EP0395888B1 - Iris de couplage - Google Patents

Iris de couplage Download PDF

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Publication number
EP0395888B1
EP0395888B1 EP90106107A EP90106107A EP0395888B1 EP 0395888 B1 EP0395888 B1 EP 0395888B1 EP 90106107 A EP90106107 A EP 90106107A EP 90106107 A EP90106107 A EP 90106107A EP 0395888 B1 EP0395888 B1 EP 0395888B1
Authority
EP
European Patent Office
Prior art keywords
coupling
openings
location
wave
wave mode
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
EP90106107A
Other languages
German (de)
English (en)
Other versions
EP0395888A3 (fr
EP0395888A2 (fr
Inventor
Uwe Dipl.-Ing. Rosenberg
Dieter Dipl.-Ing. Wolk
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.)
Bosch Telecom GmbH
Original Assignee
ANT Nachrichtentechnik GmbH
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 ANT Nachrichtentechnik GmbH filed Critical ANT Nachrichtentechnik GmbH
Publication of EP0395888A2 publication Critical patent/EP0395888A2/fr
Publication of EP0395888A3 publication Critical patent/EP0395888A3/fr
Application granted granted Critical
Publication of EP0395888B1 publication Critical patent/EP0395888B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion

Definitions

  • the present invention relates to a coupling aperture, which is arranged between two cavity resonators of a microwave filter and has at least two coupling openings, which are dimensioned and placed so that a coupling between the same wave types occurs in the two cavity resonators.
  • Such a coupling aperture is from IEEE Transactions on Microwave Theory and Techniques, Vol. MTT-35, No. 12, Dec. 1987, pp. 1143-1149.
  • the coupling openings are arranged in the coupling aperture in such a way that, if possible, only one single wave mode is coupled in the two cavity resonators separated from one another by the coupling aperture.
  • the coupling openings are placed according to the prior art in such a way that the wave mode not to be coupled has the lowest possible field strength there.
  • the invention is based on the object of specifying a coupling panel of the type mentioned in the the coupling openings are arranged so that the desired coupling is very strong, but any parasitic coupling is reduced as much as possible.
  • the implementation of the coupling aperture carried out according to the invention brings about a very strong coupling of a first wave mode existing in both adjacent cavity resonators and at the same time still a second wave mode also existing in both cavity resonators via several coupling openings.
  • parasitic coupling between non-similar wave modes is largely reduced.
  • coupling orifices have two coupling openings K1 and K2 of identical dimensions.
  • the locations for the coupling openings K1 and K2 are selected such that the magnetic field or a magnetic field component of the TE 11n wave mode existing in both adjacent cavity resonators at the coupling opening K1 is oriented in the same direction as with the coupling opening K2.
  • the magnetic field, or a magnetic field component, of the TM 01m wave mode existing in both cavity resonators is also oriented at least almost parallel to the field of the TE 11n wave mode.
  • the magnetic field or a magnetic field component of the TM 01m wave mode is aligned antiparallel to the magnetic field component of the TE 11n wave mode located there.
  • the magnetic field component of the TM 01m wave mode is oriented in opposite directions, but it has the same field strength there.
  • the coupling openings K1 and K2 have a greater extent in the direction of the magnetic fields or field tangents than transversely to them.
  • the coupling openings can also have a different shape, deviating from the slot shape shown in FIG. 2.
  • the coupling of the wave modes takes place via the magnetic field. With the appropriate position and shape of the coupling openings, coupling via the electric field can also be implemented.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Claims (4)

  1. Iris de couplage placé entre deux résonateurs à cavité d'un filtre pour micro-ondes et présentant au moins deux orifices de couplage qui sont dimensionnés et positionnés de manière qu'un couplage se produise entre deux types d'ondes identiques dans les deux résonateurs à cavité,
    caractérisé en ce que les orifices de couplage (K1, K2) sont agencés de manière que des couplages pour deux modes mutuellement indépendants se produisent à travers eux et que, à travers au moins l'un des orifices de couplage, s'effectue un couplage des deux modes et, à travers au moins l'un des autres orifices de couplage, s'effectue également un couplage de même grandeur, mais de sens contraire, si bien que, au total, ces deux couplages contraires s'annulent réciproquement.
  2. Iris de couplage selon la revendication 1, caractérisé en ce que deux orifices de couplage (K1, K2) sont agencés de manière qu'une composante de champ électrique ou magnétique d'un premier mode soit orienté dans la même direction à l'endroit d'un des deux orifices de couplage (K1, K2) qu'à l'endroit de l'autre orifice de couplage et que, en outre, une composante de champ électrique ou magnétique d'un second mode présente au moins à peu près la même intensité de champ à l'endroit d'un des deux orifices de couplage qu'à l'endroit de l'autre orifice de couplage, mais que cette composante de champ soit orientée suivant des directions contraires aux endroits des orifices de couplage (K1, K2).
  3. Iris de couplage selon la revendication 2, caractérisé en ce qu'un mode TE11n (n = 1, 2,...) et un mode TM01m (m = 0, 1, 2,...) existent dans les deux résonateurs à cavité séparés l'un de l'autre par l'iris de couplage (KB) et que les orifices de couplage (K1, K2) de l'iris (KB) se trouvent à des endroits où une composante de champ magnétique du mode TE11n est orientée dans la même direction et où une composante de champ magnétique du mode TM01m possède la même intensité de champ, mais est orientée suivant la direction contraire.
  4. Iris de couplage selon la revendication 2 ou 3, caractérisé en ce que les composantes de champ des deux modes sont orientées parallèlement à l'endroit d'un des deux orifices de couplage (K1, K2) et sont mutuellement antiparallèles à l'endroit de l'autre orifice de couplage, et que les orifices de couplages (K1, K2) possèdent une plus grande étendue dans la direction d'orientation des composantes de champ des deux modes que transversalement à cette direction.
EP90106107A 1989-04-29 1990-03-30 Iris de couplage Expired - Lifetime EP0395888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914246 1989-04-29
DE3914246 1989-04-29

Publications (3)

Publication Number Publication Date
EP0395888A2 EP0395888A2 (fr) 1990-11-07
EP0395888A3 EP0395888A3 (fr) 1991-09-25
EP0395888B1 true EP0395888B1 (fr) 1995-03-01

Family

ID=6379779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106107A Expired - Lifetime EP0395888B1 (fr) 1989-04-29 1990-03-30 Iris de couplage

Country Status (2)

Country Link
EP (1) EP0395888B1 (fr)
DE (1) DE59008563D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6459346B1 (en) * 2000-08-29 2002-10-01 Com Dev Limited Side-coupled microwave filter with circumferentially-spaced irises

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230481A (en) * 1959-09-30 1966-01-18 David J Lewis Method for segregating harmonic power in a waveguide system
US3715688A (en) * 1970-09-04 1973-02-06 Rca Corp Tm01 mode exciter and a multimode exciter using same
JPS5951762B2 (ja) * 1978-01-24 1984-12-15 三菱電機株式会社 共振空洞形帯域通過ろ波器
US4742317A (en) * 1986-05-23 1988-05-03 General Electric Company Mode coupler for monopulse antennas and the like

Also Published As

Publication number Publication date
EP0395888A3 (fr) 1991-09-25
EP0395888A2 (fr) 1990-11-07
DE59008563D1 (de) 1995-04-06

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