EP0751579B1 - Microwavefilter - Google Patents

Microwavefilter Download PDF

Info

Publication number
EP0751579B1
EP0751579B1 EP96106894A EP96106894A EP0751579B1 EP 0751579 B1 EP0751579 B1 EP 0751579B1 EP 96106894 A EP96106894 A EP 96106894A EP 96106894 A EP96106894 A EP 96106894A EP 0751579 B1 EP0751579 B1 EP 0751579B1
Authority
EP
European Patent Office
Prior art keywords
resonators
resonator
microwave filter
filter according
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
EP96106894A
Other languages
German (de)
French (fr)
Other versions
EP0751579A1 (en
Inventor
Franz-Josef Dipl.-Ing. Goertz
Uwe Dipl.-Ing. Rosenberg
Dietmar Dr.-Ing. Schmitt
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.)
Tesat Spacecom GmbH and Co KG
Original Assignee
Tesat Spacecom GmbH and Co KG
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 Tesat Spacecom GmbH and Co KG filed Critical Tesat Spacecom GmbH and Co KG
Publication of EP0751579A1 publication Critical patent/EP0751579A1/en
Application granted granted Critical
Publication of EP0751579B1 publication Critical patent/EP0751579B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 invention relates to a microwave filter consisting of at least two resonators, a first of which Resonators at least two degenerate wave types are capable of resonance.
  • Such microwave filters are from IEEE MTT, Vol. 20, No. April 15, 1972, pages 258 to 265; IEEE MTT-32, No. 11 November 1984, pages 1449 to 1454 or from the US 36 97 898, US 45 13 264 or US 47 92 771 known.
  • Such filters are characterized in that in Resonators used several wave types at the same time become. In the aforementioned cases, they are degenerate Wave types coupled in each resonator, where this coupling according to the main signal path (Main coupling path) is carried out, that is, in one Wave types located in the resonator form electrically neighboring resonance circuits.
  • Main coupling path Main coupling path
  • Wave types and resonator shapes can also be different advantageous configurations that may result better selection properties by using can have different types of waves. For example you can use it to polarize the input and Optimally adapt output interface. In addition, the Adjustment effort of such a filter is reduced because Coupling device for coupling degenerate shaft types can do without the wave entpyen detune.
  • the microwave filter according to the invention leaves deal with previous resonators, the conventional one Have coupling mechanisms in a simple way to complex Combine filter structures.
  • the microwave filter after the Invention consists of at least two neighboring ones Resonators, two of which are in at least one resonator degenerate resonance wave types that are capable of resonance in the Main coupling path are electrically not immediately adjacent.
  • the microwave filter after the Invention can be made from cavity resonators, dielectric Resonators or coaxial resonators or possible Build combinations of them.
  • a three-circuit filter is to be described as the first exemplary embodiment.
  • This filter consists of two cylindrical resonators, which are arranged axially ( Figure 1).
  • R1 At the first resonator R1 is the coupling b rotated by 90 ° with respect to the coupling a.
  • two degenerate, decoupled wave types H 111 (dual mode) should be capable of resonance.
  • the frequency tuning elements c and d which are only symbolically indicated here, lie.
  • An aperture for magnetic coupling with openings e and f is located in the partition between the two resonators.
  • the openings e and f consist of radial slots which are perpendicular to one another and extend essentially from the outer wall of the cylinder towards the center.
  • the resonators R1 and R2 are accordingly in Active connection with each other that an energy transfer from the in the first resonator R1 resonant first degenerate Wave type to a second resonant there as well degenerate wave type outside of this first resonator R1 takes place and that the possible coupling this degenerate wave types only overcouplings are.
  • the second exemplary embodiment shows a four-circuit Cauer filter, consisting of two cavity resonators, which are used in dual-mode operation.
  • the two degenerate H 111 wave types (modes 1 and 3) should be capable of resonance and in the second resonator R2 the degenerate H 011 - (mode 2) and H 221 - (mode 4) wave types.
  • the peculiarity is that different types of waves are capable of resonance in the resonators, which are not coupled within the resonators.
  • the apertures for each corresponding coupling are like this positioned that unwanted couplings through orthogonal or equally large opposite field components of others Shaft types in the area of the corresponding coupling openings be suppressed.
  • modes 2 and 3 only orthogonal within the coupling opening k23 Field components for modes 1 and 4.
  • Modes 3 and 4 have k34 field components orthogonal in the coupling opening to mode 1 and equally large opposite or orthogonal field components to mode 2.
  • Figure 3 shows an embodiment of a four-circuit filter, which is constructed with three resonators.
  • the first resonator R1 is operated in dual mode (H 111 ) and the other two R2, R3 in single mode (H 211 ).
  • Magnetic couplings are implemented by means of diaphragms (k12, k23, k34).
  • the microwave filter according to the invention can with Waveguide resonators, dielectric resonators, Coaxial resonators or resonators using the Superconductivity can be built up or from combinations hereof.
  • the resonators can also capacitive couplings or combinations of magnetic and capacitive couplings can be used. It the main principle to be observed here is that the possible coupling of the degenerate shaft types are essentially overcouplings. Usually one will strive for coupling of the degenerate shaft types only overcouplings provide; that is, the degenerate wave types are not are coupled to one another via main couplings.

Landscapes

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

Description

Die Erfindung betrifft ein Mikrowellenfilter bestehend aus mindestens zwei Resonatoren, wobei in einem ersten dieser Resonatoren mindestens zwei entartete Wellentypen resonanzfähig sind.The invention relates to a microwave filter consisting of at least two resonators, a first of which Resonators at least two degenerate wave types are capable of resonance.

Stand der TechnikState of the art

Derartige Mikrowellenfilter sind aus IEEE MTT, Vol. 20, No. 15, April 1972, Seiten 258 bis 265; IEEE MTT-32, No. 11, November 1984, Seiten 1449 bis 1454 oder aus der US 36 97 898, US 45 13 264 oder der US 47 92 771 bekannt. Solche Filter sind dadurch gekennzeichnet, daß in Resonatoren mehrere Wellentypen gleichzeitig ausgenutzt werden. In vorgenannten Fällen sind die entarteten Wellentypen in jedem Resonator miteinander verkoppelt, wobei diese Verkopplung entsprechend dem Hauptsignalweg (Hauptkoppelweg) durchgeführt ist, das heißt, die in einem Resonator befindlichen Wellentypen bilden elektrisch benachbarte Resonanzkreise. Im Falle der aus der IEEE MTT. Vol. 25, No. 12, Dezember 1977, Seiten 1021 bis 1026 bekannten Filterstruktur spricht man von der kanonischen Form, bei der eine Hauptkopplung zwischen den Wellentypen eines kurzgeschlossenen Resonators durchgeführt wird, während die Verkopplung der Wellentypen innerhalb der anderen Resonatoren zur Überkopplung (Querkopplung) je einer geradzahligen Anzahl von Resonanzkreisen dient.Such microwave filters are from IEEE MTT, Vol. 20, No. April 15, 1972, pages 258 to 265; IEEE MTT-32, No. 11 November 1984, pages 1449 to 1454 or from the US 36 97 898, US 45 13 264 or US 47 92 771 known. Such filters are characterized in that in Resonators used several wave types at the same time become. In the aforementioned cases, they are degenerate Wave types coupled in each resonator, where this coupling according to the main signal path (Main coupling path) is carried out, that is, in one Wave types located in the resonator form electrically neighboring resonance circuits. In the case of the IEEE MTT. Vol. 25, No. 12, December 1977, pages 1021 to 1026 known filter structure is called the canonical Shape where a main coupling between the shaft types a short-circuited resonator is carried out, while coupling the shaft types within the other resonators for overcoupling (cross coupling) one each even number of resonance circuits.

Vorteile der ErfindungAdvantages of the invention

Mit den Maßnahmen gemäß den Merkmalen des Anspruchs 1 lassen sich auf einfache Weise neue Filterstrukturen realisieren. Bei den aus dem Stand der Technik bekannten Filterstrukturen, die unter anderem entartete Wellentypen innerhalb von Resonatoren verwenden, ist mindestens in einem Resonator eine Verkopplung der in diesem Resonator befindlichen entarteten Wellentypen notwendig. Die Erfindung kommt ohne eine solche Verkopplung entarteter Wellentypen innerhalb von Resonatoren aus. Durch die Verwendung von unterschiedlichen Wellentypen, insbesondere durch Kombination von höhermodigen Resonatoren mit Single-Mode-Resonatoren, die eine höhere Güte aufweisen, kann eine geringere Einfügungsdämpfung im Vergleich zu einem Filter erreicht werden, welches für alle Kreise den gleichen Wellentyp ausnutzen würde. Durch die Realisierung anderer Wellentypen und Resonatorformen können sich zudem weitere vorteilhafte Konfigurationen ergeben, die unter Umständen bessere Selektionseigenschaften durch die Verwendung von unterschiedlichen Wellentypen aufweisen können. Zum Beispiel kann man damit die Polarisation der Ein- und Ausgangsschnittstelle optimal anpassen. Zudem wird der Abgleichaufwand eines solchen Filters reduziert, da man auf Koppelmittel zur Verkopplung entarteter Wellentypen verzichten kann, die beim Abgleich die Wellentpyen verstimmen. Das Mikrowellenfilter nach der Erfindung läßt sich mit bisherigen Resonatoren, die herkömmliche Koppelmechanismen aufweisen, auf einfache Weise zu komplexen Filterstrukturen kombinieren. Das Mikrowellenfilter nach der Erfindung besteht aus mindestens zwei benachbarten Resonatoren, von denen in mindestens einem Resonator zwei entartete Resonanzwellentypen resonanzfähig sind, die im Hauptkoppelweg elektrisch nicht unmittelbar benachbart sind. Im Hauptkoppelweg zwischen den Resonanzwellentypen sind mögliche entartete Wellentypen innerhalb anderer Resonatoren nicht miteinander verkoppelt. Das Mikrowellenfilter nach der Erfindung läßt sich aus Hohlraumresonatoren, dielektrischen Resonatoren oder Koaxial-Resonatoren oder möglichen Kombinationen davon aufbauen.Leave with the measures according to the features of claim 1 realize new filter structures in a simple way. In those known from the prior art Filter structures that include degenerate wave types Use within resonators is at least one Resonator a coupling of those in this resonator degenerate shaft types are necessary. The invention comes without such a coupling of degenerate wave types inside of resonators. By the use of different types of waves, in particular by Combination of higher-mode resonators with Single-mode resonators, which have a higher quality, may have lower insertion loss compared to a Filters are reached, which are the same for all circles Would exploit wave type. By realizing others Wave types and resonator shapes can also be different advantageous configurations that may result better selection properties by using can have different types of waves. For example you can use it to polarize the input and Optimally adapt output interface. In addition, the Adjustment effort of such a filter is reduced because Coupling device for coupling degenerate shaft types can do without the wave entpyen detune. The microwave filter according to the invention leaves deal with previous resonators, the conventional one Have coupling mechanisms in a simple way to complex Combine filter structures. The microwave filter after the Invention consists of at least two neighboring ones Resonators, two of which are in at least one resonator degenerate resonance wave types that are capable of resonance in the Main coupling path are electrically not immediately adjacent. In the main coupling path between the resonance wave types are possible degenerate wave types within other resonators not linked together. The microwave filter after the Invention can be made from cavity resonators, dielectric Resonators or coaxial resonators or possible Build combinations of them.

Zeichnungendrawings

Anhand der Figuren werden einige Ausführungsbeispiele der Erfindung näher erläutert. Es zeigen

  • Figur 1 ein Ausführungsbeispiel eines Dreikreisfilters mit Lage der Blenden und Feldvektoren,
  • Figur 2 ein Ausführungsbeispiel eines Vierkreis-Cauer-Filters mit Lage der Blenden und Feldvektoren,
  • Figur 3 ein Ausführungsbeispiel eines Vierkreisfilters mit drei Resonatoren.
    • Some exemplary embodiments of the invention are explained in more detail with reference to the figures. Show it
  • FIG. 1 shows an exemplary embodiment of a three-circuit filter with the position of the diaphragms and field vectors,
  • FIG. 2 shows an exemplary embodiment of a four-circle Cauer filter with the position of the diaphragms and field vectors,
  • Figure 3 shows an embodiment of a four-circuit filter with three resonators.

    • Beschreibung der ErfindungDescription of the invention

    Als erstes Ausführungsbeispiel soll ein Dreikreisfilter beschrieben werden. Dieses Filter besteht aus zwei Zylinderresonatoren, die axial angeordnet sind (Figur 1). Am ersten Resonator R1 befindet sich die gegenüber der Einkopplung a um 90° gedrehte Auskopplung b. In diesem Resonator sollen zwei entartete entkoppelte Wellentypen H111 (Dual-Mode) resonanzfähig sein. Gegenüber der Einkopplung und der Auskopplung liegen die hier nur symbolisch angedeuteten Frequenzabstimmelemente c und d. Eine Blende zur magnetischen Kopplung mit den Öffnungen e und f befindet sich in der Trennwand zwischen den beiden Resonatoren. Die Öffnungen e und f bestehen aus radialen Schlitzen, die senkrecht aufeinanderstehen und sich im wesentlichen von der Zylinderaußenwand in Richtung Zentrum hin erstrecken.A three-circuit filter is to be described as the first exemplary embodiment. This filter consists of two cylindrical resonators, which are arranged axially (Figure 1). At the first resonator R1 is the coupling b rotated by 90 ° with respect to the coupling a. In this resonator, two degenerate, decoupled wave types H 111 (dual mode) should be capable of resonance. Compared to the coupling and decoupling, the frequency tuning elements c and d, which are only symbolically indicated here, lie. An aperture for magnetic coupling with openings e and f is located in the partition between the two resonators. The openings e and f consist of radial slots which are perpendicular to one another and extend essentially from the outer wall of the cylinder towards the center.

    Im zweiten Resonator R2 ist der H011-Wellentyp (Single-Mode) resonanzfähig, der durch das Frequenzabstimmelement g abgleichbar ist. Der H011-Wellentyp weist parallele Feldkomponenten in der Blendenebene sowohl zum ersten als auch zum zweiten H111-Wellentyp des ersten Resonators auf. Durch die Lage und Größe der Koppelöffnungen e und f in der Blende kann man z.B. eine magnetische Verkopplung der Kreise in folgender Weise realisieren:

  • Der Mode 1 im ersten Resonator R1 koppelt auf den Single-Mode 2 im zweiten Resonator R2 über den Blendenschlitz e. Der Single-Mode koppelt auf den Mode 3 im ersten Resonator R1 über den Blendenschlitz f. Auf diese Weise erhält man einen Hauptkoppelweg 1-2-3.
    • In the second resonator R2, the H 011 wave type (single mode) is capable of resonance, which can be adjusted by means of the frequency tuning element g. The H 011 wave type has parallel field components in the diaphragm plane both to the first and to the second H 111 wave type of the first resonator. Due to the position and size of the coupling openings e and f in the aperture, a magnetic coupling of the circles can be realized in the following way:
  • Mode 1 in the first resonator R1 couples to single mode 2 in the second resonator R2 via the diaphragm slot e. The single mode couples to mode 3 in the first resonator R1 via the aperture slot f. In this way, a main coupling path 1-2-3 is obtained.

    • Die Resonatoren R1 und R2 stehen demnach derart in Wirkverbindung miteinander, daß ein Energietransfer von dem im ersten Resonator R1 resonanzfähigen ersten entarteten Wellentyp auf einen zweiten dort ebenfalls resonanzfähigen entarteten Wellentyp außerhalb dieses ersten Resonators R1 stattfindet und daß die möglichen Verkopplungen dieser entarteten Wellentypen untereinander nur Überkopplungen sind.The resonators R1 and R2 are accordingly in Active connection with each other that an energy transfer from the in the first resonator R1 resonant first degenerate Wave type to a second resonant there as well degenerate wave type outside of this first resonator R1 takes place and that the possible coupling this degenerate wave types only overcouplings are.

    Das zweite Ausführungsbeispiel (Figur 2) zeigt einen Vierkreis-Cauer-Filter, bestehend aus zwei Hohlraumresonatoren, die im Dual-Mode-Betrieb verwendet werden. Im ersten Resonator R1 sollen die beiden entarteten H111-Wellentypen (Mode 1 und 3) resonanzfähig sein und im zweiten Resonator R2 die entarteten H011-(Mode 2) und H221-(Mode 4)Wellentypen. Die Besonderheit besteht darin, daß verschiedene Wellentypen in den Resonatoren resonanzfähig sind, die innerhalb der Resonatoren nicht verkoppelt sind.The second exemplary embodiment (FIG. 2) shows a four-circuit Cauer filter, consisting of two cavity resonators, which are used in dual-mode operation. In the first resonator R1 the two degenerate H 111 wave types (modes 1 and 3) should be capable of resonance and in the second resonator R2 the degenerate H 011 - (mode 2) and H 221 - (mode 4) wave types. The peculiarity is that different types of waves are capable of resonance in the resonators, which are not coupled within the resonators.

    Auch in diesem Beispiel werden ausschließlich magnetische Kopplungen über Blenden realisiert. Bemerkenswert ist hierbei, daß ein weitgehend unabhängiges Blendendesign für die Hauptkopplungen k12, k23 und k34 und positive oder negative Nebenkopplung k14 möglich ist.In this example too, only magnetic ones are used Couplings implemented via panels. Remarkably here that a largely independent aperture design for the main couplings k12, k23 and k34 and positive or negative secondary coupling k14 is possible.

    Die Blendenöffnungen für jede entsprechende Kopplung sind so positioniert, daß unerwünschte Kopplungen durch orthogonale oder gleich große entgegengesetzte Feldkomponenten anderer Wellentypen im Bereich der entsprechenden Koppelöffnungen unterdrückt werden. So haben z.B. die Moden 2 und 3 innerhalb der Koppelöffnung k23 nur orthogonale Feldkomponenten zu den Moden 1 und 4. Die Moden 3 und 4 weisen in der Koppelöffnung k34 Feldkomponenten orthogonal zum Mode 1 und gleich große entgegengesetzte bzw. orthogonale Feldkomponenten zum Mode 2 auf.The apertures for each corresponding coupling are like this positioned that unwanted couplings through orthogonal or equally large opposite field components of others Shaft types in the area of the corresponding coupling openings be suppressed. For example, modes 2 and 3 only orthogonal within the coupling opening k23 Field components for modes 1 and 4. Modes 3 and 4 have k34 field components orthogonal in the coupling opening to mode 1 and equally large opposite or orthogonal field components to mode 2.

    Figur 3 zeigt ein Ausführungsbeispiel eines Vierkreisfilters, welches mit drei Resonatoren aufgebaut ist. Der erste Resonator R1 wird dabei im Dual-Mode (H111) betrieben und die anderen beiden R2, R3 im Single-Mode (H211). Durch Blenden werden magnetische Kopplungen realisiert (k12, k23, k34).Figure 3 shows an embodiment of a four-circuit filter, which is constructed with three resonators. The first resonator R1 is operated in dual mode (H 111 ) and the other two R2, R3 in single mode (H 211 ). Magnetic couplings are implemented by means of diaphragms (k12, k23, k34).

    Zu beachten ist, daß die Zeichnungen nur das Prinzip der Erfindung darstellen. Die unterschiedlichen Wellentypen bedingen natürlich unterschiedliche Dimensionen der Resonatoren, bei den gezeigten zylindrischen Hohlraumresonatoren insbesondere unterschiedliche Durchmesser. It should be noted that the drawings only the principle of Represent invention. The different types of waves naturally require different dimensions of the Resonators, in the cylindrical shown Cavity resonators in particular different Diameter.

    Neben den gezeigten Wellentyp-Kombinationen lassen sich noch beliebige weitere Kombinationen finden, die nach dem Prinzip der Erfindung arbeiten, z.B. Tripel-Dual-Mode-Resonatoren. Das Mikrowellenfilter nach der Erfindung kann mit Hohlleiter-Resonatoren, dielektrischen Resonatoren, Koaxial-Resonatoren oder Resonatoren unter Verwendung der Supraleitung aufgebaut werden oder aus Kombinationen hiervon.In addition to the shown shaft type combinations, find any other combinations based on the principle of the invention, e.g. Triple dual-mode resonators. The microwave filter according to the invention can with Waveguide resonators, dielectric resonators, Coaxial resonators or resonators using the Superconductivity can be built up or from combinations hereof.

    Anstelle der magnetischen Kopplung der Resonatoren können auch kapazitive Kopplungen oder Kombinationen von magnetischen und kapazitiven Kopplungen verwendet werden. Es ist hierbei nur das Hauptprinzip zu beachten, daß die möglichen Verkopplungen der entarteten Wellentypen untereinander im wesentlichen Überkopplungen sind. Normalerweise wird man bestrebt sein, für die Verkopplung der entarteten Wellentypen ausschließlich Überkopplungen vorzusehen; das heißt, daß die entarteten Wellentypen nicht über Hauptkopplungen miteinander gekoppelt sind.Instead of magnetic coupling the resonators can also capacitive couplings or combinations of magnetic and capacitive couplings can be used. It the main principle to be observed here is that the possible coupling of the degenerate shaft types are essentially overcouplings. Usually one will strive for coupling of the degenerate shaft types only overcouplings provide; that is, the degenerate wave types are not are coupled to one another via main couplings.

    Claims (10)

    1. Microwave filter, consisting of at least two resonators (R1, R2, R3), whereby in a first one of these resonators (R1) at least two degenerate wave modes are capable of resonance, characterised in that the resonators (R1, R2, R3) are coupled such that a transfer of energy from a first degenerate wave mode capable of resonance in the first resonator (R1) to a further degenerate wave mode also capable of resonance there essentially takes place outside this first resonator (R1) and that the possible couplings between the degenerate wave modes are overcouplings.
    2. Microwave filter according to Claim 1, characterised in that the first resonator (R1) is operated in dual mode and its electrically adjacent resonator (R2) is operated in single mode.
    3. Microwave filter according to Claim 1, characterised in that the first resonator (R1) as well as its further electrically adjacent resonator (R2) is operated in dual mode.
    4. Microwave filter according to Claim 1, characterised in that the first resonator (R1) is operated in triple mode and its electrically adjacent resonator (R2) is operated in dual mode.
    5. Microwave filter according to Claim 2, characterised in that a further resonator (R3) operated in single mode is electrically adjacent to the first resonator (R1).
    6. Microwave filter according to one of Claims 1 to 5, characterised in that degenerate wave modes in the resonators (R1, R2, R3) are not coupled together by means of main couplings.
    7. Microwave filter according to one of Claims 1 to 6, characterised in that the microwave filter (R1, R2, R3) is combined with further resonators which have traditional coupling mechanisms.
    8. Microwave filter according to one of Claims 1 to 7, characterised in that the microwave filter consists of cavity resonators, dielectric resonators, coaxial resonators and/or resonators under the use of supraconductivity.
    9. Microwave filter according to one of Claims 1 to 8, characterised in that the resonators are coupled magnetically by means of apertures in their walls.
    10. Microwave filter according to one of Claims 1 to 9, characterised in that coupling and decoupling of the microwave filter are effected at only one of the resonators, with these being arranged at a 90° angle to each other.
    EP96106894A 1995-06-27 1996-05-02 Microwavefilter Expired - Lifetime EP0751579B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19523220A DE19523220A1 (en) 1995-06-27 1995-06-27 Microwave filter
    DE19523220 1995-06-27

    Publications (2)

    Publication Number Publication Date
    EP0751579A1 EP0751579A1 (en) 1997-01-02
    EP0751579B1 true EP0751579B1 (en) 2002-11-27

    Family

    ID=7765296

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96106894A Expired - Lifetime EP0751579B1 (en) 1995-06-27 1996-05-02 Microwavefilter

    Country Status (4)

    Country Link
    US (1) US6066996A (en)
    EP (1) EP0751579B1 (en)
    CA (1) CA2178702C (en)
    DE (2) DE19523220A1 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US9325046B2 (en) 2012-10-25 2016-04-26 Mesaplexx Pty Ltd Multi-mode filter
    US9614264B2 (en) 2013-12-19 2017-04-04 Mesaplexxpty Ltd Filter
    US9843083B2 (en) 2012-10-09 2017-12-12 Mesaplexx Pty Ltd Multi-mode filter having a dielectric resonator mounted on a carrier and surrounded by a trench

    Families Citing this family (10)

    * 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
    DE10123318A1 (en) * 2001-05-14 2002-12-05 Marconi Comm Gmbh microwave filters
    US8665039B2 (en) 2010-09-20 2014-03-04 Com Dev International Ltd. Dual mode cavity filter assembly operating in a TE22N mode
    US9406988B2 (en) 2011-08-23 2016-08-02 Mesaplexx Pty Ltd Multi-mode filter
    US9437910B2 (en) 2011-08-23 2016-09-06 Mesaplexx Pty Ltd Multi-mode filter
    GB201303024D0 (en) * 2013-02-21 2013-04-03 Mesaplexx Pty Ltd Filter
    GB201303018D0 (en) * 2013-02-21 2013-04-03 Mesaplexx Pty Ltd Filter
    GB201303016D0 (en) * 2013-02-21 2013-04-03 Mesaplexx Pty Ltd Filter
    GB201303019D0 (en) * 2013-02-21 2013-04-03 Mesaplexx Pty Ltd Filter
    GB201303013D0 (en) * 2013-02-21 2013-04-03 Mesaplexx Pty Ltd Filter

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2795763A (en) * 1951-05-03 1957-06-11 Bell Telephone Labor Inc Microwave filters
    JPS62204601A (en) * 1986-03-04 1987-09-09 Murata Mfg Co Ltd Dual mode filter
    DE3621299A1 (en) * 1986-06-25 1988-01-07 Ant Nachrichtentech MICROWAVE FILTER
    DE3621298A1 (en) * 1986-06-25 1988-01-07 Ant Nachrichtentech MICROWAVE FILTER WITH MULTIPLE-COUPLED HOMELINE RESONATORS
    US5083102A (en) * 1988-05-26 1992-01-21 University Of Maryland Dual mode dielectric resonator filters without iris
    US5498171A (en) * 1994-07-05 1996-03-12 Ford Motor Company Connector locking and unlocking configuration

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US9843083B2 (en) 2012-10-09 2017-12-12 Mesaplexx Pty Ltd Multi-mode filter having a dielectric resonator mounted on a carrier and surrounded by a trench
    US9325046B2 (en) 2012-10-25 2016-04-26 Mesaplexx Pty Ltd Multi-mode filter
    US9614264B2 (en) 2013-12-19 2017-04-04 Mesaplexxpty Ltd Filter

    Also Published As

    Publication number Publication date
    EP0751579A1 (en) 1997-01-02
    CA2178702C (en) 2000-07-18
    US6066996A (en) 2000-05-23
    DE59609902D1 (en) 2003-01-09
    DE19523220A1 (en) 1997-01-02
    CA2178702A1 (en) 1996-12-28

    Similar Documents

    Publication Publication Date Title
    DE69114216T2 (en) Tunable bandpass filter.
    DE3688375T2 (en) TRIPLE MODE WITH BAND PASS FILTERS LOADED WITH DIELECTRIC RESONATORS.
    DE2510854A1 (en) BANDPASS FILTER FOR MICROWAVES
    EP0751579B1 (en) Microwavefilter
    DE2122337A1 (en) Cavity resonator filter
    DE1108823B (en) Bandpass filter with high slope
    DE60209671T2 (en) Microwave bandpass filter with canonical general filter curve
    DE69603280T2 (en) SURFACE FILTER USING THE COUPLING BETWEEN THREE ACOUSTIC TRACKS
    DE2654283A1 (en) FILTER FOR VERY SHORT ELECTROMAGNETIC WAVES
    DE2841754A1 (en) MICROWAVE FILTER
    DE69125641T2 (en) Modular dielectric notch filter
    EP0250857B1 (en) Microwave filter
    DE2653856C2 (en) Filter for very short electromagnetic waves
    DE3111106A1 (en) Polarisation filter
    EP1266423B1 (en) Cavity resonator having an adjustable resonance frequency
    DE2828047C2 (en) Frequency-dependent coupling system
    DE2657649A1 (en) FILTER FOR VERY SHORT ELECTROMAGNETIC WAVES
    DE2056528C3 (en) Filter for very short electromagnetic waves
    DE2640210C3 (en) Filter for very short electromagnetic waves
    DE60133500T2 (en) Resonator, in particular for a microwave filter and thus provided filter
    DE2511800C3 (en) Microwave filters with cavity resonators operated in dual mode and additional overcouplings
    EP0813266A2 (en) Microwave filter comprising several coaxial resonators
    DE3708964C2 (en)
    DE2339441C3 (en) Frequency-dependent coupling system
    DE10123318A1 (en) microwave filters

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): DE FR GB IT

    17P Request for examination filed

    Effective date: 19970702

    17Q First examination report despatched

    Effective date: 20000425

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: TESAT-SPACECOM GMBH & CO. KG

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE FR GB IT

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REF Corresponds to:

    Ref document number: 59609902

    Country of ref document: DE

    Date of ref document: 20030109

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20030224

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20030408

    Year of fee payment: 8

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20030520

    Year of fee payment: 8

    ET Fr: translation filed
    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20030828

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20031202

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20040502

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20040502

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050131

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050502