WO2011120236A1 - 一种功率放大器固定装置及通讯设备 - Google Patents
一种功率放大器固定装置及通讯设备 Download PDFInfo
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- WO2011120236A1 WO2011120236A1 PCT/CN2010/071544 CN2010071544W WO2011120236A1 WO 2011120236 A1 WO2011120236 A1 WO 2011120236A1 CN 2010071544 W CN2010071544 W CN 2010071544W WO 2011120236 A1 WO2011120236 A1 WO 2011120236A1
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- power amplifier
- pcb board
- shaped piece
- fixing
- hole
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- 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
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
Definitions
- the present invention relates to the field of communication devices, and more particularly to a mounting device and a communication device for a high power RF power amplifier of a mobile communication device.
- an antenna for transmitting and receiving radio waves to transmit radio signals is undoubtedly one of the most important components.
- the antenna should not only be thin and light, but also preferably operate in dual frequency and have a wider frequency band.
- the RF power amplifier is the heart of the communication equipment.
- the grounding impedance and heat dissipation of the RF power amplifier determine the reliability and cost of the entire amplifier.
- the RF power amplifier uses a dedicated power amplifier module, which ensures the grounding effect and heat dissipation performance, but the cost is high, and each dedicated power amplifier module requires a specific mounting mechanism to match, which brings the overall structural design of the device. Great limit. It is of great economic importance to use a low-cost general-purpose RF power amplifier tube to design a highly reliable amplifier.
- off-the-shelf power amplifier modules are mostly designed and manufactured by power amplifier manufacturers.
- the power amplifier 11 is directly soldered to a heat dissipating copper sheet 12.
- the heat dissipating copper sheet 12 is connected to the ground inside the power amplifier 11.
- the heat-dissipating copper sheet 12 is in direct contact with the grounding copper foil of the PCB board (not shown), and has a low grounding resistance.
- a heat-insulating soft pad is added between the heat-dissipating copper sheet 12 and the heat-dissipating base to improve the power amplifier. Thermal performance.
- the power amplifier module is dedicated, the device procurement cost is high, and the structural design is limited by the shape of the power amplifier module, which is not flexible.
- the second common practice is to add a conductive and thermally conductive soft pad between the power amplifier 23 and the heat sink base 24 to improve the contact between the power amplifier 23 and the heat sink base 24, such as indium foil, Graphite film, conductive silica gel, and the like.
- the gasket used in this way is a compromise between heat conduction and electrical conduction, not having excellent thermal and electrical conductivity at the same time; or it is itself a highly toxic substance such as indium foil.
- the connection path between the power amplifier 23 and the PCB board 21 is grounded: the power amplifier 23 first transfers current to the heat sink base 24, and then the current is transmitted from the heat sink base 24 to the ground of the PCB board 21, thereby increasing the grounding link and grounding. The impedance is also increased. Between the power amplifier 23 and the heat sink base 24, a good electrical performance connection must be ensured between the heat sink base 24 and the PCB board 21 to ensure sufficient RF power output.
- a device for adding a power amplifier 23 is required, and the device for mounting the power amplifier is pressed by the screw 22, and the power amplifier 23 is fixed to the heat sink base 24, and the power of the upper screw 22 is applied.
- the stress directly in the amplifier 23 is subjected to deformation.
- the screw 22 is required to be tight.
- the power amplifier 23 is subjected to excessive deformation stress and is at risk of damage.
- the technical problem to be solved by the present invention is to provide a low-cost power amplifier tube mounting device for the above-mentioned defects of the prior art, which ensures that the power amplifier tube has excellent grounding and heat dissipation, and has high functional consistency. It is also convenient for production assembly.
- a power amplifier fixing device for fixing a power amplifier on a PCB, wherein a U-shaped piece made of an electrically and thermally conductive material is provided, and a concave surface of the U-shaped piece is provided with a fixing surface for fixing the power amplifier a fixed position of the ground plane;
- the two ends of the U-shaped piece are respectively bent and extended outward to form two extending faces for electrically connecting with the grounding signal on the PCB board and for fixedly connecting the PCB board.
- the power amplifier fixing device of the present invention wherein a concave surface of the U-shaped piece is flush with a ground plane of the power amplifier, and two extending faces of the U-shaped piece and an input/output signal pin of the power amplifier Flush.
- the power amplifier fixing device of the present invention wherein the fixed bit is a square groove of a size corresponding to a total area of a ground plane of one or more of the installed power amplifiers, and the power amplifier is soldered at The fixed position.
- the power amplifier fixing device of the present invention wherein two fixing surfaces are respectively provided with fixing holes, and the fixing holes are provided with fastening for connecting the U-shaped piece to the PCB board Pieces.
- the conductive heat conductive material for preparing the U-shaped sheet is copper or a copper alloy.
- the present invention also provides a communication device, comprising a PCB board for performing a communication function, wherein the PCB board is provided with a power amplifier, wherein the power amplifier is fixed on the PCB board by a power amplifier fixing device;
- the power amplifier fixing device comprises a U-shaped piece made of an electrically and thermally conductive material, and a concave surface of the U-shaped piece is provided with a fixing position for fixing the power amplifier;
- the two ends of the U-shaped piece are respectively bent and extended outward to form two extending faces for electrically connecting with the grounding signal on the PCB board and for fixedly connecting the PCB board.
- the communication device of the present invention wherein the PCB board is provided with a through hole, the edge portion of the through hole is exposed to the ground copper, and the bottom surface of the U-shaped piece passes through the through hole, the U-shaped piece Two extending faces are caught at an edge of the through hole, and are in contact with a portion of the through hole having a grounded copper;
- Fixing holes are respectively disposed on the two extending surfaces, and the fixing holes are provided with fasteners for connecting the U-shaped piece to the PCB board;
- a hole corresponding to the fixing hole on the two extending surfaces is opened in a region of the through hole at which the grounding copper is exposed, and the fastener passes through the corresponding fixing hole and the hole to fix the U-shaped piece in the On the PCB board.
- the bottom surface of the U-shaped piece is flush with the ground plane of the power amplifier, and the two extended faces of the U-shaped piece are flush with the input and output signal pins of the power amplifier.
- the area of the PCB board mated with the input and output signal pins of the power amplifier is exposed to copper, so that the input and output signal pins of the power amplifier are electrically connected to the input and output signal terminals on the PCB.
- the communication device of the present invention wherein the electrically and thermally conductive material used to prepare the U-shaped sheet is copper or a copper alloy.
- the communication device of the present invention wherein the communication device further comprises a heat dissipation base, and the heat dissipation base is provided with a convex surface or a groove surface for placing the bottom surface of the U-shaped piece;
- a thermal pad or thermal grease is disposed between the outer bottom surface of the U-shaped piece and the heat dissipation base.
- the power amplifier fixing device of the invention fixes the power amplifier, the power amplifier itself is not subjected to deformation stress, the installation is safe and worry-free, and the U-shaped piece is soldered to the ground of the power amplifier, and the two ends of the U-shaped piece are directly connected to the ground of the PCB board.
- the heat of the power amplifier is mainly radiated from the bottom of the U-shaped piece to the heat dissipation base, and has excellent grounding and heat dissipation effects; and can be used for one power amplifier alone or
- the combination of power amplifiers ensures uniformity of multiple power amplifiers in parallel and is easy to assemble.
- FIG. 1 is a schematic diagram 1 of a prior art power amplifier fixing method
- FIG. 2 is a schematic diagram 2 of a prior art power amplifier fixing method
- FIG. 3 is a schematic structural view of a power amplifier fixing device of the present invention.
- FIG. 4 is a schematic structural view of a power amplifier required to be fixed according to the present invention.
- FIG. 5 is a schematic structural view of a power amplifier of the present invention fixed on a power amplifier fixing device
- FIG. 6 is a schematic structural view of a PCB board of a communication device of the present invention.
- Figure 7 is a cross-sectional view showing the structure of a power amplifier fixed to a PCB board using the power amplifier fixing device of the present invention
- Figure 8 is a cross-sectional view showing a partial structure of a communication device using the power amplifier fixing device of the present invention.
- Figure 9 is a schematic view showing the assembly structure of a communication device using the power amplifier fixing device of the present invention.
- the power amplifier fixing device of the preferred embodiment of the present invention is used for fixing the power amplifier 40 on the PCB board 50.
- the structure of the power amplifier 40 is as shown in FIG. 3, and referring to FIGS. 4, 5 and 6, the power amplifier fixing device includes A U-shaped sheet 30 made of an electrically and thermally conductive material is provided on the concave surface 31 of the U-shaped sheet 30 with a fixed position 311 for fixing the power amplifier 40, wherein the ground plane 41 of the power amplifier 40 (which is also the heat dissipating surface of the power amplifier 40) The fixed position 311 is in contact.
- the two ends of the U-shaped piece 30 i.e., the vertical two side edges
- the U-shaped piece 30 itself is made of an electrically and thermally conductive material, the extending faces 32 at both ends of the U-shaped piece 30 are in electrical contact with the grounding signal on the PCB board 50, respectively, and complete the fixed connection with the PCB board 50, the power amplifier 40 is
- the fixing surface 311 is fixed on the bottom surface of the U-shaped piece 30, and the grounding surface 41 is in contact with the inner bottom surface of the U-shaped piece 30.
- the heat can be dissipated through the U-shaped piece 30 and the ground between the power amplifier 40 and the PCB board 50 can be realized. connection. Since the power amplifier 40 itself does not need to withstand deformation stress, damage to the power amplifier 40 can be reduced and its service life can be extended.
- the concave surface 31 of the U-shaped piece 30 is flush with the ground plane of the power amplifier 40, and the extended surface 32 of the U-shaped piece 30 is flush with the input and output signal pins 42 of the power amplifier 40. That is, the depth of the concave portion of the U-shaped sheet 30 should be adapted to the thickness of the power amplifier 40 so that the power amplifier 40 can be placed in the U-shaped sheet 30, and the input and output signal pins of the power amplifier 40 can be exactly matched with the PCB board 50. The corresponding pins are electrically connected, and the power amplifier 40 does not sway within the U-shaped piece 30, so that the electrical connection between the power amplifier 40 and the PCB board is more secure.
- the fixed position 311 is provided as a slot having a size corresponding to the total area of the ground plane 41 of the one or more power amplifiers 40 mounted, and the power amplifier 40 can be soldered by a surface mount soldering process.
- the square slot a fixed connection and an electrical connection between the power amplifier 40 and the U-shaped piece 30 are achieved.
- fixing holes 321 are respectively disposed on the two extending surfaces 32 , and fasteners 70 for connecting the U-shaped piece 30 to the PCB board 50 may be disposed in the fixing holes 321 .
- the fastener 70 can be a fixing member such as a screw, and the U-shaped piece 30 is directly fixed on the PCB board 50, so that the power amplifier 40 itself does not need to withstand deformation stress, and the damage to the power amplifier 40 can be reduced, and the service life thereof can be prolonged.
- the conductive heat conductive material used for preparing the U-shaped sheet 30 is preferably made of copper or a copper alloy, which has good electrical and thermal conductivity and is inexpensive, and is convenient for molding.
- the present invention also provides a communication device, as shown in FIGS. 8 and 9, while referring to FIGS. 5, 6, and 7, including a PCB board for performing a communication function. 50.
- the PCB 50 is provided with a power amplifier 40 in addition to an element which is indispensable for completing the communication function.
- the power amplifier 40 is fixed on the PCB board 50 by a power amplifier fixing device.
- the power amplifier fixture includes at least a U-shaped piece 30 made of an electrically and thermally conductive material, and a fixed position 311 for fixing the power amplifier 40 is disposed on the concave surface 31 of the U-shaped piece 30. Both ends of the U-shaped piece 30 are bent outwardly and extended, respectively, to form two extended faces 32 for electrically connecting to the ground signal on the PCB board 50 and for fixing the connection PCB board 50.
- fixing holes 321 are provided, respectively, and the fixing holes 321 are provided with fasteners 70 for connecting the U-shaped piece 30 to the PCB board 50, wherein the fasteners 70 may employ screws or the like.
- a through hole 51 is provided in the PCB board 50.
- the size of the through hole 51 is determined by the size of the bottom surface of the U-shaped piece 30, and the through hole 51 can only make the bottom surface of the U-shaped piece 30.
- the two extension faces 32 of the U-shaped piece 30 and the signal input/output pin 42 of the power amplifier 40 cannot pass.
- the edge portion of the through hole 51 is exposed to copper, and the portion of the copper is grounded, and its area is slightly larger than the area of the extended surface 32 of the U-shaped piece 30.
- the bottom surface of the U-shaped piece 30 passes through the through hole 51, and the two extending faces 32 are caught at the edge of the through hole 51, and are in contact with the portion of the through hole 51 where the copper is grounded.
- a hole 52 corresponding to the fixing hole 321 of the two extending faces 32 is opened in a region where the grounding copper is exposed at the edge of the through hole 51.
- the fastener 70 passes through the corresponding fixing hole 321 and the hole 52 to fix the U-shaped piece 30 to the PCB.
- On board 50 On board 50.
- the exposed area of the PCB board 50 and the signal input/output pin 42 of the power amplifier 40 is exposed to copper.
- the exposed copper is connected to the associated circuit and is the input and output end of the signal, and its size is slightly larger than the signal input of the power amplifier 40. Output pin 42.
- the bottom surface of the U-shaped sheet 30 is flush with the ground plane 41 of the power amplifier 40, and the extended surface 32 at both ends of the U-shaped sheet 30 is flush with the input and output signal pins 42 of the power amplifier 40, and the power is made.
- the input and output signal pins 42 of the amplifier 40 are in contact with the associated exposed copper regions on the PCB 50 to effect electrical connection of the input and output signal pins 42 of the power amplifier 40 to the PCB board 50.
- the communication device of the embodiment further includes a heat dissipation base 60 located under the PCB board 50.
- the outer bottom surface of the U-shaped piece 30 is in contact with the heat dissipation base 60 to achieve better heat dissipation of the power amplifier 40.
- the heat dissipation base 60 is provided with a boss surface 61 or a groove surface 61 corresponding to the size of the bottom area of the U-shaped piece 30, and a screw hole through which the fastener 70 can be disposed is disposed on the heat dissipation base 60 (not shown).
- the fastener 70 can fix the PCB board 50 and the U-shaped piece 30 together with the heat dissipation base 60.
- a thermal pad or thermal grease (not shown) is disposed between the outer bottom surface of the U-shaped sheet 30 and the heat dissipation base 60 to achieve better heat dissipation of the power amplifier 40.
- the conductive and heat conductive material used for preparing the U-shaped sheet 30 is copper or a copper alloy, and has good electrical and thermal conductivity, and the material is cheap and convenient for molding.
- the power amplifier 40 is first soldered to the fixed position 311 of the U-shaped piece 30, and the U-shaped piece 30 of the power amplifier 40 is soldered as a power.
- the amplifier module is used.
- the power amplifier module is placed in the through hole 51 of the PCB board 50, so that the two extended faces 32 of the U-shaped piece 30 are in contact with the ground copper on the PCB board 50, and the input and output signal pins 42 of the power amplifier 40 are turned on. The signal is communicated with the PCB board 50.
- the bottom surface of the U-shaped piece 30 is attached to the convex surface or the concave surface 61 of the heat dissipation base 60, and a thermal pad or thermal grease can be applied between the bottom surface of the U-shaped piece 30 and the heat dissipation base 60.
- the fastener 70 fixes the U-shaped piece 30 to the PCB board 50 and the heat dissipation base 60, and finally solders the signal input/output pin 42 of the power amplifier 40 to the corresponding exposed copper area on the PCB board 50.
- the power amplifier fixing device of the present invention can be used for one power amplifier alone, or can be used for multiple power amplifier combinations, and can ensure uniformity when multiple power amplifiers are connected in parallel, and is convenient to assemble.
- the scheme is to fasten the U-shaped piece, the power amplifier is not directly subjected to the force, and the problem that the power amplifier is easily broken is solved, and the installation is safe and worry-free.
- the pin of the power amplifier needs to be soldered to the PCB board only during the first installation process, and the PCB is not required to be soldered after the PCB is removed or installed from the heat dissipation base.
- Production assembly and maintenance cleverly solved the problem of heat dissipation and grounding of the power amplifier.
- the U-shaped piece is first fastened with screws, and the pins of the power amplifier are welded, thereby eliminating the system tolerance caused by the tolerance of each part in the assembly, and ensuring the consistency of mass production.
- the power amplifier fixing device of the present invention ensures that the bottom plane of the U-shaped piece is in close contact with the convex surface or the groove surface of the heat dissipation base, and the heat of the power amplifier is mainly radiated from the bottom of the U-shaped piece to the heat dissipation base, and the U-shaped piece
- a thermal pad or thermal grease can be added between the bottom and the thermal base. The conductivity of the thermal pad or thermal grease has no effect on the grounding effect of the power amplifier.
- the two extended faces of the U-shaped piece are closely attached to the grounded exposed copper area on the PCB board, and the two ends of the U-shaped piece are directly in contact with the ground of the PCB, thereby reducing the grounding link of the power amplifier, effectively The grounding impedance is reduced to ensure the reliability of the grounding.
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Description
本发明涉及通讯设备领域,更具体的说,涉及移动通讯设备高功率射频功率放大器的安装装置及通讯设备。
在当今的信息化社会,人们通常都希望能随时随地方便的接收到有用的信息,所以,各种便携式无线通讯装置广泛的应用于人们的日常生活中。在无线通讯装置中,用来发射接收无线电波以传递无线电信号的天线,无疑是十分重要的元件之一。对于大量的手持终端设备,天线不仅要轻薄短小,最好还要能操作于双频,频带也要更宽。
射频功率放大器是通信设备的心脏,射频功率放大器的接地阻抗和散热效果决定了整个放大器工作的可靠性和成本。射频功率放大器选用专用的功率放大模块,接地效果和散热性能都有保障,但是成本较高,而且每一种专用功率放大器模块都需要特定的安装机构来配合,给设备的整体结构设计带来较大限制。使用成本较低的通用射频功率放大管来配合设计高可靠放大器,有重要的经济意义。
通常现成功率放大器模块大都是功率放大器厂商设计并制造的,是直接把功率放大器11焊接在一块散热铜片12上,如图1所示,散热铜片12与功率放大器11内部的地连接。在安装时,散热铜片12与PCB板(未图示)的接地铜箔直接接触,有较低的接地阻抗,散热铜片12与散热底座之间加导热的软衬垫以提高功率放大器的散热性能。这种方式功率放大器模块专用,器件采购成本高,结构设计受到功率放大器模块形状限制,不灵活。
如图2所示,第二种常见做法是在功率放大器23和散热底座24之间加即导电又导热的软衬垫,来提高功率放大器23和散热底座24之间的接触,比如铟箔、石墨膜、导电硅胶等。
这种方式采用的衬垫都是导热和导电的折中,不是同时具备优良的导热和导电性能;或者本身就是一种毒性较高的物质,如铟箔。本方案中功率放大器23与PCB板21接地的连接路径是:功率放大器23先把电流传到散热底座24,然后再由散热底座24把电流传给PCB板21的地,增加了接地环节,接地阻抗也增加了。功率放大器23与散热底座24之间,散热底座24与PCB板21之间都必须保证有良好的电性能连接,才能保证有足够的射频功率输出。
而且第二种方式中须要增加一个压功率放大器23的装置(未图示),通过螺钉22把装压功率放大器的装置压住,将功率放大器23固定到散热底座24上,上螺钉22时功率放大器23内直接承受变形的应力,为了有好的导电和散热性能,要求螺钉22上的很紧,在上螺钉22时,功率放大器23承受变形应力过大,有受损的风险。
本发明要解决的技术问题在于,针对现有技术的上述缺陷,提供一种低成本的功率放大管的安装装置,这种装置保证功率放大管接地和散热都很优良,功能一致性高,同时还便于生产装配。
本发明解决其技术问题所采用的技术方案是:
构造一种功率放大器固定装置,用于将功率放大器固定在PCB板上,其中,包括由导电导热材料制成的U形片,所述U形片的凹面上设置有用于固定所述功率放大器的接地面的固定位;
所述U形片的两端分别向外弯折并延伸,形成两个用于与PCB板上接地信号电连接、及用于固定连接所述PCB板的延伸面。
本发明所述的功率放大器固定装置,其中,所述U形片的凹面与所述功率放大器的接地面平齐,所述U形片的两延伸面与所述功率放大器的输入输出信号引脚平齐。
本发明所述的功率放大器固定装置,其中,所述固定位为一大小与所安装的一个或多个所述功率放大器的接地面总面积大小相适配的方槽,所述功率放大器焊接在所述固定位上。
本发明所述的功率放大器固定装置,其中,在两个所述延伸面上,分别设置有固定孔,所述固定孔内设置有用于将所述U形片连接至所述PCB板的紧固件。
本发明所述的功率放大器固定装置,其中,用于制备所述U形片的导电导热材料为铜或铜合金。
本发明还提供了一种通讯设备,包括完成通信功能的PCB板,所述PCB板上设置有功率放大器,其中,所述功率放大器通过一功率放大器固定装置固定在所述PCB板上;
其中,所述功率放大器固定装置包括由导电导热材料制成的U形片,所述U形片的凹面上设置有用于固定所述功率放大器的固定位;
所述U形片的两端分别向外弯折并延伸,形成两个用于与PCB板上接地信号电连接、及用于固定连接所述PCB板的延伸面。
本发明所述的通讯设备,其中,所述PCB板上设置有通孔,所述通孔边缘部分露出接地铜,所述U形片的底面穿过所述通孔,所述U形片的两延伸面卡在所述通孔边缘,与所述通孔边缘接地铜的部分相接触;
在两个所述延伸面上,分别设置有固定孔,所述固定孔内设置有用于将所述U形片连接至所述PCB板的紧固件;
在所述通孔边缘露接地铜的区域开设有与所述两延伸面上的固定孔相对应的孔,所述紧固件穿过相应固定孔和孔,将所述U形片固定在所述PCB板上。
本发明所述的通讯设备,其中,所述U形片的底面与所述功率放大器的接地面平齐,所述U形片的两延伸面与所述功率放大器的输入输出信号引脚平齐;
在所述PCB板与功率放大器的输入输出信号引脚相配合的区域露铜,使所述功率放大器的输入输出信号引脚电连接至所述PCB板上的输入输出信号端。
本发明所述的通讯设备,其中,用于制备所述U形片的导电导热材料为铜或铜合金。
本发明所述的通讯设备,其中,所述通讯设备还包括散热底座,所述散热底座上设置有用于放置所述U形片底面的凸台面或凹槽面;
所述U形片的外底面与所述散热底座之间设置有导热垫或导热硅脂。
采用本发明的功率放大器固定装置固定功率放大器,功率放大器本身不承受变形应力,安装安全省心,且U形片与功率放大器的地焊在一起,U形片的两端直接与PCB板的地接触,接地阻抗低,保证了电性能的一致性;功率放大器的热量主要由U形片的底部向散热底座散发,同时具备优良的接地和散热效果;且可用于一个功率放大器单用,也可用功率放大器组合,并能确保多个功率放大器并联时的一致性,装配方便。
下面将结合附图及实施例对本发明作进一步说明,附图中:
图1是现有技术的功率放大器固定方式示意图一;
图2是现有技术的功率放大器固定方式示意图二;
图3是本发明的功率放大器固定装置结构示意图;
图4是本发明的所需固定的功率放大器结构示意图;
图5是本发明的功率放大器固定在功率放大器固定装置上结构示意图;
图6是本发明的通讯设备的PCB板结构示意图;
图7是采用本发明的功率放大器固定装置将功率放大器固定在PCB板上的结构剖视图;
图8是采用本发明的功率放大器固定装置的通讯设备局部结构剖视图;
图9是采用本发明的功率放大器固定装置的通讯设备装配结构示意图。
下面结合图示,对本发明的优选实施例作详细介绍。
本发明较佳实施例的功率放大器固定装置用于将功率放大器40固定在PCB板50上,其结构示意图如图3所示,同时参阅图4、5和6,所述功率放大器固定装置包括由导电导热材料制成的U形片30,在U形片30的凹面31上设置有用于固定功率放大器40的固定位311,其中功率放大器40的接地面41(也是功率放大器40的散热面)与该固定位311相接触。U形片30的两端(即竖直的两侧边)分别向外弯折并延伸,形成两个用于与PCB板50上接地信号电连接、并用于固定连接PCB板50的延伸面32。
由于U形片30本身是采用导电导热材料制成的,U形片30两端的延伸面32分别与PCB板50上的接地信号电接触,并完成与PCB板50的固定连接,功率放大器40是固定在U形片30内底面的固定位311上,其接地面41与U形片30的内底面相接触,连可通过U形片30散热及实现功率放大器40与PCB板50之间的接地连接。由于功率放大器40本身不需要承受变形应力,可减少对功率放大器40的损坏,延长其使用寿命。
优选地,如图5所示,U形片30凹面31与功率放大器40的接地面平齐,U形片30两端的延伸面32与功率放大器40的输入输出信号引脚42平齐。即U形片30凹部的深度应与功率放大器40的厚度相适配,使功率放大器40能正好放在该U形片30中,且功率放大器40的输入输出信号引脚正好能与PCB板50上的相应引脚电连接,功率放大器40在U形片30内不会晃动,使功率放大器40与PCB板之间的电连接更加牢固。
优选地,如图3所示,固定位311设置为一方槽,其大小与所安装的一个或多个功率放大器40的接地面41总面积大小相当,功率放大器40可采用表面贴装焊接工艺焊接在该方槽内,实现功率放大器40与U形片30之间的固定连接及电连接。
优选地,如图3和图7所示,在两延伸面32上,分别设置有固定孔321,固定孔321内可设置用于将U形片30连接至PCB板50的紧固件70,紧固件70可以为螺钉等固定件,直接将U形片30固定在PCB板50上,使的功率放大器40本身不需要承受变形应力,可减少对功率放大器40的损坏,延长其使用寿命。
本实施例中,用于制备U形片30的导电导热材料优选采用铜或铜合金,其导电导热性能良好,且材料便宜,便于成型。
根据以上实施例中的功率放大器固定装置,本发明还提供了一种通讯设备,如图8和图9所示,同时参阅图5、6和图7,其包括用于完成通信功能的PCB板50,PCB板50上除设置有完成通信功能必不可少的元件外,还设置有功率放大器40。
其中,功率放大器40通过一功率放大器固定装置固定在PCB板50上。该功率放大器固定装置至少包括由导电导热材料制成的U形片30,在U形片30的凹面31上设置有用于固定功率放大器40的固定位311。U形片30的两端分别向外弯折并延伸,形成两个用于与PCB板50上接地信号电连接、并用于固定连接PCB板50的延伸面32。在两延伸面32上,优选地分别设置有固定孔321,固定孔321内设置有用于将U形片30连接至PCB板50的紧固件70,其中紧固件70可采用螺钉等。
相应地,如图6和7所示,在PCB板50上设置有通孔51,该通孔51的大小由U形片30的底面大小决定,通孔51只能让U形片30的底面顺利通过,U形片30的两延伸面32和功率放大器40的信号输入输出引脚42不能通过。通孔51边缘部分露铜,该部分铜是接地的,它的面积大小略大于U形片30的延伸面32面积。U形片30的底面穿过通孔51,两延伸面32卡在通孔51边缘,与通孔51边缘接地铜的部分相接触。在通孔51边缘露接地铜的区域开设有与两延伸面32上的固定孔321相对应的孔52,紧固件70穿过相应固定孔321和孔52,将U形片30固定在PCB板50上。
在PCB板50与功率放大器40的信号输入输出引脚42相配合的区域露铜,此露铜是和相关的电路相连,是信号的输入输出端,它的大小略大于功率放大器40的信号输入输出引脚42。
如图7所示,将U形片30的底面与功率放大器40的接地面41平齐,U形片30两端的延伸面32与功率放大器40的输入输出信号引脚42平齐,并使功率放大器40的输入输出信号引脚42与PCB板50上的相关露铜区域相接触,实现功率放大器40的输入输出信号引脚42与PCB板50的电连接。
优选地,如图7所示,本实施例的通讯设备还包括位于PCB板50下方的散热底座60,U形片30的外底面与散热底座60相接触,以实现功率放大器40更好的散热。在散热底座60上设置有与U形片30的底部面积大小相适应的凸台面61或者是凹槽面61,再在该散热底座60上设置可穿过紧固件70的螺钉孔(未图示),使得紧固件70可将PCB板50、U形片30与该散热底座60一起固定。
更优选地,在U形片30的外底面与散热底座60之间设置有导热垫或导热硅脂(未图示),以实现功率放大器40更好的散热。
其中,用于制备U形片30的导电导热材料为铜或铜合金,其导电导热性能良好,且材料便宜,便于成型。
使用时,如图7、8和9所示,同时参阅图3,先将功率放大器40焊接固定在U形片30的固定位311上,焊接好功率放大器40的U形片30可作为一个功率放大器模块使用。再将该功率放大器模块放置在PCB板50的通孔51内,使U形片30的两延伸面32与PCB板50上的接地铜相接触,并使功率放大器40的输入输出信号引脚42与PCB板50连接实现信号通信。并使U形片30的底面与散热底座60上的凸台面或者是凹槽面61相贴合,还可以在U形片30底面与散热底座60之间加涂导热垫或导热硅脂,采用紧固件70将U形片30固定在PCB板50及散热底座60上,最后把把功率放大器40的信号输入输出引脚42焊在PCB板50上相应的露铜区域即可。
在安装上,本发明的功率放大器固定装置可以用于一个功率放大器单用,也可用于多个功率放大器组合,并能确保多个功率放大器并联时的一致性,装配方便。同时此方案由于是对U形片进行紧固,没有让功率放大器直接受力,解决了功率放大器易压破的问题,安装安全省心。
且采用本发明的功率放大器固定装置,只在第一次安装过程中需要把功率放大器的引脚焊在PCB板上,以后PCB从散热底座上拆卸或安装不需要再对功率放大器进行焊接,方便了生产装配和维修,巧妙地解决了功率放大器的散热和接地的问题。而且将U形片先用螺钉紧固,再焊功率放大器的引脚,从装配上消除了各零件在制造中的公差引起的系统公差,保证了量产的一致性。
在散热方面,本发明的功率放大器固定装置确保U形片底部平面与散热底座的凸台面或者是凹槽面紧贴,功率放大器的热量主要由U形片的底部向散热底座散发,U形片底部和热底座之间可以加导热垫或导热硅脂,导热垫或导热硅脂的导电性对功率放大器的接地效果没有影响。
在电性能上,U形片的两个延伸面与PCB板上的接地露铜区紧贴焊在一起,U形片的两端直接与PCB的地接触,减少了功率放大器的接地环节,有效降低了接地阻抗,保证了接地的可靠性。
应当理解的是,对本领域普通技术人员来说,可以根据上述说明加以改进或变换,而所有这些改进和变换都应属于本发明所附权利要求的保护范围。
Claims (10)
- 一种功率放大器固定装置,用于将功率放大器(40)固定在PCB板(50)上,其特征在于,包括由导电导热材料制成的U形片(30),所述U形片(30)的凹面(31)上设置有用于固定所述功率放大器(40)的接地面(41)的固定位(311);所述U形片(30)的两端分别向外弯折并延伸,形成两个用于与PCB板(50)上接地信号电连接、及用于固定连接所述PCB板(50)的延伸面(32)。
- 根据权利要求1所述的功率放大器固定装置,其特征在于,所述U形片(30)的凹面(31)与所述功率放大器(40)的接地面(41)平齐,所述U形片(30)的两延伸面(32)与所述功率放大器(40)的输入输出信号引脚(42)平齐。
- 根据权利要求1所述的功率放大器固定装置,其特征在于,所述固定位(311)为一大小与所安装的一个或多个所述功率放大器(40)的接地面(41)总面积大小相适配的方槽,所述功率放大器(40)焊接在所述固定位(311)上。
- 根据权利要求1所述的功率放大器固定装置,其特征在于,在两个所述延伸面(32)上,分别设置有固定孔(321),所述固定孔(321)内设置有用于将所述U形片(30)连接至所述PCB板(50)的紧固件(70)。
- 根据权利要求1所述的功率放大器固定装置,其特征在于,用于制备所述U形片(30)的导电导热材料为铜或铜合金。
- 一种通讯设备,包括完成通信功能的PCB板(50),所述PCB板(50)上设置有功率放大器(40),其特征在于,所述功率放大器(40)通过一功率放大器固定装置固定在所述PCB板(50)上;其中,所述功率放大器固定装置包括由导电导热材料制成的U形片(30),所述U形片(30)的凹面(31)上设置有用于固定所述功率放大器(40)的固定位(311);所述U形片(30)的两端分别向外弯折并延伸,形成两个用于与PCB板(50)上接地信号电连接、及用于固定连接所述PCB板(50)的延伸面(32) 。
- 根据权利要求6所述的通讯设备,其特征在于,所述PCB板(50)上设置有通孔(51),所述通孔(51)边缘部分露出接地铜,所述U形片(30)的底面穿过所述通孔(51),所述U形片(30)的两延伸面(32)卡在所述通孔(51)边缘,与所述通孔(51)边缘接地铜的部分相接触;在两个所述延伸面(32)上,分别设置有固定孔(321),所述固定孔(321)内设置有用于将所述U形片(30)连接至所述PCB板(50)的紧固件(70);在所述通孔(51)边缘露接地铜的区域开设有与所述两延伸面(32)上的固定孔(321)相对应的孔(52),所述紧固件(70)穿过相应固定孔(321)和孔(52),将所述U形片(30)固定在所述PCB板(50)上 。
- 根据权利要求7所述的通讯设备,其特征在于,所述U形片(30)的底面与所述功率放大器(40)的接地面(41)平齐,所述U形片(30)的两延伸面(32)与所述功率放大器(40)的输入输出信号引脚(42)平齐;在所述PCB板(50)与功率放大器(40)的输入输出信号引脚(42)相配合的区域露铜,使所述功率放大器(40)的输入输出信号引脚(42)电连接至所述PCB板(50)上的输入输出信号端。
- 根据权利要求6所述的通讯设备,其特征在于,用于制备所述U形片(30)的导电导热材料为铜或铜合金。
- 根据权利要求6所述的通讯设备,其特征在于,所述通讯设备还包括散热底座(60),所述散热底座(60)上设置有用于放置所述U形片(30)底面的凸台面或凹槽面(61);所述U形片(30)的外底面与所述散热底座(60)之间设置有导热垫或导热硅脂。
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