WO2012162948A1 - Ensemble filtre hyperfréquence à cavité et procédé de fabrication d'un ensemble filtre hyperfréquence à cavité - Google Patents

Ensemble filtre hyperfréquence à cavité et procédé de fabrication d'un ensemble filtre hyperfréquence à cavité Download PDF

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Publication number
WO2012162948A1
WO2012162948A1 PCT/CN2011/078486 CN2011078486W WO2012162948A1 WO 2012162948 A1 WO2012162948 A1 WO 2012162948A1 CN 2011078486 W CN2011078486 W CN 2011078486W WO 2012162948 A1 WO2012162948 A1 WO 2012162948A1
Authority
WO
WIPO (PCT)
Prior art keywords
pedestal
stub portion
dielectric body
deformation
hollow
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
PCT/CN2011/078486
Other languages
English (en)
Inventor
Johnny Hederoth
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.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies 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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2011/078486 priority Critical patent/WO2012162948A1/fr
Publication of WO2012162948A1 publication Critical patent/WO2012162948A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
    • 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

  • a cavity microwave filter assembly and a method for mak ⁇ ing a cavity microwave filter assembly
  • the invention relates to a cavity microwave filter assem ⁇ bly and to a method of making a cavity microwave filter assembly .
  • the present invention relates to a cavity microwave fil ⁇ ter assembly for filtering an electromagnetic wave, in ⁇ cluding an input connection for receiving input electro- magnetic energy, an output connection for providing output filtered electromagnetic energy, and at least one cavity with a base supporting a dielectric resonator, the dielectric resonator comprising i) a dielectric body, commonly known as a A top hat' , with a tubular stub por- tion having an internal thread and ii) a pedestal with a first end, an opposite second end and a hollow, the ped ⁇ estal being mounted to the base at the second end.
  • the dielectric body is secured to the pedestal, resting on the pedestal with the stub portion received in the hollow of the pedestal.
  • a central passage extends through the dielectric body and the pedestal, and a tuning screw for creating a desired response of the assembly to the input electromagnetic energy extends through the central pas ⁇ sage engaging the internal thread.
  • Examples of cavity microwave filter assemblies are dis ⁇ closed in US patents no. 3 737 816 and 7 764 146.
  • Prior art dielectric bodies are constructed with the ped- estal having an inner thread matching an outer thread formed on the outer face of the tubular stub portion of the dielectric body. This requires a machining of the various parts at high costs and also leads to the need for long tuning screws which adds to the dimensions of the assembly.
  • the stub portion includes a radially outwardly bulging annu ⁇ lar deformation, the pedestal including a radially inwardly directed flange delimiting the hollow at the first end, a lock for locking the dielectric body to the pedes- tal comprising a face of the flange facing the base coop ⁇ erating with the annular deformation of the stub portion.
  • the filter assembly may be formed by a method involving the steps of providing a di- electric body that has a stub portion with an annular de ⁇ formation zone adapted for creating an outwardly bulging annular portion by deformation, inserting the stub portion into the hollow of the pedestal, maintaining the di ⁇ electric body resting against an inwardly directed flange of the pedestal, applying a compressive force onto the stub portion to deform the deformation zone of the stub portion at a the radially inwardly directed flange of the pedestal, thereby establishing the outwardly bulging an ⁇ nular deformation.
  • kits for making the cavity microwave filter assembly including a housing having said at least one cavity and a base, a resonator body, and a ped ⁇ estal which includes the radially inwardly directed flange at a first end thereof, the stub portion of said resonator body being an elongated tubular body having an inner thread, a substantially smooth outer surface and an annular deformation zone adapted to provide for an out- wardly bulging annular portion by deformation through a compressive force applied in a longitudinal direction of the stub portion.
  • Fig. la is a perspective view seen from below of a tele- communications device with a cavity microwave filter as ⁇ sembly
  • Fig. lb is an exploded view of the device of fig. la, showing the filter assembly
  • Fig. lc is a perspective view of the bottom part of the filter assembly.
  • Fig. 2 - 5 show steps performed in the making of a di- electric resonator used in the assembly.
  • Fig. la is a perspective view of a telecommunications de ⁇ vice 300 used i.a. for filtering an electromagnetic wave and including a microwave filter assembly 1 as well as a heat sink 150.
  • the device 300 is shown in an exploded perspective view in fig. lb, showing a top part 1' and a bottom part 1" of the filter assembly 1.
  • An input probe or connection 2 is configured for receiving input electromagnetic energy and an output probe or connection 3 is configured for providing output filtered electromagnetic energy.
  • Fig. lc shows the bottom part 1" in a perspective view.
  • the bottom part has a base 5 supporting walls 4', 4" de ⁇ fining a plurality of cavities 4.
  • Dielectric resonators 10 often referred to as A top hats' and comprising a di ⁇ electric body 15 on a pedestal 30 are mounted on the base 5 in the cavities 4.
  • a tuning screw 40 which may eg. be of aluminium or PEI (Polyether Imide) extends through each resonator 10.
  • the base 5 has several through-going apertures 6, as shown in fig. la, at the location of each pedestal 30.
  • the apertures 6 provide access openings for insertion into the filter assembly 1 of a tool, such as a screw driver mounted on a robot arm (not shown) , for adjusting the position of the tuning screws 40 by engaging the lower end (not shown) of the tuning screws 40.
  • a tool such as a screw driver mounted on a robot arm (not shown)
  • the position of a head portion 40' of each screw 40 relative to the top part 1' can be varied in or- der to tune the filter assembly 1.
  • Fig. 2 is a cross-sectional view through the dielectric resonator 10 which includes the dielectric body 15 and the pedestal 30.
  • the dielectric body 15 which may eg. be of low carbon steel, has a head portion 17 and a tubular stub portion 20 with an internal thread 21 (not shown) .
  • the tubular stub portion 20 extends from the head portion 17 of the dielectric body 15 into the pedestal 30 to which it is secured.
  • the pedestal 30 has a first end 31 and an opposite second end 32 with a flange.
  • the pedestal 30 is mounted to the base 5 at the second end 32, and has a hollow 35. As shown, an annular space 13 is formed be ⁇ tween the stub portion 20 and the pedestal 30.
  • an abutment face 16 of the di ⁇ electric body 15 rests directly or indirectly against the pedestal 30 with the stub portion 20 received in the hol ⁇ low, and the stub portion 20 includes a radially out ⁇ wardly bulging annular deformation 22.
  • the pedestal 30 on the other hand includes a radially inwardly directed flange 33 that delimits the hollow 35 at the first end 31.
  • a central passage 12 extends through the dielectric body 15 and the pedestal 30 and has the tuning screw 40 used for creating the desired response of the assembly 1 to the input electromagnetic energy.
  • the screw 40 extends through the central passage 12, engaging the internal thread 21 of the stub portion 20.
  • a lock holds the dielectric body 15 securely to the pedestal 30 in that a face 34 of the pedestal flange 33 facing the base 5 cooperates with the annular deformation 22 of the stub portion 20.
  • FIGs. 3, 4 and 5 show method steps followed in establish- ing the aforementioned lock.
  • a dielectric body 15 with an internally threaded stub portion 20 formed with an easily deformed annular deformation zone 22' is first provided.
  • the internal thread 21 may be formed only on the part of the stub portion 20 below the deformation zone 22' .
  • the stub portion 20 is inserted into the hollow 35, and the dielectric body 15 is maintained resting against the flange 33 of the pedestal 30 using a suitable fixture (not shown) .
  • a compressive force is applied onto the stub portion 20 to deform the stub portion 20 in the deformation zone 22' at the flange 33, thereby establish ⁇ ing the outwardly bulging annular deformation 22 which effectively clamps the pedestal flange 33 between the de ⁇ formation 22 and the abutment face 16 of the head portion 17 that rests against the pedestal 30.
  • the deformation of the deformation zone 22' is provided as shown in fig. 4 by inserting into the head portion 17 a tool 100, placing a threaded rotatable head portion 105 of the tool 100 into engagement with the thread 21 of the stub portion 20, as shown in fig. 4, and rotating the rotatable head portion 105 of the tool 100 further to provide the compressive force that draws the tip of the stub portion 20 towards the abutment face 16, as shown in fig. 4.

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Abstract

La présente invention concerne un ensemble filtre hyperfréquence à cavité pour le filtrage d'une onde électromagnétique, comprenant une connexion d'entrée destinée à recevoir une énergie électromagnétique d'entrée, une connexion de sortie destinée à fournir une énergie électromagnétique filtrée de sortie, et au moins une cavité dotée d'une base supportant un résonateur diélectrique, le résonateur diélectrique comprenant i) un corps diélectrique, généralement connu sous le nom de « haut-de-forme », doté d'une partie formant colonne tubulaire ayant un filetage interne et ii) un socle doté d'une première extrémité, d'une seconde extrémité opposée et d'un creux, le socle étant monté sur la base au niveau de la seconde extrémité. Le corps diélectrique est fixé sur le socle, reposant sur le socle avec la partie formant colonne placée dans le creux du socle. Un passage central s'étend à travers le corps diélectrique et le socle, et une vis de réglage destinée à créer une réponse souhaitée de l'ensemble à l'énergie électromagnétique d'entrée s'étend à travers le passage central, se mettant en prise avec le filetage interne. La partie formant colonne comprend une déformation annulaire qui est bombée radialement vers l'extérieur, le socle comprenant un rebord dirigé radialement vers l'intérieur délimitant le creux au niveau de la première extrémité, un verrou pour verrouiller le corps diélectrique sur le socle comprenant une face du rebord orientée vers la base coopérant avec la déformation annulaire de la partie formant colonne.
PCT/CN2011/078486 2011-08-16 2011-08-16 Ensemble filtre hyperfréquence à cavité et procédé de fabrication d'un ensemble filtre hyperfréquence à cavité Ceased WO2012162948A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/078486 WO2012162948A1 (fr) 2011-08-16 2011-08-16 Ensemble filtre hyperfréquence à cavité et procédé de fabrication d'un ensemble filtre hyperfréquence à cavité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/078486 WO2012162948A1 (fr) 2011-08-16 2011-08-16 Ensemble filtre hyperfréquence à cavité et procédé de fabrication d'un ensemble filtre hyperfréquence à cavité

Publications (1)

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WO2012162948A1 true WO2012162948A1 (fr) 2012-12-06

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PCT/CN2011/078486 Ceased WO2012162948A1 (fr) 2011-08-16 2011-08-16 Ensemble filtre hyperfréquence à cavité et procédé de fabrication d'un ensemble filtre hyperfréquence à cavité

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016171380A1 (fr) * 2015-04-20 2016-10-27 주식회사 케이엠더블유 Filtre à radiofréquence ayant une structure de cavité
WO2021134425A1 (fr) * 2019-12-31 2021-07-08 深圳市大富科技股份有限公司 Filtre à cavité et dispositif de communication

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1330801A (zh) * 1998-12-18 2002-01-09 艾利森电话股份有限公司 与接触接点有关的紧固件装置
JP2005223665A (ja) * 2004-02-06 2005-08-18 Tamagawa Electronics Co Ltd 誘電体共振器及びフィルタ装置
CN201181730Y (zh) * 2008-04-15 2009-01-14 华南理工大学 可控电磁混合耦合同轴腔滤波器
CN101546853A (zh) * 2009-04-29 2009-09-30 上海华为技术有限公司 一种压铸双工器及压铸方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1330801A (zh) * 1998-12-18 2002-01-09 艾利森电话股份有限公司 与接触接点有关的紧固件装置
JP2005223665A (ja) * 2004-02-06 2005-08-18 Tamagawa Electronics Co Ltd 誘電体共振器及びフィルタ装置
CN201181730Y (zh) * 2008-04-15 2009-01-14 华南理工大学 可控电磁混合耦合同轴腔滤波器
CN101546853A (zh) * 2009-04-29 2009-09-30 上海华为技术有限公司 一种压铸双工器及压铸方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016171380A1 (fr) * 2015-04-20 2016-10-27 주식회사 케이엠더블유 Filtre à radiofréquence ayant une structure de cavité
US10418677B2 (en) 2015-04-20 2019-09-17 Kmw Inc. Radio frequency filter having a resonance element with a threaded support and a planar plate including at least two through holes therein
WO2021134425A1 (fr) * 2019-12-31 2021-07-08 深圳市大富科技股份有限公司 Filtre à cavité et dispositif de communication

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