WO2015043300A1 - Filtre diélectrique et son procédé d'assemblage - Google Patents

Filtre diélectrique et son procédé d'assemblage Download PDF

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Publication number
WO2015043300A1
WO2015043300A1 PCT/CN2014/082744 CN2014082744W WO2015043300A1 WO 2015043300 A1 WO2015043300 A1 WO 2015043300A1 CN 2014082744 W CN2014082744 W CN 2014082744W WO 2015043300 A1 WO2015043300 A1 WO 2015043300A1
Authority
WO
WIPO (PCT)
Prior art keywords
dielectric
elastic conductive
metal cavity
conductive gasket
dielectric filter
Prior art date
Application number
PCT/CN2014/082744
Other languages
English (en)
Chinese (zh)
Inventor
卜伟
康玉龙
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2015043300A1 publication Critical patent/WO2015043300A1/fr

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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 the field of filter technologies for mobile communication devices, and in particular, to a dielectric filter and a device method thereof.
  • a dielectric filter When electromagnetic waves propagate in a high dielectric constant material, the wavelength thereof can be shortened.
  • a dielectric material can be used instead of a conventional metal material, and the volume of the filter can be reduced under the same index.
  • Research on dielectric filters has been a hot topic in the communications industry. As an important component of wireless communication products, dielectric filters are of particular importance for the miniaturization of communication products.
  • a TM mode dielectric filter is mainly composed of a dielectric resonator column 103, a sealing cover 102, a tuning screw 101, and a metal cavity 104.
  • the dielectric resonator column 103 is of a hollow cylinder type, and a high electric field distribution exists at the joint portion of the upper and lower surfaces and the metal cavity 104.
  • the upper surface of the dielectric resonator column 103 is in close contact with or suspended from the metal cavity 104, and the lower surface is in a short-circuited state in contact with the metal cavity 104.
  • the surface of the dielectric resonator column 103 in the TM mode dielectric filter is in good contact with the surface of the metal cavity 104.
  • the lower surface of the dielectric resonator column 103 is in contact with the bottom surface of the metal cavity 104, and the upper surface of the dielectric resonator column 103 is in contact with the bottom surface of the sealing cover 102.
  • the sealing cover 102 and the metal cavity 104 are fixed by ordinary mounting screws. The force is applied to ensure that the upper and lower surfaces of the dielectric resonator column 103 are tightly pressed against the bottom surfaces of the sealing cover 102 and the metal cavity 104, respectively, and are in full contact with each other to form a closed cavity.
  • the dielectric resonator column 103 and the metal cavity 104 need to be tightly coupled to ensure the continuity of the impedance, when the temperature is expanded or contracted by the temperature, the linear expansion coefficients of the dielectric resonator column 103 and the metal cavity 104 are greatly different and two The hardness of the material is high and the elasticity is poor, and a large shear force is generated to easily damage the tightness of the original combination, which may result in deterioration of the performance of the dielectric filter, or even physical damage.
  • the technical problem to be solved by the embodiments of the present invention is how to realize a medium resonant column and a metal cavity of a dielectric filter capable of releasing stress and achieving good contact under the condition of high and low temperature changes in the environment.
  • an embodiment of the present invention provides a dielectric filter, including: a dielectric resonator column, a metal cavity, a sealing cover, and a tuning screw, wherein the dielectric resonator column is located in a closed portion composed of a sealing cover plate and a metal cavity a tuning screw is mounted on the sealing cover, the dielectric filter further includes an elastic conductive gasket, and a bottom surface of the metal cavity is provided with a card slot matching the lower surface of the dielectric resonator column; A gasket is located at the bottom of the card slot, and the dielectric resonator column is assembled in the card slot.
  • the depth of the card slot is at least guaranteed to limit the dielectric resonator column.
  • the elastic conductive gasket has one surface flat and the other surface has an elastic protrusion, and the flat surface is in contact with the lower surface of the metal cavity, and the elastic convex surface is in contact with the dielectric resonator column.
  • the elastic projections are uniformly arranged zigzag protrusions; the size of the elastic conductive gasket matches the size of the card slot.
  • the elastic conductive gasket is tightly coupled to the dielectric resonator column by a crimping method.
  • the elastic conductive gasket is fixed in the card slot by fixing or fixing by threading or by an interference fit.
  • the dielectric resonator column is a dielectric resonator column which is silver plated on at least the lower surface.
  • the elastic conductive gasket is an elastic conductive gasket made of copper or a silicone rubber filled with conductive particles.
  • An embodiment of the present invention further provides a method for assembling a dielectric filter, including:
  • the dielectric resonator column is a dielectric resonator column which is silver plated on at least the lower surface.
  • the elastic conductive gasket is an elastic conductive gasket made of copper or a silicone rubber filled with conductive particles.
  • FIG. 1 is a schematic diagram of a related art mode dielectric filter
  • FIG. 2 is a schematic structural diagram of a dielectric filter according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of an elastic conductive gasket inside a dielectric filter according to an embodiment of the present invention.
  • a dielectric filter includes the following components: a dielectric resonator column 103, a metal cavity 204, a sealing cover 102, a tuning screw 101, and an elastic conductive gasket 205, wherein the medium
  • the resonant column 103 is located inside the closed space composed of the sealing cover 102 and the metal cavity 204.
  • the closed space is a resonant cavity, and the sealing cover 102 is mounted with a tuning screw 101 for adjusting the resonant frequency.
  • the bottom surface of the metal cavity 204 is provided with a card slot matching the lower surface of the dielectric resonator column 103; the elastic conductive gasket 205 is located at the bottom of the card slot, and the dielectric resonator column 103 is assembled in the card slot; when the sealing cover 102 is fixed to the metal cavity After the body 204 is applied downward, the dielectric resonator column 103 is applied downward to the elastic conductive gasket 205, so that the lower surface of the dielectric resonator column 103 is in close contact with the elastic conductive gasket and the dielectric resonator column 103 is fixed. .
  • the depth of the card slot is at least guaranteed to limit the dielectric resonator column 103.
  • Figure 3 shows a schematic view of the structure of the elastic conductive gasket, wherein the elastic conductive gasket is flat on one side and has elastic projections on the other side.
  • 301 is a flat surface of the elastic conductive gasket
  • 302 is a resiliently convex side of the elastic conductive gasket
  • 303 is a hollow region between the convex and the entire surface.
  • the elastic projections are zigzag, or trapezoidal, or other shapes, which may be evenly arranged or non-uniformly arranged.
  • the dielectric resonator When the dielectric resonator is crimped downward, the first end of the elastic protrusion is contacted, and the convex end is rebounded downward.
  • the contact surface will A void is generated, at which time the elastic protrusion relaxes, and the gap can be filled, so that the dielectric resonator column and the metal cavity remain in good contact, thereby ensuring continuity of the impedance; when the dielectric resonator column and the metal cavity material expand due to temperature rise
  • the elastic protrusions When pressed together, the elastic protrusions are further contracted, thereby buffering the stress on the contact faces of the two materials and improving the reliability of the filter.
  • the size of the resilient conductive gasket 205 matches the size of the card slot to ensure the accuracy of the placement of the resilient conductive gasket.
  • the elastic conductive gasket 205 is fixed in the card slot, and may be fixed by means of adhesive fixing, threaded snapping, interference fit fixing or other suitable fixing means.
  • the assembly steps can be carried out according to the following process:
  • the dielectric resonator column 103 may be a dielectric resonator column having a silver plating treatment on at least the lower surface.
  • the elastic conductive gasket 205 may be an elastic conductive gasket made of copper or a silicone rubber filled with conductive particles, but is not limited to these two materials.
  • the dielectric resonator provided by the embodiment of the invention has the advantages of ensuring reasonable release of the stress generated by the dielectric resonator due to temperature change in the case of environmental temperature change, thereby improving the reliability of the filter without affecting the filter performance.
  • the entire assembly operation is simple in production process and low in cost. It is also possible to compensate for the temperature drift coefficient of the entire filter by adjusting the material temperature expansion coefficient or the sawtooth size of the elastic conductive gasket. For example, when the temperature drift of the filter needs to compensate more to the low frequency, the elastic conductive gasket uses a material having a high linear expansion coefficient; conversely, a material having a low linear expansion coefficient is used.
  • the dielectric filter of the embodiment of the invention can make the dielectric resonator column have good contact with the bottom surface of the metal cavity to ensure the continuity of the impedance; and at the same time, when the ambient temperature changes, the temperature between the dielectric resonator column and the metal cavity is ensured. The stress generated by the change is reasonably released, thereby improving the reliability of the dielectric filter.

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Abstract

L'invention porte sur un filtre diélectrique et sur son procédé d'assemblage. Le filtre diélectrique comprend : des colonnes résonantes diélectriques, une cavité métallique, une plaque de revêtement d'étanchéité et une vis tournante, les colonnes résonantes diélectriques étant situées à l'intérieur d'un espace scellé de manière étanche formé par la plaque de revêtement d'étanchéité et la cavité métallique, et la vis tournante étant montée sur la plaque de revêtement d'étanchéité. Le filtre diélectrique comprend en outre des rondelles conductrices élastiques. Une face inférieure dans la cavité métallique est pourvue des rainures encliquetables appariées à une surface inférieure des colonnes résonantes diélectriques. Les rondelles conductrices élastiques sont situées au niveau de la partie inférieure des rainures encliquetables, et les colonnes résonantes diélectriques sont encastrées dans les rainures encliquetables.
PCT/CN2014/082744 2013-09-25 2014-07-22 Filtre diélectrique et son procédé d'assemblage WO2015043300A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201320619024.6 2013-09-25
CN201320619024.6U CN203721860U (zh) 2013-09-25 2013-09-25 一种介质滤波器

Publications (1)

Publication Number Publication Date
WO2015043300A1 true WO2015043300A1 (fr) 2015-04-02

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Application Number Title Priority Date Filing Date
PCT/CN2014/082744 WO2015043300A1 (fr) 2013-09-25 2014-07-22 Filtre diélectrique et son procédé d'assemblage

Country Status (2)

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CN (1) CN203721860U (fr)
WO (1) WO2015043300A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107146933A (zh) * 2017-04-17 2017-09-08 深圳三星通信技术研究有限公司 一种新型tm模双端介子滤波器结构
JP2020504543A (ja) * 2017-01-05 2020-02-06 中興通訊股▲ふん▼有限公司Ｚｔｅ Ｃｏｒｐｏｒａｔｉｏｎ 減結合アンテナおよびその減結合方法
CN112038734A (zh) * 2020-08-28 2020-12-04 中电科仪器仪表有限公司 一种18GHz柱状负载及单刀十二掷同轴开关

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203721860U (zh) * 2013-09-25 2014-07-16 中兴通讯股份有限公司 一种介质滤波器
CN204029964U (zh) * 2014-08-20 2014-12-17 中兴通讯股份有限公司 一种谐振柱及谐振器
CN106129559A (zh) * 2016-07-08 2016-11-16 广东通宇通讯股份有限公司 一种tm模双端短路滤波器
CN109244612B (zh) * 2018-09-28 2024-03-22 西南应用磁学研究所 一种小型化梳状陶瓷管介质腔体滤波器
CN110061332B (zh) * 2019-05-16 2021-07-09 深圳国人科技股份有限公司 一种腔体滤波器及其谐振柱

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CN201673998U (zh) * 2010-05-26 2010-12-15 浙江巡导科技有限公司 行波式多波束圆极化天线
CN201673986U (zh) * 2010-03-30 2010-12-15 深圳市威富通讯技术有限公司 Tm01模介质滤波器
CN102324617A (zh) * 2011-07-08 2012-01-18 武汉凡谷电子技术股份有限公司 一种两端接地tm模介质谐振器
EP2538487A1 (fr) * 2011-06-24 2012-12-26 CommScope Italy S.r.l. Résonateur diélectrique indépendant de la température
CN203721860U (zh) * 2013-09-25 2014-07-16 中兴通讯股份有限公司 一种介质滤波器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201673986U (zh) * 2010-03-30 2010-12-15 深圳市威富通讯技术有限公司 Tm01模介质滤波器
CN201673998U (zh) * 2010-05-26 2010-12-15 浙江巡导科技有限公司 行波式多波束圆极化天线
EP2538487A1 (fr) * 2011-06-24 2012-12-26 CommScope Italy S.r.l. Résonateur diélectrique indépendant de la température
CN102324617A (zh) * 2011-07-08 2012-01-18 武汉凡谷电子技术股份有限公司 一种两端接地tm模介质谐振器
CN203721860U (zh) * 2013-09-25 2014-07-16 中兴通讯股份有限公司 一种介质滤波器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020504543A (ja) * 2017-01-05 2020-02-06 中興通訊股▲ふん▼有限公司Ｚｔｅ Ｃｏｒｐｏｒａｔｉｏｎ 減結合アンテナおよびその減結合方法
CN107146933A (zh) * 2017-04-17 2017-09-08 深圳三星通信技术研究有限公司 一种新型tm模双端介子滤波器结构
CN112038734A (zh) * 2020-08-28 2020-12-04 中电科仪器仪表有限公司 一种18GHz柱状负载及单刀十二掷同轴开关

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