAPAN, vol. 1, no. 92, 25 août 1977, page 2429 E77, & JP - A - 52 27 244 (NIPPON DENKI K.K. OSAMU KASUGA) (01-03-1977) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5534881A (en) * 1994-08-31 1996-07-09 Hughes Aircraft Company Microwave filter assembly having a nonsymmetrical waveguide and an antenna
FR2742262A1 (fr) * 1995-12-12 1997-06-13 Alcatel Telspace Filtre pseudo-elliptique dans le domaine millimetrique realise en technologie guide d'ondes
EP0779672A1 (de) * 1995-12-12 1997-06-18 Alcatel Telspace In Wellenleitertechnologie ausgeführtes pseudoelliptisches Filter für den Millimeterbereich
US5801606A (en) * 1995-12-12 1998-09-01 Alcatel Telspace Pseudo-elliptical filter for the millimeter band using waveguide technology
EP0871235A3 (de) * 1997-04-11 1999-03-24 Alcatel Mikrowellenfilter mit Kopplungselementen
EP0954048A3 (de) * 1998-04-28 2000-05-24 Robert Bosch Gmbh Bandpass-Filter
WO2002027449A3 (en) * 2000-09-25 2003-02-27 Intel Corp Method and apparatus for maintaining the temperature of a microprocessor using a firmware assisted interrupt mechanism
GB2383873A (en) * 2000-09-25 2003-07-09 Intel Corp Method and apparatus for maintaining the temperature of a microprocessor using a firmware assisted interrupt mechanism
GB2383873B (en) * 2000-09-25 2005-02-02 Intel Corp Method and apparatus for maintaining the temperature of a microprocessor using a firmware assisted interrupt mechanism
US7263567B1 (en) 2000-09-25 2007-08-28 Intel Corporation Method and apparatus for lowering the die temperature of a microprocessor and maintaining the temperature below the die burn out
CN108832242A (zh) * 2018-06-07 2018-11-16 中国电子科技集团公司第五十五研究所 小型化w波段mems缝隙波导带通滤波器
CN108832242B (zh) * 2018-06-07 2023-08-22 中国电子科技集团公司第五十五研究所 小型化w波段mems缝隙波导带通滤波器

Also Published As

Publication number Publication date
FR2512593B1 (de) 1985-02-01
EP0075498B1 (de) 1985-10-16
DE3266952D1 (en) 1985-11-21
FR2512593A1 (fr) 1983-03-11

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