WO2012022201A1 - 腔体滤波器及腔体滤波器制造方法 - Google Patents

腔体滤波器及腔体滤波器制造方法 Download PDF

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Publication number
WO2012022201A1
WO2012022201A1 PCT/CN2011/076684 CN2011076684W WO2012022201A1 WO 2012022201 A1 WO2012022201 A1 WO 2012022201A1 CN 2011076684 W CN2011076684 W CN 2011076684W WO 2012022201 A1 WO2012022201 A1 WO 2012022201A1
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WIPO (PCT)
Prior art keywords
resonance tube
cover plate
cavity filter
cavity
manufacturing
Prior art date
Application number
PCT/CN2011/076684
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English (en)
French (fr)
Inventor
孙尚传
童恩东
茹志云
Original Assignee
深圳市大富科技股份有限公司
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Publication of WO2012022201A1 publication Critical patent/WO2012022201A1/zh

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/007Manufacturing frequency-selective devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/207Hollow waveguide filters
    • H01P1/208Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00Resonators of the waveguide type
    • H01P7/06Cavity resonators

Definitions

  • the present invention relates to the field of filter technologies, and in particular, to a cavity filter and a cavity filter manufacturing method. ⁇ Background technique ⁇
  • the cavity filter is widely used in the field of communications as a frequency selective device, especially in the field of radio frequency communication.
  • a filter is used to select a communication signal to filter out clutter or interference signals outside the frequency of the communication signal.
  • the cavity filter generally includes three types, the first type is a coaxial cavity filter, the second type is a dielectric filter, and the third type is a waveguide filter.
  • a coaxial cavity filter it generally includes: a cavity, a cover plate, and a metal resonance tube housed in the cavity.
  • FIG. 1 A schematic cross-sectional view of a cavity filter in the prior art is shown in FIG. 1.
  • the resonance tube 101 is usually formed by a turning process, and then the resonance tube 101 is fixed to the bottom surface 102 of the cavity by a screw 103, and finally The cover plate 104 is assembled.
  • the inventors of the present invention have found that in the prior art, since the cover plate and the resonance tube are separately processed and assembled later, the resonance tube and the cavity may be in poor contact, and Due to the limitation of the processing method of the resonance tube, the cost is relatively high.
  • the cavity filter and the cavity filter manufacturing method provided by the embodiments of the present invention can reduce the production cost of the filter.
  • the cavity filter provided by the embodiment of the invention comprises a cavity and a cover plate, and the cover plate is provided with a resonance tube, and the resonance tube is integrally formed with the cover plate.
  • the method for manufacturing a cavity filter includes: providing a plate as a cavity filter cover; forming a position of the resonance tube on the cover plate, stamping the cover plate to form a cover body a resonance tube; the cover plate with the resonance tube is assembled with the cavity.
  • the resonance tube is integrally formed with the cover plate, so that the resonance tube and the cover plate are seamlessly connected, thereby avoiding the problem that the resonance tube and the filter cavity are in poor contact, and the resonance tube and the cover plate are made of the same plate.
  • the material cost and the processing cost are greatly reduced, and the process of assembling the resonance tube on the bottom surface of the cavity is omitted, the assembly is simple, and the cost of the filter is reduced.
  • FIG. 1 is a schematic cross-sectional view of a cavity filter in the prior art
  • FIG. 2(a) is a partial structural schematic view of a cavity filter cover plate according to Embodiment 1 of the present invention.
  • FIG. 2(b) is a partial cross-sectional view showing a cavity filter according to Embodiment 1 of the present invention
  • FIG. 3(a) is a partial structural schematic view of a cavity filter cover plate according to Embodiment 2 of the present invention.
  • 3(b) is a partial cross-sectional view showing a cavity filter according to Embodiment 2 of the present invention.
  • FIG. 3(c) is a partial structural schematic view of a cavity filter cover plate according to Embodiment 2 of the present invention
  • FIG. 3(d) is a partial structural schematic view of another cavity filter cover plate according to Embodiment 2 of the present invention
  • 4 is a flowchart of a method for manufacturing a cavity filter according to Embodiment 3 of the present invention
  • FIG. 5 is a flow chart of a method for manufacturing a cavity filter according to Embodiment 4 of the present invention.
  • a cavity filter includes a cavity and a cover plate.
  • the structure of the cover plate is shown in Fig. 2(a), and the schematic view of the cavity filter is shown in Fig. 2(b).
  • a resonance tube 202 is disposed on the 201, and the resonance tube 202 is integrally formed with the cover plate 201.
  • the resonance tube and the cover plate can be integrally formed in various forms.
  • the resonance tube can be integrally molded with the cover plate, and the resonance tube can also be formed by stamping the cover plate.
  • the thickness of the cavity filter cover plate can be set to 0.5 ⁇ 4.0cm.
  • the thickness can be selected from 2.0 to 4.0 cm, for example, 2.0 cm, 3.0 cm. , 4.0cm, in order to meet the requirements of the thickness of the cover plate for die casting; for the way of stamping the cover plate to form the resonance tube, the thickness of the cover plate can be selected from 0.5 to 2.0 cm, for example, 0.5 cm, 1.5 cm, 2.0 cm, The thickness of the plate is selected moderately.
  • the plate with different thickness is selected as the cover plate, which can avoid the high cost caused by the too thick plate, and can avoid the cover plate caused by the too thin plate.
  • the deformation, the tight fit with the cavity, the flatness is not high, and the resonance tube is easily deformed and torn. It will be understood that the thickness of the particular sheet material and the choice of material do not constitute a limitation of the invention.
  • the resonance tube and the cover plate are integrally formed, so that the resonance tube and the cover plate are seamlessly connected, and the material cost and the processing cost are greatly reduced compared with the processing and assembly manner of the existing resonance tube, thereby eliminating the need for the material cost and the processing cost.
  • the process of assembling the resonance tube on the bottom surface of the cavity is easy to assemble and reduces the cost of the filter.
  • Embodiment 2 a cavity filter, including a cavity and a cover plate, a schematic diagram of a structure of a cavity filter cover plate is referred to FIG. 3( a ), and a schematic diagram of a cross-section of the cavity filter is described with reference to FIG. 3( b )
  • a resonance tube 302 is disposed on the cover plate 301, and the resonance tube is integrally formed with the cover plate.
  • the cover plate 301 may be provided with a plurality of protrusions 303.
  • the plurality of protrusions may be distributed in a plurality of manners, for example, radially distributed on the cover plate around the resonance tube 302.
  • the schematic diagram of the partial structure is shown in Fig. 3(c), and may also be distributed in an arc shape around the resonance tube.
  • the schematic diagram of the partial structure is shown in Fig. 3(d).
  • the cross section of the protrusion may be circular, trapezoidal, rectangular or semi-circular, and the specific shape and structure do not constitute a limitation of the present invention.
  • the protrusions may be implemented in various ways, for example, by stamping from the lower surface of the cover plate to the upper surface direction to form protrusions on the cover.
  • the strength of the cover plate can be enhanced to act as a reinforcing rib, so that The deformation resistance of the cover plate is improved to avoid the influence of the deformation of the cover on the cavity filter index.
  • the cavity filter further includes a tuning screw 310.
  • the bottom surface 304 of the cavity is provided with a threaded hole along the axial direction of the resonant tube 302.
  • the tuning screw 310 is assembled through the threaded hole, and the tuning screw 310 is adjusted.
  • the relative position of the resonant tube 302 is used to adjust the RF parameters of the cavity filter.
  • the relative position of the tuning screw 310 to the resonance tube 302 can be adjusted, for example, by screwing in or out the tuning screw 310, so that the distance between the tuning screw and the bottom surface of the resonance tube becomes smaller or larger, thereby making it possible to make the distance between the tuning screw and the bottom surface of the resonance tube smaller or larger.
  • the resonant frequency of the cavity filter changes to some extent.
  • the tuning screw includes a tuning disk 311 and a screw 312.
  • the tuning disk 311 is located inside the cavity.
  • the end 313 of the screw 312 away from the tuning disk 311 is located outside the cavity, and the screw end 313 is provided with a "one" groove.
  • the shape of the shape of the mouth, the tuning disk 311 can also be provided with a "one" groove-shaped closing structure, so as to facilitate the assembly of the tuning screw with the help of a flat-blade screwdriver, and can be adjusted by screwing in or out the tuning screw.
  • the purpose of tuning the distance between the disk and the bottom surface of the resonance tube is not limited to tuning the distance between the disk and the bottom surface of the resonance tube.
  • the closing structure is not limited thereto, and those skilled in the art can easily think of other closing structures commonly used in the prior art, such as "ten" groove, inner hexagonal groove, hexagonal groove or other convex polygon or concave polygon. Wait.
  • a tuning screw of the same size at both ends or a adjusting screw of a semicircular head.
  • the shape of the specific tuning screw does not constitute a limitation of the present invention.
  • the cavity filter may further include a nut 314 and a spacer 315 that cooperate with the tuning screw 310 to securely lock the tuning screw to the cavity.
  • the resonance tube of the cavity filter is integrally formed with the cover plate, so that the resonance tube and the cover plate are seamlessly connected, thereby avoiding the problem that the resonance tube and the filter cavity are in poor contact, and the resonance tube and the cover plate are ⁇ Made of the same plate, compared with the existing processing and assembly methods of the cover plate and the resonance tube, the processing cost is greatly reduced, and the process of assembling the resonance tube on the bottom surface of the cavity is omitted, and the assembly is simple, thereby reducing The cost of the filter.
  • Embodiment 3 A method for manufacturing a cavity filter, comprising:
  • A1 provides a plate as a cavity filter cover.
  • the cavity filter cover There may be various kinds of plates as the cavity filter cover, for example, the thickness of the plate may be
  • the material of the plate may be one or more of copper or steel or alloy aluminum.
  • the thickness of the specific plate and the selection of the material do not constitute a limitation of the present invention.
  • a position of the resonance tube is required on the cover plate to punch the cover plate to form a resonance tube integral with the cover plate.
  • the position of the resonance tube on the cover plate may be one or more.
  • the stamping of the cover plate may be The plurality of positions are simultaneously stamped. Simultaneous stamping of multiple locations is beneficial to increase production efficiency, thereby reducing costs, and is advantageous for the cover to be evenly stressed, thereby facilitating the flatness of the cover.
  • cover plate and the cavity There are various methods for assembling the cover plate and the cavity, for example, fixing the cover plate to the cavity by means of screw locking, or welding the cover plate to the cavity by welding, it is understood that The manner in which the specific cover and the resonance tube are assembled does not constitute a limitation of the present invention.
  • the resonance tube and the cover plate are integrally formed, so that the resonance tube and the cover plate are seamlessly connected, thereby avoiding the problem that the resonance tube and the filter cavity are in poor contact, and the resonance tube and the cover plate are made of the same plate.
  • the material cost and the processing cost are greatly reduced, and the process of assembling the resonance tube on the bottom surface of the cavity is omitted, and the assembly is simple and the cost of the filter is reduced.
  • Embodiment 4 A method for manufacturing a cavity filter, comprising:
  • B1 provides a plate as a cavity filter cover.
  • the sheet used as the cavity filter cover may be various, for example, the material of the sheet may be one or more of copper or steel or alloy aluminum.
  • the material of the sheet material may be SPCE (Steel Plate Cold Elongation), that is, a cold-rolled steel sheet for deep drawing, which is suitable for deep drawing and stretching, and has a deep drawing property.
  • the thickness of the sheet can be set to 0.5 ⁇ 2.0cm, and the thickness of the sheet is moderate.
  • the thickness of the sheet is 0.5cm, 1.0cm, 1.5cm, 2.0cm, can avoid the high cost caused by the too thick plate, and can avoid the cover plate is too deformed due to the too thin plate, the cavity is not tightly fitted, and the flatness is not high.
  • the resonance tube is easily deformed and torn. It will be understood that the thickness of the particular sheet material and the choice of material do not constitute a limitation of the invention.
  • the position of the resonance tube needs to be set on the cover plate to deeply deepen the cover plate to form a resonance tube, wherein the depth of each deep drawing is increasing, and finally the resonance tube meets the required height.
  • the shape of the resonance tube can be various, such as a cylindrical shape, a conical shape, a rectangular shape, etc., according to the specific shape of the required resonance tube, the depth of each deep drawing can be set, so that the multiple pull The deep-formed resonance tube meets the required height.
  • the plurality of drawing of the sheet is performed simultaneously for each of the plurality of positions. Take a deep draw. Simultaneous drawing of a plurality of positions is advantageous for improving production efficiency, thereby reducing costs, and facilitating the hooking of the cover plate, thereby facilitating the flatness of the cover plate.
  • the shaping is performed in order to achieve the specified dimensional tolerance requirements, shape and position tolerance requirements, surface roughness requirements, and the like.
  • the purpose of electroplating is to make the surface of the resonance tube have better conductivity, improve the surface roughness of the resonance tube, and optimize the index parameters of the filter.
  • the outer wall of the resonance tube can be Silver or copper plating, of course, it is also possible to use one or more of silver or copper or other electroplating materials to plate the inner and outer walls of the resonance tube. Different indexes and parameters may be used for different products.
  • the plating method and the plating material, and the thickness of the plating layer can also be set as needed, and do not constitute a limitation of the present invention.
  • cover and the cavity There are various ways to assemble the cover and the cavity, for example, by screwing the cover The plate is fixed to the cavity, or the cover plate is welded to the cavity by welding. It will be understood that the manner in which the specific cover plate and the resonance tube are assembled does not constitute a limitation of the present invention.
  • the sheet is stamped by means of multiple deep drawing, and the depth of each drawing is increasing, and finally the resonance tube meets the required height. Since the depth of each drawing is increasing, the tube wall of the resonance tube is gradually thinned and deep-drawn, and the formed resonance tube has the characteristics of thinness, hook, high strength, etc., thereby effectively reducing the phenomenon of tearing and tearing, and production. High stability and low production cost. Moreover, the processed resonance tube and the cover plate are integrally formed, so that the resonance tube and the cover plate are seamlessly connected, which is convenient for ensuring the index, simple assembly, high production efficiency, and low production cost.
  • the foregoing storage medium includes: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, and the program code can be stored. Medium.

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Abstract

本发明公开了一种腔体滤波器及腔体滤波器制造方法,本发明实施例提供的腔体滤波器,包括腔体和盖板,谐振管与盖板一体成型,使得谐振管与盖板无缝连接,相对于现有的谐振管的加工及装配方式,大幅度降低了材料成本和加工成本,省去了将谐振管装配在腔体底面上的工序,装配简便,降低了滤波器的成本。

Description

腔体滤波器及腔体滤波器制造方法
【技术领域】
本发明涉及滤波器技术领域, 具体涉及腔体滤波器及腔体滤波器制造方法。 【背景技术】
腔体滤波器作为一种频率选择装置被广泛应用于通信领域, 尤其是射频通 信领域。 在基站中, 滤波器用于选择通信信号, 滤除通信信号频率外的杂波或 干扰信号。
腔体滤波器一般包括三类, 第一类是同轴腔体滤波器, 第二类是介质滤波 器, 第三类是波导滤波器。 对于同轴腔体滤波器, 一般包括: 腔体、 盖板以及 收容在腔体内的金属谐振管。
现有技术中一种腔体滤波器的剖面示意图如图 1 所示, 通常利用车削加工 的方式制成谐振管 101 ,然后再用螺钉 103将谐振管 101固定在腔体底面 102上, 最后再装配盖板 104。
在对现有技术的研究和实践过程中, 本发明的发明人发现, 现有技术中, 由于盖板和谐振管是单独加工,并后期装配的,谐振管与腔体有可能接触不良, 并且由于谐振管加工方式的限制, 成本相对比较高。
【发明内容】
本发明实施例提供的腔体滤波器及腔体滤波器制造方法, 可以降低滤波器 的生产成本。
本发明实施例提供的腔体滤波器, 包括腔体和盖板, 所述盖板上设置有谐 振管, 所述谐振管与所述盖板一体成型。
本发明实施例提供的腔体滤波器制造方法, 包括: 提供一块板材作为腔体 滤波器盖板; 在所述盖板上需要设置谐振管的位置对盖板进行冲压形成与所述 盖板一体的谐振管; 将所述带有谐振管的盖板与腔体进行装配。 本发明实施例中, 谐振管与盖板一体成型, 使得谐振管与盖板无缝连接, 避免了谐振管与滤波器腔体接触不良的问题, 并且谐振管与盖板釆用同一板材 制成, 相对于现有的谐振管的加工及装配方式, 大幅度降低了材料成本和加工 成本, 省去了将谐振管装配在腔体底面上的工序, 装配简便, 降低了滤波器的 成本。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述中所 需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明 的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1是现有技术中一种腔体滤波器的剖面示意图;
图 2(a)是本发明实施例一中腔体滤波器盖板的局部结构示意图;
图 2(b)是本发明实施例一中腔体滤波器的局部剖面示意图;
图 3(a)是本发明实施例二中腔体滤波器盖板的局部结构示意图;
图 3 (b )是本发明实施例二中腔体滤波器的局部剖面示意图;
图 3(c)是本发明实施例二中一种腔体滤波器盖板的局部结构示意图; 图 3(d)是本发明实施例二中另一种腔体滤波器盖板的局部结构示意图; 图 4是本发明实施例三中腔体滤波器制造方法的流程图;
图 5是本发明实施例四中腔体滤波器制造方法的流程图。
【具体实施方式】
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。 实施例一、 一种腔体滤波器, 包括腔体和盖板, 盖板的结构示意图如图 2(a) 所示, 腔体滤波器的剖面示意图如图 2(b)所示, 盖板 201上设置有谐振管 202 , 所述谐振管 202与所述盖板 201—体成型。
谐振管与盖板一体成型的实现方式可以有多种, 例如, 谐振管可以与盖板 整体压铸而成, 谐振管也可以是对盖板进行冲压形成的。
腔体滤波器盖板的厚度可以设置为 0.5~4.0cm, 对于将谐振管与盖板釆用整 体压铸方式而成的盖板,其厚度可以选取为 2.0~4.0cm,例如 2.0cm、 3.0cm, 4.0cm, 以便满足压铸对盖板厚度的要求; 对于釆用对盖板冲压从而形成谐振管的方式, 盖板的厚度可以选取为 0.5~2.0cm, 例如 0.5cm、 1.5cm, 2.0cm, 将板材的厚度 选取适中, 例如, 根据谐振管的加工方式的不同选取不同厚度的板材做盖板, 可以避免因板材太厚造成的成本较高, 且可以避免因板材太薄造成的盖板易变 形、 与腔体配合不紧密、 平整度不高, 谐振管易变形、 撕裂等问题。 可以理解, 具体的板材的厚度以及材质的选取不构成对本发明的限制。
本发明实施例中, 谐振管与盖板一体成型, 使得谐振管与盖板无缝连接, 相对于现有的谐振管的加工及装配方式, 大幅度降低了材料成本和加工成本, 省去了将谐振管装配在腔体底面上的工序, 装配简便, 降低了滤波器的成本。
实施例二、 一种腔体滤波器, 包括腔体和盖板, 腔体滤波器盖板的结构示 意图参考图 3(a), 腔体滤波器的剖面示意图参考图 3(b), 所述盖板 301上设置有 谐振管 302, 所述谐振管与所述盖板一体成型。
本发明实施例中, 盖板 301上可以设置有多个突起 303 , 所述多个突起可以 有多种分布方式,例如,可以以所述谐振管 302为中心呈放射状分布于盖板上, 其局部结构示意图如图 3(c),也可以呈圓弧状分布在所述谐振管周围,其局部结 构示意图如图 3(d)。 所述突起的横截面可以呈圓弧形、 梯形、 矩形或半圓形, 具 体的形状和结构不构成对本发明的限制。 所述突起的实现方式可以有多种, 例 如,釆用冲压的方式从盖板下表面向上表面方向冲压,从而在盖板上形成突起。
通过在盖板上设置突起, 可以加强盖板的强度, 起到加强筋的作用, 使得 盖板的抗变形性能提高, 避免盖板变形对腔体滤波器指标的影响。
本发明实施例中, 腔体滤波器还包括调谐螺钉 310 , 腔体底面 304上设置有 沿谐振管 302轴线方向的螺紋孔, 所述调谐螺钉 310贯穿所述螺紋孔装配, 通 过调节调谐螺钉 310与谐振管 302的相对位置来调节腔体滤波器的射频参数。
通过设置调谐螺钉,可以通过调节调谐螺钉 310与谐振管 302的相对位置, 例如, 通过旋进或旋出调谐螺钉 310 ,使得调谐螺钉与谐振管底面之间的距离变 小或变大, 从而使得腔体滤波器的谐振频率发生一定的变化。
调谐螺钉包括调谐盘 311和螺杆 312, 所述调谐盘 311位于腔体内部, 所述 螺杆 312远离调谐盘 311的端部 313位于腔体外部,螺杆端部 313上设置有"一" 字凹槽形收口结构, 调谐盘 311 上也可以设置 "一" 字凹槽形收口结构, 以便 于配合一字螺丝刀施力, 从而方便地装配调谐螺钉, 同时可以通过旋进或旋出 调谐螺钉, 达到调节调谐盘与谐振管底面之间距离的目的。 当然, 收口结构并 不限于此,本领域技术人员容易想到现有技术中常用的其他收口结构,例如 "十" 字凹槽、 内六花凹槽、 内六角凹槽或其他凸起多边形或凹陷多边形等。 当然, 也可以釆用两端大小一致的调谐螺杆, 或者釆用半圓头的调节螺杆, 具体的调 谐螺钉的形状不构成对本发明的限制。 通过釆用带有调谐盘的调谐螺钉, 使得 调谐盘与谐振管底面之间的距离发生变化, 以便调节滤波器的谐振频率。
在本实施例中,腔体滤波器还可以包括有与调谐螺钉 310相配合的螺母 314 及垫片 315 , 从而使得调谐螺钉与腔体可靠锁紧。
本发明实施例二中, 腔体滤波器的谐振管与盖板一体成型, 使得谐振管与 盖板无缝连接, 避免了谐振管与滤波器腔体接触不良的问题, 并且谐振管与盖 板釆用同一板材制成, 相对于现有的盖板与谐振管的加工及装配方式, 大幅度 降低了加工成本, 省去了将谐振管装配在腔体底面上的工序, 装配简便, 从而 降低了滤波器的成本。
实施例三、 一种腔体滤波器制造方法, 包括:
A1 , 提供一块板材作为腔体滤波器盖板。 作为腔体滤波器盖板的板材可以有多种, 例如, 所述板材的厚度可以为
0.5~2.0cm, 板材的材质可以为铜或钢或合金铝中的一种或多种, 具体的板材的 厚度以及材质的选取不构成对本发明的限制。
A2, 在所述盖板上需要设置谐振管的位置对盖板进行冲压形成与所述盖板 一体的谐振管。
本发明实施例中, 所述盖板上需要设置谐振管的位置可以有一个或多个, 当盖板上需要设置谐振管的位置有多个时, 所述对盖板进行冲压可以是对所述 多个位置同时进行冲压。 对多个位置同时进行冲压, 有利于提高生产效率, 进 而降低成本, 并且有利于使盖板受力均勾, 进而有利于提高盖板的平整度。 当 然, 也可以对各个位置处逐个进行冲压, 具体的冲压顺序的选取不构成对本发 明的限制。
A3 , 将所述带有谐振管的盖板与腔体进行装配。
将盖板与腔体进行装配的方法可以有多种, 例如, 用螺钉锁紧的方式将盖 板固定到腔体上, 或者用焊接的方式将盖板与腔体焊接在一起, 可以理解, 具 体的盖板与谐振管的装配方式不构成对本发明的限制。
本发明实施例三中,谐振管与盖板一体成型,使得谐振管与盖板无缝连接, 避免了谐振管与滤波器腔体接触不良的问题, 并且谐振管与盖板釆用同一板材 制成, 相对于现有的谐振管的加工及装配方式, 大幅度降低了材料成本和加工 成本, 省去了将谐振管装配在腔体底面上的工序, 装配简便, 降低了滤波器的 成本。
实施例四、 一种腔体滤波器制造方法, 包括:
B1 , 提供一块板材作为腔体滤波器盖板。
用做腔体滤波器盖板的板材可以有多种, 例如, 所述板材的材质可以为铜 或钢或合金铝中的一种或多种。 例如, 所述板材的材质可以为 SPCE ( Steel Plate Cold Elongation ), 即深冲用冷轧钢板, 该材质适合用于深冲拉伸用途, 其深冲 性能较好。 板材厚度可以设置为 0.5~2.0cm, 板材厚度适中, 例如, 板材厚度为 0.5cm, 1.0cm, 1.5cm, 2.0cm, 可以避免因板材太厚造成的成本较高, 且可以避 免因板材太薄造成的盖板易变形、 与腔体配合不紧密、 平整度不高, 谐振管易 变形、 撕裂等问题。 可以理解, 具体的板材的厚度以及材质的选取不构成对本 发明的限制。
B2,在所述盖板上需要设置谐振管的位置对盖板进行多次拉深形成谐振管, 其中, 每次拉深的深度呈递增趋势最终至谐振管满足需要高度。
在本实施例中, 谐振管的形状可以有多种, 如圓柱形、 圓锥形、 矩形等, 根据所需谐振管的具体形状, 可以对每次拉深的深度进行设置, 使得多次拉深 成形的谐振管满足需要高度。
所述板材上需要设置谐振管的位置可以有一个或多个, 当板材上需要设置 谐振管的位置有多个时, 所述对板材进行多次拉深是每次对所述多个位置同时 进行拉深。 对多个位置同时进行拉深, 有利于提高生产效率, 进而降低成本, 并且有利于使盖板受力均勾, 进而有利于提高盖板的平整度。 当然, 也可以对 各个位置处逐次进行拉深, 具体的拉深顺序的选取不构成对本发明的限制。
B3、 对谐振管进行整形。
本实施例中, 进行整形是为了使谐振管达到规定的尺寸公差要求、 形位公 差要求、 表面粗糙度要求等。
B4、 对谐振管电镀处理。
本实施例中, 电镀的目的是使谐振管表面具有更好的导电性能, 提高谐振 管表面粗糙度, 优化滤波器的指标参数, 具体的电镀方式有多种, 例如, 可以 对谐振管的外壁镀银或镀铜, 当然也可以釆用银或铜或其他电镀材料中的一种 或多种对谐振管的内壁以及外壁进行电镀, 基于对产品的指标和参数要求不同, 可以釆取不同的电镀方式和电镀材料, 电镀层的厚度也可根据需要进行设置, 均不构成对本发明的限制。
B5 , 将所述带有谐振管的盖板与腔体进行装配。
将盖板与腔体进行装配的方法可以有多种, 例如, 用螺钉锁紧的方式将盖 板固定到腔体上, 或者用焊接的方式将盖板与腔体焊接在一起, 可以理解, 具 体的盖板与谐振管的装配方式不构成对本发明的限制。
本发明实施例四中, 釆用多次拉深的方式对板材进行冲压, 每次拉深的深 度呈递增趋势最终至谐振管满足需要高度。 由于每次拉深的深度呈递增趋势, 使得谐振管的管壁逐步变薄拉深成形, 成形的谐振管具有薄、 勾、 强度高等特 点, 因而可以有效减少撕裂、 拉破的现象, 生产稳定性高, 生产成本低。 而且, 加工出的谐振管与盖板一体成型,使得谐振管与盖板无缝连接,便于保证指标, 装配简便, 生产效率高, 生产成本低。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读取存 储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储 介质包括:只读存储器( Read-Only Memory, ROM )、随机存取器 ( Random Access Memory, RAM ), 磁碟或者光盘等各种可以存储程序代码的介质。
以上对本发明实施例所提供的腔体滤波器及腔体滤波器制造方法进行了详 实施例的说明只是用于帮助理解本发明的方法及其核心思想; 同时, 对于本领 域的一般技术人员, 依据本发明的思想, 在具体实施方式及应用范围上均会有 改变之处, 综上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要求
1、 一种腔体滤波器, 包括腔体和盖板, 其特征在于, 所述盖板上设置有谐 振管, 所述谐振管与所述盖板一体成型。
2、 如权利要求 1所述的腔体滤波器, 其特征在于, 所述谐振管是与盖板整 体压铸而成或者对盖板冲压形成的。
3、 如权利要求 1所述的腔体滤波器, 其特征在于, 所述盖板上设置有多个 突起, 用于提高盖板的强度。
4、 如权利要求 1至 3任意一项所述的腔体滤波器, 其特征在于, 所述腔体 滤波器还包括调谐螺钉, 所述腔体底面上设置有沿所述谐振管轴线方向的螺紋 孔, 所述调谐螺钉贯穿所述螺紋孔装配, 通过调节所述调谐螺钉与所述谐振管 的相对位置来调节所述腔体滤波器的射频参数。
5、 如权利要求 4所述的腔体滤波器, 其特征在于, 所述调谐螺钉包括调谐 盘和螺杆, 所述调谐盘位于腔体内部, 所述螺杆远离调谐盘的端部设置有配合 旋合工具施力的收口结构, 所述收口结构为 "一" 字凹槽、 "十" 字凹槽、 凸起 多边形或凹陷多边形。
6、 一种腔体滤波器制造方法, 其特征在于, 包括:
提供一块板材作为腔体滤波器盖板;
在所述盖板上需要设置谐振管的位置对盖板进行冲压形成与所述盖板一体 的谐振管;
将所述带有谐振管的盖板与腔体进行装配。
7、 如权利要求 6所述的腔体滤波器制造方法, 其特征在于, 所述在所述盖 板上需要设置谐振管的位置对盖板进行冲压形成与所述盖板一体的谐振管包括: 对盖板进行多次拉深形成谐振管, 其中, 每次拉深的深度呈递增趋势最终 至谐振管满足需要高度。
8、 如权利要求 7所述的腔体滤波器制造方法, 其特征在于, 所述对盖板进 行多次拉深形成谐振管之后还包括:
对谐振管进行整形。
9、 如权利要求 8所述的腔体滤波器制造方法, 其特征在于, 所述对谐振管 进行整形之后还包括:
对谐振管电镀处理。
10、如权利要求 6至 9任意一项所述的腔体滤波器制造方法,其特征在于, 所述盖板上需要设置谐振管的位置有多个, 所述对盖板进行冲压是对所述多个 位置同时进行冲压。
11、如权利要求 6至 9任意一项所述的腔体滤波器制造方法,其特征在于, 所述板材厚度为 0.5cm~2.0cm。
12、 如权利要求 11所述的腔体滤波器制造方法, 其特征在于, 所述板材的 材质为铜材或钢材或合金铝材。
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