Antenna device of intelligent terminal

Abstract

The utility model 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 technical field of antennas, in particular to an antenna device of a smart terminal. BACKGROUND

[0002] With the rapid development of smart devices and 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 a smart terminal has a great influence on the performance of an antenna, thereby bringing great challenges to Wi-Fi antenna design. As the device space of a smart terminal becomes smaller and the internal metal parts become more complex, the design space of an antenna is limited. The steel sheet Wi-Fi antenna and the PCB Wi-Fi antenna in the related art have a large footprint and poor stability, are easily affected by surrounding metal parts, and thus the performance is poor. At the same time, electromagnetic interference is easily generated with other antennas, which needs to be changed. CONTENT OF THE UTILITY MODEL

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

[0004] To achieve the above purpose, the technical scheme adopted is:

[0005] An antenna device of a smart terminal, when applied, is arranged above a metal frame of the smart terminal and attached to a screen side of the smart terminal, characterized in that it comprises: an intermediate medium layer and an FPC antenna layer, the FPC antenna layer being arranged on both sides of the intermediate medium layer.

[0006] The FPC antenna layer on the intermediate medium layer of any side comprises an antenna radiator, a coupling branch and a microstrip transmission line, the antenna radiators are arranged on the intermediate medium layer in a spaced manner, the coupling branch is arranged between adjacent antenna radiators and faces the antenna radiators in a first direction, wherein the first direction is the arrangement direction of the antenna radiators on the intermediate medium layer, and the microstrip transmission lines are respectively connected to the antenna radiators and the coupling branch on the intermediate medium layer.

[0007] The present application is further provided as: further comprising a CVL cover film layer, the CVL cover film layer being connected to the FPC antenna layer and covering the FPC antenna layer and the intermediate medium layer.

[0008] The present application is further provided as: the antenna radiators are designed in the form of a rectangular frame structure with one side open, and the antenna radiators comprise a first adjusting part and a second adjusting part arranged oppositely, the first adjusting part and the second adjusting part extending in the first direction and having adjustable lengths.

[0009] The application is further configured that the antenna radiator comprises a feed point part, the feed point part is integrally connected with the first adjusting part, and the feed point part is connected with the second adjusting part along a second direction by the first adjusting part, wherein the second direction is perpendicular to the first direction.

[0010] The application is further configured that the microstrip transmission line comprises an external connection part and a first connecting line part integrally connected with the external connection part, the external connection part is used for connecting a mainboard of the intelligent terminal, and the first connecting line part is respectively connected with the antenna radiator and the coupling branch.

[0011] The application is further configured that the microstrip transmission line further comprises a second connecting line part spaced from the first connecting line part, and a signal terminal is arranged on the external connection part, and the second connecting line part is respectively connected with the feed point part and the signal terminal.

[0012] The application is further configured that the intermediate medium layer has a first set thickness, and the first set thickness comprises 0.05 mm.

[0013] The application is further configured that the FPC antenna layer has a second set thickness, and the second set thickness comprises 0.148 mm.

[0014] The application is further configured that the CVL cover film layer has a third set thickness, and the third set thickness comprises 0.037 mm.

[0015] The application is further configured that the screen of the intelligent terminal comprises a first glass layer, a metal mesh layer, a second glass layer and a Pol film material layer which are sequentially stacked, and the CVL cover film layer is attached to the Pol film material layer.

[0016] In summary, compared with the prior art, the application discloses an antenna device of an intelligent terminal, which comprises an intermediate medium layer and an FPC antenna layer, wherein the FPC antenna layer is arranged on both sides of the intermediate medium layer, and the FPC antenna layer on any side of the intermediate medium layer comprises an antenna radiator, a coupling branch and a microstrip transmission line, and the antenna radiators are arranged on the intermediate medium layer in a spaced manner, the coupling branch is arranged between adjacent antenna radiators, and the microstrip transmission line is respectively connected with the antenna radiator and the coupling branch on the intermediate medium layer, that is, through the above arrangement, a double-layer antenna structure is constructed, the isolation between adjacent antenna radiators is improved and the radiation direction of the antenna radiator is adjusted through the coupling branch, the antenna device is prevented from being interfered by metal parts of the intelligent terminal, and the performance and reliability of the antenna device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0018] Figure 1 is an assembly schematic diagram of the antenna device of the intelligent terminal of the present application;

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

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

[0021] Figure 4 is an internal structure schematic diagram of the antenna device of the intelligent terminal of the present application;

[0022] Figure 5 is a partial enlarged view of Figure 4 . DETAILED DESCRIPTION

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

[0024] It should be noted that, in this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, components, features, elements with the same name in different embodiments of the present application can have the same meaning or different meanings, and the specific meaning thereof should be determined in combination with the explanation thereof in the specific embodiment or further in combination with the context in the specific embodiment.

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

[0026] In the following description, the suffixes such as "module", "part", or "unit" used for components are merely intended for facilitating explanation of the present application, and are by no means specific thereto. Thus, "module", "part", or "unit" can be used interchangeably.

[0027] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] The technical solutions shown in the present application will be described in detail below through specific embodiments. It should be noted that the description order of the following embodiments is not a limitation on the priority order of the embodiments.

[0029] Reference Figures 1 to 5 The antenna device 200 of the embodiments of the present application is applied to be arranged above the metal frame 101 of the intelligent terminal 100 and attached to the side of the screen 102 of the intelligent terminal 100, so as 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 stable performance of the antenna device 200, and avoiding excessive occupation of the internal space of the intelligent terminal 100 by the antenna device 200 by being attached to the side of the screen 102 of the intelligent terminal 100, thereby eliminating the problem of limited antenna design space.

[0030] In the specific implementation process, the antenna device 200 includes an intermediate medium layer 10 and an FPC antenna layer 20, wherein the FPC antenna layer 20 is arranged on both sides of the intermediate medium layer 10, so that the FPC antenna layer 20 is a double-layer structure design relative to the intermediate medium layer 10, so as to strengthen 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 intelligent terminal 100, and the FPC antenna layer 20 arranged 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] Further, the FPC antenna layer 20 on any side of the intermediate medium layer 10 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 intelligent terminals such as smart phones, tablet computers, smart televisions and the like, is flexible and bendable, is not easy to break, is suitable for various non-planar or limited space devices, and supports more flexible installation modes.

[0033] The antenna radiators 21 are arranged on the intermediate dielectric layer 10 in a spaced manner, the coupling branch 22 is arranged between the adjacent antenna radiators 21 and faces the antenna radiators 21 in the first direction, and the microstrip transmission line 23 is respectively connected to the antenna radiators 21 and the coupling branch 22 on the intermediate dielectric layer 10.

[0034] Therefore, the antenna radiators 21 are arranged on the intermediate dielectric layer 10 in a spaced manner to form a multi-antenna unit structure to enhance the coverage range and stability of the signal, the coupling branch 22 is arranged between the adjacent antenna radiators 21 and faces the antenna radiators 21 in the first direction, so that the isolation between the 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, and the microstrip transmission line 23 is respectively connected to the antenna radiators 21 and the coupling branch 22 on the intermediate dielectric layer 10 to perform signal transmission and impedance matching, thereby improving the transmission efficiency and standing wave ratio stability of the signal.

[0035] In one example, the number of antenna radiators 21 is two, 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 radiators 21 and the coupling branch 22, thereby the two antenna radiators 21 are configured with one 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 of the two antenna radiators 21 changes, thereby optimizing the radiation direction and gain characteristics of the antenna, and improving the isolation between the two antenna radiators 21 to ensure the signal transmission stability of the antenna device 200.

[0036] The X-Y plane coordinates are constructed in the embodiment of the application, so that the first direction is the X-axis direction, and the second direction is the Y-axis direction. Figure 4 For example, the first direction is the X-axis direction, that is, the arrangement direction of the antenna radiators 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-down extension direction of the intermediate dielectric layer 10, and the first direction and the second direction are perpendicular to each other. Of course, the embodiment of the application is not limited to this, and X-Y can also be other arbitrary directions perpendicular to each other in actual requirements, which will not be described 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 (stabilized at 50Ω) of the microstrip transmission line 23, matching the impedance of the feed port, thereby reducing the return loss and improving the signal transmission efficiency of the antenna device 200. Then, through the intermediate dielectric layer 10, the antenna device 200 parasitic effect can be reduced, and the stability of the standing wave ratio can be improved, further optimizing 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 0.05mm. Based on the first set thickness of 0.05mm, the intermediate dielectric layer 10 can accurately match 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 under the premise of maintaining the antenna performance, so that the antenna device 200 can be closely 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 light weight 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 copper material to form the antenna radiator 21, the coupling branch 22 and the microstrip transmission line 23 structure. Obviously, copper has a low resistivity, so that the FPC antenna layer 20 has a low signal loss, and the 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 high-efficiency signal transmission. In addition, copper material will not change greatly due to temperature change or current fluctuation when radiating, so it can provide stable radiation performance, and copper material has good processability 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 intelligent 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 intelligent 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, so that the FPC antenna layer 20 can be bent or folded to adapt to intelligent 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 includes 0.148 mm, and the length of the antenna radiator 21 is 16.5 mm, and the width of the antenna radiator 21 is 6 mm. In turn, the small size design meets the requirements of the intelligent terminal 100 for antenna miniaturization and thinness.

[0043] In combination Figure 2 and Figure 3 The antenna device 200 further includes a CVL cover film layer 30, which is 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 cover film layer 30 to prevent physical damage to the antenna from the external environment, thereby enhancing weather resistance, oxidation resistance and moisture resistance to ensure long-term stable operation of the antenna in complex environments. In addition, the dielectric properties of the CVL cover film layer 30 can help optimize the high-frequency performance of the antenna device 200, effectively reducing the loss during high-frequency signal transmission and improving the radiation efficiency of the antenna device 200.

[0044] Preferably, the CVL cover 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, thereby prolonging the service life of the antenna device 200. At the same time, based on the third set thickness, the electrical insulation of the CVL cover film layer 30 is ensured, so that the circuit of the FPC antenna layer 20 can work normally without being disturbed by external electric fields, that is, the CVL cover film layer 30 can play a certain electromagnetic shielding role to reduce the interference of external electromagnetic waves and the crosstalk between the antenna radiators 21, thereby realizing an antenna device 200 with high performance, high stability and high reliability.

[0045] It can be understood that the screen 102 of the intelligent terminal 100 comprises a first glass layer, a metal mesh layer, a second glass layer and a Pol film layer which are sequentially stacked, and the CVL cover 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, 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, and the antenna radiator 21 is designed as a rectangular frame structure with one side open, wherein the antenna radiator 21 comprises a first adjusting part 211 and a second adjusting part 212 arranged oppositely, and the first adjusting part 211 and the second adjusting part 212 extend along a first direction and have adjustable lengths, that is, the resonance frequency of the antenna device 200 is optimized by the extension length of the first adjusting part 211 and the second adjusting part 212 along the first direction, and specifically, the length of the first adjusting part 211 and the second adjusting part 212 along the first direction is lengthened to reduce the resonance frequency of the antenna device 200, so as to adapt to different working frequency bands.

[0048] Therefore, the resonance frequency of the antenna device 200 is optimized by increasing or decreasing the extension length of the first adjusting part 211 and the second adjusting part 212 of the antenna radiator 21, so as to ensure that the antenna device 200 can work efficiently in the required working frequency band, and the length of the first adjusting part 211 and the second adjusting part 212 is adjusted to optimize the bandwidth of the antenna device 200, so as to improve the communication performance thereof, and under the action of the coupling branch 22, the current distribution of the two antenna radiators 21 is regulated and controlled, so that the current path thereof is changed, thereby optimizing the radiation direction and gain characteristics of the antenna, and improving the isolation between the two antenna radiators 21, so as to ensure the signal transmission stability of the antenna device 200.

[0049] Further, the antenna radiator 21 comprises a feed point part 213 which is integrally connected with the first adjusting part 211, and the feed point part 213 extends from the first adjusting part 211 to the second adjusting part 212 along a second direction.

[0050] In one example, the antenna radiator 21 with the feed point part 213 and the first adjusting part 211 can be regarded as an inverted F-shaped structure antenna (IFA), and then 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, and in particular, the overall size of the antenna radiator 21 can be stretched or enlarged to make the gap between the feed point part 213 and the antenna radiator 21 larger or smaller, so as to optimize the distance between the feed point part 213 and the ground, thereby optimizing the resonance depth of the antenna device 200, to ensure 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 part 233 and a first connecting part 231 integrally connected with the external connection part 233, the external connection part 233 is used to connect the mainboard of the intelligent terminal 100, and the first connecting part 231 respectively corresponds to the antenna radiator 21 and the coupling branch 22, so as to transmit the signal of the mainboard of the intelligent terminal 100 to the antenna device 200 through the microstrip transmission line 23, and the first connecting part 231 is extended along the intermediate dielectric layer 10 according to the environment, to ensure that the signal reaches the antenna radiator 21 and the coupling branch 22 with low loss.

[0052] Further, the microstrip transmission line 23 further includes a second connecting part 232 spaced apart from the first connecting part 231, and the external connection part 233 is provided with a signal terminal 234, and the second connecting part 232 is connected with the feed point part 213 and the signal terminal 234 respectively, so that the first connecting part 231 of the microstrip transmission line 23 transmits the signal from the external connection part 233 to the antenna radiator 21 and the coupling branch 22 and adjusts the current path in cooperation with the coupling branch 22, the second connecting part 232 is spaced apart from the first connecting part 231, and is used to be connected with the feed point part 213 to further optimize the signal transmission of the antenna, to ensure that the antenna device 200 receives appropriate current signals for effective radiation, and the spacing design of the second connecting part 232 and the first connecting part 231 can help to adjust the impedance characteristics of the microstrip transmission line 23, so as to better match the antenna impedance, reduce signal reflection and loss, that is, to optimize the signal path of the microstrip transmission line 23 based on the second connecting part 232, and to realize more accurate signal control through the feed point part 213.

[0053] In the external connection part 233, a plurality of signal terminals 234 can be provided to match external terminal equipment.

[0054] In summary, the antenna device of the smart terminal in the embodiment of the present application comprises an intermediate medium layer 10 and an FPC antenna layer 20, wherein the FPC antenna layer 20 is arranged on both sides of the intermediate medium layer 10, thereby constructing a double-layer antenna structure, and the FPC antenna layer 20 on any side of the intermediate medium layer 10 comprises an antenna radiator 21, a coupling branch 22 and a microstrip transmission line 23, and the antenna radiators 21 are arranged on the intermediate medium layer 10 in a spaced manner, the coupling branch 22 is 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 medium layer 10, that is, under the action of the coupling branch 22, two antenna radiators 21 are arranged with one coupling branch 22 to form a double-antenna structure, the coupling branch 22 changes the current path of the two antenna radiators 21 by adjusting the current distribution of the two antenna radiators 21, thereby optimizing the radiation direction and gain characteristics of the antenna radiator 21, improving the isolation between the two antenna radiators 21, ensuring the signal transmission stability of the antenna device 200, and through the structural design of the FPC antenna layer 20, the connection design of the intermediate medium layer 10, the FPC antenna layer 20 and the CVL cover film layer 30 meets the requirements of the smart terminal 100 for antenna miniaturization and thinning, and the extension length of the first adjusting part 211 and the second adjusting part 212 along the first direction optimizes the resonant frequency of the antenna device 200, thereby ensuring the high performance, high stability and high reliability of the antenna device 200.

[0055] The above has described the present application in detail, and the principles and implementation modes of the present application have been described by applying specific examples; the above description of the embodiments is only used to help understand the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description of the content of the specification should not be understood as a limitation of the present application.

Claims

1. An antenna device of a smart terminal, when applied, disposed above a metal bezel of the smart terminal and attached to a screen side of the smart terminal, characterized in that, The application relates to a smart terminal, which comprises an intermediate medium layer and an FPC antenna layer arranged on two sides of the intermediate medium layer; the FPC antenna layer on any side of the intermediate medium layer comprises antenna radiators, coupling branches and microstrip transmission lines, the antenna radiators are arranged on the intermediate medium layer at intervals, the coupling branches are arranged between adjacent antenna radiators and face the antenna radiators in a first direction, wherein the first direction is the arrangement direction of the antenna radiators on the intermediate medium layer, and the microstrip transmission lines correspond to the antenna radiators and the coupling branches respectively on the intermediate medium layer. The application further comprises a CVL cover film layer, which is correspondingly connected to the FPC antenna layer and covers the FPC antenna layer and the intermediate medium layer. The antenna radiators are designed as one-side-opened rectangular frame structures, and the antenna radiators comprise first adjusting parts and second adjusting parts arranged oppositely, the first adjusting parts and the second adjusting parts extend in the first direction and have adjustable lengths.

2. The antenna apparatus of the intelligent terminal according to claim 1, wherein The antenna radiators comprise feed point parts, the feed point parts are integrally connected with the first adjusting parts, and the feed point parts face the second adjusting parts from the first adjusting parts in a second direction, wherein the second direction is perpendicular to the first direction.

3. The antenna apparatus of the intelligent terminal according to claim 1, wherein The microstrip transmission lines comprise external connection parts and first connecting line parts integrally connected with the external connection parts, the external connection parts are used for connecting mainboards of the smart terminals, and the first connecting line parts correspond to the antenna radiators and the coupling branches respectively.

4. The antenna device of the intelligent terminal according to claim 3, wherein The microstrip transmission lines further comprise second connecting line parts spaced from the first connecting line parts, and signal terminals are arranged on the external connection parts, and the second connecting line parts are connected with the feed point parts and the signal terminals respectively.

5. The antenna device of the intelligent terminal according to claim 4, wherein The intermediate medium layer has a first set thickness, and the first set thickness is 0.05 mm.

6. The antenna device of the intelligent terminal according to claim 5, wherein The FPC antenna layer has a second set thickness, and the second set thickness is 0.148 mm.

7. The antenna apparatus of the intelligent terminal according to claim 1, wherein The CVL cover film layer has a third set thickness, and the third set thickness is 0.037 mm.

8. The antenna apparatus of the intelligent terminal according to claim 1, wherein The screen of the smart terminal comprises a first glass layer, a metal mesh layer, a second glass layer and a Pol film layer which are stacked in sequence, and the CVL cover film layer is attached to the Pol film layer.

9. The antenna apparatus of the intelligent terminal according to claim 2, wherein ​ 10. The antenna apparatus of the intelligent terminal according to claim 2, wherein ​

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