WO2016090999A1 - Radio frequency shielding box - Google Patents

Radio frequency shielding box Download PDF

Info

Publication number
WO2016090999A1
WO2016090999A1 PCT/CN2015/091316 CN2015091316W WO2016090999A1 WO 2016090999 A1 WO2016090999 A1 WO 2016090999A1 CN 2015091316 W CN2015091316 W CN 2015091316W WO 2016090999 A1 WO2016090999 A1 WO 2016090999A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio frequency
box body
frequency shielding
dielectric plate
shielding box
Prior art date
Application number
PCT/CN2015/091316
Other languages
French (fr)
Chinese (zh)
Inventor
王富强
王智一
王晖
张向峰
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 WO2016090999A1 publication Critical patent/WO2016090999A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the embodiments of the present invention relate to, but are not limited to, the field of electronic device technologies, and in particular, to a radio frequency shielding box body.
  • the RF shielding box is one of the main components of the power amplifier and the transmitter. In these RF modules, the RF energy is prevented from leaking to the outside, and the base station equipment is tested by EMC (Electro Magnetic Compatibility).
  • EMC Electro Magnetic Compatibility
  • the definition of the RF shielding box body to ensure that the system does not radiate electromagnetic waves by forming a closed electromagnetic space.
  • the shielding performance and the influence of the cavity formed by the box and the PCB on the RF circuit are the two most important performance indicators of the RF shielding box.
  • the shielding performance mainly focuses on the electrical sealing of the box.
  • the influence of the cavity on the RF circuit mainly depends on the reflection intensity of the RF signal. The higher the cavity, the smaller the influence of the reflected signal on the RF module itself, and the better the RF performance. achieve. In the related art, there is no RF shielding case that is reduced in size without affecting system performance.
  • the embodiment of the present invention provides a radio frequency shielding box body, which can solve the radio frequency screen in the related art.
  • the problem of performance and volume in the cover box cannot be balanced.
  • the utility model provides a radio frequency shielding box body, including:
  • a dielectric plate is mounted in the body of the case, above the components on the PCB.
  • the box body is provided with a plurality of cavities, and each cavity corresponds to a functional module on the PCB board.
  • the media sheet is mounted within one or more cavities.
  • the materials of the dielectric sheets in each of the cavities are the same or different.
  • the dielectric plate is mounted in a corresponding cavity of the radio frequency module.
  • the dielectric plate is mounted within a corresponding cavity of the power amplifier module.
  • the body of the box is a metal shielding box body.
  • the material of the metal shielding box body is aluminum.
  • the dielectric plate is made of a non-metallic material.
  • the dielectric plate has a dielectric constant greater than one.
  • the embodiment of the utility model can effectively reduce the volume of the RF shielding box body under the premise of ensuring the electrical performance index of the RF shielding box by installing the dielectric plate in the body of the box body, and has the advantages of small volume, simple debugging, good shielding, etc. advantage.
  • FIG. 1 is a schematic structural view of a radio frequency shielding box body in an embodiment of the present invention.
  • the embodiment of the present invention provides a novel design of a radio frequency shielding box body for reducing the volume of a radio frequency module.
  • the radio frequency shielding box body is a combination of a metal cover and a certain dielectric material, wherein the radio frequency cavity effect can be designed only. This design is applied in a relatively large place, and the purpose of reducing the volume under the premise of ensuring performance is achieved.
  • the radio frequency shielding box body of the embodiment of the present invention includes:
  • the box body 10 is mounted on the PCB board and forms a closed shielding space together with the PCB board to enclose the components on the PCB board in the shielding space;
  • the dielectric plate 20 is mounted in the casing body 10 above the components on the PCB board.
  • the box body 10 is provided with a plurality of cavities 101, each of which corresponds to a functional module on the PCB board.
  • the dielectric plate 20 is mounted within one or more of the cavities 101.
  • the same dielectric plate 20 may be mounted in each of the cavities 101, and the dielectric plates 20 made of different materials may be mounted.
  • the dielectric plate 20 can be installed only in a place where the RF cavity effect is relatively large.
  • the dielectric plate 20 is installed in the cavity 101 corresponding to the RF module, and/or is installed in a cavity corresponding to the power amplifier module. 101.
  • the casing body 10 is a metal shielding box body, and the material is usually aluminum.
  • the dielectric plate 20 is made of a non-metallic material having a dielectric constant greater than one.
  • the radio frequency shielding box body of the embodiment of the present invention can effectively reduce the volume of the power amplifier module, and provides favorable guarantee for miniaturization of the RRU (Remote Radio Unit), and can also greatly reduce the effect caused by the cavity effect.
  • the difficulty of design evaluation of power amplifiers provides strong support for rapid evaluation of power amplifier solutions, shortens product development cycle, and flexibly adjusts the layout of power amplifiers and other RF modules to effectively promote integrated large-board design.
  • the radio frequency shielding box body of the embodiment of the present invention is mainly applied to the radio frequency large signal area of the base station, and has certain effects on the radiation protection, heat dissipation, waterproof, moisture proof and insect prevention of the base station.
  • the radio frequency shielding box body of the embodiment of the present invention can effectively reduce the volume of the power amplifier module, and provide favorable guarantee for miniaturization of the RRU; and can also greatly reduce the difficulty of designing the power amplifier design due to the cavity effect, and quickly evaluate the power amplifier.
  • the solution provides strong support to shorten the product development cycle; it also flexibly adjusts the layout of power amplifiers and other RF modules to effectively promote integrated slab design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

Disclosed is a radio frequency shielding box, comprising: a box body (10) installed on a printed circuit board (PCB) and forming, together with the PCB, a closed space in which components on the PCB are located; and a dielectric plate (20) installed in the box body and located above the components on the PCB.

Description

一种射频屏蔽盒体Radio frequency shielding box body 技术领域Technical field
本实用新型实施例涉及但不限于电子设备技术领域，尤其涉及一种射频屏蔽盒体。The embodiments of the present invention relate to, but are not limited to, the field of electronic device technologies, and in particular, to a radio frequency shielding box body.
背景技术Background technique
随着无线通讯***的发展，客户对于基站设备的体积要求越来越高，要求基站在保持原有性能的同时，体积要求变为原来的一半，甚至更小。射频模块在基站上占有相当大的体积，缩小射频模块的体积成为无线开发中的一个热点。With the development of wireless communication systems, customers are increasingly demanding the size of base station equipment, requiring the base station to maintain its original performance while reducing its volume requirements to half or even less. The RF module occupies a considerable volume on the base station, and reducing the size of the RF module has become a hot spot in wireless development.
射频屏蔽盒体是功放和发射机的主要组成部分之一，在这些射频模块中起到防止射频能量向外部泄漏的功能，保证基站设备通过EMC(Electro Magnetic Compatibility，电磁兼容性)测试。盒体和PCB(Printed Circuit Board，印制电路板)中间的空气层占据了功放和其他一些射频模块的很大一部分体积，缩小盒体的体积是缩小功放体积的一个重要方向，强制缩小盒体的体积可能会带来***性能的下降。The RF shielding box is one of the main components of the power amplifier and the transmitter. In these RF modules, the RF energy is prevented from leaking to the outside, and the base station equipment is tested by EMC (Electro Magnetic Compatibility). The air layer between the box and the PCB (Printed Circuit Board) occupies a large part of the volume of the power amplifier and other RF modules. Reducing the volume of the box is an important direction to reduce the volume of the amplifier, forcing the box to shrink. The volume may cause a drop in system performance.
射频屏蔽盒体的定义：通过构成一个封闭的电磁空间来保证***不对外辐射电磁波。屏蔽性能的好坏，以及盒体与PCB所构成腔体对于射频电路的影响是射频屏蔽盒体最重要的两个性能指标。屏蔽性能主要关注盒体的电密封性，腔体对射频电路的影响主要取决于对射频信号的反射强弱上，腔体越高，反射信号对射频模块本身的影响越小，射频性能越好实现。相关技术中，没有一种在不影响***性能前提下缩小体积的射频屏蔽盒体。The definition of the RF shielding box body: to ensure that the system does not radiate electromagnetic waves by forming a closed electromagnetic space. The shielding performance and the influence of the cavity formed by the box and the PCB on the RF circuit are the two most important performance indicators of the RF shielding box. The shielding performance mainly focuses on the electrical sealing of the box. The influence of the cavity on the RF circuit mainly depends on the reflection intensity of the RF signal. The higher the cavity, the smaller the influence of the reflected signal on the RF module itself, and the better the RF performance. achieve. In the related art, there is no RF shielding case that is reduced in size without affecting system performance.
实用新型内容Utility model content
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.
本实用新型实施例提供一种射频屏蔽盒体，可以解决相关技术中射频屏 蔽盒体中性能与体积不能兼顾的问题。The embodiment of the present invention provides a radio frequency shielding box body, which can solve the radio frequency screen in the related art. The problem of performance and volume in the cover box cannot be balanced.
实用新型实施例提供一种射频屏蔽盒体，包括：The utility model provides a radio frequency shielding box body, including:
盒体本体，安装在印制电路板PCB板上，与所述PCB板一起构成一个封闭空间，所述PCB板上的元器件位于所述封板空间内；以及a box body mounted on the printed circuit board PCB board, together with the PCB board, forming an enclosed space, wherein components on the PCB board are located in the board space;
介质板，安装在所述盒体本体内，位于所述PCB板上的元器件上方。A dielectric plate is mounted in the body of the case, above the components on the PCB.
可选地，所述盒体本体上设置有多个空腔，每个空腔都对应所述PCB板上的一个功能模块。Optionally, the box body is provided with a plurality of cavities, and each cavity corresponds to a functional module on the PCB board.
可选地，所述介质板安装在一个或多个空腔内。Optionally, the media sheet is mounted within one or more cavities.
可选地，当所述介质板安装在多个空腔内时，每个空腔内的介质板的材料相同或不同。Alternatively, when the dielectric sheets are mounted in a plurality of cavities, the materials of the dielectric sheets in each of the cavities are the same or different.
可选地，所述介质板安装在射频模块对应的空腔内。Optionally, the dielectric plate is mounted in a corresponding cavity of the radio frequency module.
可选地，所述介质板安装在功率放大器模块对应的空腔内。Optionally, the dielectric plate is mounted within a corresponding cavity of the power amplifier module.
可选地，所述盒体本体为金属屏蔽盒体。Optionally, the body of the box is a metal shielding box body.
可选地，所述金属屏蔽盒体的材料为铝。Optionally, the material of the metal shielding box body is aluminum.
可选地，所述介质板由非金属材料制成。Optionally, the dielectric plate is made of a non-metallic material.
可选地，所述介质板的介电常数大于1。Optionally, the dielectric plate has a dielectric constant greater than one.
本实用新型实施例通过在盒体本体内安装介质板，可以在保证射频屏蔽盒体电性能指标的前提下，有效的缩小射频屏蔽盒体的体积，具有体积小、调试简单、屏蔽性好等优点。The embodiment of the utility model can effectively reduce the volume of the RF shielding box body under the premise of ensuring the electrical performance index of the RF shielding box by installing the dielectric plate in the body of the box body, and has the advantages of small volume, simple debugging, good shielding, etc. advantage.
在阅读并理解了附图和详细描述后，可以明白其他方面。Other aspects will be apparent upon reading and understanding the drawings and detailed description.
附图概述BRIEF abstract
图1是本实用新型实施例中一种射频屏蔽盒体的结构示意图。1 is a schematic structural view of a radio frequency shielding box body in an embodiment of the present invention.
本实用新型的实施方式Embodiment of the present invention
以下结合附图对本实用新型实施例进行详细说明。 The embodiments of the present invention are described in detail below with reference to the accompanying drawings.
本实用新型实施例提供了一种新型的缩小射频模块体积的射频屏蔽盒体的设计方案，射频屏蔽盒体为金属盖和某种介质材料的合体，其中，可以设计为只在射频腔体效应比较大的地方应用这种设计，实现在保证性能的前提下缩小体积的目的。The embodiment of the present invention provides a novel design of a radio frequency shielding box body for reducing the volume of a radio frequency module. The radio frequency shielding box body is a combination of a metal cover and a certain dielectric material, wherein the radio frequency cavity effect can be designed only. This design is applied in a relatively large place, and the purpose of reducing the volume under the premise of ensuring performance is achieved.
如图1所示，本实用新型实施例的射频屏蔽盒体，包括：As shown in FIG. 1 , the radio frequency shielding box body of the embodiment of the present invention includes:
盒体本体10，安装在PCB板上，与PCB板一起构成一个封闭屏蔽空间，将PCB板上的元器件封闭在该屏蔽空间内；The box body 10 is mounted on the PCB board and forms a closed shielding space together with the PCB board to enclose the components on the PCB board in the shielding space;
介质板20，安装在盒体本体10内，位于PCB板上的元器件上方。The dielectric plate 20 is mounted in the casing body 10 above the components on the PCB board.
需要说明的是，图1中，为了便于表现盒体本体10的结构，以及介质板20在盒体本体10的安装位置，没有显示PCB板。It should be noted that, in FIG. 1, in order to facilitate the expression of the structure of the casing body 10 and the mounting position of the dielectric panel 20 at the casing body 10, the PCB board is not displayed.
可选地，盒体本体10上设置有多个空腔101，每个空腔101都对应所述PCB板上的一个功能模块。介质板20安装在一个或多个空腔101内。当介质板20安装在多个空腔101内时，每个空腔101内可以安装同一种介质板20，也可以安装不同材料制成的介质板20。通常情况下，可以只在射频腔体效应比较大的地方安装介质板20，例如，将介质板20安装在射频模块对应的空腔101内，和/或，安装在功率放大器模块对应的空腔101内。Optionally, the box body 10 is provided with a plurality of cavities 101, each of which corresponds to a functional module on the PCB board. The dielectric plate 20 is mounted within one or more of the cavities 101. When the dielectric plate 20 is mounted in the plurality of cavities 101, the same dielectric plate 20 may be mounted in each of the cavities 101, and the dielectric plates 20 made of different materials may be mounted. Generally, the dielectric plate 20 can be installed only in a place where the RF cavity effect is relatively large. For example, the dielectric plate 20 is installed in the cavity 101 corresponding to the RF module, and/or is installed in a cavity corresponding to the power amplifier module. 101.
可选地，盒体本体10为金属屏蔽盒体，通常情况下，材料为铝。Optionally, the casing body 10 is a metal shielding box body, and the material is usually aluminum.
可选地，介质板20由非金属材料制成，介电常数大于1。Alternatively, the dielectric plate 20 is made of a non-metallic material having a dielectric constant greater than one.
本实用新型实施例的射频屏蔽盒体，可以有效的减小功放模块的体积，为RRU(Remote Radio Unit，远端射频模块)的小型化提供有利保证；也可以大大减少由于腔体效应导致的功放设计评估的难度，为快速评估功放方案提供有力的支持，缩短产品研发周期；还可以灵活地调整功放和其他射频模块的布局，有力地推进一体化大板设计。本实用新型实施例的射频屏蔽盒体，主要应用在基站的射频大信号区域，对于基站的防辐射，散热，防水，防潮，防虫都有一定的作用。The radio frequency shielding box body of the embodiment of the present invention can effectively reduce the volume of the power amplifier module, and provides favorable guarantee for miniaturization of the RRU (Remote Radio Unit), and can also greatly reduce the effect caused by the cavity effect. The difficulty of design evaluation of power amplifiers provides strong support for rapid evaluation of power amplifier solutions, shortens product development cycle, and flexibly adjusts the layout of power amplifiers and other RF modules to effectively promote integrated large-board design. The radio frequency shielding box body of the embodiment of the present invention is mainly applied to the radio frequency large signal area of the base station, and has certain effects on the radiation protection, heat dissipation, waterproof, moisture proof and insect prevention of the base station.
尽管为示例目的，已经公开了本实用新型的一种实施例，本领域的技术人员将意识到各种改进、增加和取代也是可能的。 Although an embodiment of the present invention has been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible.
工业实用性Industrial applicability
本实用新型实施例的射频屏蔽盒体，可以有效的减小功放模块的体积，为RRU的小型化提供有利保证；也可以大大减少由于腔体效应导致的功放设计评估的难度，为快速评估功放方案提供有力的支持，缩短产品研发周期；还可以灵活地调整功放和其他射频模块的布局，有力地推进一体化大板设计。 The radio frequency shielding box body of the embodiment of the present invention can effectively reduce the volume of the power amplifier module, and provide favorable guarantee for miniaturization of the RRU; and can also greatly reduce the difficulty of designing the power amplifier design due to the cavity effect, and quickly evaluate the power amplifier. The solution provides strong support to shorten the product development cycle; it also flexibly adjusts the layout of power amplifiers and other RF modules to effectively promote integrated slab design.

Claims (10)

  1. 一种射频屏蔽盒体，包括：A radio frequency shielding box body comprising:
    盒体本体，安装在印制电路板PCB板上，与所述PCB板一起构成一个封闭空间，所述PCB板上的元器件位于所述封板空间内；以及a box body mounted on the printed circuit board PCB board, together with the PCB board, forming an enclosed space, wherein components on the PCB board are located in the board space;
    介质板，安装在所述盒体本体内，位于所述PCB板上的元器件上方。A dielectric plate is mounted in the body of the case, above the components on the PCB.
  2. 如权利要求1所述的射频屏蔽盒体，其中，所述盒体本体上设置有多个空腔，每个空腔都对应所述PCB板上的一个功能模块。The radio frequency shielding box body according to claim 1, wherein the casing body is provided with a plurality of cavities, and each cavity corresponds to a functional module on the PCB board.
  3. 如权利要求2所述的射频屏蔽盒体，其中，所述介质板安装在一个或多个空腔内。The radio frequency shielding can according to claim 2, wherein said dielectric plate is mounted in one or more cavities.
  4. 如权利要求3所述的射频屏蔽盒体，其中，当所述介质板安装在多个空腔内时，每个空腔内的介质板的材料相同或不同。The radio frequency shielding can body according to claim 3, wherein the material of the dielectric plates in each of the cavities is the same or different when the dielectric plates are mounted in the plurality of cavities.
  5. 如权利要求3所述的射频屏蔽盒体，其中，所述介质板安装在射频模块对应的空腔内。The radio frequency shielding case according to claim 3, wherein the dielectric plate is mounted in a corresponding cavity of the radio frequency module.
  6. 如权利要求3所述的射频屏蔽盒体，其中，所述介质板安装在功率放大器模块对应的空腔内。The radio frequency shielding can according to claim 3, wherein said dielectric plate is mounted in a cavity corresponding to the power amplifier module.
  7. 如权利要求1～6任一项所述的射频屏蔽盒体，其中，所述盒体本体为金属屏蔽盒体。The radio frequency shielding box body according to any one of claims 1 to 6, wherein the box body is a metal shielding box body.
  8. 如权利要求7所述的射频屏蔽盒体，其中，所述金属屏蔽盒体的材料为铝。The radio frequency shielding case according to claim 7, wherein the metal shielding case is made of aluminum.
  9. 如权利要求1所述的射频屏蔽盒体，其中，所述介质板由非金属材料制成。The radio frequency shielding case according to claim 1, wherein the dielectric plate is made of a non-metal material.
  10. 如权利要求1、8或9所述的射频屏蔽盒体，其中，所述介质板的介电常数大于1。 The radio frequency shielding case according to claim 1, 8 or 9, wherein the dielectric plate has a dielectric constant greater than one.
PCT/CN2015/091316 2014-12-11 2015-09-30 Radio frequency shielding box WO2016090999A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201420779302.9U CN204652865U (en) 2014-12-11 2014-12-11 A kind of radio shielding box body
CN201420779302.9 2014-12-11

Publications (1)

Publication Number Publication Date
WO2016090999A1 true WO2016090999A1 (en) 2016-06-16

Family

ID=54105568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/091316 WO2016090999A1 (en) 2014-12-11 2015-09-30 Radio frequency shielding box

Country Status (2)

Country Link
CN (1) CN204652865U (en)
WO (1) WO2016090999A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204652865U (en) * 2014-12-11 2015-09-16 中兴通讯股份有限公司 A kind of radio shielding box body
CN107645900A (en) * 2017-09-26 2018-01-30 天津光电通信技术有限公司 A kind of shielding box based on radio frequency connector
CN108112228A (en) * 2017-12-12 2018-06-01 北京自动化控制设备研究所 A kind of structure for improving radio circuit capability of electromagnetic shielding

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1252923A (en) * 1997-04-16 2000-05-10 艾利森电话股份有限公司 A shielding housing and method of producing a shielding housing
CN1262562A (en) * 1999-01-08 2000-08-09 萨甘股份有限公司 High-frequency circuit assembly with electromagnetic shielding
WO2001099483A1 (en) * 2000-06-20 2001-12-27 Laird Technologies, Inc. Shielding cover with integral resilient ribs
CN202713890U (en) * 2012-07-05 2013-01-30 深圳市飞荣达科技股份有限公司 Shielding cover
CN103563493A (en) * 2011-06-09 2014-02-05 苹果公司 Electromagnetic shielding structures for shielding components on a substrate
CN203675498U (en) * 2013-10-25 2014-06-25 幸康电子股份有限公司 Power supply module
CN204652865U (en) * 2014-12-11 2015-09-16 中兴通讯股份有限公司 A kind of radio shielding box body

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1252923A (en) * 1997-04-16 2000-05-10 艾利森电话股份有限公司 A shielding housing and method of producing a shielding housing
CN1262562A (en) * 1999-01-08 2000-08-09 萨甘股份有限公司 High-frequency circuit assembly with electromagnetic shielding
WO2001099483A1 (en) * 2000-06-20 2001-12-27 Laird Technologies, Inc. Shielding cover with integral resilient ribs
CN103563493A (en) * 2011-06-09 2014-02-05 苹果公司 Electromagnetic shielding structures for shielding components on a substrate
CN202713890U (en) * 2012-07-05 2013-01-30 深圳市飞荣达科技股份有限公司 Shielding cover
CN203675498U (en) * 2013-10-25 2014-06-25 幸康电子股份有限公司 Power supply module
CN204652865U (en) * 2014-12-11 2015-09-16 中兴通讯股份有限公司 A kind of radio shielding box body

Also Published As

Publication number Publication date
CN204652865U (en) 2015-09-16

Similar Documents

Publication Publication Date Title
WO2016090999A1 (en) Radio frequency shielding box
MX2011008202A (en) Electromagnetic shielding and an acoustic chamber for a microphone in a mobile electronic device.
JP6574024B1 (en) Electronics
CN103715493A (en) Composite module and electronic apparatus including the same
CN201590990U (en) Electromagnetic shielding cover and electronic device
JP6173512B1 (en) Electronics
CN205266129U (en) PCB electromagnetic shield box
CN210838998U (en) Wireless charger and electronic equipment
CN205510596U (en) Electronic equipment and face -piece thereof
CN202160378U (en) Shield cover and shield cover component
WO2016086759A1 (en) Loudspeaker module
CN102591414A (en) Desktop computer
CN102685635B (en) Speaker module and portable electronic device with same
US20130279132A1 (en) Electromagnetic shielding cover
US20130284510A1 (en) Electromagnetic shielding cover and device having the same
TWM578885U (en) Mobile device
CN207150945U (en) Heat abstractor
CN105101763A (en) Shielding cover
CN204408624U (en) Mems microphone device
CN206379945U (en) wireless communication electronic device
CN207911006U (en) Product casing and MEMS microphone
CN210298330U (en) Direction-finding positioning case
CN108738287A (en) Signal shielding method, signal shielding device of automobile and electronic device
CN207218790U (en) Circuit board assemblies and mobile terminal
CN207318693U (en) Circulator cabinet and circulator components

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: 15867895

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: 15867895

Country of ref document: EP

Kind code of ref document: A1