WO2017157095A1 - 一种射频屏蔽盒、功放和射频屏蔽方法 - Google Patents
一种射频屏蔽盒、功放和射频屏蔽方法 Download PDFInfo
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- WO2017157095A1 WO2017157095A1 PCT/CN2017/071086 CN2017071086W WO2017157095A1 WO 2017157095 A1 WO2017157095 A1 WO 2017157095A1 CN 2017071086 W CN2017071086 W CN 2017071086W WO 2017157095 A1 WO2017157095 A1 WO 2017157095A1
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- power amplifier
- spacer
- radio frequency
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- circuit
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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
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
-
- 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
- H05K9/0007—Casings
- H05K9/0058—Casings specially adapted for optoelectronic applications
Definitions
- the present disclosure relates to the field of electronic devices, for example, to a radio frequency shielding box, a power amplifier, and a radio frequency shielding method.
- the power amplifier module as the main amplifying unit, occupies a dominant position in the overall base station capacity improvement.
- the RF shielding box is one of the important components of the power amplifier. It has the function of preventing the leakage of RF energy to the outside, and ensures that the base station equipment passes the EMC (Electro Magnetic Compatibility) test to ensure the stability of the power amplifier link itself.
- EMC Electro Magnetic Compatibility
- the shielding performance of the RF shielding box and the influence of the cavity formed by the shielding box and the PCB board on the RF circuit are the most important indicators for judging whether the shielding box is good or bad.
- the shielding performance mainly focuses on the electrical tightness of the shielding box itself, and 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. The better the performance is achieved.
- the existing RF shielding box only realizes the isolation of the PCB circuit board from the outside, and ensures that the deterioration of the link to the link is within an acceptable range. At this time, the height of the RF shielding box is high. Claim. Therefore, in the case of ensuring the basic shielding performance of the shielding box and the small influence on the circuit, the miniaturization design of the shielding box is difficult to realize. It is also difficult for the shield box itself to provide an additional beneficial addition to the power amplifier link itself.
- the main technical problem to be solved by the present disclosure is to provide a radio frequency shielding box, a power amplifier and a radio frequency shielding method, and to solve the related art, in the case of realizing miniaturization of the radio frequency shielding box, a power amplifier circuit is generated.
- the negative reflection effect is to provide a radio frequency shielding box, a power amplifier and a radio frequency shielding method, and to solve the related art, in the case of realizing miniaturization of the radio frequency shielding box, a power amplifier circuit is generated.
- the negative reflection effect is to provide a radio frequency shielding box, a power amplifier and a radio frequency shielding method, and to solve the related art, in the case of realizing miniaturization of the radio frequency shielding box, a power amplifier circuit is generated. The negative reflection effect.
- a radio frequency shielding box including:
- the shielding box including a cavity configured to receive the power amplifier circuit module, the first spacer being disposed in the cavity, the cavity Dividing into a first chamber and a second chamber;
- the power amplifier circuit module is placed in the shielding box, and the power amplifier input circuit sub-module and the power amplifier output circuit sub-module of the power amplifier circuit module are respectively located in the first chamber And the second chamber;
- the power amplifier circuit input sub-module includes at least two power amplifier input circuits, the power amplifier output circuit sub-module is provided with a corresponding number of power amplifier output circuits;
- the second spacer and the first The spacers are at an angle to each other and are disposed between each of the power amplifier input circuits and the output circuit.
- the first spacer is provided with a power amplifier tube groove configured to receive the power amplifier tube of the power amplifier circuit module, and the power amplifier circuit module is placed in the shielding box body.
- the power amplifier tube is located in the recess.
- the size of the power amplifier tube groove matches the size of the power amplifier tube on the power amplifier circuit module.
- the first spacer is provided with a circuit recess configured to receive a power amplifier circuit of the power amplifier circuit module, and when the power amplifier circuit module is placed in the shielding box The power amplifier circuit is located in the recess.
- the heights of the first spacer and the second spacer are equal to the height of the cavity.
- the material of the shielding case, the first spacer, and the second spacer is a metal material.
- the shielding box body, the first spacer, and the second spacer are made of aluminum or copper.
- the present disclosure also provides a power amplifier including a power amplifier circuit module and the above-described radio frequency shielding box, wherein the power amplifier circuit module is located in the radio frequency shielding box.
- the power amplifier circuit module includes at least two power amplifier tubes.
- the present disclosure also provides a radio frequency shielding method, including:
- first spacer and a second spacer in a cavity of the shielding box, the first spacer
- the cavity is divided into a first chamber and a second chamber, and the second spacer is disposed at an angle with the first spacer;
- the power amplifier circuit module is disposed in the shielding box, the power amplifier input circuit sub-module of the power amplifier circuit module is located in the first chamber, and the power amplifier output circuit sub-module of the power amplifier circuit module is located in the second chamber.
- the power amplifier circuit input sub-module includes at least two power amplifier input circuits, the power amplifier output circuit sub-module is provided with a corresponding power amplifier output circuit; the second isolation component is located between each power amplifier input circuit and the output circuit .
- the utility model has the beneficial effects of providing a radio frequency shielding box, a power amplifier and a radio frequency shielding method, the shielding box comprising a shielding box body, a first spacer and a second spacer, the shielding box body comprising a cavity configured to be accommodated a power amplifier circuit module; the first spacer is disposed in the cavity, and divides the cavity into a first chamber and a second chamber; when working, the shielding box body and the power amplifier circuit module cooperate with each other, and the power amplifier circuit module is placed In the shielding box body, at this time, the input sub-module and the output sub-module of the power amplifier circuit are respectively located in the first chamber and the second chamber; the power amplifier circuit input sub-module includes at least two power amplifier input circuits, and the power amplifier output circuit sub-module a power amplifier output circuit having a corresponding number of channels; the second spacer and the first spacer are at an angle to each other, and are disposed between each of the power amplifier input circuits and the output circuit, when the layout
- the space between the shielding box and the power amplifier circuit module can be improved by adopting the shielding box layout method described above, thereby improving the resonance frequency and the cutoff frequency of the space, thereby ensuring the stability of the power amplifier link.
- Sexuality increasing the spatial transmission attenuation of the reflected energy, providing a shorter surface current return path in the working state of the power amplifier, reducing its harm to the power amplifier circuit module.
- the amplifier input signal and the amplifier output signal can be isolated. Therefore, the improvement of the shielding box by using the above layout method can achieve the miniaturization of the RF shielding box while achieving better performance and stability of the RF shielding box.
- FIG. 1 is a schematic structural diagram of a radio frequency shielding box according to Embodiment 1 of the present disclosure
- FIG. 2 is a cross-sectional view showing a power amplifier circuit module disposed in a radio frequency shielding box according to Embodiment 1 of the present disclosure
- FIG 3 is another cross-sectional view of the power amplifier circuit module in the radio frequency shielding box according to the first embodiment of the present disclosure.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- the embodiment provides a radio frequency shielding box.
- the radio frequency shielding box can achieve better performance and stability of the radio frequency shielding box, and realize miniaturization of the radio frequency shielding box.
- the structure will be described below.
- the radio frequency shielding box includes a shielding box body 11, a first spacer 12 and a second spacer 13, the shielding box includes a cavity, and the cavity is enclosed by the shielding box body 11 for The power amplifier circuit module is accommodated.
- the first spacer 12 is disposed within the cavity to divide the cavity into a first chamber 111 and a second chamber 112.
- the power amplifier circuit there is usually a power amplifier tube, one side of the power amplifier tube is connected to the power amplifier input circuit sub-module, and the other side is connected to the power amplifier output circuit sub-module; for example, a certain signal needs to be amplified, at this time, the signal will first be from the power amplifier
- the input circuit sub-module enters the power amplifier tube, and the power amplifier tube amplifies its power, and the amplified signal is output from the power amplifier output circuit sub-module.
- the present disclosure provides a way of laying out the cavity.
- the power amplifier input circuit sub-module of the power amplifier circuit module is located in the first chamber 111.
- the power amplifier output circuit sub-module is located in the second chamber 112, and the power amplifier input circuit sub-module and the power amplifier output circuit sub-module of the power amplifier circuit module are substantially isolated by the cooperation between the spacer 12 and the power amplifier circuit module, thereby reducing the power amplifier input.
- the interference between the signal on the circuit and the signal on the output circuit of the power amplifier makes the amplifier work better.
- a second isolation member 13 is further disposed.
- the power amplifier input circuit sub-module includes at least two power amplifier input circuits, and the power amplifier output circuit sub-module is provided with a circuit having the same number of circuits as the power amplifier input sub-module, for example, the power amplifier input circuit sub-module includes 2-channel power amplifier input circuit, at this time, the power amplifier output circuit sub-module must also be a 2-channel power amplifier output circuit; if the power amplifier input circuit sub-module includes a 3-channel power amplifier input circuit, then the power amplifier output circuit sub-module must also be a 3-way power amplifier output circuit, analogy.
- the second spacer 13 is disposed at an angle with the first spacer 11 and is disposed between the input and output circuits.
- the power amplifier circuit module is usually used by the user in the form of a PCB board.
- the input circuit and the output circuit can be basically isolated to prevent interference between the input signal and the output signal, and each input is also input.
- the circuit and the output circuit are isolated to prevent each input signal or each Mutual interference between the circuit output circuits; on the other hand, the first cavity 12 and the second spacer 13 are disposed in the cavity of the shielding case 11 to change the original cavity space to form a new cavity. Space, when the radio frequency signal is transmitted in the new cavity space, some characteristic properties of the cavity space for the radio frequency signal also change.
- the height of the shielding box perpendicular to the direction of the power amplifier circuit module can be set lower as long as it can completely accommodate the lower power amplifier circuit module. Due to the above configuration, although the height of the shield case set perpendicular to the direction of the power amplifier circuit module is lower, the near-field radiant energy of the power amplifier link in the first chamber 111 and the second chamber 112 is increased, but this At this time, the resonant frequency and the cutoff frequency of the newly formed cavity space are also increased, ensuring that the working frequency band is in a stable state in the cavity, and the waveguide transmission of energy in the cavity is suppressed.
- the transmission energy in the space field is mostly attenuated without affecting the power amplifier circuit.
- the surface current loop of the power amplifier tube is shortened on the power amplifier circuit module, and the stability of the high power amplifier is improved.
- the first spacer 12 is provided with a power amplifier tube groove configured to receive the power amplifier tube 21 of the power amplifier circuit module.
- the shielding box is mounted on the power amplifier circuit module, and the power amplifier input module is placed in the first cavity.
- the power amplifier output circuit is placed in the second chamber 112, and the power amplifier tube 21 that connects the input circuit module and the power amplifier output circuit module and realizes power amplification of the input signal is located in the recess of the power amplifier tube.
- the first spacer 12 and the power amplifier tube 21 together complete the isolation of the power amplifier input circuit and the power amplifier output circuit, and the power amplifier tube does not need to occupy additional space, which is beneficial to the implementation of the miniaturization of the shielding box, and at the same time, the shielding box has better performance. stability.
- the first spacer 12 is also provided with a recess, but the recess is a circuit recess for accommodating the power amplifier signal transmission circuit, and the power amplifier input module is disposed in the first chamber 111.
- the power amplifier output circuit is disposed in the second chamber 112, and the power amplifier tube 21 that connects the input circuit module and the power amplifier output circuit module and realizes power amplification of the input signal is located in the first chamber 111 or the second chamber 112 and is blocked.
- the circuit recess is shared with the first isolation 12 pieces to isolate the power amplifier input circuit module and the power amplifier output circuit module.
- the power tube groove or the circuit groove on the first spacer 12 can be flexibly adjusted according to requirements, for example, the size of the power tube groove just happens to be the power amplifier circuit module.
- the power amplifier tube 21 is stuck in the recess of the power amplifier tube; for the size of the circuit recess, the power amplifier tube 21 can block the circuit recess (as shown in FIG. 3).
- the length can be flexibly set according to the actual situation. It is conceivable that the longer the power amplifier circuit is set, the better the effect is.
- the heights of the first spacer 12 and the second spacer 13 are generally consistent with the height of the cavity, so as to facilitate The gap between the first chamber 111 and the second chamber 112 is smaller, and the shield box has better cavity characteristics when mated with the power amplifier circuit.
- the shielding box body 11 of the shielding box is usually made of a metal material, and a relatively preferable material used is copper or aluminum. A metal material is also generally used for the first spacer 12 and the second spacer 13, and copper or aluminum may also be used.
- the Doherty structure usually has two power amplifier tubes: one for the main power amplifier and the other for the auxiliary power amplifier.
- the main power amplifier works in the B or AB category.
- the amplifier works in category C.
- the two amplifiers do not work in turn, but the main amplifier always works, and the auxiliary amplifier works until the set peak.
- the Doherty structure can also contain more than two power amplifier tubes.
- the radio frequency shielding box introduced in this embodiment can be used with the power amplifier circuit module of the Doherty structure.
- the power amplifier input sub-module of the power amplifier circuit module usually includes at least two power amplifier tubes, and each power amplifier tube is in the power amplifier input sub-module and the power amplifier.
- the output sub-module has a power amplifier input circuit and a power amplifier output circuit corresponding to the power amplifier tube.
- the power amplifier includes a power amplifier circuit module and a radio frequency shielding box in the embodiment, and the power amplifier circuit module is located in the radio frequency shielding box.
- the radio frequency shielding box includes a shielding box body and first and second spacers, a first chamber and a second chamber. When the power amplifier circuit module is placed in the shielding box body, the power amplifier input circuit sub-module and the power amplifier output circuit sub-module of the power amplifier circuit module are respectively located in the first chamber and the second chamber.
- Each of the spacers is equal in height to the cavity, and the power amplifier tube of the power amplifier circuit module is located in the recess of the power amplifier tube of the first spacer.
- This embodiment also protects a radio frequency shielding method, including:
- Step 1 providing a first spacer and a second spacer in the cavity of the shielding box, the first spacer dividing the cavity into a first chamber and a second chamber, the second spacer and the The first spacers are disposed at an angle to each other;
- Step 2 The input circuit sub-module and the output circuit sub-module of the power amplifier circuit module are respectively placed in the first chamber and the second chamber, and the power amplifier circuit input sub-module includes at least two power amplifier input circuits, and the power amplifier output circuit The submodule is provided with a corresponding power amplifier output circuit; the second isolation component is located between each power amplifier input circuit and the output circuit.
- the radio frequency shielding box, the power amplifier and the radio frequency shielding method provided by the disclosure can solve the problem that the radio frequency shielding box can not be miniaturized due to the basic performance of the radio frequency shielding box and the influence of the circuit is small, and the radio frequency shielding box can be achieved.
- the shielding box has better performance and stability, and at the same time realizes the miniaturization effect of the radio frequency shielding box.
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Abstract
本公开提供了一种射频屏蔽盒、功放和射频屏蔽方法，屏蔽盒包括屏蔽盒体、第一隔离件和第二隔离件，该屏蔽盒包括空腔，被配置为容置功放电路模块；第一隔离件设置在该空腔内，并将该空腔划分为第一腔室和第二腔室，所述第二隔离件与所述第一隔离件互成夹角，并设置在各路功放输入电路和输出电路之间；工作时，该屏蔽盒体与功放电路模块相互配合，功放电路模块放置在屏蔽盒体里面。采用上述布局方式对屏蔽盒进行改进可以解决相关技术中由于在兼顾射频屏蔽盒的基本性能及电路影响小的情况下，不能实现射频屏蔽盒的小型化的问题，达到在兼顾射频屏蔽盒性具有较好的性能和稳定性的同时，实现射频屏蔽盒的小型化的效果。
Description
本公开涉及电子设备领域，例如涉及一种射频屏蔽盒、功放和射频屏蔽方法。
随着无线通讯系统的发展和4G/5G的推进，基站设备性能提升和小型化已是主流发展趋势。其中功放模块作为主要放大单元，在整个基站能力提升中占据着主要地位。射频屏蔽盒是功放的重要组成部分之一，其具有防止射频能量向外部泄露的功能，保证基站设备通过EMC(Electro Magnetic Compatibility，电磁兼容性)测试，确保功放链路本身的稳定性。同时，盒体和PCB(Printed circuit board，印刷电路板)中间的空气层占据了较大的体积。射频屏蔽盒屏蔽性能的好坏，以及屏蔽盒与PCB板所构成的空腔对于射频电路的影响是评判屏蔽盒好坏最重要的指标。屏蔽性能主要关注屏蔽盒本身的电密闭性，而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也越小，射频性能越好实现。所以，在能完全容纳PCB板并且保证PCB板电路完整性的情况下，如果直接强制缩小屏蔽盒的体积就可能会加大反射信号对射频模块本身的影响，使得PCB电路板的电路恶化以至出现自激、烧毁等状况。
现有射频屏蔽盒，仅仅是实现了将PCB电路板与外界进行隔离，同时确保盒体对链路的恶化影响在可承受的范围内，这时，对射频屏蔽盒的高度就有较高的要求。所以，在保证屏蔽盒的基本屏蔽性能以及对电路影响较小的情况下，屏蔽盒的小型化设计很难实现。屏蔽盒本身也难以对功放链路本身指标给予额外的有益加成。
发明内容
本公开要解决的主要技术问题是，提供一种射频屏蔽盒、功放和射频屏蔽方法，解决相关技术中在实现射频屏蔽盒小型化的情况下，会产生对功放电路
的负面反射影响。
为解决上述技术问题，本公开提供一种射频屏蔽盒，包括：
屏蔽盒体、第一隔离件和第二隔离件，所述屏蔽盒包括被配置为容置功放电路模块的空腔，所述第一隔离件设置于所述空腔内，将所述空腔划分为第一腔室和第二腔室；所述功放电路模块放置于所述屏蔽盒体内，所述功放电路模块的功放输入电路子模块和功放输出电路子模块分别位于所述第一腔室和第二腔室内；所述功放电路输入子模块包括至少两路功放输入电路，所述功放输出电路子模块设置有相对应路数的功放输出电路；所述第二隔离件与所述第一隔离件互成夹角，并设置在各路功放输入电路和输出电路之间。
在本公开的一种实施例中，所述第一隔离件上设置有被配置为容置所述功放电路模块的功放管的功放管凹槽，所述功放电路模块放置于所述屏蔽盒体内时，所述功放管位于所述凹槽内。
在本公开的一种实施例中，所述功放管凹槽的大小与所述功放电路模块上的功放管的大小相匹配。
在本公开的一种实施例中，所述第一隔离件上设置有被配置为容置所述功放电路模块的功放电路的电路凹槽，所述功放电路模块放置于所述屏蔽盒体内时，所述功放电路位于所述凹槽内。
在本公开的一种实施例中，所述第一隔离件和所述第二隔离件的高度与所述空腔的高度相等。
在本公开的一种实施例中，所述屏蔽盒体、所述第一隔离件和所述第二隔离件的材料为金属材料。
在本公开的一种实施例中，所述屏蔽盒体、所述第一隔离件和所述第二隔离件的材料为铝或铜。
本公开还提供一种功放，包括功放电路模块和上述的射频屏蔽盒，所述功放电路模块位于所述射频屏蔽盒内。
在本公开的一种实施例中，所述功放电路模块包括至少两个功放管。
本公开还提供一种射频屏蔽方法，包括：
在屏蔽盒的空腔内设置第一隔离件和第二隔离件，所述第一隔离件将所述
空腔划分为第一腔室和第二腔室，所述第二隔离件与所述第一隔离件互成夹角设置；
将功放电路模块放置在所述屏蔽盒体内，所述功放电路模块的功放输入电路子模块位于所述第一腔室，所述功放电路模块的功放输出电路子模块位于所述第二腔室，所述功放电路输入子模块包括至少两路功放输入电路，所述功放输出电路子模块设置有相对应路数的功放输出电路；所述第二隔离件位于各路功放输入电路和输出电路之间。
本公开的有益效果是：提供一种射频屏蔽盒、功放和射频屏蔽方法，屏蔽盒包括屏蔽盒体、第一隔离件和第二隔离件，该屏蔽盒体包括空腔，被配置为容置功放电路模块；第一隔离件设置在该空腔内，并将该空腔划分为第一腔室和第二腔室；工作时，该屏蔽盒体与功放电路模块相互配合，功放电路模块放置在屏蔽盒体里面，而此时，功放电路的输入子模块和输出子模块分别位于第一腔室和第二腔室；功放电路输入子模块包括至少两路功放输入电路，功放输出电路子模块设置有相对应路数的功放输出电路；第二隔离件与所述第一隔离件互成夹角，并设置在各路功放输入电路和输出电路之间，当按照上述方式进行布局时，在屏蔽盒能容纳下功放电路模块，并保持该功放电路模块的电路完整性的基础上，可以将该屏蔽盒体的高度做得尽可能低，此时，虽然会存在较多的反射信号，但是由于采用了上述的屏蔽盒体布局方式对屏蔽盒体与功放电路模块之间的空间进行规划可以提高该空间的谐振频率以及截止频率，从而确保功放链路稳定性，增大反射能量的空间传输衰减，在功放工作状态下提供更短的面电流回流路径，减少其对功放电路模块的危害。另外，还可以将功放输入信号和功放输出信号进行隔离。所以，采用上述布局方式对屏蔽盒进行改进可以在兼顾射频屏蔽盒性具有较好的性能和稳定性的同时，实现射频屏蔽盒的小型化。
附图概述
图1为本公开实施例一的射频屏蔽盒的结构示意图；
图2为本公开实施例一的功放电路模块置于射频屏蔽盒内的剖面图；
图3为本公开实施例一的功放电路模块置于射频屏蔽盒内的另一剖面图。
下面通过实施方式结合附图对本公开进行详细说明。
实施例一：
本实施例提供一种射频屏蔽盒，使用该射频屏蔽盒可以在兼顾射频屏蔽盒性具有较好的性能和稳定性的同时，实现射频屏蔽盒的小型化，下面将对其结构进行说明，请参考图1，该射频屏蔽盒包括屏蔽盒体11、第一隔离件12和第二隔离件13，该屏蔽盒包括空腔，该空腔由所述屏蔽盒体11围合而成，用来容置功放电路模块。该第一隔离件12设置在该空腔内，将空腔划分为第一腔室111和第二腔室112。对于功放电路而言，通常具有功放管，功放管的一边连接功放输入电路子模块，另一边连接功放输出电路子模块；例如，需要对某一信号进行放大，此时，该信号会先从功放输入电路子模块进入功放管，功放管对其功率进行放大，被放大的信号会从功放输出电路子模块输出。
由于功放输入电路子模块上的信号是功率相对较低的信号，而功放输出子模块上的信号是功率相对较大的信号，若二者同处一个腔室，大功率信号可能通过空间对低信号区域产生干扰，所以，将本公开提供一种对该空腔进行布局的方式，当功放电路模块放置在屏蔽盒内时，功放电路模块的功放输入电路子模块位于第一腔室111内，功放输出电路子模块位于第二腔室112内，通过隔离件12与功放电路模块之间的配合实现将该功放电路模块的功放输入电路子模块和功放输出电路子模块进行基本隔离，减少功放输入电路上的信号和功放输出电路上的信号的干扰，使功放效果更好。同时，还设置第二隔离件13，功放输入电路子模块包括至少两路功放输入电路，功放输出电路子模块设置有与该功放输入子模块相同路数的电路，例如，功放输入电路子模块包括2路功放输入电路，此时功放输出电路子模块必然也是2路功放输出电路；如果功放输入电路子模块包括3路功放输入电路，那么功放输出电路子模块必然也是3路功放输出电路，以此类推。该第二隔离件13与第一隔离件11互成夹角设置，并且设置在各路输入输出电路之间。
在实施时，功放电路模块通常以PCB板的方式供用户使用，采用上述方式：一方面可以将输入电路和输出电路进行基本隔离，防止输入信号和输出信号之间相互干扰，还将各路输入电路和输出电路进行隔离，防止各路输入信号或各
路输出电路之间的相互干扰；另一方面，通过在屏蔽盒体11为何成的空腔内设置第一隔离件12和第二隔离件13改变原有的腔体空间，形成新的腔体空间，当射频信号在该新的腔体空间中传输时，该腔体空间针对该射频信号而言，其某些特征属性也会发生改变。此时，将功放电路模块放置于所述屏蔽盒内时，可以将该屏蔽盒垂直于所述功放电路模块方向的高度设置得较低，只要其能完整地容纳下功放电路模块。由于采用上述结构，虽然屏蔽盒垂直于所述功放电路模块方向的高度设置得较低会使得第一腔室111和第二腔室112内的功放链路的近场辐射能量增大，但此时，新形成的该腔体空间的谐振频率和截止频率也会增高，确保工作频段在腔体中处于稳定状态的同时，使得能量在腔体中的波导式传输得到抑制。因此，即使腔体降得比较低，空间场中的传输能量也大都会被衰减而不会对功放电路造成影响。同时，功放电路模块上缩短功放管的面电流回路，提了高功放稳定性。
对于功放电路模块与隔离件之间的配合方式请参见图2。在第一隔离件12上设置有被配置为容置功放电路模块的功放管21的功放管凹槽，在使用屏蔽盒时，屏蔽盒安装在功放电路模块上，功放输入模块置于第一腔室111内，功放输出电路置于第二腔室112内，连接输入电路模块和功放输出电路模块并实现对输入信号进行功率放大的功放管21位于功放管凹槽内。此时第一隔离件12和功放管21共同完成功放输入电路和功放输出电路的隔离，并且功放管不需要额外再占用空间，有利于屏蔽盒小型化的实施，同时使屏蔽盒具有较好的稳定性。另外一种类似的方式，请参见图3，第一隔离件12上也设置有凹槽，但是该凹槽是容置功放信号传输电路的电路凹槽，功放输入模块置于第一腔室111内，功放输出电路置于第二腔室112内，连接输入电路模块和功放输出电路模块并实现对输入信号进行功率放大的功放管21位于第一腔室111或第二腔室112内并遮挡住电路凹槽，与第一隔离12件共同实现对功放输入电路模块和功放输出电路模块的隔离。
应当理解的是，在生产射频屏蔽盒的时候，对于第一隔离件12上功放管凹槽或电路凹槽是可以根据需要进行灵活调整的，例如功放管凹槽的大小刚好将功放电路模块的功放管21卡在功放管凹槽内；针对电路凹槽的大小，则可以是功放管21将所述电路凹槽遮挡住(如图3所示)。另外，对于第二隔离件13，在生产射频屏蔽盒时，也可以根据实际情况灵活设置其长短，可以想到，在不破坏功放电路的情况下，将其设置得越长，效果越好。
为了实现更好的隔离效果，以及使第一隔离件12与功放电路模块具有更好的隔离效果，通常将第一隔离件12和第二隔离件13的高度与空腔的高度一致，以便于第一腔室111和第二腔室112之间空隙更小，同时使屏蔽盒与功放电路相配合时具有更好的腔体特性。为了屏蔽功放电路模块上的电磁信号，通常屏蔽盒的屏蔽盒体11使用的材料为金属材料，使用的比较多的较为理想的材料是铜或者铝。对于第一隔离件12和第二隔离件13通常也使用金属材料，也可以使用铜或铝。
随着4G/5G的推进，Doherty被越来越多的使用，Doherty结构通常具有2个功放管：一个适用于主功放，另一个适用于辅助功放，主功放工作在B类或者AB类，辅助功放工作在C类。两个功放不是轮流工作，而是主功放一直工作，辅助功放到设定的峰值才工作。当然Doherty结构也可以包含两个以上功放管。对于本实施例中介绍的射频屏蔽盒可配合Doherty结构的功放电路模块使用，此时，功放电路模块的功放输入子模块通常包括至少两个功放管，每个功放管在功放输入子模块和功放输出子模块上都有与该功放管相对应的功放输入电路和功放输出电路。
本实施例还保护一种功放，该功放包括功放电路模块和本实施例中的射频屏蔽盒，功放电路模块位于射频屏蔽盒内。射频屏蔽盒包括屏蔽盒体和第一隔离件和第二隔离件，第一腔室、第二腔室。将功放电路模块放置在屏蔽盒体内时，功放电路模块的功放输入电路子模块和功放输出电路子模块分别位于所述第一腔室和第二腔室内。各个隔离件与空腔的高度相等，功放电路模块的功放管位于第一隔离件的功放管凹槽内。
本实施例还保护一种射频屏蔽方法，包括：
步骤一：在屏蔽盒的空腔内设置第一隔离件和第二隔离件，该第一隔离件将所述空腔划分为第一腔室和第二腔室，第二隔离件与所述第一隔离件互成夹角设置；
步骤二：将所述功放电路模块的输入电路子模块和输出电路子模块分别放置于所述第一腔室和第二腔室，功放电路输入子模块包括至少两路功放输入电路，功放输出电路子模块设置有相对应路数的功放输出电路；第二隔离件位于各路功放输入电路和输出电路之间。
以上内容是结合实施方式对本公开所作的详细说明，不能认定本公开的实
施只局限于这些说明。对于本公开所属技术领域的普通技术人员来说，在不脱离本公开实施例范围的前提下，还可以做出若干简单推演或替换，都应当视为属于本公开的保护范围。
本公开提供的射频屏蔽盒、功放和射频屏蔽方法可以解决相关技术中由于在兼顾射频屏蔽盒的基本性能及电路影响小的情况下，不能实现射频屏蔽盒的小型化的问题，达到在兼顾射频屏蔽盒性具有较好的性能和稳定性的同时，实现射频屏蔽盒的小型化的效果。
Claims (10)
- 一种射频屏蔽盒，包括：屏蔽盒体、第一隔离件和第二隔离件，所述屏蔽盒包括被配置为容置功放电路模块的空腔，所述第一隔离件设置于所述空腔内，将所述空腔划分为第一腔室和第二腔室；所述功放电路模块放置于所述屏蔽盒体内，所述功放电路模块的功放输入电路子模块和功放输出电路子模块分别位于所述第一腔室和第二腔室内；所述功放电路输入子模块包括至少两路功放输入电路，所述功放输出电路子模块设置有相对应路数的功放输出电路；所述第二隔离件与所述第一隔离件互成夹角，并设置在各路功放输入电路和输出电路之间。
- 如权利要求1所述的射频屏蔽盒，其中，所述第一隔离件上设置有被配置为容置所述功放电路模块的功放管的功放管凹槽，所述功放电路模块放置于所述屏蔽盒体内时，所述功放管位于所述凹槽内。
- 如权利要求2所述的射频屏蔽盒，其中，所述功放管凹槽的大小与所述功放电路模块上的功放管的大小相匹配。
- 如权利要求1所述的射频屏蔽盒，其中，所述第一隔离件上设置有被配置为容置所述功放电路模块的功放电路的电路凹槽，所述功放电路模块放置于所述屏蔽盒体内时，所述功放电路位于所述凹槽内。
- 如权利要求1-4任意一项所述的射频屏蔽盒，其中，所述第一隔离件和所述第二隔离件的高度与所述空腔的高度相等。
- 如权利要求1所述的射频屏蔽盒，其中，所述屏蔽盒体、所述第一隔离件和所述第二隔离件的材料为金属材料。
- 如权利要求6所述的射频屏蔽盒，其中，所述屏蔽盒体、所述第一隔离件和所述第二隔离件的材料为铝或铜。
- 一种功放，包括功放电路模块和如权利要求1-7任意一项所述的射频屏蔽盒，所述功放电路模块位于所述射频屏蔽盒内。
- 如权利要求8所述的功放，其中，所述功放电路模块包括至少两个功放管。
- 一种射频屏蔽方法，包括：在屏蔽盒的空腔内设置第一隔离件和第二隔离件，所述第一隔离件将所述空腔划分为第一腔室和第二腔室，所述第二隔离件与所述第一隔离件互成夹角设置；将功放电路模块放置在所述屏蔽盒体内，所述功放电路模块的功放输入电路子模块位于所述第一腔室，所述功放电路模块的功放输出电路子模块位于所述第二腔室，所述功放电路输入子模块包括至少两路功放输入电路，所述功放输出电路子模块设置有相对应路数的功放输出电路；所述第二隔离件位于各路功放输入电路和输出电路之间。
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