WO2017113164A1 - 一种腔体滤波器及通信射频器件 - Google Patents

一种腔体滤波器及通信射频器件 Download PDF

Info

Publication number
WO2017113164A1
WO2017113164A1 PCT/CN2015/099818 CN2015099818W WO2017113164A1 WO 2017113164 A1 WO2017113164 A1 WO 2017113164A1 CN 2015099818 W CN2015099818 W CN 2015099818W WO 2017113164 A1 WO2017113164 A1 WO 2017113164A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
pass filter
low
filter
cover plate
Prior art date
Application number
PCT/CN2015/099818
Other languages
English (en)
French (fr)
Inventor
李贤祥
杨鹤功
张海峰
谢克坚
Original Assignee
深圳市大富科技股份有限公司
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 深圳市大富科技股份有限公司 filed Critical 深圳市大富科技股份有限公司
Priority to PCT/CN2015/099818 priority Critical patent/WO2017113164A1/zh
Priority to CN201580079837.2A priority patent/CN107615574A/zh
Publication of WO2017113164A1 publication Critical patent/WO2017113164A1/zh

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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H01P1/2039—Galvanic coupling between Input/Output
    • 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

Definitions

  • the present invention relates to the field of electronic technologies, and in particular, to a cavity filter and a communication radio frequency device.
  • a low-pass filter is a component or electronic circuit combination that allows signals below a cut-off frequency to pass, and a signal that is higher than a cut-off frequency cannot pass. It is widely used in various electronic devices and is essential in most circuits. One of the devices.
  • a conventional low pass filter typically includes a cavity 11, a low pass filter element 12, a heat shrink sleeve 13, a cover plate 14, and a connector 15.
  • the low pass filter element 12 is typically a low-pass of the candied haws type, externally surrounded by a heat shrinkable sleeve 13, then placed within the cavity 11 and then pressed by the cover plate 14 to secure the low pass filter element 12 to the cavity 11 Inside. Both ends of the low pass filter element 12 are respectively connected to the connector 15, so that a signal is input from one of the connectors 15 to the low pass filter element 12, filtered by the low pass filter element 12, and outputted through the other connector 15.
  • the low-pass filter element 12 is a sugar cucurbit filter, which has a stepped shape with high and low undulations, a large volume, and a complicated structure, which is disadvantageous to the low-pass filter.
  • the miniaturization and manufacturing process are complicated, which is not conducive to cost reduction.
  • the technical problem to be solved by the present invention is to provide a cavity filter and a communication RF device, which is advantageous for reducing the volume of the filter and reducing the manufacturing process requirements of the filter.
  • a technical solution adopted by the present invention is to provide a cavity filter including a cavity, a cover, a connector, and a sheet-shaped low-pass filter; the cover covers the cavity
  • the body forms a resonant cavity; the low-pass filter is fixed in the cavity by an insulating fixing member and is connected to the connector.
  • the cavity filter further includes a tuning element, the cover plate is provided with a through hole, the tuning element is inserted in the through hole of the cover plate, and between the low pass filter and the cover plate There is a predetermined distance such that the tuning element can be inserted between the cover plate and the low pass filter, and the length of the tuning element inserted between the cover plate and the low pass filter is adjustable.
  • the low-pass filter comprises a sheet-shaped bottom portion and a side portion, the bottom portion and the side portion forming a groove structure, and the end of the tuning element can be inserted into the groove structure.
  • the tuning element is a tuning screw
  • the through hole on the cover plate is a screw hole adapted to the tuning screw
  • the number of the tuning screws is four, and the number of through holes on the cover plate is also four.
  • the surface of the low-pass filter is flat.
  • the insulating fixing member is a plastic screw, and the low-pass filter and the cavity are respectively provided with screw holes matched with the plastic screw, so as to fix the low-pass filter in the cavity. in vivo.
  • an insulating spacer is disposed between the low-pass filter and the bottom of the cavity.
  • the insulating gasket is a polytetrafluoroethylene plastic gasket.
  • the low-pass filter and the bottom of the cavity are suspended.
  • a communication radio frequency device including a cavity filter, and the cavity filter is provided for transmitting and receiving signals of the communication radio frequency device.
  • a circuit portion for selecting a signal the communication radio frequency device being a simplexer, or a duplexer, or a splitter, or a combiner or a tower amplifier;
  • the cavity filter including a cavity, a cover a plate, a connector, and a sheet-shaped low-pass filter; the cover covers the cavity to form a resonant cavity; the low-pass filter is fixed in the cavity by an insulating fixing member, and the connector connection.
  • the cavity filter further includes a tuning element, the cover plate is provided with a through hole, the tuning element is inserted in the through hole of the cover plate, and between the low pass filter and the cover plate There is a predetermined distance such that the tuning element can be inserted between the cover plate and the low pass filter, and the length of the tuning element inserted between the cover plate and the low pass filter is adjustable.
  • the low-pass filter comprises a sheet-shaped bottom portion and a side portion, the bottom portion and the side portion forming a groove structure, and the end of the tuning element can be inserted into the groove structure.
  • the tuning element is a tuning screw
  • the through hole on the cover plate is a screw hole adapted to the tuning screw
  • the number of the tuning screws is four, and the number of through holes on the cover plate is also four.
  • the surface of the low-pass filter is flat.
  • the insulating fixing member is a plastic screw, and the low-pass filter and the cavity are respectively provided with screw holes matched with the plastic screw, so as to fix the low-pass filter in the cavity. in vivo.
  • an insulating spacer is disposed between the low-pass filter and the bottom of the cavity.
  • the insulating gasket is a polytetrafluoroethylene plastic gasket.
  • the low-pass filter and the bottom of the cavity are suspended.
  • the beneficial effects of the present invention are: in the cavity filter of the present invention, by setting the low-pass filter to a sheet-like filter, compared with the existing candied-shaped filter element, the film is different from the prior art.
  • the filter of the structure has a smaller volume and a simpler structure, which is advantageous for reducing the volume of the filter, and at the same time, simplifies the process, and the sheet-like filter is more easily processed through the mold, which is advantageous for reducing the cost.
  • FIG. 1 is a schematic cross-sectional view of a low pass filter in the prior art
  • FIG. 2 is a schematic perspective view showing the structure of the candied hazelnut low-pass filter element shown in FIG. 1;
  • FIG. 3 is a schematic perspective structural view of an embodiment of a cavity filter of the present invention.
  • Figure 4 is a schematic cross-sectional view of the cavity filter shown in Figure 3 along line AB;
  • Figure 5 is a perspective view showing the structure of the low-pass filter in the cavity filter shown in Figure 3;
  • FIG. 6 is a schematic perspective structural view of another embodiment of a cavity filter of the present invention.
  • Figure 7 is a cross-sectional view of the cavity filter shown in Figure 6 along the CD line;
  • FIG. 8 is a schematic structural diagram of an embodiment of a communication radio frequency device according to the present invention.
  • the cavity filter includes a cavity 31, a cover 32, a connector 33, and a sheet-shaped low pass filter 34.
  • the number of the connectors 33 is two, which are respectively disposed at both ends of the cavity 31, and of course, the number of the connectors 33 is not limited thereto.
  • the cover plate 32 covers the cavity 31 to form a resonant cavity 311.
  • the low-pass filter 34 is located in the cavity 311, and the low-pass filter 34 is fixed in the cavity 31 through the insulating fixing member 35, and is connected to the two connectors 33.
  • the signal is input from one of the connectors 33, filtered by the low-pass filter 34, and outputted from the other connector 33, thereby effecting filtering of the cavity filter.
  • the structure of the low-pass filter 34 may be a structure as shown in FIG. 5, including a sheet-shaped bottom portion 341 and a side portion 342, and the bottom portion 341 and the side portion 342 form a groove structure, which will be low-pass.
  • the groove opening faces the cover plate 32.
  • the low-pass filter 34 may be other structures, such as no side portion 342, but only a bottom portion 341 having a sheet-like structure.
  • the low-pass filter 34 by designing the low-pass filter 34 as a sheet-like structure, the low-pass filter 34 can be made thinner, and has a smaller thickness and a smaller volume than the existing candied filter element. Therefore, the volume of the filter can be made smaller, which is advantageous for miniaturization of the device, and the structure is relatively simple compared to the sugar hoist filter element, which is advantageous for reducing the process requirement, and is easy to be mass-produced by the mold, thereby reducing the cost.
  • the filter is generally unable to mount the tuning element, so that the low-pass filter index is not adjustable, and the present invention Provided cavity filter Because the sheet-shaped low-pass filter is small in volume, the tuning element can be mounted on the cover plate to realize the adjustable index of the low-pass filter.
  • FIG. 6 and FIG. 3 is a schematic perspective view of another embodiment of the cavity filter of the present invention
  • FIG. 7 is a schematic cross-sectional view of the cavity filter shown in FIG. 6 along the CD line, wherein elements of the same reference numerals have the same function.
  • the cavity filter includes a cavity 31, a cover plate 32, a connector 33, and a sheet-shaped low-pass filter 34 that covers the cavity 31 to form a resonant cavity 311.
  • the low-pass filter 34 is located in the cavity 311 and is fixed in the cavity 31 by an insulating fixing member 35 and connected to the two connectors 33.
  • the cavity filter further includes a tap piece 36, a tuning element 37, and an insulating spacer 38.
  • the two ends of the low-pass filter 34 are connected to the connector 33 through the tap pieces 36, respectively.
  • the low pass filter 34 and the tap piece 36 may be connected by soldering, screwing or riveting.
  • the low-pass filter 34 may be directly connected to the connector 33 by soldering or the like.
  • the low-pass filter 34 is a sheet-like structure having a flat surface.
  • the low-pass filter 34 may be a sheet-like structure having a non-flat surface according to actual needs.
  • the cover 32 is provided with a through hole 321 , and the tuning element 37 is inserted into the through hole 321 of the cover 32 .
  • There is a predetermined distance between the low-pass filter 34 and the cover 32 that is, there is a certain space between the low-pass filter 34 and the cover 32, so that the tuning element 37 can be inserted into the cover 32 and the low-pass filter 34.
  • the length of the tuning element 37 between and between the insertion cover 32 and the low pass filter 34 is adjustable. Thus, by controlling the length of the tuning element 37 to be inserted between the cover 32 and the low-pass filter 34, the performance index of the cavity filter can be adjusted, so that the application range of the cavity filter is wider.
  • the end of the tuning element 37 can be inserted into the groove structure formed by the bottom 341 and the side portion 342 to further enhance the tuning effect.
  • the tuning element 37 is a tuning screw
  • the through hole 321 on the cover 32 is a screw hole adapted to the tuning screw, whereby the tuning screw can be fixed on the cover 32, and the tuning screw can be screwed in as needed Inside the cavity 31 to increase the length of the tuning screw between the cover 32 and the low pass filter 34, or to rotate the tuning screw out of the cavity 31 to reduce tuning between the cover 32 and the low pass filter 34.
  • the length of the screw which allows adjustment of the RF signal of the cavity filter.
  • the number of tuning screws is four, and of course, one, two or more, and the number of through holes 321 on the cover 32 is the same as the number of tuning screws.
  • the tuning screw can be made of metal.
  • the tuning element can also be other conductive conductors, for example, a conductive layer can be applied to the outer surface of the insulating base to form the tuning element.
  • the tuning element can also be fixed to the cover by other means.
  • two clamping blocks can be arranged on the upper surface of the cover to clamp the tuning element. When the tuning element needs to be inserted or removed from the cavity, two The tuning element can be moved by the release of the clamp, and the two clamps are clamped to the tuning element to fix the tuning element when the tuning element is not required to be moved.
  • the cavity 31 is a metal cavity
  • the insulating fixture 35 is an insulated plastic screw
  • the bottom of the low-pass filter 34 and the cavity 31 are provided with screw holes matched with the plastic screws.
  • the low-pass filter 34 and the cavity 31 are screwed by the plastic screw, thereby fixing the low-pass filter 34 to the cavity 31.
  • the low-pass filter 34 and the cavity 31 are fixed to each other by using the insulating fixing member 35 to prevent the low-pass filter 34 from being electrically connected to the metal cavity 31 through the insulating fixing member 35, thereby preventing the cavity 31 from affecting the low-pass filter. 34 performance.
  • the insulating spacer 38 is disposed between the low-pass filter 34 and the bottom of the cavity 31.
  • the insulating spacer 38 may be a polytetrafluoroethylene (PTFE) plastic spacer or a spacer formed of other insulating materials, and the thickness of the insulating spacer 38 may be set according to the parameters of the low-pass filter 34.
  • PTFE polytetrafluoroethylene
  • the thickness of the insulating spacer 38 may be set according to the parameters of the low-pass filter 34.
  • the low-pass filter 34 and the bottom of the cavity 31 may also be suspended, that is, no spacer is needed between the two, as long as the low-pass filter 34 and the bottom of the cavity 31 are insulated.
  • the low-pass filter 34 can be made less likely to be offset, which is lower than that of the conventional method of pressing the filter element by the cover.
  • the stability and reliability of the pass filter 34 also make the intermodulation parameters more stable.
  • fixing the low-pass filter 34 using a plastic screw it is not necessary to rely on the fixing of the cover plate, so that the cavity in the filter 34 and the cavity 31 does not need to be strictly matched as in the prior art, thereby reducing the low Through the tolerance requirements of the size of the filter 34 and the cavity 31, it is easier to meet the tolerance requirements.
  • the low-pass filter 34 can also be fixed in other fixed manners, for example, an insulating snap-fit structure is provided at the bottom of the cavity 31 to fix the low-pass filter, or the adhesive bonding is low.
  • the pass filter is fixed on the insulating spacer, and the insulating spacer is fixed to the bottom of the cavity, thereby realizing the fixing of the low-pass filter.
  • the communication radio frequency device 80 includes a signal transceiving circuit portion 81 in which the cavity filter described in any of the foregoing embodiments is disposed.
  • the communication radio frequency device 80 may be a simplex device, or may be a duplexer, or a splitter, or a combiner or a tower amplifier.

Landscapes

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

Abstract

一种腔体滤波器及通信射频器件，所述腔体滤波器包括腔体、盖板、连接器以及片状的低通滤波片；所述盖板封盖所述腔体形成谐振腔；所述低通滤波片通过绝缘固定件固定在所述腔体内，并与所述连接器连接。能够减小滤波器的体积，降低工艺要求。

Description

一种腔体滤波器及通信射频器件
【技术领域】
本发明涉及电子技术领域，特别是涉及一种腔体滤波器及通信射频器件。
【背景技术】
低通滤波器是容许低于截止频率的信号通过，而高于截止频率的信号不能通过的一种元器件或者电子线路组合，其广泛应用于各类电子设备，是大部分电路中必不可少的器件之一。
参阅图1和图2，现有的低通滤波器中，通常包括腔体11、低通滤波元件12、热缩套管13、盖板14以及连接器15。低通滤波元件12通常为糖葫芦式的低通，外部使用热缩套管13包围，然后放置在腔体11内，再通过盖板14压紧，以将低通滤波元件12固定在腔体11内。低通滤波元件12的两端分别与连接器15连接，从而信号自其中一个连接器15输入至低通滤波元件12，经过低通滤波元件12的滤波作用后，经过另一个连接器15输出。
然而，上述低通滤波器中，如图2中所示，低通滤波元件12采用的是糖葫芦式滤波器，为高低起伏的阶梯状，体积较大，结构较为复杂，不利于低通滤波器的小型化，且制造工艺较为复杂，不利于成本降低。
【发明内容】
本发明主要解决的技术问题是提供一种腔体滤波器及通信射频器件，有利于减小滤波器的体积，且能够降低滤波器的制造工艺要求。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种腔体滤波器，包括腔体、盖板、连接器以及片状的低通滤波片；所述盖板封盖所述腔体形成谐振腔；所述低通滤波片通过绝缘固定件固定在所述腔体内，并与所述连接器连接。
其中，腔体滤波器还包括调谐元件，所述盖板上设有贯穿孔，所述调谐元件插设于所述盖板的贯穿孔中，所述低通滤波片与所述盖板之间具有预定距离，以使得所述调谐元件可插入所述盖板和所述低通滤波片之间，且插入所述盖板和所述低通滤波片之间的调谐元件的长度可调。
其中，所述低通滤波片包括片状的底部和侧部，所述底部和侧部形成凹槽结构，所述调谐元件末端能够插入所述凹槽结构内。
其中，所述调谐元件为调谐螺钉，所述盖板上的贯穿孔为与所述调谐螺钉相适配的螺孔。
其中，所述调谐螺钉的数量为四个，所述盖板上的贯穿孔的数量也为四个。
其中，所述低通滤波片的表面平整。
其中，所述绝缘固定件为塑胶螺钉，所述低通滤波片和所述腔体均设有与所述塑胶螺钉相匹配的螺孔，以实现将所述低通滤波片固定在所述腔体内。
其中，所述低通滤波片和所述腔体的底部之间设有绝缘垫片。
其中，所述绝缘垫片为聚四氟乙烯塑料垫片。
其中，所述低通滤波片和所述腔体的底部之间为悬空。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种通信射频器件，所述通信射频器件包括腔体滤波器，所述腔体滤波器设于所述通信射频器件的信号收发电路部分，用于对信号进行选择，所述通信射频器件为单工器、或双工器、或分路器、或合路器或塔顶放大器；所述腔体滤波器包括腔体、盖板、连接器以及片状的低通滤波片；所述盖板封盖所述腔体形成谐振腔；所述低通滤波片通过绝缘固定件固定在所述腔体内，并与所述连接器连接。
其中，腔体滤波器还包括调谐元件，所述盖板上设有贯穿孔，所述调谐元件插设于所述盖板的贯穿孔中，所述低通滤波片与所述盖板之间具有预定距离，以使得所述调谐元件可插入所述盖板和所述低通滤波片之间，且插入所述盖板和所述低通滤波片之间的调谐元件的长度可调。
其中，所述低通滤波片包括片状的底部和侧部，所述底部和侧部形成凹槽结构，所述调谐元件末端能够插入所述凹槽结构内。
其中，所述调谐元件为调谐螺钉，所述盖板上的贯穿孔为与所述调谐螺钉相适配的螺孔。
其中，所述调谐螺钉的数量为四个，所述盖板上的贯穿孔的数量也为四个。
其中，所述低通滤波片的表面平整。
其中，所述绝缘固定件为塑胶螺钉，所述低通滤波片和所述腔体均设有与所述塑胶螺钉相匹配的螺孔，以实现将所述低通滤波片固定在所述腔体内。
其中，所述低通滤波片和所述腔体的底部之间设有绝缘垫片。
其中，所述绝缘垫片为聚四氟乙烯塑料垫片。
其中，所述低通滤波片和所述腔体的底部之间为悬空。
本发明的有益效果是：区别于现有技术的情况，本发明的腔体滤波器中，通过将低通滤波片设置为片状的滤波片，与现有的糖葫芦形滤波元件相比，片状结构的滤波片体积更小，且结构更为简单，有利于减小滤波器的体积，同时能够简化工艺，且片状的滤波片更容易通过模具批量加工，有利于降低成本。
【附图说明】
图1是现有技术中一种低通滤波器的截面示意图；
图2是图1所示的糖葫芦式的低通滤波元件的立体结构示意图；
图3是本发明的腔体滤波器一实施方式的立体结构示意图；
图4是图3所示的腔体滤波器沿AB线的截面示意图；
图5是图3所示的腔体滤波器中，低通滤波片的立体结构示意图；
图6是本发明腔体滤波器另一实施方式的立体结构示意图；
图7是图6所示的腔体滤波器沿CD线的截面示意图；
图8是本发明通信射频器件一实施方式的结构示意图。
【具体实施方式】
下面将结合附图和实施方式对本发明进行详细说明。
参阅图3至图5，在本发明腔体滤波器的一实施方式中，腔体滤波器包括腔体31、盖板32、连接器33以及片状的低通滤波片34。
举例来说，在本实施例中连接器33的数量为二，分别设置在腔体31的两端，当然连接器33的数量不限于此。盖板32封盖腔体31以形成谐振腔311。其中，低通滤波片34位于谐振腔311内，且低通滤波片34通过绝缘固定件35固定在腔体31内，并与两个连接器33连接。由此，信号从其中一个连接器33输入，经过低通滤波片34的滤波作用后，从另一个连接器33输出，从而实现腔体滤波器的滤波作用。
在一种实施方式中，低通滤波片34的结构可以是如图5所示的结构，包括片状的底部341和侧部342，底部341和侧部342形成凹槽结构，在将低通滤波片34安装于谐振腔311中时，凹槽开口朝向盖板32。当然，在其他实施方式中，低通滤波片34也可以是其它结构，例如不设置侧部342，而仅是具有呈片状结构的底部341。
本实施方式中，通过将低通滤波片34设计为片状结构，使得低通滤波片34可以制作得更薄，与现有的糖葫芦式滤波元件相比，厚度较小，具有更小的体积，因而可以使得滤波器的体积更小，有利于器件的小型化，且相对糖葫芦式滤波元件而言，结构较为简单，有利于降低工艺要求，容易通过模具批量加工生产，能够降低成本。
另外，在现有技术中，由于糖葫芦状的低通滤波元件体积较大，而且需要盖板压紧，导致滤波器一般的不能够安装调谐元件，使得低通滤波器指标不可调，而本发明提供的腔体滤波器由于片状的低通滤波片体积较小，则可以在盖板上安装调谐元件，实现低通滤波器的指标可调，具体请参阅图6和图7，图6是本发明腔体滤波器另一实施方式的立体结构示意图，图7是图6所示的腔体滤波器沿CD线的截面示意图，其中图中相同标号的元件作用相同。在本实施方式中，腔体滤波器包括腔体31、盖板32、连接器33以及片状的低通滤波片34，盖板32封盖腔体31以形成谐振腔311。低通滤波片34位于谐振腔311内，且通过绝缘固定件35固定在腔体31内，并与两个连接器33连接。进一步地，腔体滤波器还包括抽头片36、调谐元件37以及绝缘垫片38。
其中，低通滤波片34的两端分别通过抽头片36与连接器33连接。低通滤波片34与抽头片36可以通过焊接、螺接或铆接等方式进行连接。当然，其他实施方式中，低通滤波片34也可以是直接与连接器33通过焊接等方式连接在一起。
其中，低通滤波片34为表面平整的片状结构，当然也可以根据实际需要使得低通滤波片34为表面非平整的片状结构。
继续参阅图7，本实施方式中，盖板32上设有贯穿孔321，调谐元件37插设于盖板32的贯穿孔中321中。其中，低通滤波片34和盖板32之间具有预定距离，即低通滤波片34和盖板32之间存在一定的空间，以使得调谐元件37可插入盖板32和低通滤波片34之间，并且插入盖板32和低通滤波片34之间的调谐元件37的长度可调。由此，通过控制调谐元件37插入盖板32和低通滤波片34之间的长度，可实现腔体滤波器的性能指标可调，使得腔体滤波器的应用范围更广。
优选的，如果低通滤波片34为图5所示的结构，则调谐元件37的末端可以插入底部341和侧部342形成的凹槽结构内，进一步增强调谐效果。
其中，调谐元件37为调谐螺钉，盖板32上的贯穿孔321为与调谐螺钉相适配的螺孔，由此可以将调谐螺钉固定于盖板32上，并且可以根据需要将调谐螺钉旋进腔体31内以增加位于盖板32和低通滤波片34之间的调谐螺钉的长度，或者将调谐螺钉旋出腔体31以减小位于盖板32和低通滤波片34之间的调谐螺钉的长度，由此可实现对腔体滤波器射频指标的调整。其中，调谐螺钉的数量为四个，当然也可以是一个、两个或更多个，盖板32上的贯穿孔321的数量与调谐螺钉的数量相同。
本实施例中，调谐螺钉可以为金属制成。
在其他实施方式中，调谐元件也可以是其他具有导电性的导体，例如可以是在绝缘基座的外表面涂覆一层导电层以形成调谐元件。此外，调谐元件也可以通过其他方式固定在盖板上，例如可以在盖板的上表面设置两个夹块以夹住调谐元件，当需要将调谐元件插入或拔出腔体时，使两个夹块松开即可移动调谐元件，当不需要移动调谐元件时使两个夹块夹住调谐元件以固定调谐元件。
继续参阅图7，本实施方式中，腔体31为金属腔体，绝缘固定件35为绝缘的塑胶螺钉，低通滤波片34和腔体31的底部均设有与塑胶螺钉相匹配的螺孔，从而通过塑胶螺钉将低通滤波片34和腔体31进行螺接，从而将低通滤波片34与腔体31固定。通过使用绝缘固定件35将低通滤波片34和腔体31相互固定，以避免低通滤波片34通过绝缘固定件35与金属的腔体31电连接，进而避免腔体31影响低通滤波片34的性能。
其中，低通滤波片34和腔体31的底部之间设有绝缘垫片38。绝缘垫片38可以是聚四氟乙烯（PTFE）塑料垫片，或其他绝缘材料形成的垫片，且绝缘垫片38的厚度可以根据低通滤波片34的参数进行设定。通过绝缘垫片38，可以较准确保证低通滤波片34和腔体31底部之间的距离，提高精度。当然，低通滤波片34和腔体31的底部之间也可以是悬空，即两者之间不需要垫片，只要确保低通滤波片34和腔体31底部绝缘即可。
本实施方式中，通过将低通滤波片34使用塑胶螺钉进行固定，与现有的通过盖板压紧滤波元件的方式相比，能够使得低通滤波片34不容易发生偏移，提高了低通滤波片34的稳定性和可靠性，也使得互调参数更稳定。并且，通过使低通滤波片34使用塑胶螺钉进行固定，不需要依靠盖板的固定，因此滤波片34与腔体31内的空腔不需要如现有技术一样严格匹配，由此可降低低通滤波片34、腔体31大小的公差要求，因此更容易达到公差要求。
当然，在其他实施方式中，低通滤波片34也可以采用其他固定方式固定滤波片，例如在腔体31底部设置绝缘卡扣结构固定低通滤波片，或者通过绝缘胶粘接的方式将低通滤波片固定在绝缘垫片上，并使绝缘垫片固定于腔体底部，从而实现低通滤波片的固定。
参阅图8，在本发明通信射频器件的一实施方式中，通信射频器件80包括信号收发电路部分81，其中信号收发电路部分81中设置有前述任一实施方式所述的腔体滤波器。
其中通信射频器件80可以是单工器，或者也可以是双工器、或分路器、或合路器或塔顶放大器。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种腔体滤波器，其特征在于，包括腔体、盖板、连接器以及片状的低通滤波片；
    所述盖板封盖所述腔体形成谐振腔；
    所述低通滤波片通过绝缘固定件固定在所述腔体内，并与所述连接器连接。
  2. 根据权利要求1所述的腔体滤波器，其特征在于，还包括调谐元件，所述盖板上设有贯穿孔，所述调谐元件插设于所述盖板的贯穿孔中，所述低通滤波片与所述盖板之间具有预定距离，以使得所述调谐元件可插入所述盖板和所述低通滤波片之间，且插入所述盖板和所述低通滤波片之间的调谐元件的长度可调。
  3. 根据权利要求2所述的腔体滤波器，其特征在于，所述低通滤波片包括片状的底部和侧部，所述底部和侧部形成凹槽结构，所述调谐元件末端能够插入所述凹槽结构内。
  4. 根据权利要求2所述的腔体滤波器，其特征在于，所述调谐元件为调谐螺钉，所述盖板上的贯穿孔为与所述调谐螺钉相适配的螺孔。
  5. 根据权利要求4所述的腔体滤波器，其特征在于，所述调谐螺钉的数量为四个，所述盖板上的贯穿孔的数量也为四个。
  6. 根据权利要求1所述的腔体滤波器，其特征在于，所述低通滤波片的表面平整。
  7. 根据权利要求1所述的腔体滤波器，其特征在于，所述绝缘固定件为塑胶螺钉，所述低通滤波片和所述腔体均设有与所述塑胶螺钉相匹配的螺孔，以实现将所述低通滤波片固定在所述腔体内。
  8. 根据权利要求1所述的腔体滤波器，其特征在于，所述低通滤波片和所述腔体的底部之间设有绝缘垫片。
  9. 根据权利要求8所述的腔体滤波器，其特征在于，所述绝缘垫片为聚四氟乙烯塑料垫片。
  10. 根据权利要求1所述的腔体滤波器，其特征在于，所述低通滤波片和所述腔体的底部之间为悬空。
  11. 一种通信射频器件，其特征在于，所述通信射频器件腔体滤波器，所述腔体滤波器设于所述通信射频器件的信号收发电路部分，用于对信号进行选择，所述通信射频器件为单工器、或双工器、或分路器、或合路器或塔顶放大器；
    其中，所述腔体滤波器包括腔体、盖板、连接器以及片状的低通滤波片；
    所述盖板封盖所述腔体形成谐振腔；
    所述低通滤波片通过绝缘固定件固定在所述腔体内，并与所述连接器连接。
  12. 根据权利要求11所述的通信射频器件，其特征在于，所述腔体滤波器还包括调谐元件，所述盖板上设有贯穿孔，所述调谐元件插设于所述盖板的贯穿孔中，所述低通滤波片与所述盖板之间具有预定距离，以使得所述调谐元件可插入所述盖板和所述低通滤波片之间，且插入所述盖板和所述低通滤波片之间的调谐元件的长度可调。
  13. 根据权利要求12所述的通信射频器件，其特征在于，所述低通滤波片包括片状的底部和侧部，所述底部和侧部形成凹槽结构，所述调谐元件末端能够插入所述凹槽结构内。
  14. 根据权利要求12所述的通信射频器件，其特征在于，所述调谐元件为调谐螺钉，所述盖板上的贯穿孔为与所述调谐螺钉相适配的螺孔。
  15. 根据权利要求14所述的通信射频器件，其特征在于，所述调谐螺钉的数量为四个，所述盖板上的贯穿孔的数量也为四个。
  16. 根据权利要求11所述的通信射频器件，其特征在于，所述低通滤波片的表面平整。
  17. 根据权利要求11所述的通信射频器件，其特征在于，所述绝缘固定件为塑胶螺钉，所述低通滤波片和所述腔体均设有与所述塑胶螺钉相匹配的螺孔，以实现将所述低通滤波片固定在所述腔体内。
  18. 根据权利要求11所述的通信射频器件，其特征在于，所述低通滤波片和所述腔体的底部之间设有绝缘垫片。
  19. 根据权利要求18所述的通信射频器件，其特征在于，所述绝缘垫片为聚四氟乙烯塑料垫片。
  20. 根据权利要求11所述的通信射频器件，其特征在于，所述低通滤波片和所述腔体的底部之间为悬空。
PCT/CN2015/099818 2015-12-30 2015-12-30 一种腔体滤波器及通信射频器件 WO2017113164A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2015/099818 WO2017113164A1 (zh) 2015-12-30 2015-12-30 一种腔体滤波器及通信射频器件
CN201580079837.2A CN107615574A (zh) 2015-12-30 2015-12-30 一种腔体滤波器及通信射频器件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/099818 WO2017113164A1 (zh) 2015-12-30 2015-12-30 一种腔体滤波器及通信射频器件

Publications (1)

Publication Number Publication Date
WO2017113164A1 true WO2017113164A1 (zh) 2017-07-06

Family

ID=59224257

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/099818 WO2017113164A1 (zh) 2015-12-30 2015-12-30 一种腔体滤波器及通信射频器件

Country Status (2)

Country Link
CN (1) CN107615574A (zh)
WO (1) WO2017113164A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110061334A (zh) * 2019-04-04 2019-07-26 广东通宇通讯股份有限公司 一种侧向调节的滤波器结构
CN110690551A (zh) * 2019-11-01 2020-01-14 大连海事大学 全频段双层梯形数字电视发射天线
CN112670683A (zh) * 2019-10-15 2021-04-16 深圳市大富科技股份有限公司 腔体滤波器及其盖板以及通信设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111033884B (zh) * 2018-08-09 2022-07-26 大富科技(安徽)股份有限公司 一种滤波器、双工器及通信设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6570472B1 (en) * 1999-06-29 2003-05-27 Filtronic Lk Oy Low-pass filter
CN103311607A (zh) * 2012-03-15 2013-09-18 成都赛纳赛德科技有限公司 一种腔体宽度变化的低通滤波器
CN103311605A (zh) * 2012-03-15 2013-09-18 成都赛纳赛德科技有限公司 一种低通滤波器
CN104201451A (zh) * 2014-09-01 2014-12-10 南京理工大学 一种新型带状线结构的高频低通滤波器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102569978A (zh) * 2011-12-20 2012-07-11 摩比天线技术（深圳）有限公司 一种介质谐振器调谐结构及调谐方法
CN202839920U (zh) * 2012-10-10 2013-03-27 武汉凡谷电子技术股份有限公司 低损耗te介质带阻滤波器
CN105470617B (zh) * 2014-09-10 2019-07-02 罗森伯格技术（昆山）有限公司 双模谐振器
CN205355219U (zh) * 2015-12-30 2016-06-29 深圳市大富科技股份有限公司 一种腔体滤波器及通信射频器件
CN206116575U (zh) * 2016-08-30 2017-04-19 广东通宇通讯股份有限公司 一种滤波器及其耦合结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6570472B1 (en) * 1999-06-29 2003-05-27 Filtronic Lk Oy Low-pass filter
CN103311607A (zh) * 2012-03-15 2013-09-18 成都赛纳赛德科技有限公司 一种腔体宽度变化的低通滤波器
CN103311605A (zh) * 2012-03-15 2013-09-18 成都赛纳赛德科技有限公司 一种低通滤波器
CN104201451A (zh) * 2014-09-01 2014-12-10 南京理工大学 一种新型带状线结构的高频低通滤波器

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110061334A (zh) * 2019-04-04 2019-07-26 广东通宇通讯股份有限公司 一种侧向调节的滤波器结构
CN110061334B (zh) * 2019-04-04 2024-06-04 广东通宇通讯股份有限公司 一种侧向调节的滤波器结构
CN112670683A (zh) * 2019-10-15 2021-04-16 深圳市大富科技股份有限公司 腔体滤波器及其盖板以及通信设备
CN110690551A (zh) * 2019-11-01 2020-01-14 大连海事大学 全频段双层梯形数字电视发射天线
CN110690551B (zh) * 2019-11-01 2024-03-15 大连海事大学 全频段双层梯形数字电视发射天线

Also Published As

Publication number Publication date
CN107615574A (zh) 2018-01-19

Similar Documents

Publication Publication Date Title
WO2017113164A1 (zh) 一种腔体滤波器及通信射频器件
US5631807A (en) Electronic circuit structure with aperture suspended component
US7200010B2 (en) Impedance qualization module
WO2018161752A1 (zh) 终端
US5212754A (en) Optical laser connector
WO2013044743A1 (zh) 通信腔体器件及其椭圆函数型低通滤波通路
WO2012070698A1 (ko) 공진회로를 구비한 비가역 회로소자 및 그의 제조 방법
WO2017015995A1 (zh) 腔体滤波器、射频拉远设备、信号收发装置及双工器
CN104579220A (zh) 多层陶瓷介质片式低通滤波器
WO2018066790A1 (ko) 무선 주파수 필터
WO2014019243A1 (zh) 一种背光模组及液晶显示器
US20030107448A1 (en) Surface mountable circulator/isolator and assembly technique
WO2010071304A2 (ko) 커플링을 이용한 전력 분배기
CN101609914A (zh) 一种ltcc谐波抑制带通滤波器
WO2014075628A1 (zh) 一种可调谐耦合装置及射频通信装置
CN207925641U (zh) 小型化的Ka频段功率合成模块
WO2011111888A1 (ko) 일체형 커플러-써큘레이터 및 그를 포함하는 전력 증폭기
WO2016106635A1 (zh) 腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器
WO2016106642A1 (zh) 腔体滤波器、连接器、双工器以及射频拉远设备
WO2016106551A1 (zh) 腔体滤波器及具有该腔体滤波器的射频拉远设备、信号收发装置和塔顶放大器
CN107615577A (zh) 谐振杆组件、腔体滤波器及包括该腔体滤波器的通信设备
WO2015101216A1 (zh) 腔体滤波器及其盖板
WO2016106550A1 (zh) 腔体滤波器及具有该腔体滤波器的射频拉远设备、信号收发装置和塔顶放大器
WO2020054964A1 (ko) 세라믹 도파관 필터
WO2017113222A1 (zh) Tm模介质滤波器及通信射频器件

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15911793

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15911793

Country of ref document: EP

Kind code of ref document: A1