Slot antenna structure and microcomputer

Abstract

The invention discloses a slot antenna structure and a microcomputer, and relates to the technical field of antennae, the slot antenna structure comprises a dielectric substrate, an antenna floor and a feed structure, the antenna floor is arranged at one side of the dielectric substrate, a slot structure is formed in the antenna floor, the slot structure comprises a bending slot and a coupling slot, and the bending slot is connected with the coupling slot. The bending gap and the coupling gap are arranged side by side along the width direction of the antenna floor; the feed structure is arranged on one side, back to the antenna floor, of the dielectric substrate, the feed structure comprises a back floor, a feed branch and a matching branch, the back floor is connected with the antenna floor, the feed branch is in feed connection, one end of the feed branch is in coupling connection with the antenna floor, and the other end of the feed branch is connected with the matching branch, so that impedance matching of the slot antenna structure is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and particularly to a slot antenna structure and a microcomputer. Background Art

[0002] In this intelligent era, all aspects of life are increasingly inseparable from the assistance of computers. However, desktop hosts have the problems of large volume and heavy weight. Relatively thin and light laptops are usually expensive and have limited performance. Tablet computers are more inclined to entertainment scenarios. These types of intelligent devices are not suitable for providing computing power services for people in a wider range of intelligent terminal scenarios. Against this background, microcomputers have emerged.

[0003] Since microcomputers do not need to consider the area of the screen, they are more inclined to stack components to better utilize the longitudinal space and obtain a smaller overall volume. Therefore, microcomputers have the characteristics of stacked components and interfaces, a compact structure, and a small circuit board. In addition, in order to pursue structural rigidity and overall texture, microcomputers usually hope to adopt a full-metal body design, which cannot guarantee the clearance height required for the normal radiation of common terminal antennas such as dipole antennas and PIFA antennas. To sum up, how to design an antenna under the premise of a compact space and a full-metal shell has become a major problem in the antenna design of microcomputers. Summary of the Invention

[0004] The main object of the present invention is to propose a slot antenna structure and a microcomputer, aiming to solve the problem of difficult antenna setting in a full-metal shell.

[0005] To achieve the above object, the slot antenna structure proposed by the present invention includes:

[0006] A dielectric substrate;

[0007] An antenna floor, which is arranged on one side of the dielectric substrate. The antenna floor is formed with a slot structure, and the slot structure includes a bent slot and a coupling slot. The bent slot and the coupling slot are arranged side by side along the width direction of the antenna floor;

[0008] A feeding structure, which is arranged on the side of the dielectric substrate facing away from the antenna floor. The feeding structure includes a back floor, a feeding stub, and a matching stub. The back floor is connected to the antenna floor. The feeding stub is fed and connected. One end of the feeding stub is coupled to the antenna floor, and the other end is connected to the matching stub to achieve impedance matching of the slot antenna structure.

[0009] In one embodiment, both the slot structure and the feeding structure include two groups. The two slot structures are symmetrically arranged along the length direction of the antenna floor, and one feeding structure is correspondingly matched with one slot structure.

[0010] In one embodiment, the bent slot includes a first slot, a second slot, and a connecting slot. The first slot, the second slot, and the coupling slot are arranged in sequence along the width direction of the antenna floor and are parallel to each other in pairs. The two ends of the extending direction of the connecting slot are respectively connected to the first slot and the second slot.

[0011] In one embodiment, the connecting slot is perpendicular to both the first slot and the second slot.

[0012] In one embodiment, the length of the first slot protruding from one end of the connecting slot is less than the length of the second slot protruding from the connecting slot.

[0013] In one embodiment, a short - circuit via is further formed on the antenna floor. The short - circuit via connects one end of the feeding stub away from the matching stub to the antenna floor.

[0014] In one embodiment, a plurality of metallized vias are further formed in the slot antenna structure. The metallized vias penetrate through the dielectric substrate and are connected to the antenna floor.

[0015] In one embodiment, the material of the antenna floor is copper.

[0016] The present invention also provides a microcomputer. The microcomputer includes a slot antenna structure and a housing. An installation groove is formed on the side wall of the housing, and the slot antenna structure is disposed in the installation groove.

[0017] In one embodiment, a plurality of interfaces are provided on the side wall of the housing. The interfaces are arranged at intervals along the length direction of the housing, and the slot antenna structure is located above the interfaces.

[0018] The technical solution of the present invention proposes a slot antenna structure, which includes a dielectric substrate, an antenna floor, and a feeding structure. The antenna floor is located on one side of the dielectric substrate. The slot structure thereon is composed of a bent slot and a coupling slot, and the two are arranged side by side along the width direction of the antenna floor. The feeding structure is located on the other side of the dielectric substrate and includes a back floor, a feeding branch, and a matching branch. The back floor is connected to the antenna floor. One end of the feeding branch is coupled to the antenna floor, and the other end is connected to the matching branch to achieve impedance matching. This structural design enables the slot antenna structure to effectively receive and transmit signals. At the same time, through the adjustment of the matching branch, the impedance matching between the antenna and the feeder is ensured, thereby improving the signal transmission efficiency, reducing the reflection and loss of energy, and enhancing the overall performance of the antenna. The bent design and coupling design of the slot structure enable the slot antenna structure to achieve good radiation characteristics in multiple frequency bands and enhance the multi-band working ability of the antenna. In addition, this structure can also optimize the radiation pattern of the antenna, making the signal radiation stronger in a specific direction and improving the directivity and gain of the slot antenna structure. The design of the feeding structure enables the signal to be stably transmitted to the antenna floor, further improving the stability and reliability of the slot antenna structure. It is beneficial to reduce the influence of the all-metal fuselage on the antenna and achieve the expansion of the antenna bandwidth in a limited installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 FIG. is a schematic structural diagram of an embodiment of the slot antenna structure provided by the present invention;

[0021] Figure 2 is Figure 1 a schematic structural diagram of the other side of the slot antenna structure in;

[0022] Figure 3 FIG. is a schematic structural diagram of an embodiment of a microcomputer provided by the present invention;

[0023] Figure 4 is Figure 3 a front view of the microcomputer in;

[0024] Figure 5 is Figure 3 a schematic diagram of the simulation result of the antenna port reflection coefficient of the slot antenna structure in;

[0025] Figure 6 isFigure 3 Schematic diagram of the isolation test results of the middle slot antenna structure.

[0026] Explanation of the reference numerals in the attached drawings:

[0027] 100, microcomputer; 10, slot antenna structure; 1, dielectric substrate; 2, antenna floor; 21, slot structure; 211, bent slot; 2111, first slot; 2112, second slot; 2113, connecting slot; 212, coupling slot; 3, feeding structure; 31, back floor, 32, feeding stub; 33, matching stub; 4, shorting via; 5, metallized via; 20, housing; 30, interface.

[0028] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0032] In this era of intelligence, all aspects of life are increasingly relying on the assistance of computers. However, desktop hosts have problems such as large volume and heavy weight. Relatively thin and light laptops are usually expensive and have limited performance, while tablet computers are more inclined to entertainment scenarios. These types of intelligent devices are not suitable for providing computing power services to people in a wider range of intelligent terminal scenarios. Against this background, microcomputers have emerged.

[0033] Since microcomputers do not need to consider the area of the screen, they are more inclined to stack components to better utilize the vertical space and obtain a smaller overall volume. Therefore, microcomputers have the characteristics of stacked components and interfaces, a compact structure, and a small circuit board. In addition, in order to pursue structural rigidity and overall texture, microcomputers usually hope to adopt a full-metal body design, which cannot guarantee the clearance height required for the normal radiation of common terminal antennas such as dipole antennas and PIFA antennas. To sum up, how to design an antenna under the premise of a compact space and a full-metal shell has become a major problem in the antenna design of microcomputers.

[0034] To solve the above problems, the present invention proposes a slot antenna structure 10, which includes a dielectric substrate 1, an antenna floor 2, and a feeding structure 3. The antenna floor 2 is disposed on one side of the dielectric substrate 1. The antenna floor 2 is formed with a slot structure 21. The slot structure 21 includes a bent slot 211 and a coupling slot 212. The bent slot 211 and the coupling slot 212 are arranged side by side along the width direction of the antenna floor 2. The feeding structure 3 is disposed on the side of the dielectric substrate 1 opposite to the antenna floor 2. The feeding structure 3 includes a back floor 31, a feeding branch 32, and a matching branch 33. The back floor 31 is connected to the antenna floor 2. The feeding branch 32 is fed and connected. One end of the feeding branch 32 is coupled to the antenna floor 2, and the other end is connected to the matching branch 33 to achieve impedance matching of the slot antenna structure 10.

[0035] In an optional embodiment, to further improve the working efficiency of the slot antenna structure 10, both the slot structure 21 and the feeding structure 3 include two groups. The two slot structures 21 are symmetrically arranged along the length direction of the antenna floor 2, and one feeding structure 3 is correspondingly matched with one slot structure 21. This symmetrical design helps to improve the radiation efficiency and directivity of the slot antenna structure 10, making the signal coverage more uniform in different directions. The symmetrical structural design can balance the input impedance of the antenna, further optimize the impedance matching effect, and reduce the reflection and loss in signal transmission. This design can also enhance the anti-interference ability of the antenna, enabling the antenna to work stably in a complex electromagnetic environment. In addition, the symmetrically arranged slot structure 21 and feeding structure 3 can improve the stability and reliability of the antenna, enabling the antenna to maintain good performance during long-term use. The symmetrical design can also optimize the radiation pattern of the antenna, making the signal radiation stronger in a specific direction and improving the directivity and gain of the slot antenna structure 10. Moreover, by arranging two symmetrical antenna structures on the dielectric substrate 1 as the main antenna and diversity antenna of WiFi respectively, the main antenna and the diversity antenna work together, which can effectively resist multipath fading and ensure signal quality.

[0036] In an optional embodiment, to expand the bandwidth of the slot antenna structure 10, the bent slot 211 includes a first slot 2111, a second slot 2112, and a connecting slot 2113. The first slot 2111, the second slot 2112, and the coupling slot 212 are arranged in sequence along the width direction of the antenna floor 2 and are parallel to each other in pairs. The two ends of the extending direction of the connecting slot 2113 are respectively connected to the first slot 2111 and the second slot 2112. The design of the bent structure enables the antenna to achieve good radiation characteristics in multiple frequency bands, enhances the multi-band working ability of the antenna, and can also optimize the radiation pattern of the slot antenna structure 10, making the signal radiation stronger in a specific direction and improving the directivity and gain of the slot antenna structure 10. In addition, the design of the bent slot 211 can enhance the anti-interference ability of the antenna, reduce unnecessary electromagnetic wave radiation, and improve the quality and stability of the signal. The design of the connecting slot 2113 makes the slot structure 21 more compact and stable, which is beneficial to improving the mechanical strength and reliability of the antenna. The coupling slot 212 is arranged above the first slot 2111, and a new resonance zero point is formed by the coupling slot 212 and the first slot 2111 to broaden the working bandwidth of the 5G frequency band.

[0037] In an alternative embodiment, the connecting slot 2113 is perpendicular to both the first slot 2111 and the second slot 2112. In actual design, the connecting slot 2113 may form a certain angle with the first slot 2111 and the second slot 2112. In this embodiment, by setting the connecting slot 2113 perpendicular to both the first slot 2111 and the second slot 2112, the slot structure 21 can be made more compact and stable, which is beneficial to improving the reliability of the antenna. The vertically connected slot structure 21 can optimize the current distribution of the antenna, making the current flow more smoothly in the slots, thereby improving the radiation efficiency and performance of the antenna. This design can also reduce the size of the antenna, making the antenna more miniaturized and facilitating installation and use in a limited space. In addition, the vertically connected slot structure 21 can enhance the anti-interference ability of the antenna, reduce unwanted electromagnetic wave radiation, and improve the quality and stability of the signal. This enables the antenna to achieve good radiation characteristics in multiple frequency bands and enhances the multi-band operating ability of the antenna.

[0038] In an alternative embodiment, the length by which the first slot 2111 protrudes from one end of the connecting slot 2113 is less than the length by which the second slot 2112 protrudes from the connecting slot 2113. This design can adjust the coupling strength and radiation characteristics of the slots, making the performance of the antenna more optimized in different frequency bands. By reasonably setting the protruding lengths of the first slot 2111 and the second slot 2112, fine adjustment of the resonant frequency and bandwidth of the antenna can be achieved, improving the multi-band operating ability of the antenna. The length of the overlapping part of the two slots determines the coupling strength between them. Adjusting the length of the overlap can cause a suitable coupling between the operating modes of the first slot 2111 and the coupling slot 212, resulting in a broadband effect in the 5G frequency band. In addition, this structure can also enhance the anti-interference ability of the antenna, reduce unwanted electromagnetic wave radiation, improve the quality and stability of the signal, and is beneficial to optimizing the radiation pattern of the antenna, making the signal radiation of the antenna stronger in a specific direction, improving the directivity and gain of the antenna, and enhancing the multi-band operating ability of the antenna.

[0039] In an alternative embodiment, the antenna floor 2 is further formed with shorting vias 4, and the shorting vias 4 connect the end of the feeding stub 32 far from the matching stub 33 to the antenna floor 2. The setting of the shorting vias 4 can effectively suppress the surface waves on the antenna floor 2, reduce energy loss and leakage, and improve the radiation efficiency of the antenna. The shorting vias 4 can also optimize the input impedance of the antenna, further improve the impedance matching effect, and improve the stability and reliability of the antenna. This design can also enhance the anti-interference ability of the antenna, reduce unwanted electromagnetic wave radiation, improve the quality and stability of the signal. It is beneficial to enable the antenna to achieve good radiation characteristics in multiple frequency bands and enhance the multi-band operating ability of the antenna.

[0040] In an alternative embodiment, the slot antenna structure 10 is further formed with a plurality of metallized vias 5. The metallized vias 5 penetrate through the dielectric substrate 1 and are connected to the antenna floor 2. The arrangement of the metallized vias 5 can enhance the structural stability and electrical performance of the antenna floor 2, making the connection between the antenna floor 2 and the dielectric substrate 1 more firm and reliable. The metallized vias 5 can also serve as signal transmission channels, improving the signal transmission efficiency and quality. It can also optimize the radiation characteristics of the antenna, improve the directivity and gain of the antenna, and enhance the anti-interference ability of the antenna. During the actual manufacturing process, a conductive metal layer can be electroplated on the inner walls of the respective metallized vias 5 to achieve good electrical connection between the antenna floor 2 and the back floor 31.

[0041] In an alternative embodiment, the material of the antenna floor 2 is copper. Copper has excellent electrical conductivity and thermal conductivity, which can effectively conduct current and dissipate heat, improving the performance and reliability of the antenna. The copper material also has good corrosion resistance and mechanical strength, enabling the antenna floor 2 to maintain good performance during long-term use. In addition, the selection of the copper material can reduce the cost of the antenna, improve its cost performance, and make it more suitable for mass production and application. The excellent performance of the copper material can optimize the radiation characteristics of the antenna, improve the directivity and gain of the antenna, and enhance the anti-interference ability of the antenna.

[0042] The following describes a specific embodiment of the slot antenna structure 10 in this solution:

[0043] Figure 1 FIG. 10 is a schematic diagram of the slot antenna structure 10 antenna proposed in this design. The antenna structure includes a coupling slot 212, a bent slot 211, and an antenna floor 2. The feeding structure 3 includes a feeding stub 32, a matching stub 33, and a back floor 31. The all-metal housing 20 is formed with a mounting groove and related interfaces 30. The mounting groove is used to mount the slot antenna structure 10, and the interfaces 30 are used to realize the circuit connection of the microcomputer 100. In this embodiment, two slot antennas with the same size and symmetrically arranged are designed on the same dielectric substrate 1, serving as the WiFi main antenna and the diversity antenna of the microcomputer 100 respectively. The bent slot 211 has the effect of reducing the overall size of the antenna, and can achieve dual-band coverage of the 2.4G band and the 5G band under the premise of a short length. The coupling slot 212 is located above the end of the first slot 2111. At the 5G band, the first slot 2111 has a relatively large current intensity here. Adding the coupling slot 212 here helps to introduce new resonance zeros and achieve a broadband effect. The end of the feeding stub 32 has a shorting via 4, and the shorting via 4 connects the feeding stub 32 and the antenna floor 2. In addition, an open-circuit matching stub 33 is connected to the end of the feeding stub 32 away from the shorting via 4. This stub can introduce an inductive component to achieve 50Ω impedance matching, which helps to optimize the performance of the slot antenna structure 10.

[0044] Figure 5 Shown is the simulation result of the reflection coefficient of the antenna port in this embodiment. The -10dB impedance bandwidths of the two frequency bands of the antenna are 2.40 - 2.51GHz and 5.05 - 6.35GHz respectively, which can completely cover the 2.4GHz and 5GHz frequency bands of WiFi. Figure 6 Shown is the isolation between the two antenna ports of the main antenna and the diversity antenna on the left and right sides. Even when the main antenna and the diversity antenna are close to each other, the isolation within the operating frequency band is still better than -12dB.

[0045] The present invention also proposes a microcomputer 100, which includes a slot antenna structure 10 and a housing 20. An installation groove is formed on the side wall of the housing 20, and the slot antenna structure 10 is disposed in the installation groove. The specific structure of the slot antenna structure 10 refers to the above embodiment. Since the microcomputer 100 adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Specifically, the slot antenna structure 10 can be tightly integrated into the housing 20 of the microcomputer 100, saving space and improving the compactness and portability of the microcomputer 100. The setting of the installation groove can also protect the antenna structure and prevent it from being damaged during use. In addition, this integrated design helps to optimize the electromagnetic compatibility of the microcomputer 100, reduce the leakage and interference of electromagnetic waves, and improve the performance and reliability of the microcomputer 100. The integration of the slot antenna structure 10 enables the microcomputer 100 to have better performance in wireless communication, and can achieve more stable signal transmission and higher data transmission rate. In addition, this design can also improve the aesthetics and overall design sense of the microcomputer 100, making it more in line with the needs and aesthetic standards of users.

[0046] In an optional embodiment, a plurality of interfaces 30 are provided on the side wall of the housing 20, and the interfaces 30 are arranged at intervals along the length direction of the housing 20. The slot antenna structure 10 is located above the interfaces 30. This design makes the layout of the interfaces 30 of the microcomputer 100 more reasonable and convenient, and users can more easily connect and use various external devices. Setting the slot antenna structure 10 above the interfaces 30 can avoid the interference of the interfaces 30 on the antenna radiation and ensure that the performance of the antenna is not affected. In addition, this layout helps to improve the aesthetics and overall design sense of the microcomputer 100, making it more in line with the needs and aesthetic standards of users. The reasonable layout of the interfaces 30 can improve the usability of the microcomputer 100, making it more convenient and fast for users to connect external devices. In addition, this design can also optimize the electromagnetic compatibility of the microcomputer 100, reduce the leakage and interference of electromagnetic waves, and improve the performance and reliability of the microcomputer 100.

[0047] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A slot antenna structure, characterized in that: include: dielectric substrate; An antenna floor, the antenna floor is arranged on one side of the dielectric substrate, the antenna floor is formed with a slot structure, the slot structure includes a bending slot and a coupling slot, the bending slot and the coupling slot are arranged side by side along the width direction of the antenna floor; A feeding structure, wherein the feeding structure is arranged on the side of the dielectric substrate facing away from the antenna floor, and the feeding structure includes a back floor, a feeding branch and a matching branch. The back floor is connected to the antenna floor, and the feeding branch is fed and connected. One end of the feeding branch is coupled to the antenna floor, and the other end is connected to the matching branch to achieve impedance matching of the slot antenna structure.

2. The slot antenna structure according to claim 1, characterized in that: The slot structure and the feeding structure each include two groups, the two slot structures are symmetrically arranged along the length direction of the antenna floor, and one feeding structure is matched with one slot structure.

3. The slot antenna structure according to claim 2, characterized in that: The bending gap includes a first gap, a second gap and a connecting gap. The first gap, the second gap and the coupling gap are arranged in sequence along the width direction of the antenna floor and are parallel to each other. The two ends of the connecting gap in the extension direction are respectively connected to the first gap and the second gap.

4. The slot antenna structure according to claim 3, characterized in that: The connecting gap is perpendicular to the first gap and the second gap.

5. The slot antenna structure according to claim 3, characterized in that: The length of the first gap protruding from one end of the connecting gap is smaller than the length of the second gap protruding from the connecting gap.

6. The slot antenna structure according to any one of claims 1 to 5, characterized in that: The antenna floor is also formed with a short-circuit via hole, and the short-circuit via hole connects one end of the feeding branch away from the matching branch and the antenna floor.

7. The slot antenna structure according to claim 6, characterized in that: The slot antenna structure is further formed with a plurality of metallized vias, and the metallized vias penetrate the dielectric substrate and are connected to the antenna floor.

8. The slot antenna structure according to claim 6, characterized in that: The antenna floor is made of copper.

9. A microcomputer, characterized in that: comprising the slot antenna structure according to any one of claims 1 to 8, and A shell body, a side wall of which is formed with a mounting groove, and the slot antenna structure is arranged in the mounting groove.

10. The microcomputer according to claim 9, wherein: The side wall of the shell is provided with a plurality of interfaces, and the interfaces are arranged at intervals along the length direction of the shell, and the slot antenna structure is located above the interfaces.

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