Slot antenna structure and intelligent terminal

Abstract

The utility model discloses a slot antenna structure and an intelligent terminal, and relates to the technical field of electronic equipment, and the slot antenna structure comprises a screen support, a back cover, a signal feeding point, a first ground point and a second ground point. The screen support and the back cover are both made of metal materials. The back cover is provided with a boss for avoiding the camera module; a gap resonant cavity is formed between the boss and the screen bracket; the signal feeding point is in contact with the back cover and is used for injecting a radio frequency signal into the slot resonant cavity; the first ground point and the second ground point are used for forming a current loop of the gap resonant cavity. The design of the slot resonant cavity is beneficial for improving the antenna gain, reducing the size, ensuring smooth transmission of wireless signals, realizing the narrow-frame zero-clearance design and enhancing the visual attraction. In addition, the resonant cavity is constructed by using the existing structure, extra space is not needed, the resonant cavity is complementary with a narrow frame design, the area of a mainboard is prevented from being occupied, and more internal space allowance is reserved.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a slot antenna structure and a smart terminal. Background Technology

[0002] In today's consumer electronics market, consumers have increasingly higher demands for smartphones, especially in terms of screen size, design, battery life, and audio quality. To meet these demands, high-end smartphone brands are increasingly adopting all-metal back cover designs to provide a more elegant and durable appearance. However, traditional all-metal back cover designs face technical challenges in implementing wireless communication functions, particularly the transmission of 2.4G Wi-Fi signals.

[0003] Previously, most all-metal back-cover smart terminals used shielded cavity antennas. However, this design requires a minimum 4mm clearance at the screen edge to ensure proper wireless signal transmission. This design not only limits the screen bezel width (e.g., ... Figure 5 As shown, the width of the black border of a traditional screen is about 5mm (31), and it requires more than 1000 square millimeters of area on the motherboard. Such space occupation puts pressure on battery capacity and sound cavity design, making it difficult to achieve a narrow bezel screen, high sound quality and long battery life while maintaining an all-metal back cover.

[0004] Therefore, with the intensification of market competition, there is an urgent need for a new technological solution to resolve the contradiction between the all-metal back cover design and wireless communication functions, and to meet consumers' comprehensive needs for high-end smartphones. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a slot antenna structure and a smart terminal to solve the technical problem that existing shielded cavity antenna forms make it difficult to achieve a narrow bezel screen, high sound quality and long battery life while maintaining an all-metal back cover.

[0006] To achieve the above technical objectives, this application provides a slot antenna structure, including a screen bracket, a back cover, a signal feed point, a first loop point, and a second loop point;

[0007] Both the screen bracket and the back cover are made of metal.

[0008] The back cover is provided with a protrusion to avoid the camera module;

[0009] A gap resonant cavity is formed between the protrusion and the screen bracket;

[0010] The signal feed point is in contact with the back cover and is used to inject radio frequency signals into the slot resonant cavity;

[0011] The first and second return points are used to form the current loop of the slot resonant cavity.

[0012] Furthermore, the first return point and the second return point are located on both sides of the signal feed point.

[0013] Furthermore, the first return point and the second return point are respectively located on the left and right sides of the signal feed point in the horizontal direction, and / or on the upper and lower sides of the signal feed point in the vertical direction.

[0014] Furthermore, the screen bracket is a steel sheet for the screen.

[0015] This application also discloses a smart terminal, including the terminal body and the aforementioned slot antenna structure.

[0016] Furthermore, the terminal body includes a mid-frame, a screen module, and an internal component module;

[0017] The screen bracket of the slot antenna structure is fixed to the front of the middle frame;

[0018] The back cover of the slot antenna structure is fixed to the back of the middle frame;

[0019] The screen module is fixed to the front of the middle frame and connected to the screen bracket;

[0020] The screen bracket is used to support the screen module;

[0021] The internal component module is fixed inside the middle frame;

[0022] The signal feed point, first return point, and second return point of the slot antenna structure are located on the main board of the internal component module.

[0023] As can be seen from the above technical solutions, the slot antenna structure designed in this application has the following beneficial effects:

[0024] 1. The resonant cavity formed by the gap between the protrusion on the back cover and the screen bracket helps to improve antenna gain, reduce antenna size, ensure smooth transmission of wireless signals, and achieve a zero-clearance design at the screen edge (the improved screen black border can be reduced to about 1mm), achieving a narrow bezel zero-clearance effect and significantly enhancing the visual appeal of the product.

[0025] 2. By utilizing the existing structure to construct the slot resonant cavity, no additional space is required, which complements the narrow bezel design and avoids encroaching on the motherboard area, thus leaving more internal space. This allows for an increase in battery capacity, thereby improving battery life, while also expanding the sound cavity area to enhance sound quality, further optimizing the user experience. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a partial structural schematic diagram of a slot antenna structure provided in this application;

[0028] Figure 2 The efficiency curve of a simulated slot antenna structure provided in this application is shown.

[0029] Figure 3 A Smith chart of a simulated slot antenna structure provided in this application;

[0030] Figure 4 This is a schematic diagram of a partial black border structure of a screen under a slot antenna structure based on this application;

[0031] Figure 5 This is a schematic diagram of a portion of the black border structure of a screen in the form of a traditional shielded cavity antenna.

[0032] In the diagram: 1. Back cover; 11. Boss; 2. Screen module; 3. Screen border; 31. Traditional screen border; 4. Motherboard; 41. First location point; 42. Second location point; 43. Signal feed point. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0034] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0036] This application discloses a slot antenna structure.

[0037] Please see Figure 1 / Figure 4 One embodiment of a slot antenna structure provided in this application includes:

[0038] Screen bracket (not shown in the figure), back cover 1, signal feed point 43, first return point 41 and second return point 42.

[0039] Both the screen bracket and the back cover 1 are made of metal. The back cover 1 is provided with a protrusion 11 to avoid the camera module. A gap resonant cavity is formed between the protrusion 11 and the screen bracket.

[0040] The signal feed point 43 contacts the back cover 1 and is used to inject radio frequency signals into the slot resonant cavity; the first return point 41 and the second return point 42 are used to form the current loop of the slot resonant cavity.

[0041] The slot antenna structure designed in this application has the following beneficial effects:

[0042] 1. The cleverly designed slot resonant cavity formed between the protrusion 11 on the back cover 1 and the screen bracket not only significantly improves the antenna gain performance but also effectively reduces the overall size of the antenna. This design ensures smooth wireless signal transmission while achieving a zero-clearance design at the screen edge. The improved screen bezel 3 width can be reduced from the original 5mm to approximately 0.8mm, achieving a perfect combination of narrow bezels and zero clearance, greatly enhancing the product's visual appeal and providing users with a more immersive visual experience.

[0043] 2. The cleverly constructed slotted resonant cavity, built upon the existing structure, requires no additional valuable space and complements the narrow bezel design perfectly. This design avoids occupying the motherboard area, thus freeing up more internal space and allowing for a significant increase in battery capacity, thereby greatly improving the device's battery life. Simultaneously, it expands the sound cavity area, further enhancing sound quality and providing users with a richer and higher-quality audio experience.

[0044] Overall, the design of the slot antenna structure in this application can ultimately optimize the user experience of the product, enabling users to enjoy longer usage time and a better multimedia experience (better battery life and sound quality performance).

[0045] The above is Embodiment 1 of a slot antenna structure provided in this application. The following is Embodiment 2 of a slot antenna structure provided in this application. Please refer to the following for details. Figures 1 to 3 .

[0046] Based on the solution of Embodiment 1 above:

[0047] Furthermore, the first return point 41 and the second return point 42 are located on both sides of the signal feed point 43. By setting the first return point 41 and the second return point 42 on both sides of the signal feed point 43, it helps to improve the peak antenna efficiency, widen the bandwidth, enhance stability, and optimize anti-interference and tolerance capabilities.

[0048] Furthermore, the first return point 41 and the second return point 42 are respectively located on the left and right sides of the signal feed point 43 in the horizontal direction, and / or on the upper and lower sides of the signal feed point 43 in the vertical direction; it can be understood that the two return points can be distributed horizontally relative to the signal feed point 43 and collinear in the horizontal direction; or the two return points can be distributed vertically relative to the signal feed point 43 and collinear in the vertical direction; or the two return points can be distributed horizontally relative to the signal feed point 43 and simultaneously distributed vertically relative to the signal feed point 43.

[0049] To verify the effectiveness of the slot resonator design proposed in this application, the efficiency of the 2.4G antenna was simulated using ADS software (a professional electronic design automation (EDA) software developed by Keysight Technologies). Figure 2 (as shown)

[0050] 1. Simulations show that the highest efficiency of a 2.4G antenna can reach -3.5dB (e.g., Figure 2 (The efficiency value corresponding to point 1 of the intermediate simulation line shown).

[0051] 2. By changing the position of point 41 in the first cycle or point 42 in the second cycle (e.g., shifting point 41 to the left or point 42 to the bottom), the cavity area increases. This causes the resonant frequency to shift towards lower frequencies (the analog line shifts to the left), and the simulated antenna efficiency can reach up to -4.0 dB (e.g., ...). Figure 2 The efficiency value corresponding to point 3 on the left-hand analog line is shown.

[0052] 3. Changing the position of point 41 in the first cycle or point 42 in the second cycle (e.g., moving point 41 to the right or moving point 42 upwards in the second cycle) reduces the cavity area. This causes the resonant frequency to shift towards higher frequencies (the analog line shifts to the right), and the simulated antenna efficiency is -3.5 dB (e.g., ...). Figure 2 The efficiency value corresponding to point 2 on the right-hand analog line shown.

[0053] Furthermore, from Figure 3 As can be seen from the Smith chart, Figure 2 The intermediate simulation line (optimal efficiency at point 1) corresponds to Figure 3 The curve is close to the center region (good matching), indicating that after adjusting the impedance matching, the reflection loss is reduced (the Smith chart trajectory approaches the center), and the radiation efficiency is significantly improved. Figure 2 The intermediate curve (the curve of the curve) verifies the success / effectiveness of the optimized slot antenna structure of this application.

[0054] The simulation experiments described above show that by forming a slot resonant cavity between the protrusion 1111 and the screen bracket, this application can effectively adjust the frequency offset without taking up additional space, and the efficiency will not decrease significantly. This satisfies the efficiency requirements, reduces the space occupied by the antenna, and improves battery life and sound quality, thus verifying the effectiveness of the design in this application.

[0055] Furthermore, the screen bracket is a steel sheet; that is, the screen bracket is a steel sheet structure that comes with the screen module 2, requiring no additional design. This design not only simplifies the production process and reduces manufacturing costs, but also ensures a tight connection between the screen bracket and the screen module 2, further improving the product's stability and durability.

[0056] This application also discloses a smart terminal, including the terminal body and the slot antenna structure designed above.

[0057] Furthermore, the terminal body includes a mid-frame, a screen module 2, and an internal component module.

[0058] The screen bracket with the slot antenna structure is fixed to the front of the mid-frame, and the back cover 1 of the slot antenna structure is fixed to the back of the mid-frame.

[0059] The screen module 2 is fixed to the front of the mid-frame and includes a display screen, a touch layer, etc. The screen module 2 is connected to the screen bracket and is supported and fixed by the screen bracket.

[0060] The internal component modules are fixed inside the middle frame, including but not limited to the motherboard 4, battery, antenna structure, etc.

[0061] The signal feed point 43, the first return point 41, and the second return point 42 of the slot antenna structure are located on the main board 4 of the internal component module.

[0062] The smart terminal referred to in this application can be any other terminal device that requires wireless communication functions, such as mobile phone terminals and tablet terminals, and faces problems such as the inability to achieve narrow bezels / occupancy due to the back design of metal materials, without any limitation.

[0063] The above provides a detailed description of a slot antenna structure and a smart terminal provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A slot antenna structure, characterized in that, Includes screen bracket, back cover (1), signal feed point (43), first return point (41) and second return point (42); Both the screen bracket and the back cover (1) are made of metal material; The back cover (1) is provided with a protrusion (11) to avoid the camera module; A slot resonant cavity is formed between the boss (11) and the screen bracket; The signal feed point (43) is in contact with the back cover (1) and is used to inject radio frequency signals into the slot resonant cavity; The first return point (41) and the second return point (42) are used to form the current loop of the slot resonant cavity.

2. The slot antenna structure according to claim 1, characterized in that, The first return point (41) and the second return point (42) are located on both sides of the signal feed point (43).

3. The slot antenna structure according to claim 1, characterized in that, The first return point (41) and the second return point (42) are located on the left and right sides of the signal feed point (43) in the horizontal direction, and / or on the upper and lower sides of the signal feed point (43) in the vertical direction.

4. The slot antenna structure according to claim 1, characterized in that, The screen bracket is a steel sheet for the screen.

5. A smart terminal, characterized in that, It includes the terminal body and the slot antenna structure as described in any one of claims 1 to 4.

6. The smart terminal according to claim 5, characterized in that, The terminal body includes a mid-frame, a screen module (2), and an internal component module; The screen bracket of the slot antenna structure is fixed to the front of the middle frame; The back cover (1) of the slot antenna structure is fixed to the back of the middle frame; The screen module (2) is fixed to the front of the middle frame and connected to the screen bracket; The screen bracket is used to support the screen module (2); The internal component module is fixed inside the middle frame; The signal feed point (43), the first return point (41), and the second return point (42) of the slot antenna structure are located on the main board (4) of the internal component module.

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