Two-in-one combined antenna and mobile terminal

Abstract

The utility model discloses a two-in-one combined antenna and a mobile terminal, and relates to the technical field of wireless communication. The two-in-one combined antenna comprises a double-sided flexible circuit board and a nanocrystalline surface adhesive layer, the double-sided flexible circuit board comprises a substrate, a first coil formed by coiling a plurality of strands of wires side by side and a second coil formed by coiling a plurality of strands of wires side by side, the first coil is arranged on the front surface of the substrate, and the second coil is arranged on the back surface of the substrate. The second coil is arranged on the reverse side of the substrate, and the nanocrystalline surface adhesive layer is arranged on the reverse side of the substrate and covers the second coil. Specifically, the substrate is an FPC board, the first coil and the second coil are arranged on the front face and the back face of the substrate respectively, the first coil and the second coil are both formed by winding multiple strands of wires side by side, the working impedance of the antenna can be reduced, heating can be reduced, and efficiency can be improved; and the nanocrystalline surface adhesive layer is arranged on the back surface of the substrate and covers the second coil, so that external magnetic interference can be isolated, and the performance of the antenna is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless communication technical field especially relates to a two-in-one combined antenna and mobile terminal. BACKGROUND

[0002] With the development of electronic intelligent products, its function is more and more powerful, and the corresponding product size is smaller and thinner, and the performance and size of the antenna as one of the important components of wireless communication electronic products are directly related to the advantages and disadvantages of electronic products, and with the miniaturization development of wireless communication electronic products, WPC coil antenna has become an indispensable part of intelligent mobile terminal (such as smart phone or smart watch).

[0003] At present, the WPC coil antenna in the related art is manufactured by FPC (Flexible Printed Circuit), and the current WPC-FPC design is mostly made of single wire coiled, and there is skin effect in the eddy current field, the current of the WPC coil antenna during work will spread to the edge circuit, so as to cause the working impedance of single wire inconsistent with the direct current impedance, even greatly different, resulting in large working impedance of the antenna and easy to heat. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a two-in-one combined antenna and mobile terminal to solve the technical problem that the current WPC-FPC design in the prior art is mostly made of single wire coiled, and there is skin effect in the eddy current field, the current of the WPC coil antenna during work will spread to the edge circuit, resulting in large working impedance of the antenna.

[0005] The utility model provides a two-in-one combined antenna, including double-sided flexible circuit board and nanocrystalline surface adhesive layer, the double-sided flexible circuit board includes substrate, the first coil that is made of multiple lines and is coiled side by side and the second coil that is made of multiple lines and is coiled side by side, the first coil is arranged at the front of the substrate, the second coil is arranged at the back of the substrate, the nanocrystalline surface adhesive layer is arranged on the back of the substrate and covers the second coil.

[0006] The two-in-one combined antenna as described above, the front of the nanocrystalline surface adhesive layer is attached to the back of the double-sided flexible circuit board, the back of the double-sided flexible circuit board has a protrusion, and the front of the nanocrystalline surface adhesive layer is provided with a avoiding slot for avoiding the protrusion.

[0007] The two-in-one combination antenna as described above, the nanocrystal surface adhesive layer comprises a black film, a first nanocrystal layer, a first laminated adhesive layer, a second nanocrystal layer, a second laminated adhesive layer, a third nanocrystal layer, a third laminated adhesive layer and a double-sided adhesive layer which are sequentially stacked, and the double-sided adhesive layer is attached to the reverse side of the double-sided flexible circuit board.

[0008] The two-in-one combination antenna as described above, the avoiding groove penetrates through the third laminated adhesive layer and the double-sided adhesive layer.

[0009] The two-in-one combination antenna as described above, the double-sided flexible circuit board further comprises a first cover film and a second cover film, the first cover film is arranged on the front side of the substrate and covers the first coil, the second cover film is arranged on the reverse side of the substrate and covers the second coil, and the nanocrystal surface adhesive layer is attached to the second cover film.

[0010] The two-in-one combination antenna as described above, the first coil and the second coil are correspondingly arranged, the outer diameters of the first coil and the second coil are both 47.4±0.1mm, and the inner diameters of the first coil and the second coil are both 21.1±0.1mm.

[0011] The two-in-one combination antenna as described above, the substrate comprises a substrate body and an extension plate protruding from one side edge of the substrate body, the first coil and the second coil are arranged on the front and reverse sides of the substrate body respectively, the extension plate is provided with a first feed point and a second feed point, the first feed point and the second feed point both penetrate through the front and reverse sides of the extension plate, and the first feed point and the second feed point are electrically connected with the first coil and the second coil respectively.

[0012] The two-in-one combination antenna as described above, the double-sided flexible circuit board further comprises a first winding NFC antenna and a second winding NFC antenna, the first winding NFC antenna is arranged on the front side of the substrate body and surrounds the first coil, and the second winding NFC antenna is arranged on the reverse side of the substrate body and surrounds the second coil.

[0013] The two-in-one combination antenna as described above, the extension plate is provided with a third feed point and a fourth feed point, the third feed point and the fourth feed point both penetrate through the front and reverse sides of the extension plate, the third feed point is electrically connected with the first winding NFC antenna, and the fourth feed point is electrically connected with the second winding NFC antenna.

[0014] The utility model further provides a mobile terminal, including two-in-one combination antenna as described above.

[0015] Implementing the utility model embodiment will have the following beneficial effects:

[0016] In the utility model, two-in-one combination antenna includes double-sided flexible circuit board and nanocrystalline surface adhesive layer, double-sided flexible circuit board includes substrate, first coil that becomes by multiple lines and parallelly arranged spiral and second coil that becomes by multiple lines and parallelly arranged spiral, first coil sets up at the front of substrate, second coil sets up at the back of substrate, nanocrystalline surface adhesive layer sets up on the back of substrate and covers second coil.Specifically, substrate is FPC board material, the front and back of substrate are provided with first coil and second coil respectively, and first coil and second coil are all multiple lines and parallelly arranged spiral, can reduce the operating impedance of antenna, reduce heating, improve efficiency;Nanocrystalline surface adhesive layer sets up on the back of substrate and covers second coil, can insulate external magnetic interference, improve the performance of antenna. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the drawings needed to be used in the embodiment or prior art description simple introduction, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, according to these drawings, other drawings can also be obtained.

[0018] Figure 1 It is the front structure schematic diagram of double-sided flexible circuit board according to an exemplary embodiment;

[0019] Figure 2 It is the back structure schematic diagram of double-sided flexible circuit board according to an exemplary embodiment;

[0020] Figure 3 It is the back structure schematic diagram of two-in-one combination antenna according to an exemplary embodiment;

[0021] Figure 4 It is the front structure schematic diagram of nanocrystalline surface adhesive layer according to an exemplary embodiment.

[0022] Wherein: 1, double-sided flexible circuit board;11, substrate;12, first coil;13, second coil;14, first winding NFC antenna;15, second winding NFC antenna;2, nanocrystalline surface adhesive layer;21, avoiding groove;3, first feed point;4, second feed point;5, third feed point;6, fourth feed point. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0024] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0028] Referring to Figures 1-4The utility model provides a two-in-one combined antenna, including double -sided flexible circuit board 1 and nanocrystalline surface adhesive layer 2, double -sided flexible circuit board 1 includes substrate 11, the first coil 12 of by multiple strands of line parallel spiral and the second coil 13 of by multiple strands of line parallel spiral, first coil 12 sets up in the front of substrate 11, the second coil 13 sets up in the back of substrate 11, nanocrystalline surface adhesive layer 2 sets up on the back of substrate 11 and covers second coil 13. Specifically, substrate 11 is FPC board material, and first coil 12 and second coil 13 are arranged on the front and back of substrate 11 respectively, and first coil 12 and second coil 13 are both formed by multiple strands of line parallel spiral, which can reduce the working impedance of the antenna, reduce heating and improve efficiency; nanocrystalline surface adhesive layer 2 is arranged on the back of substrate 11 and covers the second coil 13, which can isolate external magnetic interference and improve the performance of the antenna.

[0029] Further, the front surface of the nanocrystalline surface adhesive layer 2 is attached to the back surface of the double-sided flexible circuit board 1, the back surface of the double-sided flexible circuit board 1 has a protrusion, and the front surface of the nanocrystalline surface adhesive layer 2 is provided with an avoidance groove 21 for avoiding the protrusion. The double-sided flexible circuit board 1 will have an ultra-thick phenomenon when passing through the via, thereby forming a protrusion. By providing the avoidance groove 21 on the second cover film, the second cover film can be tightly attached thereto, achieving flatness in structure.

[0030] Further, the nanocrystalline surface adhesive layer 2 includes a black film, a first nanocrystalline layer, a first laminated adhesive layer, a second nanocrystalline layer, a second laminated adhesive layer, a third nanocrystalline layer, a third laminated adhesive layer, and a double-sided adhesive layer, which is attached to the back surface of the double-sided flexible circuit board 1. The mainboard device can be shielded from the interference of the WPC two-in-one combined antenna magnetic field.

[0031] Further, the avoidance groove 21 penetrates the third laminated adhesive layer and the double-sided adhesive layer, so that the double-sided flexible circuit board 1 can be partially embedded in the third laminated adhesive layer and the double-sided adhesive layer, so that the performance is no longer dependent on the thickness of the single copper plate, which is beneficial to reduce the cost.

[0032] Further, the double-sided flexible circuit board 1 further includes a first cover film (not shown in the figure) and a second cover film (not shown in the figure), the first cover film is arranged on the front surface of the substrate 11 and covers the first coil 12, the second cover film is arranged on the back surface of the substrate 11 and covers the second coil 13, and the nanocrystalline surface adhesive layer 2 is attached to the second cover film.

[0033] Further, the substrate 11 comprises a substrate body and an extension plate protruding from one side edge of the substrate body, the first coil 12 and the second coil 13 are respectively arranged on the front and back surfaces of the substrate body, the first feed point 3 and the second feed point 4 are arranged on the extension plate, the first feed point 3 and the second feed point 4 both penetrate the front and back surfaces of the extension plate, and the first feed point 3 and the second feed point 4 are respectively electrically connected with the first coil 12 and the second coil 13.

[0034] Further, the double-sided flexible circuit board 1 further comprises a first winding NFC antenna 14 and a second winding NFC antenna 15, the first winding NFC antenna 14 is arranged on the front surface of the substrate body and surrounds the first coil 12, and the second winding NFC antenna 15 is arranged on the back surface of the substrate body and surrounds the second coil 13. Moreover, the first winding NFC antenna 14 is covered by a first cover film, and the second winding NFC antenna 15 is covered by a second cover film.

[0035] Further, the extension plate is provided with a third feed point 5 and a fourth feed point 6, the third feed point 5 and the fourth feed point 6 both penetrate the front and back surfaces of the extension plate, the third feed point 5 is electrically connected with the first winding NFC antenna 14, and the fourth feed point 6 is electrically connected with the second winding NFC antenna 15.

[0036] Further, the number of wire strands of the first coil 12 and the second coil 13 is respectively 2-4, and in the present example, the number of wire strands of the first coil 12 and the second coil 13 is both 4.

[0037] Further, the first coil 12 and the second coil 13 are correspondingly arranged, the outer diameter of the first coil 12 and the second coil 13 is both 47.4±0.1mm, and the inner diameter of the first coil 12 and the second coil 13 is both 21.1±0.1mm.

[0038] It should be noted that the winding NFC antenna is an NFC (Near Field Communication) antenna made in the form of a coil, NFC is a short-range wireless communication technology, which transmits data in a non-contact manner in a short distance through radio frequency, and the NFC antenna is used for receiving and transmitting NFC signals, wherein the winding NFC antenna of the embodiment is made of low resistivity wire, which can be wound into a coil shape according to specific design specifications, and the coil shape of the embodiment is rectangular; the WPC coil antenna (Wireless Power Consortium) is an antenna type for wireless charging, which is usually made of wire wound into a coil shape, mainly used for transmitting and receiving radio energy to realize the function of wireless charging, specifically, the role of the WPC coil antenna in wireless charging is to receive the electromagnetic field energy transmitted by the transmitter (such as a wireless charging pad) and convert it into electric energy to supply the charging device (such as a smart phone, a smart watch, etc.).

[0039] In an embodiment, the application also provides a mobile terminal, which comprises the two-in-one combination antenna provided by the above-mentioned embodiments. The mobile terminal can include but is not limited to tablets, mobile phones, notebook computers, smart wearable devices, etc.

[0040] The above embodiments are only used to illustrate the technical solutions of the application, and not to limit the protection scope of the application.

Claims

1. A two-in-one combined antenna, characterized in that, The double-sided flexible circuit board comprises a substrate, a first coil formed by a plurality of wires spirally arranged side by side and a second coil formed by a plurality of wires spirally arranged side by side, the first coil is arranged on the front surface of the substrate, and the second coil is arranged on the back surface of the substrate.

2. The two-in-one combination antenna of claim 1, wherein, The front surface of the nanocrystalline surface adhesive layer is attached to the back surface of the double-sided flexible circuit board, the back surface of the double-sided flexible circuit board has a protrusion, and the front surface of the nanocrystalline surface adhesive layer is provided with an avoidance slot for avoiding the protrusion.

3. The two-in-one combination antenna of claim 2, wherein, The nanocrystalline surface adhesive layer comprises a black film, a first nanocrystalline layer, a first laminated adhesive layer, a second nanocrystalline layer, a second laminated adhesive layer, a third nanocrystalline layer, a third laminated adhesive layer, and a double-sided adhesive layer, which is attached to the back surface of the double-sided flexible circuit board.

4. The two-in-one combination antenna of claim 3, wherein, The avoidance slot penetrates the third laminated adhesive layer and the double-sided adhesive layer.

5. The two-in-one combination antenna of claim 1, wherein, The double-sided flexible circuit board further comprises a first cover film and a second cover film, the first cover film is arranged on the front surface of the substrate and covers the first coil, and the second cover film is arranged on the back surface of the substrate and covers the second coil.

6. The two-in-one combination antenna of claim 1, wherein, The first coil and the second coil are correspondingly arranged, the outer diameter of the first coil and the second coil is 47.4±0.1mm, and the inner diameter of the first coil and the second coil is 21.1±0.1mm.

7. The two-in-one combination antenna of claim 1, wherein, The substrate comprises a substrate body and an extension plate protruding from one side edge of the substrate body, the first coil and the second coil are arranged on the front and back surfaces of the substrate body respectively, the extension plate is provided with a first feed point and a second feed point, the first feed point and the second feed point penetrate the front and back surfaces of the extension plate, and the first feed point and the second feed point are electrically connected with the first coil and the second coil respectively.

8. The two-in-one combination antenna of claim 7, wherein, The double-sided flexible circuit board further comprises a first winding NFC antenna and a second winding NFC antenna, the first winding NFC antenna is arranged on the front surface of the substrate body and surrounds the first coil, and the second winding NFC antenna is arranged on the back surface of the substrate body and surrounds the second coil.

9. The two-in-one combination antenna of claim 8, wherein, The extension plate is provided with a third feed point and a fourth feed point, the third feed point and the fourth feed point penetrate the front and back surfaces of the extension plate, the third feed point is electrically connected with the first winding NFC antenna, and the fourth feed point is electrically connected with the second winding NFC antenna.

10. A mobile terminal, characterized by The double-sided flexible circuit board further comprises a first winding NFC antenna and a second winding NFC antenna, the first winding NFC antenna is arranged on the front surface of the substrate body and surrounds the first coil, and the second winding NFC antenna is arranged on the back surface of the substrate body and surrounds the second coil. The double-sided flexible circuit board further comprises a first winding NFC antenna and a second winding NFC antenna, the first winding NFC antenna is arranged on the front surface of the substrate body and surrounds the first coil, and the second winding NFC antenna is arranged on the back surface of the substrate body and surrounds the second coil.

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