A microwave shielding device and microwave assembly

Abstract

This invention provides a microwave shielding device and a microwave assembly. The device includes: a metal frame, and at least one metal isolation wall disposed inside the metal frame. The metal isolation wall divides the interior of the metal frame into multiple non-communicating regions. The metal frame and the metal isolation wall are detachably connected. A first metal shielding cover is provided at one end of the metal frame facing the opening direction. The metal frame and the first metal shielding cover are detachably connected. The metal frame, the metal isolation wall, and the first metal shielding cover constitute multiple open cavity bodies. This invention can form multiple non-communicating isolated regions through the metal frame and at least one metal isolation wall. The metal isolation wall is a detachable structure. The microwave shielding device can be used to assemble microwave assemblies. During the later debugging of the microwave assembly, debugging can be achieved by disassembling and assembling the metal isolation wall, making it suitable for the later debugging of microwave assemblies.

Description

Technical Field

[0001] This invention relates to the field of microwave shielding technology, and more particularly to a microwave shielding device and microwave components. Background Technology

[0002] Microwave assemblies are products assembled from various microwave components. With the miniaturization, integration, and weight reduction of microwave assemblies, problems such as internal signal crosstalk and signal distortion caused by cavity effects have become prominent. Metal shielded cavities, with their good shielding characteristics and high isolation, are a commonly used solution. Metal shielded cavities isolate each microwave component through multiple enclosed metal cavities, ensuring signal isolation and reducing signal crosstalk. However, for increasingly complex microwave assemblies, due to weight and space constraints, it is impossible to design an independent metal cavity for each microwave component.

[0003] Generally, by combining experience in the structural design of metal shielding cavities with microwave component simulation technology, a simplified design of the metal shielding cavity structure is achieved. Then, based on the design structure, molds are made, and integrated metal shielding cavities are mass-produced.

[0004] The above-described metal-shielded cavity design is suitable for most microwave components with simple circuits and regular structures. However, as microwave component structures become increasingly complex, the requirements for design experience and simulation methods are becoming more demanding. Simulation technology alone cannot fully simulate all conditions of a microwave component. For example, there is signal crosstalk between microwave devices within the component, cavity effects, and self-oscillation caused by external signals due to different application environments. In practical applications, post-processing is often required to address these issues. Traditional integrated metal-shielded cavities, with their fixed structure, are unsuitable for post-processing of microwave components. Summary of the Invention

[0005] This invention provides a microwave shielding device and microwave assembly to solve the problem that traditional integrated metal shielding cavities, with their fixed structure, are unsuitable for later debugging of microwave assemblies.

[0006] In a first aspect, embodiments of the present invention provide a microwave shielding device, comprising: a metal frame, and at least one metal isolation wall disposed inside the metal frame. The metal isolation wall divides the interior of the metal frame into multiple non-communicating regions. The metal frame and the metal isolation wall are detachably connected. A first metal shielding cover is provided at one end of the metal frame facing the opening direction. The metal frame and the first metal shielding cover are detachably connected. The metal frame, the metal isolation wall, and the first metal shielding cover constitute multiple open mouths.

[0007] In one possible implementation, the inner wall of the metal frame is provided with a slot for connecting to the metal partition wall.

[0008] In one possible implementation, for each metal partition wall, the inner walls of the metal outer frame facing each other are provided with multiple slots for connecting the metal partition wall.

[0009] In one possible implementation, screw holes for connecting the metal partition wall are provided on the side wall of the metal frame.

[0010] In one possible implementation, a second metal shielding cover is provided inside the oral cavity on the side facing the first metal shielding cover. The second metal shielding cover is detachably connected to the inner wall of the metal outer frame and the inner wall of the metal isolation wall.

[0011] In one possible implementation, the inner wall of the metal frame and the inner wall of the metal partition wall are provided with a stepped structure connecting to the second metal shielding cover at the end facing the first metal shielding cover.

[0012] In one possible implementation, the step structure is a multi-level step structure.

[0013] In one possible implementation, the inner wall of the metal frame or the inner wall of the first metal shielding cover is further provided with a metal spring. The metal spring is used to connect to the grounding terminal of the microwave device.

[0014] In one possible implementation, the metal spring includes a first contact metal sheet, a spring sheet, and a second contact metal sheet connected in sequence. The first contact metal sheet is detachably connected to the inner wall of the metal outer frame or the inner wall of the first metal shield. The second contact metal sheet is detachably connected to the grounding terminal of the microwave device.

[0015] Secondly, embodiments of the present invention provide a microwave assembly, the microwave assembly including a circuit board and a plurality of microwave devices disposed on the circuit board. The microwave assembly further includes a microwave shielding device as described in any of the claims of the first aspect. The microwave devices are disposed inside the microwave shielding device.

[0016] This invention provides a microwave shielding device and a microwave assembly. The device includes: a metal frame and at least one metal isolation wall disposed inside the metal frame. The metal isolation wall isolates the interior of the metal frame into multiple non-communicating regions. The metal frame and the metal isolation wall are detachably connected. A first metal shielding cover is provided at one end of the metal frame facing the opening direction. The metal frame and the first metal shielding cover are detachably connected. The metal frame, the metal isolation wall, and the first metal shielding cover constitute multiple open cavity bodies. This application uses the metal frame and at least one metal isolation wall to form multiple non-communicating isolation regions. The metal isolation wall is a detachable structure. The microwave shielding device can be used to assemble microwave assemblies. During the later debugging of microwave assemblies, debugging can be achieved by removing and installing the metal isolation wall, which is suitable for the later debugging of microwave assemblies. For example, the performance changes of microwave assemblies before and after removing and installing the metal isolation wall can be compared to determine unnecessary metal isolation walls and reduce the weight of microwave assemblies. For example, the cavity structure can be changed by removing and installing the metal isolation wall to reduce the impact of cavity effects on the performance of microwave assemblies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a top view of a metal shielding cover in the prior art;

[0019] Figure 2 This is a top view of a microwave shielding device provided in an embodiment of the present invention;

[0020] Figure 3 This is a side view of the microwave shielding device provided in an embodiment of the present invention;

[0021] Figure 4 This is a top view of another microwave shielding device provided in an embodiment of the present invention;

[0022] Figure 5 This is a top view of the third microwave shielding device provided in the embodiments of the present invention;

[0023] Figure 6 This is a top view of the microwave shielding device with a slot provided in an embodiment of the present invention;

[0024] Figure 7 This is a side view of the microwave shielding device with a stepped structure provided in an embodiment of the present invention;

[0025] Figure 8This is a side view of a microwave shielding device with a multi-step structure provided in an embodiment of the present invention;

[0026] Figure 9 This is a side view of the microwave shielding device with metal springs provided in an embodiment of the present invention. Detailed Implementation

[0027] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0028] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0029] The implementation of the present invention will be described in detail below with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a metal shielding cover in the prior art. (Refer to...) Figure 1 The metal shielding cover comprises an integrated metal shielding frame and a metal shielding cover. The integrated metal shielding frame contains multiple non-interconnected areas. During microwave assembly, the integrated metal shielding frame is mounted on the circuit board 200 of the microwave assembly. The non-interconnected areas within the integrated metal shielding frame isolate the microwave devices 210. A metal shielding cover is mounted on top of the integrated metal shielding frame, forming multiple enclosed metal cavities. The integrated metal shielding cover isolates the microwave devices 210 on the circuit board 200 of the microwave assembly through these multiple enclosed metal cavities. The integrated metal shielding cavity, designed, molded, and mass-produced based on simulation results, has a simple manufacturing method and low cost. However, traditional integrated metal shielding cavities have a fixed structure and are not suitable for later debugging of microwave assemblies.

[0031] This invention provides a microwave shielding device and microwave assembly to solve the problem that traditional integrated metal shielding cavities, with their fixed structure, are unsuitable for later debugging of microwave assemblies.

[0032] Figure 2 This is a top view of a microwave shielding device provided in an embodiment of the present invention. Figure 3 This is a side view of the microwave shielding device 100 provided in an embodiment of the present invention. (Refer to...) Figure 2 and Figure 3 The microwave shielding device 100 includes:

[0033] A metal frame 110, and at least one metal partition wall 120 disposed inside the metal frame 110. The metal partition wall 120 divides the interior of the metal frame 110 into multiple non-communicating areas. The metal frame 110 and the metal partition wall 120 are detachably connected. A first metal shielding cover 130 is provided at one end of the metal frame 110 facing the opening direction. The metal frame 110 and the first metal shielding cover 130 are detachably connected. The metal frame 110, the metal partition wall 120, and the first metal shielding cover 130 constitute multiple open mouths.

[0034] For example, the top view shape of the metal partition wall 120 includes a straight line or an L-shape. Figure 4 This is a top view of another microwave shielding device provided in an embodiment of the present invention. Figure 5 This is a top view of the third microwave shielding device provided in an embodiment of the present invention. (Refer to...) Figure 4 and Figure 5 The top view is a view of the microwave shielding device 100 seen through the first metal shielding cover 130. The two ends of the straight metal partition wall 120 can be connected to the two opposing inner walls of the metal outer frame 110. One end of the straight metal partition wall 120 can be connected to the inner wall of the metal outer frame 110, and the other end can be connected to the side of another metal partition wall 120. The two ends of the straight metal partition wall 120 can be respectively connected to the sides of two other metal partition walls 120.

[0035] The two ends of the L-shaped metal partition wall 120 can be connected to the two intersecting inner walls of the metal outer frame 110. One end of the L-shaped metal partition wall 120 can be connected to the inner wall of the metal outer frame 110, and the other end can be connected to the side of another metal partition wall 120. The two ends of the L-shaped metal partition wall 120 can be respectively connected to the side of two other metal partition walls 120. For example, two intersecting straight metal partition walls 120 can share one end to form an L-shaped metal partition wall 120.

[0036] According to the layout and signal shielding requirements of each microwave device 210, one or more metal isolation walls 120 and different types of metal isolation walls 120 can be set to divide the interior of the metal frame 110 into multiple non-interconnected areas.

[0037] The metal frame 110 and the metal partition wall 120 are detachably connected. For example, the connection between each metal partition wall 120 is detachable. During microwave assembly commissioning, removing and installing metal partition walls 120 at different locations can change the layout of the shielding cavity. For example, the metal outer shell and the metal partition wall 120 are detachably connected by a slot or detachably by screws.

[0038] For example, the materials of the metal frame 110 and the metal partition wall 120 may include, but are not limited to, one or more of the following: brass, nickel silver, aluminum, stainless steel and tinplate.

[0039] This invention provides a microwave shielding device 100, which comprises multiple non-communicating isolation areas formed by a metal frame 110 and at least one metal isolation wall 120. The metal isolation wall 120 is a detachable structure. The microwave shielding device 100 can be used to assemble microwave components. During later microwave component debugging, debugging can be achieved by removing and installing the metal isolation wall 120, making it suitable for later-stage debugging of microwave components. For example, the performance changes of the microwave component before and after removing and installing the metal isolation wall 120 can be compared to identify unnecessary metal isolation walls 120 and reduce the weight of the microwave component. For example, the cavity structure can be changed by removing and installing the metal isolation wall 120 to avoid resonant point oscillation and reduce the impact of cavity effects on the performance of the microwave component.

[0040] In one possible implementation, the sidewall of the metal frame 110 has screw holes for connecting to the metal partition wall 120. The metal frame 110 and the metal partition wall 120 are connected by screws installed in the screw holes. For example, screws can be installed through the screw holes on the outside of the metal frame 110 to fix the metal frame 110 and the internal metal partition wall 120. Exemplarily, the metal shielding cover has screw holes for connecting to the metal partition wall 120. The metal shielding cover and the metal partition wall 120 are detachably connected by screws. While screw fixing is simple in structure and easy to manufacture, the number of screw holes is limited, and gaps exist between the metal frame 110 and the metal partition wall 120, reducing the isolation level.

[0041] Figure 6 This is a top view of the microwave shielding device with a slot provided in an embodiment of the present invention. (Refer to...) Figure 6 :

[0042] In one possible implementation, the inner wall of the metal frame 110 is provided with a slot for connecting the metal partition wall 120. Exemplarily, the shape of the slot corresponds to the cross-sectional shape of the end face of the metal partition wall 120. During installation, the metal partition wall 120 is fixed to the metal frame 110 via the slot. Exemplarily, the slot is a rectangular groove, the width of which is the same as the thickness of the metal partition wall 120. During installation, the metal partition wall 120 can be snapped into the slot. Exemplarily, the slot is a trapezoidal groove, and the end face shape of the metal partition wall 120 is an inverted trapezoid. Exemplarily, the slot is a triangular groove, and the end face shape of the metal partition wall 120 is an inverted triangle. Exemplarily, the side wall of the metal partition wall 120 may also be provided with slots for connecting other metal partition walls 120. The slot fixing method is simple in structure and easy to manufacture.

[0043] Both screw-fixing and slot-fixing methods allow for detachable connections between the metal frame 110 and the metal isolation wall 120, and between the metal isolation walls 120 themselves. This facilitates later debugging of the microwave components. In some applications, simply removing or installing a single metal isolation wall 120 often fails to resolve the cavity effect. Even if changing the shielding cavity structure solves the cavity effect, removing the metal isolation wall 120 increases crosstalk in the internal microwave devices 210, highlighting the isolation issue again. Therefore, the inventors of this application propose another improvement approach.

[0044] In one possible implementation, for each metal partition wall 120, the inner walls of the metal outer frame 110 facing each other are provided with a plurality of slots for connecting the metal partition wall 120.

[0045] Multiple sets of slots are provided on the facing inner walls of the metal frame 110 between the microwave devices 210, with each set of slots corresponding to the other. Each set of slots can be used to install the metal isolation wall 120. For example, during microwave assembly debugging, the position of the metal isolation wall 120 can be adjusted by installing it in different sets of slots, thereby changing the cavity structure and avoiding cavity effects. For example, during microwave assembly debugging, metal isolation walls 120 can also be added to adjacent / close positions of existing metal isolation walls 120, which can both change the cavity structure to avoid cavity effects and reduce signal crosstalk between microwave components, thereby improving isolation.

[0046] The microwave components have a high degree of integration, and the spacing between the microwave devices 210 is small. In some applications, the spacing between the microwave devices 210 is too small to achieve the aforementioned method of providing multiple slots for connecting the metal isolation wall 120 on the facing inner walls of the metal frame 110, making it impossible to avoid cavity effects by adjusting the position of the metal isolation wall 120. Therefore, the inventors of this application propose another improvement approach.

[0047] Figure 7 This is a side view of the microwave shielding device with a stepped structure provided in an embodiment of the present invention. (Refer to...) Figure 7 :

[0048] In one possible implementation, a second metal shielding cover 140 is provided inside the opening on the side facing the first metal shielding cover 130. The second metal shielding cover 140 is detachably connected to the inner wall of the metal outer frame 110 and the inner wall of the metal isolation wall 120.

[0049] The microwave shielding device 100 has a first metal shielding cover 130 on its top. The metal frame 110, metal isolation wall 120, and first metal shielding cover 130 form a semi-enclosed shielding cavity, i.e., an open cavity. Inside the open cavity, below the first shielding cover, a removable second metal shielding cover 140 is provided on the inner wall of the metal frame 110 and metal isolation wall 120. After the microwave shielding device 100 is assembled with the microwave components, it can isolate the microwave device 210 from external signals, avoiding external signal interference. The microwave signal emitted by the microwave device 210 itself may resonate at a certain frequency within the shielding cavity, i.e., a cavity effect. The cavity effect will seriously affect the normal operation of the microwave device 210. The microwave shielding device 100 provided in this embodiment of the invention includes a removable second metal shielding cover 140 within its internal shielding cavity. By removing and installing the second metal shielding cover 140, the cavity structure of the internal shielding cavity can be changed, the resonant frequency can be altered, and the cavity effect can be avoided.

[0050] For example, the second metal shielding cover 140 can be connected to the inner wall of the metal outer frame 110 and the inner wall of the metal isolation wall 120 by screws. For example, the second metal shielding cover 140 can be connected to the inner wall of the metal outer frame 110 and the inner wall of the metal isolation wall 120 by laser welding.

[0051] In one possible implementation, the inner wall of the metal frame 110 and the inner wall of the metal partition wall 120 facing the first metal shielding cover 130 are provided with a stepped structure that connects to the second metal shielding cover 140.

[0052] During the assembly of the microwave shielding device 100, the second metal shielding cover 140 is placed on the stepped structure of the metal outer frame 110 and the metal isolation wall 120. For example, during the assembly of the microwave components, the second metal shielding cover can be installed on the stepped structure of the metal outer frame and the metal isolation wall 120 using a laser sealing process.

[0053] During microwave component debugging, simply changing the cavity structure by disassembling and reassembling the second metal shielding cover 140 as described above may not be able to avoid resonant frequencies or cavity effects. Therefore, the inventors of this application have made further improvements.

[0054] Figure 8 This is a side view of a microwave shielding device with a multi-step structure provided in an embodiment of the present invention. (Refer to...) Figure 8 :

[0055] In one possible implementation, the stepped structure is a multi-level stepped structure. Specifically, the inner walls of the metal outer frame 110 and the metal partition wall 120, facing the first metal shielding cover 130, have multiple stepped sections that connect to the second metal shielding cover 140. For example, different height cavity structures can be achieved by installing second metal shielding covers 140 with dimensions corresponding to each step. Compared to embodiments without second metal shielding covers 140, this increases isolation and allows adjustment of the cavity height, avoiding cavity effects.

[0056] The grounding method of microwave device 210 in a microwave assembly is typically as follows: the grounding terminal of microwave device 210 is connected to the grounding pad on the upper surface of circuit board 200. The grounding pad on the upper surface of circuit board 200 is connected to the grounding pad on the lower surface. The grounding pad on the lower surface of circuit board 200 is usually connected to the equipment housing, thus grounding microwave device 210 to the equipment housing. Circuit board 200 has high integration and complex circuitry, and the grounding circuit cross-section is typically small. In high-frequency, high-power microwave applications, grounding problems may occur, and subsequent debugging cannot change the structure of circuit board 200, limiting debugging methods. Therefore, the inventors of this application have made corresponding improvements based on this solution.

[0057] Figure 9 This is a side view of a microwave shielding device with metal springs provided in an embodiment of the present invention. (Refer to...) Figure 9 :

[0058] In one possible implementation, the inner wall of the metal frame 110 or the inner wall of the first metal shield is further provided with a metal spring 150. The metal spring 150 is used to connect to the grounding terminal of the microwave device 210.

[0059] The microwave shielding device 100 provided in this embodiment of the invention has a metal spring 150 disposed on its inner wall. The metal spring 150 is connected to the grounding terminal of the microwave device 210, and the microwave device 210 is grounded through the metal spring 150. The metal spring 150 is relatively large compared to the internal circuit of the circuit board 200, resulting in better grounding effect. Normally, the microwave shielding device 100 is directly connected to the equipment housing; grounding through the metal spring 150 shortens the grounding distance and improves the grounding effect.

[0060] In one possible implementation, the metal spring 150 includes a first contact metal sheet, a spring sheet, and a second contact metal sheet connected in sequence. The first contact metal sheet is detachably connected to the inner wall of the metal outer frame 110 or the inner wall of the first metal shield. The second contact metal sheet is detachably connected to the grounding terminal of the microwave device 210.

[0061] This invention provides a microwave assembly, which includes a circuit board 200 and a plurality of microwave devices 210 disposed on the circuit board 200. The microwave assembly also includes a microwave shielding device 100 as provided in any of the above embodiments. The microwave devices 210 are disposed inside the microwave shielding device 100.

[0062] This invention provides a design method for a microwave shielding device for a microwave assembly. Based on the layout and simulation of each microwave component 210 in the microwave assembly, the structure of the microwave shielding device is designed. The internal metal isolation wall 120 of the microwave shielding device is designed as a detachable structure. Through the redundant design of the metal isolation wall 120 structure, the structure of the assembly can be adjusted during later performance debugging, improving the success rate and reliability of product design and avoiding repeated design and manufacturing. This invention, through a non-fixed structure design approach, can greatly improve the efficiency of structural design, increase the compatibility of RF circuit design schemes, make the debugging of the assembly product more flexible, reduce the limitations of fixed structures, compensate for the deficiencies of experience-based design and simulation, increase design fault tolerance, improve assembly reliability, and to a certain extent avoid secondary design and reduce the design cycle. It has broad applicability in the field of microwave assemblies.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A microwave shielding device, characterized in that, Includes a metal frame and at least one metal partition wall disposed inside the metal frame; The metal partition wall divides the interior of the metal frame into multiple non-connected areas; The metal outer frame and the metal isolation wall are detachably connected; by disassembling and assembling the metal isolation wall, the cavity structure can be changed to avoid resonance point oscillation. The metal frame is provided with a first metal shielding cover at one end facing the opening; the metal frame and the first metal shielding cover are detachably connected. The metal frame, the metal partition wall, and the first metal shielding cover constitute multiple open mouth bodies; The inner wall of the metal frame is provided with slots for connecting the metal partition wall; for each metal partition wall, the inner wall of the metal frame facing each other is provided with multiple slots for connecting the metal partition wall; by installing the metal partition wall in different sets of slots, the position of the metal partition wall can be adjusted, the cavity structure can be changed, and the cavity effect can be avoided. A second metal shielding cover is provided inside the opening cavity on the side facing the first metal shielding cover; wherein, the second metal shielding cover is detachably connected to the inner wall of the metal outer frame and the inner wall of the metal isolation wall; the inner wall of the metal outer frame and the inner wall of the metal isolation wall are provided with a stepped structure connecting the second metal shielding cover at the end facing the first metal shielding cover; the stepped structure is a multi-level stepped structure; by disassembling and assembling the second metal shielding cover, the cavity structure of the internal shielding cavity is changed, the resonant frequency is changed, and the cavity effect is avoided.

2. The microwave shielding device as described in claim 1, characterized in that, The side walls of the metal frame are provided with screw holes for connecting to the metal partition wall.

3. The microwave shielding device as described in claim 1, characterized in that, The inner wall of the metal outer frame or the inner wall of the first metal shielding cover is also provided with a metal spring sheet; The metal spring is used to connect to the grounding terminal of the microwave device.

4. The microwave shielding device as described in claim 3, characterized in that, The metal spring includes a first contact metal sheet, a spring sheet, and a second contact metal sheet connected in sequence. The first contact metal piece is detachably connected to the inner wall of the metal outer frame or the inner wall of the first metal shielding cover. The second contact metal piece is used for detachable connection with the grounding terminal of the microwave device.

5. A microwave component, characterized in that, The microwave assembly includes a circuit board and a plurality of microwave devices disposed on the circuit board; The microwave assembly further includes the microwave shielding device as described in any one of claims 1 to 4; The microwave device is located inside the microwave shielding device.

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