EP0250857B1 - Filtre à micro-ondes - Google Patents

Filtre à micro-ondes Download PDF

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Publication number
EP0250857B1
EP0250857B1 EP87107533A EP87107533A EP0250857B1 EP 0250857 B1 EP0250857 B1 EP 0250857B1 EP 87107533 A EP87107533 A EP 87107533A EP 87107533 A EP87107533 A EP 87107533A EP 0250857 B1 EP0250857 B1 EP 0250857B1
Authority
EP
European Patent Office
Prior art keywords
mode
cavity
coupling
cavity resonator
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 - Lifetime
Application number
EP87107533A
Other languages
German (de)
English (en)
Other versions
EP0250857A2 (fr
EP0250857A3 (en
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 EP0250857A2 publication Critical patent/EP0250857A2/fr
Publication of EP0250857A3 publication Critical patent/EP0250857A3/de
Application granted granted Critical
Publication of EP0250857B1 publication Critical patent/EP0250857B1/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

Definitions

  • the present invention relates to a microwave filter, consisting of at least two cavity resonators, in each of which at least one TE or TM wave mode exists, with a coupling between the wave modes of both cavity resonators taking place via a coupling aperture present between two adjacent cavity resonators.
  • Such a microwave filter is known, for example, from DE-PS 21 22 337 or the IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. MIT-32, No. 11, Nov. 1984, pp. 1449-1454.
  • the resonance circuits of the microwave filters on which this is based are realized by TE and / or TM wave modes which resonate in the individual cavity resonators.
  • the characteristic of such a microwave filter depends on which orthogonally polarized wave modes exist in the individual cavity resonators and which of these wave modes are coupled to one another. Couplings between the wave modes existing in each individual cavity resonator and couplings between wave modes in different cavity resonators come into question. Cross-cavity resonance wave mode couplings take place via coupling apertures with coupling openings therein.
  • the invention is based on the object of specifying a microwave filter of the type mentioned at the outset which, compared to the prior art, offers further possibilities for realizing filter characteristics.
  • the microwave filter shown in FIG. 1 consists of two cylindrical cavity resonators HR1 and HR2, of which the first cavity resonator HR1 has an input E for coupling in a microwave signal and the second cavity resonator HR2 has an output A for coupling out a signal.
  • the various known possibilities of coupling and decoupling microwave signals will not be discussed in more detail here.
  • the direction of the E field lines of the TE11n wave mode shown in FIG. 2b corresponds to its direction of polarization.
  • Fig. 2a shows the TMO1p wave mode. Its E field lines run in the direction of wave propagation, the direction of polarization (see arrow R5) of this TMO1p wave mode.
  • each individual cavity resonator can be formed by discontinuity coupling elements, e.g. Tuning screws, which are embedded in the cavity wall in a known manner, are coupled.
  • Couplings of the wave modes of one cavity resonator HR1 with wave modes of the other cavity resonator HR2 take place via a coupling diaphragm KB arranged between the two adjacent cavity resonators.
  • a slot-shaped coupling opening K1 is arranged off-center in the coupling aperture KB. This coupling opening is located at a point where the magnetic field lines or components of the TE11n wave mode of the resonance circuit R1 in the first cavity HR1 and the magnetic field lines of the TMO1p wave mode of the resonance circuit R5 in the second cavity HR2 run parallel to one another. Thus, these two wave modes are coupled via the coupling opening K1.
  • the TE11n wave mode of the resonance circuit R1 of the first cavity resonator HR1 is also polarized with the same TE11n wave mode of the resonant circuit R4 coupled in the second cavity HR2.
  • a coupling between the TE11n wave mode of the resonance circuit R2 in the first cavity resonator HR1 and the TMO1p wave mode of the resonance circuit R5 and also the TE11n -Wave mode of the resonant circuit R3 in the second cavity HR2 can be effected.
  • a very simple coupling opening structure can be used to achieve a large number of couplings between differently designed or differently polarized wave modes of adjacent cavity resonators.
  • the choice of the dimensioning and the position of the coupling opening determine the frequency at which a wave mode coupling takes place and the degree of coupling.
  • the microwave filter consisted of only two cavity resonators.
  • filters can also be constructed from more than just two cavity resonators, with one (single-mode) two (dual-mode) or three wave modes (triple-mode) existing in each individual cavity resonator, which can be coupled to one another depending on the desired filter characteristic.

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  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (4)

  1. Filtre à micro-ondes constitué d'au moins deux résonateurs à cavité, dans chacun desquels existe au moins un mode de propagation d'ondes TE ou TM, filtre dans lequel un diaphragme coupleur prévu entre deux résonateurs à cavité voisins assure un couplage entre les modes des deux résonateurs, caractérisé en ce qu'un mode TE dans l'un des deux résonateurs à cavité (HR1, HR2) voisins est couplé à un mode TM dans l'autre résonateur à cavité.
  2. Filtre à micro-ondes selon la revendication 1, caractérisé en ce que le diaphragme coupleur (KB) présente une ouverture de couplage (K1, K2) à l'endroit où les lignes des champs magnétiques des modes TE et TM s'étendent à peu près parallèlement les unes par rapport aux autres dans le plan du diaphragme.
  3. Filtre à micro-ondes selon une des revendications précédentes, caractérisé en ce que, à travers l'ouverture de couplage (K1, K2) ménagée dans le diaphragme coupleur (KB), s'effectue également un couplage entre le mode TE dans un résonateur (HR1) et un mode TE existant à côté du mode TM dans l'autre résonateur (HR2) et ayant la même polarisation.
  4. Filtre à micro-ondes selon une des revendications précédentes, caractérisé en ce que deux modes TE (R1, R2) à polarisation orthogonale mutuelle existent dans l'un des deux résonateurs à cavité (HR1, HR2) et également deux modes TE (R3, R4) à polarisation orthogonale mutuelle et un mode TM (R5) à polarisation orthogonale par rapport à ces deux modes existent dans l'autre résonateur à cavité, que le premier mode TE (R1) d'un résonateur (HR1) est couplé à travers une première ouverture de couplage (K1) du diaphragme coupleur (KB) avec le mode TE (R4) ayant la même polarisation que lui et avec le mode TM (R5) de l'autre résonateur à cavité (HR2), et que, à travers une seconde ouverture de couplage (K2), le second mode TE (R2) du résonateur (HR1) mentionné en premier est couplé avec le mode TE (R3) de même polarisation que lui et avec le mode TM (R5) de l'autre résonateur (HR2).
EP87107533A 1986-06-25 1987-05-23 Filtre à micro-ondes Expired - Lifetime EP0250857B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3621299 1986-06-25
DE19863621299 DE3621299A1 (de) 1986-06-25 1986-06-25 Mikrowellenfilter

Publications (3)

Publication Number Publication Date
EP0250857A2 EP0250857A2 (fr) 1988-01-07
EP0250857A3 EP0250857A3 (en) 1988-12-07
EP0250857B1 true EP0250857B1 (fr) 1992-07-15

Family

ID=6303682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107533A Expired - Lifetime EP0250857B1 (fr) 1986-06-25 1987-05-23 Filtre à micro-ondes

Country Status (4)

Country Link
US (1) US4734665A (fr)
EP (1) EP0250857B1 (fr)
CA (1) CA1271532A (fr)
DE (2) DE3621299A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5012211A (en) * 1987-09-02 1991-04-30 Hughes Aircraft Company Low-loss wide-band microwave filter
FR2675952B1 (fr) * 1991-04-29 1993-10-22 Alcatel Telspace Filtre hyperfrequence a une ou plusieurs cavites resonnantes.
US5254963A (en) * 1991-09-25 1993-10-19 Comsat Microwave filter with a wide spurious-free band-stop response
DE19523220A1 (de) * 1995-06-27 1997-01-02 Bosch Gmbh Robert Mikrowellenfilter
IT1284353B1 (it) * 1996-01-30 1998-05-18 Cselt Centro Studi Lab Telecom Cavita' multimodale per filtri in guida d'onda.
IT1284354B1 (it) * 1996-01-30 1998-05-18 Cselt Centro Studi Lab Telecom Cavita' multimodale per filtri n guida d'onda.
US5774030A (en) * 1997-03-31 1998-06-30 Hughes Electronics Corporation Parallel axis cylindrical microwave filter
US7982561B2 (en) * 2008-09-05 2011-07-19 Harris Corporation Resonator system for an RF power amplifier output circuit
US8665039B2 (en) 2010-09-20 2014-03-04 Com Dev International Ltd. Dual mode cavity filter assembly operating in a TE22N mode
CN112436260A (zh) * 2020-11-25 2021-03-02 苏州灿勤通讯技术有限公司 新型te模介质谐振器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3697898A (en) * 1970-05-08 1972-10-10 Communications Satellite Corp Plural cavity bandpass waveguide filter
US3646481A (en) * 1971-03-12 1972-02-29 Bell Telephone Labor Inc Waveguide mode transducer
US4129840A (en) * 1977-06-28 1978-12-12 Rca Corporation Array of directional filters

Also Published As

Publication number Publication date
CA1271532A (fr) 1990-07-10
DE3780367D1 (de) 1992-08-20
DE3621299A1 (de) 1988-01-07
EP0250857A2 (fr) 1988-01-07
EP0250857A3 (en) 1988-12-07
US4734665A (en) 1988-03-29

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