Antenna module and electronic equipment

Abstract

The invention provides an antenna module and electronic equipment. The antenna module comprises a metal shielding cover; the circuit board is connected with the metal shielding cover to form a cavity structure with an opening side; wherein the circuit board is of a double-layer board structure and comprises a TOP layer and a BOT layer, the TOP layer and the BOT layer are both provided with feed coupling wires, and the feed coupling wires of the TOP layer and the feed coupling wires of the BOT layer are electrically connected through via holes to form an integral wiring structure. The cavity structure is formed between the circuit board and the metal shielding cover, so that the radiation space of the antenna can be increased, and the radiation efficiency of the antenna is improved; by adopting a double-layer plate structure, arranging the feed coupling wires on the TOP layer and the BOT layer respectively and electrically connecting the feed coupling wires through the via holes to form an integral wiring structure, the effective length of the feed coupling wires can be effectively increased, the radiation range of the antenna can be expanded, and better antenna performance can be realized in a limited space.

Description

Technical Field

[0001] The present invention relates to the field of terminal antennas, and in particular to an antenna module and electronic equipment. Background Art

[0002] The personal computer (PC) market has been segmented into various product forms such as Desktop, Tablet and Notebook according to different application scenarios and functional requirements. Among them, Notebook occupies an important position in the market with its unique advantages: compared with Desktop, Notebook has the inherent advantage of strong portability; compared with Tablet, Notebook integrates independent mechanical key keyboard and touchpad, which can provide more accurate positioning and input functions, and can better meet the office needs of users. The all-metal body has gradually become the mainstream choice for high-end Notebooks due to its excellent texture, sturdy and durable characteristics and excellent heat dissipation performance. At the same time, with the growth of mobile office demand, wireless network connection capability has become a standard feature of Notebook, and the application of wireless communication technologies such as Wi-Fi and Bluetooth has become more and more extensive.

[0003] However, the application of an all-metal body also brings new technical challenges. Since metal materials have the characteristics of reflection and absorption of electromagnetic waves, they will significantly affect the transmission effect of wireless signals, resulting in reduced antenna signal radiation efficiency and decreased communication quality. Especially in the context of the gradual popularization of 5G communication technology, high-frequency band signals are more sensitive to metal shielding, which makes it a more challenging task to achieve good antenna performance in a limited space. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of poor performance of wireless local area network under full metal shell.

[0005] A first aspect of the present invention provides an antenna module, comprising:

[0006] Metal shielding cover;

[0007] A circuit board connected to the metal shielding cover to form a cavity structure with an open side;

[0008] The circuit board is a double-layer board structure, including a TOP layer and a BOT layer. Both the TOP layer and the BOT layer are provided with feed coupling traces. The feed coupling traces of the TOP layer and the feed coupling traces of the BOT layer are electrically connected through vias to form an overall trace structure.

[0009] Furthermore, the TOP layer includes a clearance area and a non-clearance area connected to one side of the clearance area, the BOT layer is arranged in the non-clearance area, and the projection of the metal shielding cover covers the TOP layer and the BOT layer.

[0010] Furthermore, the RF antenna feed tuning region is provided with a matching position for setting inductor and capacitor components to optimize the overall resonant impedance.

[0011] Furthermore, the TOP layer also includes a radio frequency antenna feed tuning region, and the radio frequency antenna feed tuning region connects the feed coupling trace to the radio frequency end.

[0012] Furthermore, the metal shielding cover comprises:

[0013] Shield cover top cover;

[0014] Metal retaining walls are respectively arranged around the sides of the top cover of the shielding case;

[0015] The support member is arranged on a side of the top cover of the shielding cover which is not surrounded by the metal retaining wall.

[0016] Furthermore, the length of the feed coupling line is 1 / 4 wavelength of the 2.4G frequency band.

[0017] Furthermore, the length and width of the metal shielding cover are 1 / 2 wavelength of the 5G frequency band.

[0018] A second aspect of the present invention provides an electronic device, using the antenna module as described in any one of the above items, and further comprising:

[0019] The metal shell comprises a first shell and a second shell connected by a rotating shaft to form a gap area, wherein the second shell comprises a first metal back shell and a second metal back shell arranged opposite to each other, and the antenna module is arranged in the second shell with its opening side facing the gap area;

[0020] A first conductive medium connecting the antenna module and the first shell;

[0021] The second conductive medium connects the antenna module and the second shell.

[0022] Furthermore, the total length of the slot area is twice the wavelength of the 2.4G frequency band, and the end of the feed coupling line of the antenna module is 1 / 2 wavelength away from the rotating shaft of the 2.4G frequency band.

[0023] Furthermore, it also includes a third conductive medium, which is arranged in the gap area and 1 times the wavelength of the 2.4G frequency band of the rotating shaft, and is used to connect the first shell and the second shell.

[0024] Compared with the prior art, the present invention includes at least the following beneficial effects: by forming a cavity structure between the circuit board and the metal shielding cover, the radiation space of the antenna can be increased and the radiation efficiency of the antenna can be improved; by adopting a double-layer board structure, and arranging feed coupling traces on the TOP layer and the BOT layer respectively and electrically connecting them through vias to form an overall trace structure, the effective length of the feed coupling trace and the coupling area with the gap area of ​​the electronic device can be effectively increased, the radiation range of the antenna can be expanded, and better antenna performance can be achieved in a limited space; through the shielding effect of the metal shielding cover, external electromagnetic interference can be effectively reduced, and the stability and reliability of the antenna signal can be improved; in addition, the antenna module has a compact structure, simple assembly, and is convenient for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 This is a layout diagram of the entire antenna device in one embodiment of the present invention;

[0027] Figure 2 It is a left side view of section a of the entire antenna device in one embodiment of the present invention;

[0028] Figure 3 An exploded view of an antenna device in one embodiment of the present invention;

[0029] Figure 4 A detailed diagram of the PCB design of an antenna device in one embodiment of the present invention;

[0030] Figure 5 A detailed diagram of the PCB design of an antenna device in another embodiment of the present invention;

[0031] Figure 6 A standing wave diagram of an antenna device in a complete environment according to an embodiment of the present invention;

[0032] Figure 7 An efficiency diagram of an antenna device in a complete machine environment according to an embodiment of the present invention;

[0033] Figure 8 The isolation degree of the antenna device in a complete machine environment in one embodiment of the present invention;

[0034] Among them, 1-first rotating shaft; 2-second rotating shaft; 3-third conductive medium; 4-first conductive medium; 5-second conductive medium; 6-gap area; 100-antenna module; 101-metal shielding cover; 1011-first metal retaining wall; 1012-second metal retaining wall; 1013-third metal retaining wall; 1014-shielding cover top cover; 1015-support; 102-circuit board; 1021-first shielding cover welding layer; 1022-second shielding cover welding layer; 1023-third shielding cover welding layer; 1024-BOT layer; 1025-feed coupling trace; 1026-matching position; 1027-clearance area; A-first shell; C-first metal back shell; D-second metal back shell. DETAILED DESCRIPTION

[0035] The present invention will be described in more detail below in conjunction with the schematic diagram, wherein the preferred embodiment of the present invention is shown, and it should be understood that those skilled in the art can modify the present invention described herein, and still achieve the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art, and not as a limitation of the present invention.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in illustrating the purpose of the embodiments of the present invention.

[0038] Embodiment 1

[0039] Please refer to Figure 1 and Figure 2 In this embodiment, an antenna module 100 is provided, including:

[0040] Metal shielding cover 101;

[0041] The circuit board 102 is connected with the metal shielding cover 101 to form a cavity structure with an open side;

[0042] Among them, the circuit board 102 is a double-layer board structure, including a TOP layer and a BOT layer 1024, and the TOP layer and the BOT layer 1024 are both provided with a feed coupling trace 1025, and the feed coupling trace 1025 of the TOP layer and the feed coupling trace 1025 of the BOT layer 1024 are electrically connected through vias to form an overall trace structure.

[0043] Wherein, the metal shielding cover 101 has an open side. Specifically, the circuit board 102 is connected to the open side of the metal shielding cover 101, and together form a cavity structure with an internal cavity. As shown in the figure, the circuit board 102 adopts a double-layer board structure, including an upper layer (TOP layer) and a lower layer (BOT layer 1024). Wherein, the TOP layer and the BOT layer 1024 are both provided with coupling traces for antenna feeding. More specifically, the feeding coupling trace 1025 of the TOP layer is electrically connected to the feeding coupling trace 1025 of the BOT layer 1024 through a via provided in the circuit board 102, thereby forming an integrated trace structure, which effectively improves the feeding effect of the antenna module 100.

[0044] The cavity structure formed by the metal shielding cover 101 and the circuit board 102 , combined with the electrical connection of the upper and lower wirings of the double-layer board, can effectively improve the performance indicators of the antenna module 100 .

[0045] Optionally, the feed point coupling routing in the antenna module 100 may also be changed to Figure 5 The form shown in .

[0046] Please refer to Figure 1 and Figure 2 Furthermore, the TOP layer includes a clearance area 1027 and a non-clearance area connected to one side of the clearance area 1027, the BOT layer 1024 is arranged in the non-clearance area, and the projection of the metal shielding cover 101 covers the TOP layer and the BOT layer 1024.

[0047] The TOP layer of the circuit board 102 is further divided into a clearance area 1027 and a non-clearance area, and the non-clearance area is connected to one side of the clearance area 1027. Specifically, the BOT layer 1024 is arranged in the non-clearance area of ​​the TOP layer, that is, the setting position of the BOT layer 1024 corresponds to the position of the non-clearance area of ​​the TOP layer. More specifically, when the metal shielding cover 101 is projected from the top, its projection area completely covers the TOP layer and the BOT layer 1024 of the circuit board 102, ensuring that a comprehensive shielding effect is provided to the antenna module 100.

[0048] Meanwhile, in order to connect with the metal shielding cover 101 , the TOP layer is provided with welding layers matching the metal shielding cover 101 , including a first shielding cover welding layer 1021 , a second shielding cover welding layer 1022 and a third shielding cover welding layer 1023 .

[0049] Optionally, the length of the third shielding cover welding layer 1023 in the antenna module 100 near the clearance area 1027 is also appropriately shortened to increase the 5G cavity return path to adjust its frequency deviation.

[0050] By dividing the TOP layer into a clearance area 1027 and a non-clearance area and arranging the BOT layer 1024 in the non-clearance area, signal interference between the TOP layer and the BOT layer 1024 can be effectively avoided. At the same time, the complete coverage of the metal shielding cover 101 further improves the shielding performance of the antenna module 100.

[0051] Furthermore, the TOP layer also includes an RF antenna feed tuning region, and the RF antenna feed tuning region connects the feed coupling trace 1025 to the RF end.

[0052] Specifically, the RF antenna feed tuning area serves as a connecting bridge to electrically connect the feed coupling trace 1025 on the TOP layer to the RF end. Through the setting of the RF antenna feed tuning area, good transmission and impedance matching of the antenna feed signal can be achieved. The setting of the RF antenna feed tuning area enables the feed coupling trace 1025 to form a stable and reliable electrical connection with the RF end, effectively ensuring the RF performance of the antenna module 100. Such a design not only improves the feeding efficiency of the antenna module 100, but also optimizes the working performance of the antenna by adjusting the parameters of the tuning area.

[0053] Furthermore, the RF antenna feed tuning region is provided with a matching position 1026 for setting inductance and capacitance components to optimize the overall resonant impedance. Specifically, the matching position 1026 is used to install impedance matching components such as inductance components and capacitance components, and the overall resonant impedance of the antenna module 100 can be optimized and adjusted by setting these components.

[0054] More specifically, by setting appropriate inductance and capacitance components on the matching position 1026, the impedance characteristics of the antenna module 100 can be adjusted according to actual application requirements, thereby achieving the best impedance matching effect. Such a design not only improves the flexibility of the antenna module 100, but also effectively improves the working performance of the antenna, making it better adapted to different application scenarios. Through the above technical solution, the impedance characteristics of the antenna module 100 can be accurately adjusted, and the overall performance of the antenna module 100 can be further optimized.

[0055] Furthermore, the metal shielding cover 101 includes:

[0056] Shielding cover top cover 1014;

[0057] Metal retaining walls are respectively arranged around the sides of the top cover of the shielding case;

[0058] The support member 1015 is disposed on a side of the top cover of the shielding cover that is not surrounded by the metal retaining wall.

[0059] Specifically, the metal retaining wall is arranged around the side of the top cover of the shielding cover to form an effective shielding of electromagnetic waves. It is worth noting that the metal retaining wall does not completely surround all sides of the top cover of the shielding cover, and a support 1015 is arranged on one side of the top cover of the shielding cover where the metal retaining wall is not arranged. The metal retaining wall includes a first metal retaining wall 1011, a second metal retaining wall 1012 and a third metal retaining wall 1013, which are welded and connected to the feed line 102-5 in the PCB small board 102 through the support 1015. The first metal retaining wall 1011, the second metal retaining wall 1012 and the third metal retaining wall 1013 arranged on the other three sides form a semi-enclosed shielding cover with the top cover 1014 of the shielding cover, and the metal shielding cover 101 is connected to the feed line of the circuit board 102 through the support 1015 to form a cavity structure and generate 5G frequency band resonance.

[0060] The TOP layer is located below the metal shielding cover 101, and mainly includes the feed coupling trace 1025 and the RF antenna feed tuning area of ​​the clearance area 1027; the non-clearance area includes the first metal retaining wall 1011, the second metal retaining wall 1012 and the third metal retaining wall 1013. The feed coupling trace 1025 is distributed in the TOP layer and the BOT layer 1024, and is formed into a whole through vias. Its trace length is about 1 / 4λ wavelength of the 2.4G frequency band, and its main function is to generate 2.4G resonance and 7G frequency multiplication. The first metal retaining wall 1011, the second metal retaining wall 1012 and the third metal retaining wall 1013 connect the TOP and BOT layers 1024 through perforations, and form a whole with the shielding cover top cover 1014. The RF antenna feed tuning area of ​​the TOP layer connects the feed coupling trace 1025 to the RF end.

[0061] Optionally, the support member 1015 can be moved appropriately to adjust the impedance and frequency deviation of 2.4G and double frequency 7G radiated by the feed coupling trace 1025 .

[0062] The surrounding arrangement of the metal retaining wall can effectively improve the shielding effect of the antenna module 100, and the support member 1015 is arranged at a specific side, which not only ensures the structural strength of the metal shielding cover 101, but also meets the assembly requirements of the antenna module 100. This structural design fully considers the balance between the shielding effect and the structural stability.

[0063] Furthermore, the length of the feed coupling line 1025 is 1 / 4 wavelength of the 2.4G frequency band.

[0064] Furthermore, the length and width of the metal shielding cover 101 are 1 / 2 wavelength of the 5G frequency band.

[0065] Specifically, the length of the feed coupling trace 1025 is designed to be one quarter wavelength (1 / 4λ) of the 2.4G frequency band. This design enables the antenna module 100 to obtain a good feeding effect in the 2.4G frequency band. Furthermore, the size of the metal shielding cover 101 is also designed based on the operating frequency. Specifically, the length and width of the metal shielding cover 101 are both designed to be one half wavelength (1 / 2λ) of the 5G frequency band. Through this size design, the antenna module 100 can obtain an ideal shielding effect in the 5G frequency band.

[0066] By making the length of the feed coupling trace 1025 and the size of the metal shielding cover 101 correspond to the wavelengths of the 2.4G band and the 5G band respectively, an antenna module 100 structure that can work in dual bands simultaneously is formed, effectively improving the multi-band working performance of the antenna module 100.

[0067] Embodiment 2

[0068] Please refer to Figure 3 and Figure 4 In this embodiment, an electronic device is provided, which adopts the antenna module 100 as described in the first embodiment, and further includes:

[0069] The metal shell comprises a first shell A and a second shell connected by a rotating shaft to form a gap area 6, wherein the second shell comprises a first metal back shell C and a second metal back shell D arranged opposite to each other, and the antenna module 100 is arranged in the second shell with its opening side facing the gap area 6;

[0070] A first conductive medium 4, connecting the antenna module 100 and the first housing A;

[0071] The second conductive medium 5 connects the antenna module 100 and the second shell.

[0072] Furthermore, the total length of the slot area 6 is twice the wavelength of the 2.4G frequency band, and the end of the feed coupling trace 1025 of the antenna module 100 is 1 / 2 wavelength away from the rotating shaft of the 2.4G frequency band.

[0073] In this embodiment, the opening side of the antenna module 100 faces the gap area 6 of the electronic device, and the antenna module 100 is connected to the first metal back shell C and the second metal back shell D of the device through the first conductive medium 4 and the second conductive medium 5 (including but not limited to metal materials such as conductive cotton elastic feet). The rotating shaft includes a first rotating shaft 1 and a second rotating shaft 2.

[0074] The total length of the slot area 6 is about 2λ wavelengths of the 2.4G frequency band, and the antenna module 100100 is 1 / 2λ wavelength away from the first rotating shaft 1 and the second rotating shaft 22.4G frequency band (where the radiation end of the coupling trace 105 is close to 1 or 2 1 / 2λ wavelength of the 2.4G frequency band, this position is the maximum current of the coupling feed point, and the coupling excitation slot area 6). Through the coupling feeding, an additional 4 2.4G resonances and multiple 7G coupling resonances will be generated in the slot area 6 of the electronic device (due to the AC characteristics that will show periodic changes in voltage or current, resonance can be generated at the maximum voltage position of the coupling field between the first rotating shaft 1 and the second rotating shaft 2).

[0075] The design size of the slot area 6 in the electronic device corresponds to the operating frequency. Specifically, the total length of the slot area 6 is designed to be two wavelengths (2λ) of the 2.4G frequency band, and this design enables the slot area 6 to fully exert the antenna radiation effect. More specifically, the distance from the end of the feed coupling trace 1025 of the antenna module 100 to the rotating shaft is designed to be half the wavelength (1 / 2λ) of the 2.4G frequency band. Through this position design, the antenna module 100 can obtain the best radiation effect.

[0076] With this design, the total length of the slot area 6 and the distance from the end of the feed coupling line 1025 of the antenna module 100 to the rotating shaft can be precisely designed to fully utilize the antenna radiation characteristics of the slot area 6 and further optimize the working performance of the electronic device in the 2.4G frequency band. This structural design effectively improves the antenna radiation efficiency of the electronic device.

[0077] Optionally, the antenna module 100 may also be placed near the first rotation axis 1 and the second rotation axis 2 near the gap area 6 .

[0078] Furthermore, it also includes a third conductive medium 3, which is arranged in the gap area 6 and is 1 times the wavelength of the 2.4G frequency band of the rotating shaft, and is used to connect the first shell A and the second shell.

[0079] The third conductive medium 3 is arranged in the gap area 6 between the first shell A and the second shell, and its key position is 1 times the wavelength of the 2.4G frequency band from the shaft (about 125mm), and the electrical connection between the first shell A and the second shell is realized through this position. The position setting at 1 times the wavelength of the 2.4G frequency band can minimize signal reflection and interference, which is conducive to forming a stable electromagnetic field distribution, improving signal transmission efficiency, reducing signal loss, and improving communication quality. In order to ensure the isolation of the MIMO antenna, the third conductive medium 3 can be added to connect the first shell A and the second shell at a distance of 2.4G1 times from the first rotating shaft 1 and the second rotating shaft 2 in the gap area 6 (this area is the maximum coupling field current in the gap area 6), actively increase the return path, and reduce the coupling between the two.

[0080] Furthermore, the first conductive medium 4 and the second conductive medium 5 are conductive cotton or elastic feet.

[0081] Specifically, the conductive cotton has good elasticity and compressibility, stable conductivity, can adapt to different pressure conditions, is simple to install, easy to fix, and has a relatively low cost. The elastic foot has excellent elastic recovery ability, controllable contact pressure, good fatigue resistance, long service life, and high reliability. The selection of these two materials can adapt to the position changes during the opening and closing of the shell, ensure stable electrical contact, and compensate for manufacturing and assembly errors.

[0082] With the above settings, please refer to Figure 6-Figure 8 , Figure 6 and Figure 7 The S11 and total efficiency of the electronic device after the antenna module 100 is adapted. It can be seen from the figure that the efficiency of 2.4G&5G&6G is greater than -4db. Figure 8 In order to increase the isolation after decoupling of the third conductive medium 3 in the MIMO scenario of the electronic device, it can be seen from the figure that the isolation is above -20dB, with better communication quality, ensuring the stability and reliability of the system RF signal.

[0083] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. An antenna module, characterized in that: include: Metal shielding cover; A circuit board connected to the metal shielding cover to form a cavity structure with an open side; The circuit board is a double-layer board structure, including a TOP layer and a BOT layer. Both the TOP layer and the BOT layer are provided with feed coupling traces. The feed coupling traces of the TOP layer and the feed coupling traces of the BOT layer are electrically connected through vias to form an overall trace structure.

2. The antenna module according to claim 1, characterized in that: The TOP layer includes a clearance area and a non-clearance area connected to one side of the clearance area, the BOT layer is arranged in the non-clearance area, and the projection of the metal shielding cover covers the TOP layer and the BOT layer.

3. The antenna module according to claim 1, wherein: The TOP layer also includes a radio frequency antenna feed tuning region, and the radio frequency antenna feed tuning region connects the feed coupling trace to the radio frequency end.

4. The antenna module according to claim 3, characterized in that: The radio frequency antenna feed tuning region is provided with a matching position for setting inductance and capacitance components to optimize the overall resonant impedance.

5. The antenna module according to claim 1, wherein: The metal shielding cover comprises: Shield cover top cover; Metal retaining walls are respectively arranged around the sides of the top cover of the shielding case; The support member is arranged on a side of the top cover of the shielding cover which is not surrounded by the metal retaining wall.

6. The antenna module according to claim 1, characterized in that: The length of the feed coupling line is 1 / 4 wavelength in the 2.4G frequency band.

7. The antenna module according to claim 1, characterized in that: The length and width of the metal shielding cover are 1 / 2 wavelength of the 5G frequency band.

8. An electronic device, characterized in that: The antenna module according to any one of claims 1 to 7 further comprises: The metal shell comprises a first shell and a second shell connected by a rotating shaft to form a gap area, wherein the second shell comprises a first metal back shell and a second metal back shell arranged opposite to each other, and the antenna module is arranged in the second shell with its opening side facing the gap area; A first conductive medium, connecting the antenna module and the first shell; The second conductive medium connects the antenna module and the second shell.

9. The electronic device according to claim 8, characterized in that: The total length of the slot area is twice the wavelength of the 2.4G frequency band, and the end of the feed coupling line of the antenna module is 1 / 2 wavelength away from the rotating shaft of the 2.4G frequency band.

10. The electronic device according to claim 8, characterized in that: It also includes a third conductive medium, which is arranged in the gap area and at a distance of 1 times the wavelength of the 2.4G frequency band from the rotating shaft, and is used to connect the first shell and the second shell.

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