EP0068919B1 - Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators - Google Patents

Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators Download PDF

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Publication number
EP0068919B1
EP0068919B1 EP19820400954 EP82400954A EP0068919B1 EP 0068919 B1 EP0068919 B1 EP 0068919B1 EP 19820400954 EP19820400954 EP 19820400954 EP 82400954 A EP82400954 A EP 82400954A EP 0068919 B1 EP0068919 B1 EP 0068919B1
Authority
EP
European Patent Office
Prior art keywords
hole
cavity
axis
resonator
diver
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
EP19820400954
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English (en)
French (fr)
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EP0068919A1 (de
Inventor
Xavier Delestre
Jean-Claude Curtinot
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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Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0068919A1 publication Critical patent/EP0068919A1/de
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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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators

Definitions

  • the present invention relates to a microwave resonator of the variable dielectric capacitor type placed in a cavity having a longitudinal axis of symmetry AA, the resonator comprising a first and a second cylindrical part, of the same axis XX perpendicular to the axis AA, coupled respectively with two walls facing the cavity, the first part passing right through the wall to which it is coupled and comprising a plunger whose position relative to the second part is adjustable.
  • Such resonators are known, the first and second parts of which are respectively associated with two walls opposite the cavity to form, for example, with this cavity and other identical resonators, an agile frequency filter, that is to say a filter intended to work in several frequency ranges, or channels and capable of passing quickly from one range or from one channel to another.
  • French patent number 1 046 593 describes one of these resonators using its figure 5.
  • a cavity and a resonator of the variable dielectric capacitor type comprising a first part consisting of a plunger which slides at through a hole drilled directly in a first wall of the cavity, and a second part consisting of a fixed frame disposed on a second wall opposite the first.
  • the plunger comprises a metal rod which is in contact with the cavity in the crossing of the hole; this rod constitutes the movable element of the capacitor.
  • the plunger also comprises, towards the end of the metal rod close to the fixed frame, a layer of dielectric material which constitutes the dielectric of the capacitor.
  • the object of the present invention is to remedy these defects.
  • a resonator of the type indicated at the beginning of this description the first part of which also includes a metal part pierced right through with a cylindrical hole of axis XX and located at a given distance from the second part, and the plunger of which is adjustable by displacement along the axis XX in the hole so that only one end portion of the plunger can come out of the hole in the direction of the second part, is characterized in that at least this end portion is entirely made of dielectric, allowing to modify only the capacitance of the capacitor without modifying the lines of the electric field in the space located between the two armatures of the capacitor.
  • resonators having the appearance of the resonator according to the invention are also known, but are not dielectric resonators and, in these known resonators, the plunger is entirely metallic, so that the problem of contact is poses in the same way as with the known dielectric resonators described above.
  • the figure is a partial view, in section, of an agile frequency filter which shows a resonator according to the invention.
  • the figure represents a portion of a cavity, 1, made in a square guide, of axis of longitudinal symmetry AA.
  • the section plane of the figure is a plane of longitudinal symmetry of the waveguide, parallel to two of the sides of the guide; this section makes it possible to see the internal face of a first side, 12, of the guide as well as the walls 10, 11 which constitute the two sides of the guide perpendicular to the first side 12.
  • a helical spring 25 disposed between the head of the metal part 20 and the head of the rod 21, the role of which is to tend to bring the plunger out of the cavity when by pressure it is pressed towards the interior of the cavity to through hole 24.
  • Part 3 consists of a cylinder of axis XX, fitted at one of its ends in the wall 11 and comprising at the other of its ends a cylindrical hole 30, also of axis XX and of diameter equal to the diameter of the hole 24 of the metal part 20.
  • the rod 21 of the plunger is a metal rod which, like the metal part 20, the cylinder constituting the part 3 and the interior of the cavity, is made of metal. silvery, but the sliding of this rod 21 in the hole with a metal wall 24 poses practically no problem. In fact, this metal rod 21, at the maximum of the depression of the plunger, remains distant from the orifice of the hole 24 in the cavity; this hole 24 is too small for the waves which circulate in the cavity to propagate therein and for the rod 21 to be subjected to an electric field; there are therefore no surface currents at the level of the sliding contact between the plunger and the metallic part 20.
  • the value of the capacity of the resonator according to the invention is not greatly modified by a slight lack of coaxiality between the plunger and the parts 20 and 3, unlike what occurs with all-metal plunger resonators.
  • the invention is not limited to the example described and shown, this is how, for example, the cavity 1 can be produced in a rectangular or round guide and that the rod 22 can be of a diameter just less than that holes 24 and 30.
  • the plunger 21, 22 can be made entirely of dielectric and the metal part 20 can be fixed.
  • the fixed part, 3, of the resonator it may not have a hole such as 30, the adjustment of the plunger 21, 22 being effected by bringing the fixed part closer but without penetration.

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

Claims (3)

1. Mikrowellenresonator vom Typ eines variablen Kondensators mit Dielektrikum, der sich in einem Hohlraum (1) mit einer Längssymmetrieachse AA befindet, wobei der Resonator ein erstes und ein zweites zylindrisches Teil (2, 3) besitzt, deren gemeinsame Achse XX senkrecht zur Achse AA verläuft und die je an eine von zwei einander gegenüberliegenden Wänden (10, 11) des Hohlraums angekoppelt sind, und wobei der erste Teil die Wand (10), mit der er gekoppelt ist, ganz durchguert und einen Tauchkern (21, 22) besitzt, dessen Lage bezüglich des zweiten Teils einstellbar ist, und wobei der erste Teil (2) außerdem ein Metallstück (20) enthält, das in seiner ganzen Länge von einem zylindrischen Loch (24) mit der Achse XX durchguert wird und sich in einem gegebenen Abstand (e) vom zweiten Teil (3) befindet, und wobei der Tauchkern durch seine Verschiebung entlang der Achse XX im Loch so einstellbar ist, daß ein Endbereich (22) des Tauchkerns, und nur dieser, aus dem Loch in Richtung auf den zweiten Teil vorstehen kann, dadurch gekennzeichnet, daß mindestens dieser Endbereich ganz aus dielektrischem Material besteht, das geeignet ist, nur die Kapazität des Kondensators zu ändern, nicht dagegen die elektrischen Feldlinien im Raum zwischen den beiden von dem Metallstück (20) und dem Metallzylinder (3) gebildeten Kondensatorarmaturen.
2. Resonator nach Anspruch 1, dadurch gekennzeichnet, daß der gegebene Abstand (e) durch Einstellung der Eindringtiefe des Metallstücks (20) in die mit dem ersten Teil gekoppelte Wand (10) des Hohlraums einstellbar ist.
3. Resonator nach Anspruch 1, dadurch gekennzeichnet, daß das zweite Teil (3) ein Zylinder ist, der an seinem gegenüber dem ersten Teil (2) liegenden Ende ein Loch (30) besitzt, in das der Endbereich (22) des Tauchkerns eindringen kann.
EP19820400954 1981-06-02 1982-05-24 Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators Expired EP0068919B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8110899A FR2507018A1 (fr) 1981-06-02 1981-06-02 Resonateur hyperfrequence du type condensateur variable a dielectrique
FR8110899 1981-06-02

Publications (2)

Publication Number Publication Date
EP0068919A1 EP0068919A1 (de) 1983-01-05
EP0068919B1 true EP0068919B1 (de) 1986-08-13

Family

ID=9259102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820400954 Expired EP0068919B1 (de) 1981-06-02 1982-05-24 Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators

Country Status (3)

Country Link
EP (1) EP0068919B1 (de)
DE (1) DE3272552D1 (de)
FR (1) FR2507018A1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1192635A (en) * 1983-05-16 1985-08-27 Northern Telecom Limited Microwave cavity tuner
FR2627329B1 (fr) * 1988-02-12 1990-03-23 Alcatel Espace Filtre a resonateur dielectrique
US5968876A (en) * 1997-04-21 1999-10-19 Conductus, Inc. Compressable tuning element for microwave resonators and method of making same
US6147577A (en) * 1998-01-15 2000-11-14 K&L Microwave, Inc. Tunable ceramic filters
DE19917087C2 (de) * 1999-04-15 2001-07-26 Kathrein Werke Kg Hochfrequenzfilter
DE102010056048A1 (de) * 2010-12-23 2012-06-28 Kathrein-Werke Kg Abstimmbares Hochfrequenzfilter
DE102012020979A1 (de) * 2012-10-25 2014-04-30 Kathrein-Werke Kg Abstimmbares Hochfrequenzfilter
DE102012022411A1 (de) * 2012-11-15 2014-05-15 Kathrein-Austria Gmbh Hochfrequenzfilter mit Frequenzstabilisierung
CN104981938A (zh) * 2013-12-31 2015-10-14 华为技术有限公司 一种介质谐振器、介质滤波器及通信设备
GB2540007A (en) * 2015-04-28 2017-01-04 Rhodes David A tuneable microwave filter and a tuneable microwave multiplexer
RU2696817C1 (ru) * 2019-01-09 2019-08-06 Михаил Борисович Гойхман Перестраиваемый полосно-запирающий волноводный фильтр

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1046593A (fr) * 1951-05-11 1953-12-08 Centre Nat Rech Scient Résonateur électromagnétique accordable sur ondes métriques et décimétriques et dispositifs utilisant ce résonateur
DE1223966B (de) * 1959-09-30 1966-09-01 Siemens Ag Hohlleiterbandfilter
US4127834A (en) * 1977-08-29 1978-11-28 Motorola, Inc. Temperature compensating apparatus for microwave oscillators and the like
FR2477783A1 (fr) * 1980-03-04 1981-09-11 Thomson Csf Dispositif d'accord a capacite variable et filtre hyperfrequences accordable comportant au moins un tel dispositif

Also Published As

Publication number Publication date
FR2507018B1 (de) 1984-11-09
EP0068919A1 (de) 1983-01-05
FR2507018A1 (fr) 1982-12-03
DE3272552D1 (en) 1986-09-18

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