WO2013117075A1 - 室内用多腔体滤波器 - Google Patents

室内用多腔体滤波器 Download PDF

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Publication number
WO2013117075A1
WO2013117075A1 PCT/CN2012/078527 CN2012078527W WO2013117075A1 WO 2013117075 A1 WO2013117075 A1 WO 2013117075A1 CN 2012078527 W CN2012078527 W CN 2012078527W WO 2013117075 A1 WO2013117075 A1 WO 2013117075A1
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WO
WIPO (PCT)
Prior art keywords
cavity
metal heat
resonant
heat sink
thermally conductive
Prior art date
Application number
PCT/CN2012/078527
Other languages
English (en)
French (fr)
Inventor
孟庆南
朱晖
胡文伟
Original Assignee
武汉凡谷电子技术股份有限公司
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
Priority claimed from CN2012100268317A external-priority patent/CN102709629A/zh
Priority claimed from CN2012100268209A external-priority patent/CN102544657A/zh
Priority claimed from CN2012100268181A external-priority patent/CN102569957A/zh
Priority claimed from CN2012100268177A external-priority patent/CN102544656A/zh
Priority claimed from CN 201220039239 external-priority patent/CN202454699U/zh
Application filed by 武汉凡谷电子技术股份有限公司 filed Critical 武汉凡谷电子技术股份有限公司
Publication of WO2013117075A1 publication Critical patent/WO2013117075A1/zh

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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
    • H01P7/04—Coaxial resonators
    • 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
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other

Definitions

  • the invention belongs to the technical field of electrical components for the communication industry, and particularly relates to a multi-cavity filter for indoor use. Background technique
  • the cavity filter is usually used to filter the interference signal or the clutter signal in a specific frequency range.
  • the existing cavity filter is generally made of precious metals such as aluminum and copper, which is not only heavy, but also disadvantageous for installation, disassembly and transportation. Moreover, due to the high price of precious metals, the cost of the cavity filter is relatively high. Therefore, each filter manufacturer is investing a lot of energy to continuously develop new technologies and processes to reduce the production cost of the enterprise. Among various cost reduction schemes, the solution of using a plastic material to form a filter cavity is a reasonable solution. Compared with the metal filter cavity, the plastic cavity has a lighter weight and stronger Rigid performance is not susceptible to external temperature changes, and is increasingly valued by various filter manufacturers.
  • the thermal conductivity of plastic is worse than that of metal.
  • the heat accumulated inside the plastic cavity cannot be dissipated in time, which will result in higher local temperature and multi-cavity filter for indoor use.
  • the overall function fails; especially for high-power filters, the inside of the plastic cavity will accumulate more heat in a short time, but it will not be dissipated in time, resulting in a decrease in the electrical performance index of the multi-cavity filter in the room, which cannot meet the work.
  • Demand, in the existing indoor multi-cavity filter the plastic cavity can only be used in a filter with a small frequency, and the filter with a slightly higher power can not adopt the plastic cavity solution to reduce the production cost of the enterprise.
  • the pressure, the heat dissipation problem of the plastic cavity has been seriously restricting the development of the cavity filter. Summary of the invention
  • An object of the present invention is to provide an indoor multi-cavity filter which can solve not only the heat dissipation problem of a plastic filter, but also the production cost of the filter, and which has excellent electrical performance.
  • an indoor multi-cavity filter designed by the present invention includes a cavity and a device a cover plate disposed on the cavity, the cavity is provided with a plurality of resonant cavities, each resonant cavity is mounted with a resonant rod, and the cover plate is mounted with a tuning screw, the cavity is made of plastic material, the cavity a metal heat sink is disposed on the outer surface of the bottom of the body, and the bottom end of each of the resonant rods is connected to the metal heat sink.
  • each of the resonant rods is connected with a metal heat conducting member, and the bottom end of the metal heat conducting member is The metal heat dissipating plate is connected, the resonant rod is integrally formed with the metal heat conducting member, the metal heat conducting member is connected to the metal heat dissipating plate through the bottom surface of the cavity, and the metal heat conducting member is connected to the metal heat dissipating plate through the connecting member, the connection The piece is connected to the metal heat conducting member through the metal heat sink from bottom to top.
  • a ring-shaped annular boss is disposed at a lower end portion of the resonant rod.
  • the metal heat sink is a whole piece.
  • the present invention sets the bottom end of the resonant rod and the plastic cavity.
  • the external metal heat sink is connected, and the metal heat conduction between the bottom end of the resonant rod and the metal heat sink is used to conduct most of the heat inside the plastic cavity to the metal heat sink by the metal thermal conductivity, and is cooled by the metal.
  • the plate is radiated to the space around the outside of the plastic cavity, which effectively reduces the heat accumulated inside the plastic cavity, so that when the plastic cavity is used in the filter, the electrical performance can be maintained well, and the plastic cavity filter can be greatly improved.
  • the power capacity; at the same time, the metal heat conductive member, the metal heat sink, and the resonant rod of the present invention are simple in structure, easy to manufacture, easy to assemble, and greatly reduce the production cost of the filter.
  • Figure 1 is a schematic view of the structure of the present invention
  • FIG. 2 is a schematic structural view of a resonant rod of the present invention
  • the overall solution of the present invention is that a metal heat sink is disposed on the outer surface of the bottom of the cavity, and the resonant rod is The bottom end is connected to the metal heat sink, and the heat inside the plastic cavity is radiated to the outside of the cavity through the large metal heat sink, thereby reducing the temperature inside the plastic cavity.
  • the indoor multi-cavity filter shown in FIG. 1 includes a cavity 1 and a cover plate 2 disposed on the cavity 1.
  • the cavity 1 is provided with a plurality of resonant cavities 3, and each of the resonant cavities 3 is mounted therein.
  • the resonant rod 4, the cover plate 2 and the upper resonant rod 4 are respectively equipped with a tuning screw 5, the resonant rod 4 has a hollow structure, and the tuning screw 5 faces the hollow of the resonant rod 4, and can be deepened by adjusting the tuning screw 5 The depth inside the resonant rod 4 adjusts the operating frequency of the filter.
  • the cavity 1 is made of plastic material
  • the cover plate 2 and the resonant rod 4 and the tuning screw 5 are made of metal material
  • the outer surface of the bottom of the cavity 1 is provided with a metal heat sink 6
  • the bottom end of each resonant rod 3 is metal
  • the heat sink 6 is connected, and the connecting member is connected to the metal heat conducting member 7 through the metal heat sink 6 from the bottom to the top.
  • the bottom end of the resonant rod 4 is connected with a metal heat conducting member 7, and the resonant rod 3 is integrally formed with the metal heat conducting member 7, and the metal heat sink 6 is a whole piece.
  • the outer diameter of the metal heat conducting member 7 is smaller than the resonant rod 3, the junction of the metal heat conducting member 7 and the resonant rod 3 constitutes a step 9, the lower bottom surface of the step 9 is in contact with the upper surface of the bottom surface of the plastic cavity 1, and the metal heat conducting member 7 passes through the cavity.
  • the bottom surface of the body 1 is in contact with the metal heat sink 6.
  • the bottom surface of the cavity 1 is provided with a through hole at a position corresponding to each of the resonant rods 4.
  • the metal heat conductive member 7 is in contact with the metal heat sink 6 through the through hole, and passes through the screw 10.
  • the metal heat sink 4 is connected to and fixed to the metal heat conductor 5 and the resonance rod 4.
  • a ring-shaped annular boss 8 is disposed at a lower end portion of the resonant rod 4, and the lower end of the resonant rod 4 and the upper surface of the bottom portion of the cavity 1 are in contact with each other through the annular boss 8, and the upper surface of the bottom surface of the cavity 1 is not
  • the resonant rod 4 can also be well contacted with the upper surface of the bottom surface of the cavity 1, which reduces the production process requirements of the cavity 1, reduces the production cost, and is particularly suitable for indoor use.
  • each of the resonant rods 4 is connected to the metal heat sink 6 through the metal heat conducting member 7, and the metal heat sink 6 has a large area and fast heat dissipation, which is good. Lower the temperature inside the plastic chamber.
  • the metal heat dissipating plate 4 and the metal heat conducting member 5 of the present invention can be made of an aluminum material having a good thermal conductivity.
  • the details not described in detail in the present specification are prior art known to those skilled in the art.

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

Abstract

一种室内用多腔体滤波器，包括腔体（1）、设置在腔体上的盖板（2），所述腔体内设有多个谐振腔（3），每个谐振腔内均安装有谐振杆（4），盖板上安装有调谐螺杆（5），所述腔体为塑料材质，所述腔体的底部外表面上设有金属散热板（6），每根谐振杆的底端均与金属散热板连接，所述每根谐振杆的底端连接有金属导热件，所述金属导热件的底端与金属散热板连接，所述谐振杆与金属导热件一体成型，所述金属导热件穿过腔体的底面与金属散热板连接，金属导热件通过连接件（10）与金属散热板连接，所述连接件从下往上穿过金属散热板与金属导热件连接。所述滤波器降低了塑料腔体内部积聚的热量，并且能保持很好地电气性能，易于装配、制造，降低了生产成本。

Description

室内用多腔体滤波器
技术领域
本发明属于通信行业用电气元件技术领域， 具体涉及一种室内用多腔体滤 波器。 背景技术
通信系统中通常采用腔体滤波器将特定频率范围的干扰信号或杂波信号 滤除， 现有腔体滤波器一般采用铝、 铜等贵重金属制作， 不仅重量大、 不利于 安装、 拆卸以及运输， 而且由于贵重金属的价格较高， 导致腔体滤波器的成本 较高， 因此， 各家滤波器厂商都在投入大量精力不断地开拓新技术和新工艺， 以减轻企业生产成本。 在各种降成本方案中， 采用塑料材质制作滤波器腔体的 方案是一种比较合理的方案， 该方案相对金属滤波器腔体来说， 由于塑料腔体 具有较轻的重量、 较强的刚性性能， 不易受到外界温度变化的影响， 而越来越 受到各家滤波器厂商的重视。
然而， 塑料的热传导性能比金属要差， 在腔体滤波器使用过程中， 积聚在 塑料腔体内部的热量不能及时散发出去， 会导致局部温度越来越高而使室内用 多腔体滤波器整体功能失效； 尤其对于大功率滤波器而言， 塑料腔体内部在短 时间内会积聚较多热量， 而不能及时散发出去， 导致室内用多腔体滤波器的电 气性能指标下降， 不能满足工作的需求， 现有的室内用多腔体滤波器中， 只能 在很小频率的滤波器中使用塑料腔体， 稍大功率的滤波器， 根本无法采用塑料 腔体的方案以降低企业生产成本的压力， 塑料腔体的散热问题一直以来严重地 制约着腔体滤波器的发展进程。 发明内容
本发明的目的是提供一种不仅能解决塑料滤波器的散热问题、 降低滤波器 的生产成本， 并具有很好的电气性能的室内用多腔体滤波器。
为实现上述目的， 本发明设计的一种室内用多腔体滤波器， 包括腔体、 设 置在腔体上的盖板， 所述腔体内设有多个谐振腔， 每个谐振腔内均安装有谐振 杆， 盖板上安装有调谐螺杆， 所述腔体为塑料材质， 所述腔体的底部外表面上 设有金属散热板， 每根谐振杆的底端均与金属散热板连接， 所述每根谐振杆的 底端连接有金属导热件， 所述金属导热件的底端与金属散热板连接， 所述谐振 杆与金属导热件一体成型， 所述金属导热件穿过腔体的底面与金属散热板连 接， 所述金属导热件通过连接件与金属散热板连接， 所述连接件从下往上穿过 金属散热板与金属导热件连接。
在上述技术方案中， 所述谐振杆的下端部设置一圈环状凸台。
在上述技术方案中， 所述金属散热板为一整片。
本申请的发明人通过不断地实验发现如下规律， 腔体滤波器工作过程中， 腔体内部的主要热量来源于谐振杆， 基于这一规律， 本发明将谐振杆的底端与 位于塑料腔体外部的金属散热板连接， 利用金属导热率高的特性， 通过谐振杆 的底端与金属散热板之间的金属导热件将塑料腔体内部的大部分热量传导于 金属散热板， 并由金属散热板散发到塑料腔体外部周围的空间， 有效降低了塑 料腔体内部积聚的热量， 使得在滤波器中采用塑料腔体时， 能够保持很好地电 气性能， 可以大幅提高塑料腔体滤波器的功率容量； 同时本发明的金属导热件 与金属散热板、 以及谐振杆的结构、 连接方式简单， 易于制造， 也很容易装配， 而且还大大降低了滤波器的生产成本。 附图说明
图 1是本发明结构示意图；
图 2是本发明的谐振杆结构示意图；
图中： 1-腔体、 2-盖板、 3-谐振腔、 4-谐振杆、 5-调谐螺杆、 6-金属散热板、 7-金属导热件、 8-环状凸台、 9-台阶、 10-螺钉。 具体实施方式
以下结合附图和具体实施例对本发明作进一步的详细描述：
本发明的总体方案是， 在腔体的底部外表面设置金属散热板， 将谐振杆的 底端与金属散热板连接， 通过面积较大的金属散热板， 将塑料腔体内部的热量 散发到腔体外面， 降低塑料腔体的内部的温度。
如图 1所示的室内用多腔体滤波器包括腔体 1、 设置在腔体 1上的盖板 2， 腔体 1 内设有多个谐振腔 3， 每个谐振腔 3 内均安装有谐振杆 4， 盖板 2与上 谐振杆 4对应的位置均安装有调谐螺杆 5， 谐振杆 4内为空心结构， 调谐螺杆 5正对着谐振杆 4的空心， 可通过调节调谐螺杆 5深入到谐振杆 4内的深度， 调节滤波器的工作频率。 腔体 1为塑料材质， 盖板 2和谐振杆 4以及调谐螺杆 5均为金属材质制作， 腔体 1的底部外表面上设有金属散热板 6， 每根谐振杆 3 的底端均与金属散热板 6连接， 连接件从下往上穿过金属散热板 6与金属导热 件 7连接。
参阅图 2所示， 谐振杆 4的底端连接有金属导热件 7， 谐振杆 3与金属导 热件 7—体成型， 金属散热板 6为一整片。金属导热件 7的外径小于谐振杆 3， 金属导热件 7与谐振杆 3的连接处构成台阶 9， 台阶 9的下底面与塑料腔体 1 底面的上表面接触， 金属导热件 7穿过腔体 1的底面与金属散热板 6接触， 在 腔体 1 的底面与每根谐振杆 4对应的位置上设置有通孔， 金属导热件 7穿过通 孔与金属散热板 6接触， 通过螺钉 10将金属散热板 4与金属导热件 5、谐振杆 4连接并固定在一起。 在谐振杆 4的下端部设置一圈环状凸台 8， 谐振杆 4的 下端与腔体 1 的底部的上表面通过环状凸台 8 以圆环接触， 在腔体 1底面的上 表面不光滑情况下， 也可以很好地使谐振杆 4与腔体 1底面的上表面接触， 减 少了腔体 1的生产工艺要求， 降低了生产成本， 特别适合于室内使用。
由于在腔体 1底面上设置一整块金属散热板 6， 将每根谐振杆 4通过金属 导热件 7与金属散热板 6连接， 金属散热板 6的面积较大， 散热快， 可很好地 降低塑料腔体的内部的温度。
本发明的金属散热板 4和金属导热件 5可使用导热性能较好的铝材质。 本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技 术。

Claims

权 利 要 求 书
1、 一种室内用多腔体滤波器， 包括腔体 （1)、 设置在腔体 （1) 上的盖 板 （2)， 所述腔体 （1) 内设有多个谐振腔 （3)， 每个谐振腔 （3) 内均安装 有谐振杆 （4)， 盖板 （2) 上安装有调谐螺杆 （5)， 所述腔体 （1) 为塑料材 质， 其特征在于： 所述腔体 （1) 的底部外表面上设有金属散热板 （6)， 每 根谐振杆 （3) 的底端均与金属散热板 （6) 连接， 所述每根谐振杆 （3) 的 底端连接有金属导热件 （7)， 所述金属导热件 （7) 的底端与金属散热板 （6) 连接， 谐振杆 （3) 与金属导热件 （7) —体成型， 所述金属导热件 （7) 穿 过腔体 （1) 的底面通过连接件与金属散热板 （6) 连接,所述连接件从穿过金 属散热板 （6) 底部穿过与金属导热件 （7) 连接。
2、 根据权利要求 1所述的室内用多腔体滤波器， 其特征在于： 所述谐振 杆 （3) 的下端部设置一圈环状凸台 （8)。
3、 根据权利要求 1或 2所述的室内用多腔体滤波器， 其特征在于： 所述 金属散热板 （6) 为一整片。
PCT/CN2012/078527 2012-02-08 2012-07-12 室内用多腔体滤波器 WO2013117075A1 (zh)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
CN2012100268317A CN102709629A (zh) 2012-02-08 2012-02-08 中频段大功率腔体滤波器
CN2012100268209A CN102544657A (zh) 2012-02-08 2012-02-08 高频段大功率塑料腔体滤波器
CN201210026820.9 2012-02-08
CN201220039239.6 2012-02-08
CN201210026831.7 2012-02-08
CN2012100268181A CN102569957A (zh) 2012-02-08 2012-02-08 室内用多腔体滤波器
CN2012100268177A CN102544656A (zh) 2012-02-08 2012-02-08 腔体滤波器
CN201210026818.1 2012-02-08
CN201210026817.7 2012-02-08
CN 201220039239 CN202454699U (zh) 2012-02-08 2012-02-08 腔体滤波器

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PCT/CN2012/078474 WO2013117072A1 (zh) 2012-02-08 2012-07-11 中频段大功率腔体滤波器
PCT/CN2012/078492 WO2013117073A1 (zh) 2012-02-08 2012-07-11 腔体滤波器
PCT/CN2012/078527 WO2013117075A1 (zh) 2012-02-08 2012-07-12 室内用多腔体滤波器

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PCT/CN2012/078474 WO2013117072A1 (zh) 2012-02-08 2012-07-11 中频段大功率腔体滤波器
PCT/CN2012/078492 WO2013117073A1 (zh) 2012-02-08 2012-07-11 腔体滤波器

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CN111697295A (zh) * 2020-07-21 2020-09-22 成都镭迪昇科技有限公司 一种具有调谐结构的电磁混合滤波器
CN115377637A (zh) * 2022-09-26 2022-11-22 河北优圣通信科技有限公司 可调谐腔体滤波器

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