EP0790661B1 - Dielektrischer Resonator - Google Patents

Dielektrischer Resonator Download PDF

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Publication number
EP0790661B1
EP0790661B1 EP19970200392 EP97200392A EP0790661B1 EP 0790661 B1 EP0790661 B1 EP 0790661B1 EP 19970200392 EP19970200392 EP 19970200392 EP 97200392 A EP97200392 A EP 97200392A EP 0790661 B1 EP0790661 B1 EP 0790661B1
Authority
EP
European Patent Office
Prior art keywords
dielectric resonator
supporting member
hole
mounting
screw
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
EP19970200392
Other languages
English (en)
French (fr)
Other versions
EP0790661A3 (de
EP0790661A2 (de
Inventor
Yasuhiro NGK SPARK PLUG CO. LTD Tsujimura
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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug Co Ltd
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 NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Publication of EP0790661A2 publication Critical patent/EP0790661A2/de
Publication of EP0790661A3 publication Critical patent/EP0790661A3/de
Application granted granted Critical
Publication of EP0790661B1 publication Critical patent/EP0790661B1/de
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
    • H01P7/00—Resonators of the waveguide type
    • H01P7/10—Dielectric resonators

Definitions

  • the present invention relates to a dielectric resonator which may be used as a filter or an oscillator in a high frequency region.
  • Fig. 1 of the accompanying drawings One of conventional dielectric resonators of this type is illustrated in Fig. 1 of the accompanying drawings in which the dielectric resonator A is mounted on a base member B such as a metal casing by an insulating support member C made of alumina or forsterite so as to obtain a desired Q characteristic.
  • the bondings between the dielectric resonator A and the support member C and between the support member C and the base member B are made by means of heat-resisting adhesive layers D and E, respectively.
  • These adhesive layers D and E may be made from a glass grease adhesive or a silica-based inorganic adhesive.
  • the dielectric resonator A is self-heated with the resonance thereof when being operated.
  • the higher the operation frequency is the larger the heat release value in the resonator.
  • the dielectric resonator and the support are constructed as an integral unit made of a dielectric material (see US Patent No. 5,136,270).
  • the dielectric material is expensive and the amount of the dielectric material used is large by one-piece molding in the above configuration, resulting in an expensive dielectric resonator.
  • the shape of the resonator becomes complex, it is necessary to use such means as a rubber press machine for molding with the result of troublesome manufacture.
  • GB-A-1520473 discloses (Fig. 11) a dielectric resonator comprising a resonator body having a central aperture, a supporting member having a central bore, and a bolt for mounting the resonator body and the supporting member on a bottom covering.
  • a dielectric resonator comprising a disk-shaped dielectric resonator body made of dielectric material and having a through hole at the center; a supporting member of resin material for supporting the dielectric resonator body and including a threaded connection portion inserted into the through hole and a leg portion formed continuously with the connection portion and mounted on a mounting base, and a screw fixing member having a threaded portion intended inserted into the through hole of the dielectric resonator body and engaged with the threaded connection portion of the supporting member and a head portion abutted on an upper surface of the dielectric resonator body, whereby holding the dielectric resonator body between the supporting member and the screw fixing member.
  • the supporting member includes a shoulder portion on the upper surface of the leg portion for supporting the under surface of the dielectric resonator body.
  • connection portion of the supporting member may comprise a female threaded cylinder portion projecting upward from the leg portion, and the threaded portion of the screw fixing member may comprise a male screw portion to be engaged with the female threaded cylinder portion of the supporting member.
  • connection portion of the supporting member may comprise a male threaded portion projecting upward from the leg portion
  • threaded portion of the screw fixing member may comprise a female screw portion to be engaged with the male threaded portion of the supporting member
  • the supporting member may include a through hole extending along a longitudial direction through which a mounting screw is inserted for fixing the supporting member on the mounting base.
  • the supporting member may be provided with a hole formed continuously with the through hole for inserting a mounting screw and a collar formed between the through hole and the inserting hole, with which a head portion of the mounting screw is contacted.
  • the supporting member may be fixed on the mounting base by fastening the mounting screw through the inserting hole to the mounting base.
  • the supporting member may be provided with one or more threaded hole on the under surface thereof, and may be fixed on the mounting base by screwing one or more mounting screw through the mounting base into the respective threaded hole.
  • the supporting member may be provided with a flange portion having mounting holes and may be fixed on the mounting base by screwing mounting screws through the respective mounting holes into the mounting base.
  • the assembly work is easy because the dielectric resonator body is fixed on the supporting member only by screwing of the screw fixing piece and the supporting member.
  • the dielectric resonator body and the supporting member are mechanically connected together without using an adhesive, even if the resonator body is self-heated with the resonance thereof, it does not peel off and separate because there is not adhesive layer between the resonator body and the supporting member.
  • the plate-shaped resonator body is made of dielectric material, it is possible to reduce production costs.
  • the supporting member of resin material it can be formed easily by common molding means.
  • the screw fastening means is used for fixing the supporting member on the mounting base as described above, as not only the dielectric resonator body and the supporting member but also the supporting member and the mounting base are mechanically connected together without using an adhesive, even if the resonator body is self-heated with the resonance thereof, it does not peel off by separation between the leg portion of the supporting member and the mounting base.
  • the inserting hole for the mounting screw is formed in the supporting member, the wider exposed area may be obtained and thus a heat radiation effect may be high. Further, by using the mounting screw(s) the connection strength is improved.
  • Fig. 2 illustrates a dielectric resonator according to the first embodiment of the present invention which is fixed to a mounting portion Y of a base member of a metal casing or the like X.
  • the dielectric resonator 1 comprises a disk-shaped dielectric resonator body 2 having a large diameter and a supporting member 3 having a circular cross section of a smaller diameter.
  • the dielectric resonator body 2 is formed of a dielectric material such as TiO 2 or BaO-TiO 2 by press molding and is sintered.
  • a through hole 4 which extends along the longitudinal axis of the dielectric resonator body 2.
  • the outer shape of the dielectric resonator body 2 may be circular or square.
  • the dielectric resonator body 2 is fixed to the supporting member 3 the under surface of which is formed as a fixing surface which is fixed to the top surface or mounting surface of the mounting portion Y of the metal casing X.
  • the supporting member 3 is molded of a resin material such as a fluororesin and has a cylindrical leg portion 5 having a larger outer diameter than the inner diameter of the through hole 4.
  • a female threaded cylinder portion 6 projects upward from the intermediate region of the top surface of the leg portion 5 as a connection portion.
  • the supporting member 3 is provided with a longitudinal hole 7 extending along the center axis thereof and an outer shoulder 8 on the boundary between the leg portion 5 and the cylinder portion 6.
  • This longitudinal hole 7 comprises a threaded hole portion 7a provided on the the inside of the female threaded cylinder portion 6 and provided with a female thread 9, and a hole portion 7b provided on the inside of the leg portion 5 and having an inner diameter smaller than that of the threaded hole portion 7a.
  • the outer diameter of the female threaded cylinder portion 6 is smaller than the inner diameter of the through hole 4 of the dielectric resonator body 2.
  • the threaded hole 7 has a bottom provided with a hole 10 through which a fixing screw 11 is inserted for fixing the supporting member 3 on the the mounting portion Y of the metal casing X. A head of the fixing screw 11 is engaged with the shoulder portion of the bottom around the hole 10.
  • a screw fixing member 12 is screwed into the female threaded cylinder portion 6 from above.
  • This screw fixing member 12 is of a hollow bolt structure and comprises a holding portion 13 which is a hexagonal head portion, a through hole 14 extending in a longitudinal direction at the center and a male screw portion 15 which is intended to be inserted into the female threaded cylinder portion 6 and mated with the female screw 9.
  • the through hole 14 is designed to have substantially the same inner diameter as that of the hole portion 7b.
  • This screw fixing member 12 may be made of a metal material besides a synthetic resin material.
  • the female threaded cylinder portion 6 of the supporting member 3 is inserted into and engaged with the through hole 4.
  • the male screw portion 15 of the screw fixing member 12 is inserted into the threaded hole 7 of the female threaded cylinder portion 6 and turned to be engaged with the female screw 9.
  • the dielectric resonator body 2 is fixed to the supporting member 3 by tightening the portion around the through hole 4 between the shoulder 8 or the top surface of the leg portion 5 of the supporting member 3 and the under surface of the holding portion 13 of the screw fixing member 12.
  • the supporting member 3 is then fixed to the mounting portion Y.
  • This fixing is carried out by inserting the mounting screw 11 through the through hole 14 of the screw fixing member 12 and the longitudinal hole 7, bring the screw head thereof into contact with the stop surface, inserting a male screw portion of the mounting screw 11 into the bottom hole 10, extending it from a through hole Z of the mounting portion Y and fastening it with a nut 16.
  • the mounting screw 11 can be screwed through the through hole 13 formed in the screw fixing member 12.
  • FIGs. 5 and 6 there is illustrated another embodiment of the present invention in which the components corresponding to those in the arrangement shown in Figs. 2, 3 and 4, are given the same reference symbols and their descriptions are omitted.
  • a dielectric resonator 1 comprises a dielectric resonator body 2 and a suppoting member 3A which is provided with a through hole 7 and a stage or shoulder 20 at the outside for receiveing the dielectric resonator body 2.
  • the female threaded cylinder portion 6 of the suppoting member 3A is extended along the through hole 7 so that the female threaded cylinder portion 6 has the same inner diameter as that of leg portion 5.
  • blind screw holes 21 are provided in the under surface of the supporting member 3A.
  • a screw fixing member 12A of a solid bolt structure is used.
  • the screw fixing member 12A is to be screwed into the female threaded cylinder portion 6 of the suppoting member 3A.
  • the supporting member 3A is first fixed to the mounting portion Y of the metal casing X. This fixing is carried out by tightly mating mounting screws 22 with the blind screw holes 21 through the through holes Z of the mounting portion Y from outside.
  • the dielectric resonator body 2 is disposed on the shoulder 20 by inserting the female threaded cylinder portion 6 of the supporting member 3A into the through hole 4, and the male screw portion 15 of the screw fixing member 12A is inserted into the female screw 9 of the female threaded cylinder portion 6 from above the dielectric resonator body 2 and turned to be mated with the female screw 9.
  • the dielectric resonator body 2 is fixed on the the supporting member 3A by retaining the portion of the dielectric resonator body 2 around the through hole 4 between the shoulder 20 of the supporting member 3A and the under surface of the holding portion 13 of the screw fixing member 12A.
  • the female threaded cylinder portion 6 is provided on the supporting member 3 or 3A as a connection portion and the male screw portion 15 is provided on the screw fixing member 12 or 12A.
  • Fig. 7 illustrates a further embodiment of the present invention in which a supporting member 3B is provided with a top surface 30 for receiving the dielectric resonator body 2 and a male screw portion 31 which may be projected from the top surface 30 of the supporting member 3B to form a connection portion.
  • a screw fixing member 12B comprises a head portion 32 and a female threaded cylinder 33 which longitudinally extends from the under surface of the head portion 32 and is intended to be mated with the male screw portion 31 on the supporting member 3B.
  • Fig. 8 illustrates a modified embodiment of the present invention in which a supporting member 3C includes a flange portion 40 formed at a lower portion thereof.
  • the flange portion 40 is provided with a plurality of mounting holes 41 at equal intervals.
  • the mounting holes 41 may be through holes or groove holes which are open sideways to allow mounting screws 42 to be mounted from the side thereof.
  • the mounting screws 42 are inserted into the mounting holes 41 to be screwed into the screw holes Z' formed in the mounting portion Y of the metal casing X.
  • the mounting screw 42 as described above, may inserted into the through hole formed in the mounting portion Y and mated with a nut, not shown, at an inserted end thereof to be fixed to the mounting portion Y.
  • the dielectric resonator according to the present invention may be incorporated into a strip line device or the like.
  • the dielectric resonator may be fixed on the surface of a dielectric substrate serving as a mounting surface by means of the above-described fixing means.
  • the present invention has the following advantages or effects.

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

Claims (7)

  1. Dielektrischer Resonator für einen Filter oder einen Oszillator in einem Hochfrequenzgebiet mit einem aus dielektrischem Material hergestellten scheibenförmigen dielektrischen Resonatorkörper (2), der ein Durchgangsloch (4) in der Mitte und ein Halteelement mit einem Stielbereich (5) zum Halten des dielektrischen Resonatorkörpers (2) auf einer Befestigungsbasis (X) aufweist, dadurch gekennzeichnet, daß das Halteelement (3; 3A; 3B, 3C) aus Harzmaterial hergestellt ist und einen in das Durchgangsloch (4) des dielektrischen Resonatorkörpers (2) eingesetzten Gewindeverbindungsbereich (6; 31), wobei der Stielbereich (5) durchgehend mit dem Verbindungsbereich (6; 31) ausgebildet ist und auf der Befestigungsbasis (X) montiert ist, und einen Schulterbereich (8; 20; 30) zwischen dem Stielbereich (5) und dem Gewindeverbindungsbereich (6; 31) zum Halten der Unterseite des dielektrischen Resonatorkörpers (2) und ein Schraubenbefestigungselement (12; 12A; 12B) zum Befestigen des dielektrischen Resonatorkörpers (2) an dem Halteelement (3; 3A; 3B; 3C), das einen in das Durchgangsloch (4) des dielektrischen Resonatorkörpers (2) eingesetzten und mit dem Gewindeverbindungsbereich (6, 31) des Halteelements (3; 3A; 3B; 3C) in Eingriff stehenden Gewindebereich (15, 33) umfaßt, und einen Kopfbereich (13, 32) aufweist, der zum Halten des dielektrischen Resonatorkörpers (2) zwischen dem Halteelement (3; 3A; 3B; 3C) und dem Kopfbereich (13, 32) auf der Oberseite des dielektrischen Resonatorkörpers (2) ruht.
  2. Dielektrischer Resonator nach Anspruch 1, dadurch gekennzeichnet, daß der Gewindebereich des Halteelements (3; 3A) ein von dem Stielbereich (5) nach oben vorragendes Innengewinde (9) umfaßt und der Gewindebereich des Schraubenbefestigungselements (12; 12A) ein mit dem Innengewinde (9) des Gewindezylinderbereiches (6) des Halteelements (3; 3A) in Eingriff stehendes Außengewinde (15) umfaßt.
  3. Dielektrischer Resonator nach Anspruch 1, dadurch gekennzeichnet, daß der Verbindungsbereich (31) des Halteelements (3B) ein von dem Stielbereich nach oben vorragendes Außengewinde umfaßt und der Gewindebereich des Schraubenbefestigungselements (12B) ein mit dem Außengewinde (31) des Halteelements (3B) in Eingriff stehendes Innengewinde (33) umfaßt.
  4. Dielektrischer Resonator nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Halteelement (3; 3A) mit einem sich entlang einer Längsrichtung erstreckenden Durchgangsloch (7) versehen ist, durch das eine Befestigungsschraube (11) zum Befestigen des Halteelements (3; 3A) auf der Befestigungsbasis (X) eingesetzt ist.
  5. Dielektrischer Resonator nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Halteelement (3; 3A) mit einem zum Einsetzen einer Befestigungsschraube (11) durchgehend mit dem Durchgangsloch (7) ausgebildeten Loch (10) und einem zwischen dem Durchgangsloch (7) und dem Einsetzloch (10) ausgebildeter Bund versehen ist, mit dem ein Kopfbereich der Befestigungsschraube (11) in Kontakt gebracht ist, und durch Befestigen der Befestigungsschraube (11) durch das Einsetzloch (10) an der Befestigungsbasis (X) auf der Befestigungsbasis (X) befestigt ist.
  6. Dielektrischer Resonator nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Unterseite des Halteelements (3A; 3B) mit einem oder mehreren Gewindeloch/-löchern (21) versehen ist und durch Schrauben einer oder mehrerer Befestigungsschraube(n) (22) durch die Befestigungsbasis (X) in das jeweilige Gewindeloch (21) auf der Befestigungsbasis (X) befestigt ist.
  7. Dielektrischer Resonator nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Halteelement (3C) mit einem Flanschbereich (40) mit Befestigungslöchern (41) versehen und durch Schrauben von Befestigungsschrauben (42) durch die jeweiligen Befestigungslöcher (41) in die Befestigungsbasis (X) auf der Befestigungsbasis (X) befestigt ist.
EP19970200392 1996-02-19 1997-02-11 Dielektrischer Resonator Expired - Lifetime EP0790661B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP5683996 1996-02-19
JP56839/96 1996-02-19
JP5683996A JPH09223907A (ja) 1996-02-19 1996-02-19 誘電体共振器

Publications (3)

Publication Number Publication Date
EP0790661A2 EP0790661A2 (de) 1997-08-20
EP0790661A3 EP0790661A3 (de) 1998-03-04
EP0790661B1 true EP0790661B1 (de) 2003-01-02

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ID=13038581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970200392 Expired - Lifetime EP0790661B1 (de) 1996-02-19 1997-02-11 Dielektrischer Resonator

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EP (1) EP0790661B1 (de)
JP (1) JPH09223907A (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010948A1 (en) * 1997-08-25 1999-03-04 Control Devices, Inc. Improved dielectric mounting system
US6323746B1 (en) 1997-08-25 2001-11-27 Control Devices, Inc. Dielectric mounting system
KR101036127B1 (ko) * 2008-06-27 2011-05-23 주식회사 에이스테크놀로지 Ｒｆ 필터의 공진기 제조 방법 및 그 공진기를 구비한 ｒｆ필터
CN101807736B (zh) * 2010-04-12 2013-07-03 深圳市大富科技股份有限公司 腔体滤波器、腔体滤波器盖板及调谐螺钉自锁装置
GB201203196D0 (en) * 2012-02-24 2012-04-11 Radio Design Ltd Filter assembly and method of manufacture thereof
EP2882035B1 (de) * 2012-08-03 2020-04-15 Kuang-chi Innovative Technology Ltd. Harmonischer oszillator und herstellungsverfahren dafür, filtervorrichtung und ausrüstung für elektromagnetische wellen
CN103050760A (zh) 2012-12-10 2013-04-17 中兴通讯股份有限公司 一种介质谐振器及其装配方法、介质滤波器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2538614C3 (de) * 1974-09-06 1979-08-02 Murata Manufacturing Co., Ltd., Nagaokakyo, Kyoto (Japan) Dielektrischer Resonator
JP2509162Y2 (ja) * 1989-08-31 1996-08-28 日本特殊陶業株式会社 誘電体共振器装置

Also Published As

Publication number Publication date
EP0790661A3 (de) 1998-03-04
JPH09223907A (ja) 1997-08-26
EP0790661A2 (de) 1997-08-20

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