Antenna device of intelligent terminal

Abstract

The invention relates to the technical field of antennas, and discloses an antenna device of an intelligent terminal, which comprises a middle dielectric layer and FPC antenna layers, and the FPC antenna layers are oppositely arranged on the two sides of the middle dielectric layer; the FPC antenna layer on any side of the middle dielectric layer comprises antenna radiators, coupling branches and a microstrip transmission line, the antenna radiators are arranged on the middle dielectric layer at intervals, the coupling branches are arranged between the adjacent antenna radiators and face the antenna radiators in the first direction, and the microstrip transmission line is arranged between the coupling branches and faces the antenna radiators in the second direction. The first direction is the arrangement direction of the antenna radiator on the middle dielectric layer, and the microstrip transmission line is correspondingly connected with the antenna radiator and the coupling branch knot on the middle dielectric layer. The internal space of the intelligent terminal is saved, and the performance and reliability of the antenna device are improved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna device for a smart terminal. Background Art

[0002] With the rapid development of smart devices and the Internet of Things (IoT), integration, miniaturization, low latency and high transmission rate have become the development trend of future smart communication products. In actual application scenarios, the metal frame of smart terminals has a great impact on antenna performance, which brings great challenges to Wi-Fi antenna design. In addition, as the device space of smart terminals becomes smaller and smaller, the internal metal parts become more and more complex, which limits the design space of antennas. The steel sheet Wi-Fi antenna and PCB Wi-Fi antenna in related technologies occupy a large area and have poor stability. They are easily affected by surrounding metal parts, resulting in poor performance. At the same time, they are prone to electromagnetic interference with other antennas. This situation needs to be changed. Summary of the invention

[0003] In view of this, the present application provides an antenna device for a smart terminal to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solutions adopted are:

[0005] An antenna device for a smart terminal is arranged above a metal frame of the smart terminal and attached to a screen side of the smart terminal when in use, and is characterized by comprising: an intermediate dielectric layer and an FPC antenna layer, wherein the FPC antenna layer is relatively arranged on both sides of the intermediate dielectric layer;

[0006] The FPC antenna layer on the intermediate dielectric layer on either side includes an antenna radiator, a coupling branch and a microstrip transmission line, wherein the antenna radiators are arranged at intervals on the intermediate dielectric layer, and the coupling branch is arranged between adjacent antenna radiators and toward the antenna radiator along a first direction, wherein the first direction is the arrangement direction of the antenna radiator on the intermediate dielectric layer, and the microstrip transmission line is respectively connected to the antenna radiator and the coupling branch on the intermediate dielectric layer.

[0007] The present application is further configured as follows: it also includes a CVL covering film layer, and the CVL covering film layer is correspondingly connected to the FPC antenna layer and covers the FPC antenna layer and the intermediate dielectric layer.

[0008] The present application is further configured as follows: the antenna radiator is designed as a rectangular frame structure with an opening on one side, and the antenna radiator includes a first adjustment part and a second adjustment part arranged relatively to each other, the first adjustment part and the second adjustment part extend along the first direction and have adjustable lengths.

[0009] The present application is further configured as follows: the antenna radiator includes a feeding point portion, the feeding point portion is integrally connected to the first adjustment portion, and the feeding point portion is directed from the first adjustment portion toward the second adjustment portion along a second direction, wherein the second direction is perpendicular to the first direction.

[0010] The present application is further configured as follows: the microstrip transmission line includes an external connection portion and a first connection portion integrally connected to the external connection portion, the external connection portion is used to connect to a mainboard of the smart terminal, and the first connection portion is respectively connected to the antenna radiator and the coupling branch.

[0011] The present application is further configured as follows: the microstrip transmission line also includes a second connection portion spaced apart from the first connection portion, and a signal terminal is provided on the external connection portion, and the second connection portion is respectively connected to the feed point portion and the signal terminal.

[0012] The present application is further configured as follows: the intermediate medium layer has a first set thickness, and the first set thickness includes 0.05 mm.

[0013] The present application is further configured as follows: the FPC antenna layer has a second set thickness, and the second set thickness includes 0.148 mm.

[0014] The present application is further configured as follows: the CVL covering film layer has a third set thickness, and the third set thickness includes 0.037 mm.

[0015] The present application is further configured as follows: the screen of the smart terminal includes a first glass layer, a metal grid layer, a second glass layer and a Pol film layer stacked in sequence, and the CVL covering film layer is attached to the Pol film layer.

[0016] In summary, compared with the prior art, the present application discloses an antenna device for an intelligent terminal, comprising an intermediate dielectric layer and an FPC antenna layer, wherein the FPC antenna layer is relatively arranged on both sides of the intermediate dielectric layer, and the FPC antenna layer on either side of the intermediate dielectric layer comprises an antenna radiator, a coupling branch and a microstrip transmission line, and the antenna radiators are arranged at intervals on the intermediate dielectric layer, the coupling branches are arranged between adjacent antenna radiators, and the microstrip transmission lines are respectively connected to the antenna radiators and the coupling branches on the intermediate dielectric layer. That is, through the above arrangement, a double-layer antenna structure is constructed, and the isolation between adjacent antenna radiators is improved and the radiation direction of the antenna radiator is adjusted through the coupling branches, thereby avoiding interference of the antenna device with metal parts of the intelligent terminal and improving the performance and reliability of the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the assembly of the antenna device of the smart terminal of the present application;

[0019] Figure 2 It is a structural diagram of the CVL covering film layer of the hidden part of the antenna device of the smart terminal of the present application;

[0020] Figure 3 It is a schematic diagram of the layered structure of the antenna device of the smart terminal of the present application;

[0021] Figure 4 It is a schematic diagram of the internal structure of the antenna device of the smart terminal of the present application;

[0022] Figure 5 yes Figure 4 A partial enlarged view of . DETAILED DESCRIPTION

[0023] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0024] It should be noted that, in this article, the terms "include", "comprises" or any other variants 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 includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0025] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0027] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the description order of the following embodiments is not intended to limit the priority order of the embodiments.

[0029] refer to Figures 1 to 5 When used, the antenna device 200 of the embodiment of the present application is arranged above the metal frame 101 of the smart terminal 100 and attached to the screen 102 side of the smart terminal 100 to avoid direct contact between the antenna device 200 and the metal frame 101, that is, the antenna device 200 is away from the interference area of ​​the metal frame 101, thereby ensuring the stability of the performance of the antenna device 200, and by attaching to the screen 102 side of the smart terminal 100, the antenna device 200 is prevented from occupying too much of the internal space of the smart terminal 100, thereby eliminating the problem of limited antenna design space.

[0030] In the specific implementation process, the antenna device 200 includes an intermediate dielectric layer 10 and an FPC antenna layer 20, wherein the FPC antenna layer 20 is relatively configured on both sides of the intermediate dielectric layer 10. Then, the FPC antenna layer 20 is designed as a double-layer structure relative to the intermediate dielectric layer 10 to enhance the antenna performance of the antenna device 200 and make the overall structure more compact, which is conducive to adapting to the limited space inside the smart terminal 100. The FPC antenna layer 20 configured on both sides can also improve the anti-interference ability of the antenna device 200, thereby ensuring the working efficiency and reliability of the antenna device 200.

[0031] Furthermore, the FPC antenna layer 20 on the intermediate dielectric layer 10 on either side includes an antenna radiator 21 , a coupling branch 22 and a microstrip transmission line 23 .

[0032] It should be noted that the FPC antenna layer 20 is lighter and thinner than the traditional PCB antenna, and can better adapt to ultra-thin smart terminals such as smart phones, tablets, smart TVs, etc. It is flexible and not easy to break. It is suitable for various non-planar or confined space devices and supports more flexible installation methods.

[0033] The antenna radiators 21 are arranged at intervals on the intermediate dielectric layer 10, the coupling branches 22 are arranged between adjacent antenna radiators 21 and toward the antenna radiators 21 along a first direction, and the microstrip transmission line 23 is connected to the antenna radiators 21 and the coupling branches 22 on the intermediate dielectric layer 10 respectively.

[0034] Thus, the antenna radiators 21 are arranged at intervals on the intermediate dielectric layer 10 to form a multi-antenna unit structure to enhance the coverage and stability of the signal. The coupling branches 22 are arranged between adjacent antenna radiators 21 and along a first direction toward the antenna radiator 21, so that the isolation between adjacent antenna radiators 21 is improved through the electromagnetic coupling effect, thereby reducing external interference, optimizing the radiation direction, and improving the overall performance of the antenna device 200. The microstrip transmission line 23 is respectively connected to the antenna radiator 21 and the coupling branch 22 on the intermediate dielectric layer 10 to perform signal transmission and impedance matching, thereby improving the signal transmission efficiency and standing wave ratio stability.

[0035] In one example, there are two antenna radiators 21, and the two antenna radiators 21 are arranged on the intermediate dielectric layer 10. The coupling branch 22 is located between the two antenna radiators 21, and the microstrip transmission line 23 is respectively connected to the antenna radiator 21 and the coupling branch 22. Thus, the two antenna radiators 21 are configured with a coupling branch 22 to form a dual antenna architecture. Under the connection of the microstrip transmission line 23, the coupling branch 22 optimizes the current distribution of the two antenna radiators 21 by regulating the electromagnetic coupling effect, so that the current path is changed, thereby optimizing the radiation direction and gain characteristics of the antenna, and improving the isolation between the two antenna radiators 21, thereby ensuring the signal transmission stability of the antenna device 200.

[0036] The embodiment of the present application constructs an XY plane coordinate system. Figure 4 For example, the first direction is the X-axis direction, that is, the arrangement direction of the antenna radiator 21 on the intermediate dielectric layer 10, which can also be regarded as the left-right extension direction of the intermediate dielectric layer 10, and the second direction is the Y-axis direction, that is, the up-and-down extension direction on the intermediate dielectric layer 10. The first direction and the second direction are perpendicular to each other. Of course, the embodiments of the present application are not limited to this. XY can also be any other directions perpendicular to each other in space in actual needs, which will not be repeated here.

[0037] It should be noted that the intermediate dielectric layer 10 of the embodiment of the present application determines its dielectric constant by selecting materials, thereby optimizing the characteristic impedance of the microstrip transmission line 23 (stable to 50Ω) so that it matches the impedance of the feeding port, thereby reducing the return loss and improving the signal transmission efficiency of the antenna device 200. Then, the intermediate dielectric layer 10 can reduce the parasitic effects of the antenna device 200, improve its standing wave ratio stability, and further optimize the overall electromagnetic performance of the antenna device 200.

[0038] Preferably, the intermediate dielectric layer 10 is made of glass fiber reinforced epoxy resin or polytetrafluoroethylene material.

[0039] Preferably, the intermediate dielectric layer 10 has a first set thickness, and the first set thickness includes 0.05 mm. Based on the first set thickness of 0.05 mm, the intermediate dielectric layer 10 can accurately cooperate to adjust the impedance matching of the microstrip transmission line 23, ensure the transmission efficiency of the antenna device 200 signal, and optimize the occupied space of the antenna device 200 while maintaining the antenna performance, so that the antenna device 200 can be tightly integrated into the smart terminal 100, that is, the intermediate dielectric layer 10 reduces the total thickness of the antenna device 200, and the compact design maintained in the multi-layer structure meets the design requirements of miniaturization and lightweight of the antenna device 200.

[0040] It should be noted that the FPC antenna layer 20 of the embodiment of the present application is made of metallic copper material to form an antenna radiator 21, a coupling branch 22 and a microstrip transmission line 23 structure. Obviously, metallic copper has a lower resistivity, so that the FPC antenna layer 20 has a lower signal loss, and copper has excellent conductivity, which can reduce the energy transmission loss of the antenna radiator 21, the coupling branch 22 and the microstrip transmission line 23, and ensure the overall efficiency of the FPC antenna layer 20, which is crucial for wireless communication systems that require efficient signal transmission. The copper material will not change significantly due to temperature changes or current fluctuations during radiation, so it can provide stable radiation performance, and the copper material has good machinability to ensure that the manufacturing of the FPC antenna layer 20 is more flexible and efficient.

[0041] Preferably, the FPC antenna layer 20 has a second set thickness, and the second set thickness includes 0.148 mm, that is, the thickness of the antenna radiator 21, the coupling branch 22 and the microstrip transmission line 23 is 0.148 mm. Based on the second set thickness of 0.148 mm, the space occupied by the FPC antenna layer 20 in the entire antenna device 200 can be effectively reduced, so that the design of the antenna device 200 can meet the requirements of the smart terminal 100 for miniaturization and thinness without affecting the performance, that is, it helps the antenna device 200 to be more compactly integrated inside the smart terminal 100 without occupying too much physical space. At the same time, the second set thickness can ensure the flexibility of the FPC antenna layer 20, and can make the FPC antenna layer 20 bend or fold to adapt to smart terminals of various shapes and sizes. In addition, the second set thickness of 0.148 mm can provide good impedance matching characteristics, so that the signal transmission of the microstrip transmission line 23 is more stable, the reflection loss is reduced, and the efficiency of the antenna device 200 is improved.

[0042] Optionally, the thickness of the antenna radiator 21 is 0.148 mm, the length of the antenna radiator 21 is 16.5 mm, and the bandwidth of the antenna radiator 21 is 6 mm, and the small size design meets the requirements of the smart terminal 100 for miniaturization and thinness of the antenna.

[0043] Combination Figure 2 and Figure 3 The antenna device 200 also includes a CVL covering film layer 30. The CVL covering film layer 30 is correspondingly connected to the FPC antenna layer 20 and covers the FPC antenna layer 20 and the intermediate dielectric layer 10. The surface structure of the FPC antenna layer 20 is protected by the CVL covering film layer 30 to prevent the external environment from causing physical damage to the antenna, and play a role in enhancing weather resistance, anti-oxidation, and resistance to moisture, so as to ensure that the antenna can work stably for a long time in a complex environment. In addition, the dielectric properties of the CVL covering film layer 30 can help optimize the high-frequency performance of the antenna device 200, effectively reduce the loss during high-frequency signal transmission, and improve the radiation efficiency of the antenna device 200.

[0044] Preferably, the CVL covering film layer 30 has a third set thickness, and the third set thickness includes 0.037 mm, so as to better protect the antenna radiator 21, the coupling branch 22 and the microstrip transmission line 23 from scratches, wear or other external forces, and extend the service life of the antenna device 200. At the same time, based on the third set thickness, the electrical insulation of the CVL covering film layer 30 is guaranteed, so that the circuit of the FPC antenna layer 20 can work normally without being disturbed by the external electric field, that is, the CVL covering film layer 30 can play a certain electromagnetic shielding role, reduce the interference of external electromagnetic waves and the crosstalk between the antenna radiator 21, and realize a high-performance, high-stability and high-reliability antenna device 200.

[0045] It can be understood that the screen 102 of the smart terminal 100 includes a first glass layer, a metal mesh layer, a second glass layer and a Pol film layer stacked in sequence, and the CVL covering film layer 30 is attached to the Pol film layer.

[0046] In one embodiment, the antenna device 200 of the present application is a radar antenna.

[0047] In the specific implementation process, two antenna radiators 21 are arranged on the intermediate dielectric layer 10, the coupling branch 22 is located between the two antenna radiators 21, and the microstrip transmission line 23 is respectively connected to the antenna radiator 21 and the coupling branch 22, and the antenna radiator 21 is designed as a rectangular frame structure with one side open, wherein the antenna radiator 21 includes a first adjustment portion 211 and a second adjustment portion 212 arranged relatively, and the first adjustment portion 211 and the second adjustment portion 212 extend along the first direction and have adjustable lengths, that is, the resonant frequency of the antenna device 200 is optimized by the extended length of the first adjustment portion 211 and the second adjustment portion 212 along the first direction. Specifically, the length of the first adjustment portion 211 and the second adjustment portion 212 along the first direction is extended to reduce the resonant frequency of the antenna device 200 so that it can adapt to different working frequency bands.

[0048] Then, the resonant frequency of the antenna device 200 is optimized by increasing or decreasing the extended length of the first adjustment portion 211 and the second adjustment portion 212 of the antenna radiator 21, thereby ensuring that the antenna device 200 can work efficiently within the required working frequency band, and the length of the first adjustment portion 211 and the second adjustment portion 212 is adjusted to optimize the bandwidth of the antenna device 200 to improve its communication performance, and under the action of the coupling branch 22, the current distribution of the two antenna radiators 21 is regulated to change their current paths, thereby optimizing the radiation direction and gain characteristics of the antenna, and improving the isolation between the two antenna radiators 21, thereby ensuring the signal transmission stability of the antenna device 200.

[0049] Furthermore, the antenna radiator 21 includes a feed point portion 213 , the feed point portion 213 is integrally connected to the first adjustment portion 211 , and the feed point portion 213 is directed from the first adjustment portion 211 toward the second adjustment portion 212 along the second direction.

[0050] In one example, the antenna radiator 21 having a feed point portion 213 and a first adjustment portion 211 can be regarded as an inverted F-shaped structure antenna (IFA), and the overall size of the antenna radiator 21 can be stretched or enlarged to optimize the distance between the antenna feed point and the ground, so as to control the resonance depth of the antenna device 200. Specifically, the overall size of the antenna radiator 21 can be stretched or enlarged to make the gap between the feed point portion 213 and the antenna radiator 21 larger or smaller, thereby optimizing the distance between the feed point portion 213 and the ground, thereby optimizing the resonance depth of the antenna device 200, so as to ensure the high performance, high stability and high reliability of the antenna device 200.

[0051] In one embodiment, the microstrip transmission line 23 includes an external connection portion 233 and a first connection portion 231 integrally connected to the external connection portion 233, the external connection portion 233 is used to connect to the mainboard of the smart terminal 100, and the first connection portion 231 is respectively connected to the antenna radiator 21 and the coupling branch 22 to transmit the mainboard signal of the smart terminal 100 to the antenna device 200 through the microstrip transmission line 23, and the first connection portion 231 extends along the intermediate dielectric layer 10 according to environmental requirements to ensure that the signal reaches the antenna radiator 21 and the coupling branch 22 with lower loss.

[0052] Furthermore, the microstrip transmission line 23 also includes a second connection portion 232 that is spaced apart from the first connection portion 231, and a signal terminal 234 is provided on the external connection portion 233. The second connection portion 232 is respectively connected to the feed point portion 213 and the signal terminal 234. Thus, the first connection portion 231 of the microstrip transmission line 23 transmits the signal from the external connection portion 233 to the antenna radiator 21 and the coupling branch 22 and cooperates with the coupling branch 22 to adjust the current path. The second connection portion 232 is spaced apart from the first connection portion 231 and is used to connect to the feed point portion 213 to further optimize the signal transmission of the antenna, ensuring that the antenna device 200 receives an appropriate current signal for effective radiation. The spacing design between the second connection portion 232 and the first connection portion 231 can help adjust the impedance characteristics of the microstrip transmission line 23, thereby better matching the antenna impedance and reducing signal reflection and loss, that is, optimizing the signal path of the microstrip transmission line 23 based on the second connection portion 232, and achieving more precise signal control through the feed point portion 213.

[0053] The external connection portion 233 may be provided with a plurality of signal terminals 234 to match an external terminal device.

[0054] In summary, the antenna device of the smart terminal of the embodiment of the present application includes an intermediate dielectric layer 10 and an FPC antenna layer 20, wherein the FPC antenna layer 20 is relatively arranged on both sides of the intermediate dielectric layer 10, thereby constructing a double-layer antenna structure, and the FPC antenna layer 20 on either side of the intermediate dielectric layer 10 includes an antenna radiator 21, a coupling branch 22 and a microstrip transmission line 23, and the antenna radiators 21 are arranged at intervals on the intermediate dielectric layer 10, the coupling branches 22 are arranged between adjacent antenna radiators 21, and the microstrip transmission line 23 is respectively connected to the antenna radiator 21 and the coupling branch 22 on the intermediate dielectric layer 10, that is, under the action of the coupling branch 22, two antenna radiators 21 are configured with one coupling branch 22 to form a dual antenna. The coupling branch 22 adjusts the current distribution of the two antenna radiators 21 to change their current paths, thereby optimizing the radiation direction and gain characteristics of the antenna radiators 21 and improving the isolation between the two antenna radiators 21, thereby ensuring the signal transmission stability of the antenna device 200. The structural design of the FPC antenna layer 20 and the connection design of the intermediate dielectric layer 10, the FPC antenna layer 20 and the CVL covering film layer 30 meet the requirements of the smart terminal 100 for miniaturization and thinness of the antenna, and the resonant frequency of the antenna device 200 is optimized based on the extended length of the first adjustment part 211 and the second adjustment part 212 along the first direction, thereby ensuring the high performance, high stability and high reliability of the antenna device 200.

[0055] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An antenna device for a smart terminal, which is arranged above a metal frame of the smart terminal and attached to a screen side of the smart terminal when in use, characterized in that: include: An intermediate dielectric layer and an FPC antenna layer, wherein the FPC antenna layer is relatively arranged on two sides of the intermediate dielectric layer; The FPC antenna layer on the intermediate dielectric layer on either side includes an antenna radiator, a coupling branch and a microstrip transmission line, wherein the antenna radiators are arranged at intervals on the intermediate dielectric layer, and the coupling branch is arranged between adjacent antenna radiators and toward the antenna radiator along a first direction, wherein the first direction is the arrangement direction of the antenna radiator on the intermediate dielectric layer, and the microstrip transmission line is respectively connected to the antenna radiator and the coupling branch on the intermediate dielectric layer.

2. The antenna device of the intelligent terminal according to claim 1, characterized in that: It also includes a CVL covering film layer, which is correspondingly connected to the FPC antenna layer and covers the FPC antenna layer and the intermediate dielectric layer.

3. The antenna device of the intelligent terminal according to claim 1, characterized in that: The antenna radiator is designed as a rectangular frame structure with one side open, and the antenna radiator includes a first adjustment part and a second adjustment part arranged opposite to each other, the first adjustment part and the second adjustment part extend along the first direction and have adjustable lengths.

4. The antenna device of the intelligent terminal according to claim 3, characterized in that: The antenna radiator includes a feed point portion, the feed point portion is integrally connected to the first adjustment portion, and the feed point portion is directed from the first adjustment portion toward the second adjustment portion along a second direction, wherein the second direction is perpendicular to the first direction.

5. The antenna device of the intelligent terminal according to claim 4, characterized in that: The microstrip transmission line includes an external connection portion and a first connection portion integrally connected to the external connection portion, the external connection portion is used to connect to a mainboard of the smart terminal, and the first connection portion is respectively connected to the antenna radiator and the coupling branch.

6. The antenna device of the intelligent terminal according to claim 5, characterized in that: The microstrip transmission line further includes a second connection portion spaced apart from the first connection portion, and a signal terminal is disposed on the external connection portion, and the second connection portion is respectively connected to the feed point portion and the signal terminal.

7. The antenna device of the intelligent terminal according to claim 1, characterized in that: The intermediate dielectric layer has a first set thickness, and the first set thickness includes 0.05 mm.

8. The antenna device of the intelligent terminal according to claim 1, characterized in that: The FPC antenna layer has a second set thickness, and the second set thickness includes 0.148 mm.

9. The antenna device of the intelligent terminal according to claim 2, characterized in that: The CVL cover film layer has a third set thickness, and the third set thickness includes 0.037 mm.

10. The antenna device of the intelligent terminal according to claim 2, characterized in that: The screen of the smart terminal includes a first glass layer, a metal mesh layer, a second glass layer and a Pol film layer stacked in sequence, and the CVL covering film layer is attached to the Pol film layer.

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