Near-field wireless communication antenna

Abstract

The utility model discloses a near-field wireless communication antenna which comprises an antenna radiator and an antenna PCB, the antenna radiator is arranged on the antenna PCB in a clockwise coiling mode from inside to outside, and the distance between adjacent wires is larger than 5 mm; the antenna radiator is coiled into a square shape, and the corner is a right-angle corner; the antenna also comprises a ferrite, a main PCB, and an antenna bonding pad. The main PCB, the ferrite and the antenna PCB are sequentially stacked from bottom to top to form a layered structure; the antenna bonding pad enables the antenna radiator to be communicated with the antenna PCB and fixes the layered structure at the same time. According to the scheme, the size can be effectively reduced, on the other hand, the routing of the antenna radiator is clockwise from inside to outside, the distance between every two circles is larger than 5 mm, the whole antenna radiator adopts a square structure, and the corner adopts a right angle, so that the card swiping height is higher, and the magnetic field intensity is stronger.

Description

Technical Field

[0001] The present invention relates to a communication antenna, and in particular to a near-field wireless communication antenna. Background Art

[0002] At present, some products with near-field antenna overall design used in wireless charging have blind spots for card swiping and card inspection. At the same time, the overall magnetic field radiation is uneven and weak, and the card swiping height is low, which means that the card needs to be swiped close to the target.

[0003] On the other hand, the current connection method between the antenna board and the main board of the near-field communication module is mostly through cables or pin connectors. Such a structure will cause the overall volume to be too large, and a considerable area needs to be reserved for installation during installation, which increases the volume of the product. Summary of the invention

[0004] The present invention provides a near-field wireless communication antenna, which has a smaller size and a higher card swiping completion degree.

[0005] The near-field wireless communication antenna comprises: an antenna radiator and an antenna PCB board, wherein the antenna radiator is arranged on the antenna PCB board in a clockwise manner from the inside to the outside, and the spacing between adjacent traces is greater than 5 mm; the antenna radiator is coiled in a square shape, and the corners are right-angled corners; and further comprises: a ferrite, a main PCB board and an antenna pad; the main PCB board, the ferrite and the antenna PCB board are stacked in sequence from bottom to top to form a layered structure; the antenna pad connects the antenna radiator with the antenna PCB board and fixes the layered structure at the same time.

[0006] Preferably, the ferrite is mounted on the bottom surface of the antenna PCB board.

[0007] Preferably, the area of ​​the ferrite is greater than or equal to the area covered by the antenna radiator, and less than or equal to the area of ​​the antenna PCB board.

[0008] Preferably, it also includes: a fixing pad for fixing the layered structure.

[0009] Preferably, the thickness of the ferrite and the antenna PCB board is 3mm-5mm.

[0010] Preferably, when the antenna radiator is coiled, a giving way inclined portion is formed to avoid line overlap, and the inclination angle of the giving way inclined portion is 45°±10°.

[0011] Preferably, the starting portion of the antenna radiator is located inside the giving way inclined portion, and the ending portion of the antenna radiator is located outside the giving way inclined portion.

[0012] The near-field wireless communication antenna of the utility model has a layered structure composed of various parts, and the antenna radiator is more densely coiled, which can effectively reduce the size. The antenna pad not only connects the antenna radiator and the antenna PCB board, but also plays a role in fixing the layered structure. This shared design further helps to reduce the volume. On the other hand, the antenna radiator is arranged clockwise from inside to outside, and the spacing between each circle is greater than 5mm. The overall structure is square, and the corners are right angles, so that the card swiping height is higher and the magnetic field strength is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 An exploded schematic diagram of a near-field wireless communication antenna;

[0014] Figure 2 Schematic diagram of a top view of a near-field wireless communication antenna. DETAILED DESCRIPTION

[0015] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0016] A near-field wireless communication antenna comprises: an antenna radiator 1 and an antenna PCB board 2, wherein the antenna radiator 1 is arranged on the antenna PCB board 2 in a clockwise manner from the inside to the outside, and the spacing between adjacent traces is greater than 5 mm; the antenna radiator 1 is coiled in a square shape, and the corners are right-angled corners; and further comprises: a ferrite 3, a main PCB board 4, and an antenna pad 5; the main PCB board 4, the ferrite 3, and the antenna PCB board 2 are stacked in sequence from bottom to top to form a layered structure; the antenna pad 5 connects the antenna radiator 1 with the antenna PCB board 2 and fixes the layered structure. The ferrite 3 is mounted on the bottom surface of the antenna PCB board 2. In this way, in addition to the electromagnetic shielding protection function mentioned above, the ferrite 3 can also dissipate heat for the antenna PCB board 2 to a certain extent.

[0017] It also includes: a fixing pad 6 for fixing the layered structure.

[0018] The thickness of the ferrite 3 and the antenna PCB board 2 is 3 mm-5 mm.

[0019] The antenna pad 5 and the fixing pad 6 are not arranged on the same side, but preferably on two opposite sides. The antenna pad 5 generally has two arranged side by side and spaced apart, which are used for power transmission and electrical signal transmission between the antenna PCB board 2 and the antenna radiator 1. The fixing pad 6 is not connected to the circuit on the antenna radiator 1 and the antenna PCB board 2, and only plays a fixing role, that is, fixing the layered structure composed of the above-mentioned antenna radiator 1, the antenna PCB board 2 and the ferrite 3.

[0020] When the antenna radiator 1 is coiled, a yielding inclined portion 11 is formed to avoid line overlap, and the yielding inclined portion 11 has an inclination angle of 45°±10°. The starting portion of the antenna radiator 1 is inside the yielding inclined portion 11, and the ending portion of the antenna radiator 1 is outside the yielding inclined portion 11.

[0021] The antenna radiator 1 is a printed trace, and at least one layer is printed. The antenna radiator 1 can be printed on both the upper and lower surfaces of the antenna PCB board 2, which are the upper radiator and the lower radiator, respectively, and the position of the upper radiator trace corresponds to the gap position between the lower radiator traces, and the corresponding lower radiator trace is also located in the gap position between the upper and lower radiator traces. Double-sided printing can reduce the size of the antenna while increasing the signal coverage space, and the traces on either side are in the gap of the other side, avoiding interference and making the magnetic field radiation more uniform.

[0022] Compared with the traditional solution, if you want to achieve uniform magnetic field distribution, high intensity, and improved card recognition height, you have to increase the coil area, thereby increasing the product size. If you want to reduce the size, the corresponding card recognition height is relatively reduced. That is, the size and card recognition height cannot be taken into account at the same time. However, the present application reduces or avoids the use of cables or pin connections through the above structure, especially the use of pads, thereby reducing the size while ensuring the card recognition height.

[0023] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A near-field wireless communication antenna, comprising: The antenna radiator (1) and the antenna PCB board (2) are characterized in that: The antenna radiator (1) is on the antenna PCB board (2), and the routing of the antenna radiator (1) is arranged in a clockwise direction from inside to outside, and the spacing between adjacent routings is greater than 5 mm; the antenna radiator (1) is coiled in a square shape, and the corners are right-angled corners; It also includes: a ferrite (3), a main PCB board (4) and an antenna pad (5); The main PCB board (4), the ferrite (3), and the antenna PCB board (2) are stacked in sequence from bottom to top to form a layered structure; The antenna pad (5) enables the antenna radiator (1) to communicate with the antenna PCB board (2), while fixing the layered structure.

2. The near field wireless communication antenna according to claim 1, characterized in that: The ferrite (3) is mounted on the bottom surface of the antenna PCB board (2).

3. The near field wireless communication antenna according to claim 1, characterized in that: The area of ​​the ferrite (3) is greater than or equal to the area covered by the antenna radiator (1), and less than or equal to the area of ​​the antenna PCB board (2).

4. The near field wireless communication antenna according to claim 1, characterized in that: Also includes: A fixing pad (6) is used to fix the layered structure.

5. The near field wireless communication antenna according to claim 1, characterized in that: The total thickness of the ferrite (3) and the antenna PCB board (2) is 3 mm to 5 mm.

6. The near field wireless communication antenna according to claim 1, characterized in that: When the antenna radiator (1) is coiled, a giving way inclined portion (11) is formed to avoid line overlap, and the giving way inclined portion (11) has an inclination angle of 45°±10°.

7. The near field wireless communication antenna according to claim 6, characterized in that: The starting part of the antenna radiator (1) is located inside the giving way inclined part (11), and the ending part of the antenna radiator (1) is located outside the giving way inclined part (11).

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