EP0601371A1 - Dielectric resonator - Google Patents

Dielectric resonator Download PDF

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Publication number
EP0601371A1
EP0601371A1 EP93118717A EP93118717A EP0601371A1 EP 0601371 A1 EP0601371 A1 EP 0601371A1 EP 93118717 A EP93118717 A EP 93118717A EP 93118717 A EP93118717 A EP 93118717A EP 0601371 A1 EP0601371 A1 EP 0601371A1
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EP
European Patent Office
Prior art keywords
dielectric
housing
metal rod
dielectric resonator
resonator according
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.)
Ceased
Application number
EP93118717A
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German (de)
French (fr)
Inventor
Uwe Dipl.-Ing. Rosenberg
Konstantin Dipl.-Ing. Beis
Werner Speldrich
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH, ANT Nachrichtentechnik GmbH filed Critical Robert Bosch GmbH
Publication of EP0601371A1 publication Critical patent/EP0601371A1/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/10—Dielectric resonators

Definitions

  • the present invention relates to a dielectric resonator which has a dielectric body which is arranged in a housing and is fixed in the housing.
  • Such a dielectric resonator is known from EP 316 813 A1.
  • a dielectric ring serves as the holder for the dielectric cylinder, the dielectric constant of which is lower than that of the cylinder.
  • Such an arrangement proves to be disadvantageous if heat is generated in the dielectric cylinder which should be dissipated as quickly as possible.
  • the invention is based on the object of specifying a dielectric resonator of the type mentioned at the outset which ensures the best possible heat dissipation for the dielectric body and the quality of which is impaired as little as possible by the heat dissipation measures.
  • the metal rod (s) provided according to the invention not only ensure good heat dissipation, but also represent a holder for the dielectric body that can be implemented with very little effort.
  • the housing 1 shows a dielectric resonator with a dielectric body in the form of a cylinder 2 arranged in a housing 1.
  • the housing 1 and the dielectric cylinder 2 are circular.
  • the circular shape is not binding for the function of the resonator, e.g. also rectangular, triangular, elliptical etc. dielectric cylinders in e.g. round, rectangular, elliptical etc. housing can be used.
  • metal rods 3 are provided, which completely penetrate the dielectric cylinder 2 in the direction of its longitudinal axis and are connected to it.
  • the ends of the metal bars 3 are attached to opposite walls of the housing 1. So that as little current as possible is induced in the metal rods 3, ie the resonator quality is influenced as little as possible, the metal rods 3 are placed in such a way that they are almost orthogonal to the electrical and magnetic ones Field lines of the resonator are oriented. This is the case with a TE01 ⁇ resonator wave type where the electric field has a maximum. Under the conditions mentioned, rods made of metal, which are able to rapidly dissipate large amounts of heat from the dielectric cylinder 2, can be used without any significant loss of resonator quality.
  • the number of rods is specified by the requirement for the fixing of the dielectric cylinder 2 and the amount of heat to be dissipated.
  • FIGS. 2 and 3 show two further variants for holding the dielectric cylinder 2 using the example of a metal rod 4, 5.
  • a metal rod 4 which is fastened at one end to a wall of the housing 1, only partially penetrates into the dielectric cylinder 2 at its other end.
  • a metal rod 5 is attached at one end to a wall of the housing 1 and at the other end to the dielectric cylinder 2 without penetrating into it.
  • such holders offer the best heat dissipation, in which the metal rods have the largest contact area with the dielectric body 2.
  • FIG. 4 shows the dielectric cylinder 2 in the exemplary embodiment of a dielectric resonator shown in FIG. 4, the dielectric cylinder 2 is held by a metal rod 6 which completely penetrates it orthogonally to its longitudinal axis and is fastened with its two ends to opposite wall sides of the housing 1.
  • the metal rod 6 also causes here again good heat dissipation from the dielectric cylinder 2, without it having a significant influence on the resonator quality.
  • FIG. 5 shows the mounting of the dielectric cylinder just described by means of a metal rod 6 that completely penetrates it, in a cross-sectional representation.
  • the continuous metal rod 6 can also be replaced by two diametrically opposed metal rods 7 and 8, which only partially penetrate into the dielectric cylinder 2 from both sides and are fastened to the latter.
  • the metal rod or rods may be sufficient for heat dissipation and / or retention of the dielectric cylinder. place it only on the metal rod (or metal rods).
  • a particularly good heat dissipation can be achieved in that the metal rods 7 and 8 are each contacted with a further metal rod 9 or 10 arranged orthogonally thereto in the dielectric cylinder 2 (cf. FIG. 7).
  • the number of metal rods used depends on the requirements for the fixation and the heat dissipation.
  • the dielectric body which is represented as a cylinder in the exemplary embodiments described above, can consist of several regions with different material properties. For example, at least one area can be provided which ensures good heat transfer from the dielectric body into the metal rod (or metal rods).

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Abstract

The dielectric resonator consists of a dielectric cylinder (2) arranged in a housing (1). Good removal of heat from this dielectric cylinder (2) is achieved by the dielectric cylinder (2) being held in the housing (1) with at least one metal bar (3) which is connected, on one side, with the dielectric cylinder (3) and, on the other side, with the housing (1), which bar extends through the internal space of the housing (1) so that it is aligned as much as possible orthogonal to the magnetic and electric field lines. <IMAGE>

Description

Die vorliegende Erfindung betrifft einen dielektrischen Resonator, welcher einen in einem Gehäuse angeordneten dielektrischen Körper aufweist, der in dem Gehäuse fixiert ist.The present invention relates to a dielectric resonator which has a dielectric body which is arranged in a housing and is fixed in the housing.

Ein derartiger dielektrischer Resonator ist aus EP 316 813 A1 bekannt. Dabei dient als Halterung für den dielektrischen Zylinder ein dielektrischer Ring, dessen Dielektrizitätskonstante geringer ist als die des Zylinders. Als nachteilig erweist sich eine solche Anordnung, wenn im dielektrischen Zylinder Wärme entsteht, die möglichst rasch abgeführt werden sollte.Such a dielectric resonator is known from EP 316 813 A1. A dielectric ring serves as the holder for the dielectric cylinder, the dielectric constant of which is lower than that of the cylinder. Such an arrangement proves to be disadvantageous if heat is generated in the dielectric cylinder which should be dissipated as quickly as possible.

Der Erfindung liegt nun die Aufgabe zugrunde, einen dielektrischen Resonator der eingangs genannten Art anzugeben, der eine möglichst gute Wärmeableitung für den dielektrischen Körper gewährleistet und dessen Güte durch die Wärmeableitungsmaßnahmen möglichst wenig beeinträchtigt wird.The invention is based on the object of specifying a dielectric resonator of the type mentioned at the outset which ensures the best possible heat dissipation for the dielectric body and the quality of which is impaired as little as possible by the heat dissipation measures.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausbildungen der Erfindung gehen aus den Unteransprüchen hervor.According to the invention, this object is achieved by the features of claim 1. Advantageous developments of the invention emerge from the subclaims.

Der bzw. die nach der Erfindung vorgesehenen Metallstäbe gewährleisten nicht nur eine gute Wärmeableitung, sondern stellen auch eine mit sehr geringem Aufwand realisierbare Halterung für den dielektrischen Körper dar.The metal rod (s) provided according to the invention not only ensure good heat dissipation, but also represent a holder for the dielectric body that can be implemented with very little effort.

Anhand einiger in der Zeichnung dargestellter Ausführungsbeispiele wird nachfolgend die Erfindung näher erläutert. Es zeigen

  • Fig. 1 einen Resonator mit in Richtung der Längsachse des dielektrischen Zylinders orientierten Metallstäben,
  • Fig. 2 und 3 zwei Varianten für die Verbindung eines Metallstabes mit dem dielektrischen Zylinder,
  • Fig. 4 einen Resonator mit senkrecht zur Längsachse des dielektrischen Zylinders orientierten Metallstäben und
  • Fig. 5, 6, 7 drei Varianten für die Verbindung senkrecht zur Zylinderlängsachse orientierter Metallstäbe mit dem dielektrischen Zylinder.
The invention is explained in more detail below with the aid of a few exemplary embodiments shown in the drawing. Show it
  • 1 shows a resonator with metal rods oriented in the direction of the longitudinal axis of the dielectric cylinder,
  • 2 and 3 two variants for the connection of a metal rod with the dielectric cylinder,
  • 4 shows a resonator with metal rods oriented perpendicular to the longitudinal axis of the dielectric cylinder and
  • 5, 6, 7 three variants for the connection of metal rods oriented perpendicular to the longitudinal axis of the cylinder with the dielectric cylinder.

In der Fig. 1 ist ein dielektrischer Resonator dargestellt mit einem in einem Gehäuse 1 angeordneten dielektrischen Körper in Form eines Zylinders 2. Bei diesem Ausführungsbeispiel sind das Gehäuse 1 und der dielektrische Zylinder 2 kreisförmig. Die Kreisform ist aber für die Funktion des Resonators nicht bindend, so sind z.B. auch rechteckige, dreieckige, elliptische etc. dielektrische Zylinder in z.B. runde, rechteckige, elliptische etc. Gehäuse einsetzbar.1 shows a dielectric resonator with a dielectric body in the form of a cylinder 2 arranged in a housing 1. In this exemplary embodiment, the housing 1 and the dielectric cylinder 2 are circular. However, the circular shape is not binding for the function of the resonator, e.g. also rectangular, triangular, elliptical etc. dielectric cylinders in e.g. round, rectangular, elliptical etc. housing can be used.

Zur Fixierung des dielektrischen Zylinders 2 in dem Gehäuse 1 sind vier Metallstäbe 3 vorgesehen, welche den dielektrischen Zylinder 2 in der Richtung seiner Längsachse vollständig durchdringen und mit ihm verbunden sind. Die Enden der Metallstäbe 3 sind an einander gegenüberliegenden Wänden des Gehäuses 1 befestigt. Damit in den Metallstäben 3 möglichst wenig Strom induziert wird, d.h. die Resonatorgüte möglichst wenig beeinflußt wird, sind die Metallstäbe 3 so plaziert, daß sie nahezu orthogonal zu dem elektrischen und magnetischen Feldlinien des Resonators orientiert sind. Bei einem TE01δ Resonatorwellentyp ist das der Fall, wo das elektrische Feld ein Maximum hat. Unter den genannten Bedingungen können also ohne nennenswerte Einbuße an Resonatorgüte Stäbe aus Metall verwendet werden, welche in der Lage sind, große Wärmemengen aus dem dielektrischen Zylinder 2 rasch abzuführen.To fix the dielectric cylinder 2 in the housing 1, four metal rods 3 are provided, which completely penetrate the dielectric cylinder 2 in the direction of its longitudinal axis and are connected to it. The ends of the metal bars 3 are attached to opposite walls of the housing 1. So that as little current as possible is induced in the metal rods 3, ie the resonator quality is influenced as little as possible, the metal rods 3 are placed in such a way that they are almost orthogonal to the electrical and magnetic ones Field lines of the resonator are oriented. This is the case with a TE01δ resonator wave type where the electric field has a maximum. Under the conditions mentioned, rods made of metal, which are able to rapidly dissipate large amounts of heat from the dielectric cylinder 2, can be used without any significant loss of resonator quality.

Die Zahl der Stäbe wird durch die Anforderung an die Fixierung des dielektrischen Zylinders 2 und die abzuleitende Wärmemenge vorgegeben.The number of rods is specified by the requirement for the fixing of the dielectric cylinder 2 and the amount of heat to be dissipated.

Abweichend von dem in Figur 1 dargestellten Ausführungsbeispiel, bei dem jeder Metallstab 3 vollständig durch den dielektrischen Zylinder 2 hindurchgeführt ist, zeigen die Figuren 2 und 3 am Beispiel eines Metallstabes 4, 5 zwei weitere Varianten für die Halterung des dielektrischen Zylinders 2. Gemäß Figur 2 dringt ein Metallstab 4, der mit einem Ende an einer Wand des Gehäuses 1 befestigt ist, mit seinem anderen Ende nur teilweise in dem dielektrischen Zylinder 2 ein. Gemäß Figur 3 ist ein Metallstab 5 mit einem Ende an einer Wand des Gehäuses 1 befestigt und mit seinem anderen Ende an dem dielektrischen Zylinder 2, ohne in diesen einzudringen. Natürlich bieten solche Halterungen die beste Wärmeableitung, bei denen die Metallstäbe die größte Berührungsfläche mit dem dielektrischen Körper 2 aufweisen.In a departure from the exemplary embodiment shown in FIG. 1, in which each metal rod 3 is guided completely through the dielectric cylinder 2, FIGS. 2 and 3 show two further variants for holding the dielectric cylinder 2 using the example of a metal rod 4, 5. According to FIG. 2 a metal rod 4, which is fastened at one end to a wall of the housing 1, only partially penetrates into the dielectric cylinder 2 at its other end. According to FIG. 3, a metal rod 5 is attached at one end to a wall of the housing 1 and at the other end to the dielectric cylinder 2 without penetrating into it. Of course, such holders offer the best heat dissipation, in which the metal rods have the largest contact area with the dielectric body 2.

Bei dem in Figur 4 gezeigten Ausführungsbeispiel eines dielektrischen Resonators wird der dielektrische Zylinder 2 von einem ihn orthogonal zu seiner Längsachse vollständig durchdringenden Metallstab 6, der mit seinen beiden Enden an gegenüberliegenden Wandseiten des Gehäuses 1 befestigt ist, gehalten. Bei dieser Orientierung des Metallstabes 6 ist die bereits oben genannte Bedingung, daß die elektrischen und magnetischen Feldlinien nahezu orthogonal zu dem Metallstab 6 verlaufen, ebenfalls erfüllt. Der Metallstab 6 bewirkt auch hier wiederum eine gute Wärmeableitung aus dem dielektrischen Zylinder 2, ohne daß er die Resonatorgüte wesentlich beeinflußt. In der Figur 5 ist die soeben beschriebene Halterung des dielektrischen Zylinders mittels eines ihn vollständig durchdringenden Metallstabes 6 nochmals in einer Querschnittsdarstellung gezeigt.In the exemplary embodiment of a dielectric resonator shown in FIG. 4, the dielectric cylinder 2 is held by a metal rod 6 which completely penetrates it orthogonally to its longitudinal axis and is fastened with its two ends to opposite wall sides of the housing 1. With this orientation of the metal rod 6, the condition already mentioned above that the electrical and magnetic field lines run almost orthogonally to the metal rod 6 is also fulfilled. The metal rod 6 also causes here again good heat dissipation from the dielectric cylinder 2, without it having a significant influence on the resonator quality. FIG. 5 shows the mounting of the dielectric cylinder just described by means of a metal rod 6 that completely penetrates it, in a cross-sectional representation.

Wie der Figur 6 zu entnehmen ist, kann der durchgehende Metallstab 6 auch durch zwei diametral einander gegenüberstehende Metallstäbe 7 und 8 ersetzt werden, die von beiden Seiten her nur teilweise in den dielektrischen Zylinder 2 eindringen und mit diesem befestigt sind.As can be seen in FIG. 6, the continuous metal rod 6 can also be replaced by two diametrically opposed metal rods 7 and 8, which only partially penetrate into the dielectric cylinder 2 from both sides and are fastened to the latter.

Auch können mehr als zwei Metallstäbe, die von mehreren Seiten her teilweise in den dielektrischen Zylinder eindringen, vorgesehen werden.It is also possible to provide more than two metal rods which partially penetrate into the dielectric cylinder from several sides.

Statt den bzw. die Metallstäbe in den dielektrischen Körper eindringen zu lassen, reicht es für die Wärmeableitung und/oder Halterung des dielektrischen Zylinders u.U. aus, diesen nur auf den Metallstab (bzw. die Metallstäbe) aufzulegen.Instead of letting the metal rod or rods penetrate into the dielectric body, it may be sufficient for heat dissipation and / or retention of the dielectric cylinder. place it only on the metal rod (or metal rods).

Eine besonders gute Wärmeableitung läßt sich dadurch erzielen, daß die Metallstäbe 7 und 8 jeweils mit einem weiteren orthogonal dazu in dem dielektrischen Zylinder 2 angeordneten Metallstab 9 bzw. 10 kontaktiert sind (vgl. Fig. 7).A particularly good heat dissipation can be achieved in that the metal rods 7 and 8 are each contacted with a further metal rod 9 or 10 arranged orthogonally thereto in the dielectric cylinder 2 (cf. FIG. 7).

Auch bei den in den Figuren 4 bis 7 dargestellten Ausführungsbeispielen hängt die Zahl der verwendeten Metallstäbe von den Anforderungen an die Fixierung und die Wärmeableitung ab.In the exemplary embodiments illustrated in FIGS. 4 to 7, too, the number of metal rods used depends on the requirements for the fixation and the heat dissipation.

Verwendet man hohle Metallstäbe, durch die eine Kühlflüssigkeit oder ein Kühlgas geleitet wird, so läßt sich die Wärmeableitung noch erheblich steigern.If hollow metal rods are used through which a cooling liquid or a cooling gas is passed, the heat dissipation can be increased considerably.

Der dielektrische Körper, welcher in den oben beschriebenen Ausführungsbeispielen als Zylinder dargestellt ist, kann aus mehreren Bereichen mit unterschiedlichen Materialeigenschaften bestehen. So kann z.B. mindenstens ein Bereich vorgesehen sein, der eine gute Wärmeübertragung vom dielektrischen Körper in den Metallstab (bzw. Metallstäbe) gewährleistet.The dielectric body, which is represented as a cylinder in the exemplary embodiments described above, can consist of several regions with different material properties. For example, at least one area can be provided which ensures good heat transfer from the dielectric body into the metal rod (or metal rods).

Claims (7)

Dielektrischer Resonator, welcher einen in einem Gehäuse angeordneten dielektrischen Körper aufweist, der in dem Gehäuse fixiert ist, dadurch gekennzeichnet, daß mindestens ein einerseits mit dem dielektrischen Körper (2) und andererseits mit dem Gehäuse (1) verbundener Metallstab (3, 4, 5, 6, 7, 8) vorhanden ist, der so durch den Innenraum des Gehäuses (1) geführt ist, daß er zu den magnetischen und elektrischen Feldlinien möglichst orthogonal ausgerichtet ist.Dielectric resonator which has a dielectric body arranged in a housing and which is fixed in the housing, characterized in that at least one metal rod (3, 4, 5 connected to the dielectric body (2) on the one hand and to the housing (1) on the other hand , 6, 7, 8) is present, which is guided through the interior of the housing (1) in such a way that it is aligned as orthogonally as possible with respect to the magnetic and electrical field lines. Dielektrischer Resonator nach Anspruch 1, dadurch gekennzeichnet, daß der Metallstab (3, 6) den dielektrischen Körper (2) vollständig durchdringt.Dielectric resonator according to claim 1, characterized in that the metal rod (3, 6) completely penetrates the dielectric body (2). Dielektrischer Resonator nach Anspruch 1, dadurch gekennzeichnet, daß der Metallstab (4, 7, 8) teilweise in den dielektrischen Körper (2) eindringt.Dielectric resonator according to claim 1, characterized in that the metal rod (4, 7, 8) partially penetrates into the dielectric body (2). Dielektrischer Resonator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Metallstab (3, 4, 5) parallel zur Längsachse des dielektrischen Körper (2) verläuft.Dielectric resonator according to one of the preceding claims, characterized in that the metal rod (3, 4, 5) runs parallel to the longitudinal axis of the dielectric body (2). Dielektrischer Resonator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Metallstab (6, 7, 8) senkrecht zur Längsachse des dielektrischen Körper (2) verläuft.Dielectric resonator according to one of Claims 1 to 3, characterized in that the metal rod (6, 7, 8) runs perpendicular to the longitudinal axis of the dielectric body (2). Dielektrischer Resonator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Metallstab (3, 4, 5, 6, 7, 8) hohl ist, damit durch ihn eine Kühlflüssigkeit oder ein Kühlgas geleitet werden kann.Dielectric resonator according to one of the preceding claims, characterized in that the metal rod (3, 4, 5, 6, 7, 8) is hollow so that a cooling liquid or a cooling gas can be passed through it. Dielektrischer Resonator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der dielektrische Körper aus mehreren Bereichen mit unterschiedlichen Materialeigenschaften besteht.Dielectric resonator according to one of the preceding claims, characterized in that the dielectric Body consists of several areas with different material properties.
EP93118717A 1992-12-05 1993-11-22 Dielectric resonator Ceased EP0601371A1 (en)

Applications Claiming Priority (2)

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DE4241026 1992-12-05
DE19924241026 DE4241026C2 (en) 1992-12-05 1992-12-05 Dielectric resonator

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EP0601371A1 true EP0601371A1 (en) 1994-06-15

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EP93118717A Ceased EP0601371A1 (en) 1992-12-05 1993-11-22 Dielectric resonator

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307355A (en) * 1995-11-17 1997-05-21 Pyronix Ltd Dielectric resonator
WO1999044393A1 (en) * 1998-02-27 1999-09-02 Standard Products Industriel Method and device for microwave heating of a material

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US4271399A (en) * 1978-04-24 1981-06-02 Nippon Electric Co., Ltd. Dielectric resonator for VHF to microwave region
JPS56165402A (en) * 1980-05-23 1981-12-19 Nec Corp Dielectric resonator
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JPS6272204A (en) * 1985-09-25 1987-04-02 Mitsubishi Electric Corp Dielectrid resonator
EP0465059A1 (en) * 1990-06-22 1992-01-08 NGK Spark Plug Co. Ltd. Dielectric resonator device

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JPS56165402A (en) * 1980-05-23 1981-12-19 Nec Corp Dielectric resonator
JPS59176905A (en) * 1983-03-26 1984-10-06 Fujitsu Ltd Dielectric resonator
JPS61212101A (en) * 1985-03-15 1986-09-20 Murata Mfg Co Ltd Dielectric resonator
JPS6272204A (en) * 1985-09-25 1987-04-02 Mitsubishi Electric Corp Dielectrid resonator
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307355A (en) * 1995-11-17 1997-05-21 Pyronix Ltd Dielectric resonator
WO1999044393A1 (en) * 1998-02-27 1999-09-02 Standard Products Industriel Method and device for microwave heating of a material

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DE4241026C2 (en) 1995-04-27
DE4241026A1 (en) 1994-06-09

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