Antenna module and electronic terminal equipment

Abstract

The invention provides an antenna module and an electronic terminal device, the antenna module comprises a first radiation antenna, a second radiation antenna, a feed assembly, a grounding assembly and a substrate, the feed assembly and the grounding assembly are electrically connected with the first radiation antenna and the second radiation antenna; the first radiating antenna and the second radiating antenna are arranged on the substrate; the second radiation antenna is arranged around the first radiation antenna; the first radiation antenna comprises a first coil and a second coil, the first coil and the second coil are attached to the two faces of the substrate respectively, the first coil and the second coil are connected in series, and the second radiation antenna surrounds the first coil and / or the second coil. According to the antenna module, the overall circuit of the antenna can be simplified, the net space of the antenna can be effectively improved, the overall resistance of the antenna can be effectively avoided by changing the wiring connection of the coil, and the first radiating antenna can obtain large inductance under the condition of low alternating-current resistance.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an antenna module and an electronic terminal device using the antenna module. Background Art

[0002] Near field communication (NFC) is the integration of contactless radio frequency identification (RFID) and interconnection technology. It integrates inductive card readers, inductive cards and point-to-point communication functions on a single chip, and uses mobile terminals to realize mobile payment, electronic ticketing, access control, mobile identity recognition, anti-counterfeiting and other applications. Through the NFC function, many electronic devices such as mobile phones, PDAs, and computers can easily achieve wireless connection and data sharing. Wireless charging (WPC, wireless power charging), especially the emergence of wireless charging technology represented by electromagnetic induction, has brought convenience to consumers. At present, high-end smartphones support wireless charging. Wireless charging devices can easily charge mobile phones, freeing consumers from the constraints of wires. Due to the increasing number of camera modules in communication products, especially smartphones, there is no space for NFC antenna radiation on the top of the product, so many cases nowadays are to set NFC antennas and WPC antennas together to save space and cost.

[0003] However, when the NFC antenna and WPC antenna are combined together in the current market, the circuit setting is more complicated, which will affect the performance of the NFC antenna and the WPC antenna. The complex circuit design also makes the overall net space of the antenna smaller, which not only weakens the radiation effect of the NFC antenna, but also reduces the working efficiency of the WPC antenna.

[0004] In view of this, it is necessary for the present invention to propose an antenna module and an electronic terminal device using the antenna module. Summary of the invention

[0005] The purpose of the present invention is to provide an antenna module, which can not only simplify the overall antenna circuit and effectively increase the antenna net space, but also effectively avoid the overall resistance of the antenna by changing the routing connection of the coil, so that the first radiating antenna can obtain a larger inductance under a lower AC resistance.

[0006] To solve the above technical problems, the present invention provides an antenna module, which includes a first radiating antenna, a second radiating antenna, a feeding component, a grounding component and a substrate, wherein the feeding component and the grounding component are electrically connected to the first radiating antenna and the second radiating antenna; the first radiating antenna and the second radiating antenna are both arranged on the substrate; the second radiating antenna is arranged around the first radiating antenna; the first radiating antenna includes a first coil and a second coil, the first coil and the second coil are respectively attached to two sides of the substrate, the first coil and the second coil are connected in series, and the second radiating antenna surrounds the first coil and / or the second coil.

[0007] As a further improvement of the present invention, the feeding component includes a first feeding point, the grounding component includes a first grounding point, the first feeding point is electrically connected to one end of the first coil, and the first grounding point is electrically connected to one end of the second coil.

[0008] As a further improvement of the present invention, one end of the first coil is led out from the first feeding point and wound clockwise or counterclockwise; one end of the second coil is led out from the first grounding point and wound clockwise or counterclockwise, and the other end of the first coil and the other end of the second coil are connected in series.

[0009] As a further improvement of the present invention, the first coil and the second coil are arranged in a circular shape, and the inner circle ends of the first coil and the inner circle ends of the second coil are both provided with conducting holes, and the first coil and the second coil are connected in series through the conducting holes.

[0010] As a further improvement of the present invention, one end of the first coil is wound clockwise or counterclockwise from the outer circle to the inner circle, passing through the conducting hole, and the inner circle end of the second coil is wound from the inner circle to the outer circle along the winding direction of the first coil.

[0011] As a further improvement of the present invention, the first coil includes a first routing transition zone and a first winding zone, the second coil includes a second routing transition zone and a second winding zone, the first routing transition zone, the first winding zone, the second routing transition zone, and the second winding zone are respectively attached to two surfaces of the substrate, and the first winding zone and the second winding zone overlap symmetrically.

[0012] As a further improvement of the present invention, the first coil and the second coil are both divided into three windings, and the distance between the three windings is in the range of 0.1 mm±0.01.

[0013] As a further improvement of the present invention, the first radiating antenna is configured as a WPC antenna coil, and the second radiating antenna is configured as an NFC antenna.

[0014] As a further improvement of the present invention, the NFC antenna surrounds the WPC antenna coil in a single turn.

[0015] As a further improvement of the present invention, the feeding component also includes a second feeding point, the grounding component includes a second grounding point, the second feeding point is electrically connected to one end of the second radiating antenna, and the second grounding point is electrically connected to the other end of the second radiating antenna.

[0016] The object of the present invention is to provide an electronic terminal device to better apply the above antenna module.

[0017] In order to solve the above technical problems, the present invention provides an electronic terminal device, which includes the above antenna module.

[0018] The present invention provides an antenna module and an electronic terminal device, wherein the antenna module includes a first radiating antenna, a second radiating antenna, a feeding component, a grounding component and a substrate, wherein the feeding component and the grounding component are electrically connected to the first radiating antenna and the second radiating antenna; the first radiating antenna and the second radiating antenna are both arranged on the substrate; the second radiating antenna is arranged around the first radiating antenna; the first radiating antenna includes a first coil and a second coil, wherein the first coil and the second coil are respectively attached to two sides of the substrate, the first coil and the second coil are connected in series, and the second radiating antenna surrounds the first coil and / or the second coil. The antenna module of the present invention can not only simplify the overall antenna circuit and effectively increase the antenna net space, but also effectively avoid the overall antenna resistance by changing the routing connection of the coil, so that the first radiating antenna can obtain a larger inductance at the same time under a lower AC resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the antenna module of the present invention.

[0020] Figure 2 for Figure 1 Exploded view of the antenna module.

[0021] Figure 3 FIG. 4 is a schematic structural diagram of another embodiment of the antenna module of the present invention.

[0022] Figure 4 The top view and cross-sectional view are the magnetic field radiation of the antenna module of the present invention.

[0023] The descriptions of the reference numerals are as follows:

[0024] Antenna module 1, first radiating antenna 12, first feeding point 121, first grounding point 122, via hole 123, first connecting hole 124, second connecting hole 125, first coil 126, second coil 127, second radiating antenna 11, second feeding point 111, second grounding point 112. DETAILED DESCRIPTION

[0025] The antenna module 1 and the electronic terminal device proposed in the present invention are further described in detail below in combination with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the accompanying drawings is often part of the actual structure. In particular, the emphasis of each accompanying drawing is different, and sometimes different proportions are used.

[0026] Near field communication uses NFC technology, and electronic devices can exchange data when they are close to each other. Through this function, wireless connection and data sharing can be easily achieved between electronic terminal devices. In addition, the emergence of wireless charging, especially wireless charging technology represented by electromagnetic induction, has brought convenience to users. Wireless charging devices can easily charge mobile phones, freeing consumers from the constraints of cables. At present, due to the increasing number of camera modules in communication products, especially smart phones, the space for the NFC antenna on the top of the product to radiate, that is, the net space of the antenna, is reduced. In addition, in order to achieve effective charging efficiency, the traditional conventional routing of the wireless charging coil is relatively complicated, which makes the overall antenna performance poor.

[0027] The present invention provides an antenna module 1, which includes a first radiating antenna 12, a second radiating antenna 11, a feeding component, a grounding component and a substrate, wherein the feeding component and the grounding component are electrically connected to the first radiating antenna 12 and the second radiating antenna 11; the first radiating antenna 12 and the second radiating antenna 11 are both arranged on the substrate; the second radiating antenna 11 is arranged around the first radiating antenna 12; the first radiating antenna 12 includes a first coil 126 and a second coil 127, the first coil 126 and the second coil 127 are respectively attached to two sides of the substrate, the first coil 126 and the second coil 127 are connected in series, and the second radiating antenna 11 surrounds the first coil 126 and / or the second coil 127.

[0028] With such a configuration, the antenna module 1 of the present invention can not only simplify the overall antenna circuit and effectively increase the antenna net space, but also effectively avoid the overall resistance of the antenna by changing the routing connection of the coil, so that the first radiating antenna 12 can obtain a larger inductance under a lower AC resistance, thereby effectively improving the wireless charging efficiency.

[0029] Further, the feeding assembly includes a first feeding point 121, and the grounding assembly includes a first grounding point 122, the first feeding point 121 is electrically connected to one end of the first coil 126, and the first grounding point 122 is electrically connected to one end of the second coil 127. Since the first coil 126 and the second coil 127 are connected in series, such a configuration enables the first coil 126 to form a return current, that is, the first feeding point 121 provides routing excitation for the first coil 126 and the second coil 127, and the first grounding point 122 provides loop grounding for the first coil 126 and the second coil 127.

[0030] The feeding assembly further includes a second feeding point 111, and the grounding assembly includes a second grounding point 112. The second feeding point 111 is electrically connected to one end of the second radiating antenna 11, and the second grounding point 112 is electrically connected to the other end of the second radiating antenna 11. Such an arrangement enables the second coil 127 to form a current loop, that is, the second feeding point 111 provides the first-running excitation to the second coil 127, and the second grounding point 112 provides the second coil 127 with loop grounding.

[0031] In the present invention, in one embodiment, the second feeding point 111 and the second grounding point 112 of the second radiating antenna 11 are located on both sides of the first feeding point 121 and the first grounding point 122 of the first radiating antenna 12, that is, the first feeding point 121 and the first grounding point 122 are located between the second feeding point 111 and the second grounding point 112. In another embodiment, the first feeding point 121 and the first grounding point 122 are both located beside the second feeding point 111 and the second grounding point 112.

[0032] Specifically, one end of the first coil 126 is led out from the first feeding point 121 and wound clockwise or counterclockwise; one end of the second coil 127 is led out from the first grounding point 122 and wound clockwise or counterclockwise, and the other end of the first coil 126 and the other end of the second coil 127 are connected in series. Preferably, the first coil 126 and the second coil 127 are arranged in a circular shape, and the inner circle end of the first coil 126 and the inner circle end of the second coil 127 are both provided with a conducting hole 123, and the first coil 126 and the second coil 127 are connected in series through the conducting hole 123. Of course, the first coil 126 and the second coil 127 can also be arranged as coils of other shapes, which is not limited here.

[0033] The first radiating antenna 12 is configured as a WPC antenna coil, and the second radiating antenna 11 is configured as an NFC antenna. The NFC antenna single-loop surrounds the WPC antenna coil. The single-loop surround setting of the NFC antenna can effectively reduce the NFC line resistance, and at the same time, it can also leave more routing space for the WPC wireless charging line.

[0034] There are currently two general processes in the industry for designing WPC coils, enameled copper wire (round copper conductor) and FPCB (flexible copper etching) circuit. In order to reduce the influence of skin effect and reduce AC resistance, WPC routing is usually divided into multiple strands. For example, for WPC antennas in the form of enameled copper wire, the thicker wire will be replaced with a thinner copper wire (commonly used wire diameter 0.06mm or 0.08mm), so that the AC resistance is as close to the DC resistance as possible, reducing the influence of the skin effect. Similarly, WPC antennas in the form of FPCB (flexible copper etching) circuits are usually divided into strands. Skin effect: refers to the uneven distribution of current inside the conductor in alternating current or alternating electromagnetic fields, and the current is mainly concentrated on the surface of the conductor. This phenomenon becomes more obvious as the frequency increases. As a result, the resistance of the conductor increases, resulting in increased power loss.

[0035] When a traditional wireless charging coil involves a combination of multiple coils, parallel connection is generally adopted, that is, more than two coils are connected in parallel, which will result in multiple through holes being opened in the coil. If the coil has too many through holes, the resistance on the circuit will increase, making the inductance of the wireless charging circuit smaller under AC resistance, which will affect the efficiency of wireless charging. In the antenna module 1 of the present invention, the first coil 126 and the second coil 127 are connected in series, that is, the wireless charging WPC circuit adopts a split-strand design, and the double-layer coil circuit on the upper and lower sides of the substrate, that is, the first coil 126 and the second coil 127 are routed and designed in series, so that the wireless charging circuit can obtain a larger inductance under the AC resistance condition.

[0036] Specifically, one end of the first coil 126 is wound clockwise or counterclockwise from the outer circle to the inner circle, passing through the conducting hole 123, and the inner circle end of the second coil 127 is wound from the inner circle to the outer circle along the winding direction of the first coil 126. The first coil 126 includes a first routing transition area and a first winding area, and the second coil 127 includes a second routing transition area and a second winding area. The first routing transition area, the first winding area, the second routing transition area, and the second winding area are respectively attached to two surfaces of the substrate, and the first winding area and the second winding area overlap symmetrically.

[0037] Thus, in the NFC and WPC two-in-one antenna module 1 of the present invention, the NFC antenna line is arranged on the periphery and is a single-turn line; the inner WPC antenna line, the single-turn line adopts a split-strand design, and the upper and lower double-layer lines are designed in series on the substrate, so that the WPC line obtains a larger inductance under a lower AC resistance.

[0038] Usually, the magnetic isolation materials used in WPC antennas have high magnetic permeability. If the number of turns of the NFC line is large, the inductance is high and the resonant frequency is low, making it difficult to obtain good NFC performance. Therefore, the NFC line of the present invention adopts a single-turn design, and the single-turn design of the NFC line can reduce the resistance of the NFC line and leave more space for the WPC line.

[0039] Furthermore, the first coil 126 and the second coil 127 are both divided into three strands, and the strand spacing range is 0.1mm±0.01. In the first embodiment of the present invention, the WPC single-turn wiring is divided into three strands, and the strand spacing is as small as possible, so that the line width can obtain more space. At the same time, the line is wound clockwise or counterclockwise from the outside to the inside in a single layer, and then jumps to another layer after the innermost circle, and then winds from the inside to the outside along the same winding direction, finally forming a complete WPC line. The first coil 126 includes a first wiring transition area and a first winding area, and the second coil 127 includes a second wiring transition area and a second winding area. The first wiring transition area, the first winding area, the second wiring transition area, and the second winding area are respectively attached to the two sides of the substrate, and the first winding area and the second winding area overlap symmetrically. That is, the line width, line spacing and branch line spacing of the upper and lower layers of the first radiating antenna 12 of the present invention, except for the line transition area, namely the first routing transition area and the second routing transition area, other areas, namely the first winding area and the second winding area, remain overlapped and cannot cross.

[0040] like Figure 4 As shown, there are a top view and a cross-sectional view of the magnetic field radiation of the antenna module 1 of the present invention, from which it can be seen that the magnetic field radiation of the first radiating antenna 12 in the antenna module 1 of the present invention is stronger than the traditional radiation, and therefore the radiation efficiency is high.

[0041] If the upper and lower coils of the substrate, i.e., the first coil 126 and the second coil 127, are wound crosswise, the line width of one layer of the routing line will cover the line spacing of another layer, or the line spacing will cover the line width, resulting in the overall line being "blocky". Affected by the skin effect, the AC resistance is very large, and the inductance is very low. In addition, the WPC line stranding design can reduce the impact of the skin effect, but the more strands, the better, because too many strands will cause the DC resistance to increase, and then the AC resistance to increase. Therefore, the best effect of stranding is to ensure that the DC resistance is normal, so that the AC resistance is as equal to the DC resistance as possible, so as to minimize the impact of the skin effect.

[0042] The first radiating antenna 12 further includes a first connection hole 124 and a second connection hole 125, wherein the first connection hole 124 is used to connect the first grounding point 122 of the second coil 127, and the second connection hole 125 is used to connect the first feeding point 121 of the first coil 126. Of course, the first connection hole 124 and the second connection hole 125 can also be connected to the first feeding point 121 of the first coil 126 and the first grounding point 122 of the second coil 127, respectively, and this is not limited here.

[0043] In summary, the present invention provides an antenna module 1 and an electronic terminal device, wherein the antenna module 1 includes a first radiating antenna 12, a second radiating antenna 11, a feeding component, a grounding component and a substrate, wherein the feeding component and the grounding component are electrically connected to the first radiating antenna 12 and the second radiating antenna 11; the first radiating antenna 12 and the second radiating antenna 11 are both arranged on the substrate; the second radiating antenna 11 is arranged around the first radiating antenna 12; the first radiating antenna 12 includes a first coil 126 and a second coil 127, wherein the first coil 126 and the second coil 127 are respectively attached to two sides of the substrate, the first coil 126 and the second coil 127 are connected in series, and the second radiating antenna 11 surrounds the first coil 126 and / or the second coil 127. The antenna module 1 of the present invention can not only simplify the overall antenna circuit and effectively increase the antenna net space, but also effectively avoid the overall antenna resistance by changing the routing connection of the coil, so that the first radiating antenna 12 can obtain a larger inductance at the same time under a lower AC resistance.

[0044] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. In addition, the different parts between the various embodiments can also be used in combination with each other, and the present invention is not limited to this.

[0045] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An antenna module, characterized in that: The antenna module includes a first radiating antenna, a second radiating antenna, a feeding component, a grounding component and a substrate, wherein the feeding component and the grounding component are electrically connected to the first radiating antenna and the second radiating antenna; the first radiating antenna and the second radiating antenna are both arranged on the substrate; The second radiating antenna is arranged around the first radiating antenna; the first radiating antenna includes a first coil and a second coil, the first coil and the second coil are respectively attached to two sides of the substrate, the first coil and the second coil are connected in series, and the second radiating antenna surrounds the first coil and / or the second coil.

2. The antenna module according to claim 1, characterized in that: The feeding component includes a first feeding point, the grounding component includes a first grounding point, the first feeding point is electrically connected to one end of the first coil, and the first grounding point is electrically connected to one end of the second coil.

3. The antenna module according to claim 2, characterized in that: One end of the first coil is led out from the first feeding point and wound clockwise or counterclockwise; one end of the second coil is led out from the first grounding point and wound clockwise or counterclockwise, and the other end of the first coil and the other end of the second coil are connected in series.

4. The antenna module according to claim 1, characterized in that: The first coil and the second coil are arranged in a circular shape, and the inner circle ends of the first coil and the inner circle ends of the second coil are both provided with conducting holes, and the first coil and the second coil are connected in series through the conducting holes.

5. The antenna module according to claim 4, characterized in that: One end of the first coil is wound clockwise or counterclockwise from the outer circle to the inner circle and passes through the conducting hole, and the inner circle end of the second coil is wound from the inner circle to the outer circle along the winding direction of the first coil.

6. The antenna module according to claim 1, characterized in that: The first coil includes a first routing transition area and a first winding area, the second coil includes a second routing transition area and a second winding area, the first routing transition area, the first winding area, the second routing transition area, and the second winding area are respectively attached to two surfaces of the substrate, and the first winding area and the second winding area overlap symmetrically.

7. The antenna module according to claim 6, characterized in that: The first coil and the second coil are both divided into three windings, and the range of the distance between the three windings is 0.1 mm±0.

01.

8. The antenna module according to claim 1, characterized in that: The first radiating antenna is configured as a WPC antenna coil, and the second radiating antenna is configured as an NFC antenna.

9. The antenna module according to claim 8, characterized in that: The NFC antenna surrounds the WPC antenna coil in a single turn.

10. The antenna module according to claim 1, characterized in that: The feeding component also includes a second feeding point, the grounding component includes a second grounding point, the second feeding point is electrically connected to one end of the second radiating antenna, and the second grounding point is electrically connected to the other end of the second radiating antenna.

11. An electronic terminal device, characterized in that: The electronic terminal device includes the antenna module described in claims 1-10.

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