TWM584990U - Near-field wireless communication antenna - Google Patents

Abstract

The present invention provides a near-field wireless communication antenna including the following components. The metal layer has a first connection portion, a second connection portion, and a bearing surface. The first connection portion and the second connection portion are spaced apart from each other to form a gap. The first connection portion and the second connection portion are used for respective electrical connection signal feeding. The input end and the ground end, and the bearing surface extends from the first connection portion to the second connection portion. The wave absorbing layer is stacked on one side of the metal layer and has a first surface and a second surface, wherein the second surface faces the bearing surface. The adhesive layer is stacked on one side of the wave absorbing layer and has a bonding surface, wherein the bonding surface faces the first surface.

Description

Near field wireless communication antenna

The invention relates to a near-field wireless communication antenna, in particular to a near-field wireless communication antenna using metal as the antenna body.

With the development of communication technology, near-field communication (NFC) has been widely used in various devices, among which the more common devices are smart phones, as well as notebook computers and tablet computers used with smart phones. Or a smart wearable device. In addition, near-field wireless communication is also used to connect the body of an electric car with a battery device to record the user's position or let the user know the use of the electric car in real time.

At present, most NFC antennas are made of printed circuit boards (PCBs), but printed circuit boards have thickness and width restrictions, which do not meet the trend of lightweight and miniaturization of most modern electronic devices. In addition, when a printed circuit board is manufactured and formed, a complicated board washing process is required, which is not only a long manufacturing time, but also easily causes environmental pollution.

The present invention is to provide a near-field wireless communication antenna to improve the above problems.

The present invention provides a near-field wireless communication antenna, including a metal layer, a wave absorbing layer, and an adhesive layer. The metal layer has a first connection portion, a second connection portion, and a bearing surface. The first connection portion and the second connection portion are spaced apart from each other to form a gap. The first connection portion and the second connection portion are used for respective electrical connection signal feeding. The input end and the ground end, and the bearing surface extends from the first connection portion to the second connection portion. The wave absorbing layer is stacked on one side of the metal layer and has a first surface and a second surface, wherein the second surface faces the bearing surface. The adhesive layer is stacked on one side of the wave absorbing layer and has a bonding surface, wherein the bonding surface faces the first surface.

With the above structure, the near-field wireless communication antenna provided by the present invention has an unlimited width and thickness because the antenna body is made of metal. Compared with printed circuit boards, it can be widely used in different electronic devices. In addition, since the metal antenna processing process does not require chemical etching, and the manufacturing process is simpler than the printed circuit board, the manufacturing time can be effectively shortened, and the effect of reducing environmental pollution can be achieved.

The above description of the contents of this disclosure and the description of the following embodiments are used to demonstrate and explain the spirit and principle of the new model, and provide a further explanation of the scope of the patent application of the new model.

The detailed features and advantages of the new model are described in detail in the following embodiments. The content is sufficient for any person skilled in the art to understand and implement the technical content of the new model. According to the content disclosed in this specification, the scope of patent applications and the drawings Anyone skilled in related arts can easily understand the purpose and advantages of this new type. The following examples further illustrate the viewpoints of the present invention in detail, but do not limit the scope of the present invention in any way.

Please refer to FIG. 1 and FIG. 2. FIG. 1 is an exploded perspective view of a near-field wireless communication antenna 1 according to an embodiment of the present invention. FIG. 2 is a top view of a near-field wireless communication antenna 1 according to an embodiment of the present invention. An embodiment of the near-field wireless communication antenna 1 includes a metal layer 11, a wave absorbing layer 12, and an adhesive layer 13, or further includes a cable C and a housing S. In addition, in another embodiment, the near-field wireless communication antenna 1 further includes a reinforcing plate 14.

As shown in FIG. 1, the metal layer 11 has a first connection portion 111, a second connection portion 112, and a bearing surface 113. The first connection portion 111 and the second connection portion 112 are spaced apart from each other to form a gap 114. A connecting portion 111 extends to the second connecting portion 112, wherein the first connecting portion 111 is used for receiving a feed signal, and the second connecting portion 112 is used for grounding. In detail, the metal layer 11 is an antenna body of a wireless communication antenna, and has wiring thereon, which can be realized in a non-closed loop shape and disposed on the housing base S. For example, when the shape of the metal layer 11 is a quadrangle, a first connection portion 111 and a second connection portion 112 may be disposed on one side thereof, and the first connection portion 111 and the second connection portion 112 may be separated from each other by a gap 114. Open to form the aforementioned non-closed loop. In addition, when the cable C is provided, the first connection portion 111 is electrically connected to the signal feeding end of the cable C to receive the feeding signal, and the second connection portion 112 is electrically connected to the ground network layer of the cable C. For grounding. Therefore, the feeding signal can be input to the metal layer 11 from the signal feeding end of the cable C, and can be output from the ground network layer after passing through the metal layer 11 extending in a ring shape. In practice, the metal layer 11 is integrally formed by stamping. In addition, the metal layer 11 may be made of copper or a copper alloy, but is not limited thereto. On the other hand, the thickness of the metal layer 11 can be adjusted according to actual needs, and there is no particular limitation.

The wave absorbing layer 12 is stacked on one side of the metal layer 11 and has a first surface 121 and a second surface 122, wherein the second surface 122 faces the bearing surface 113. In short, the absorbing layer 12 needs to cover the extended wiring path of the metal layer 11 so that the electrical signals in the metal layer 11 can be stably transmitted. Therefore, the shape of the wave absorbing layer 12 may be similar to that of the metal layer 11, for example, it may be a non-closed ring or a closed ring, and may at least cover the bearing surface 113 between the first connection portion 111 and the second connection portion 112. In practice, the wave absorbing layer 12 can be made of ferrite, but not limited thereto. In addition, as shown in FIG. 1, the wave absorbing layer 12 can further form an opening 123, but the detailed structure thereof will be described in detail later.

The adhesive layer 13 is stacked on one side of the wave absorbing layer 12 and has a bonding surface 131. The bonding surface 131 faces the first surface 121. In detail, the adhesive layer 13 may be disposed on the wave absorbing layer 12 and located on a side different from the metal layer 11 to protect the structures of the wave absorbing layer 12 and the metal layer 11 and provide waterproof and anti-oxidation functions. In one embodiment, the bonding surface 131 of the adhesive layer 13 completely covers the first surface 121 of the wave absorbing layer 12 to completely protect the structure of the wave absorbing layer 12 and the metal layer 11. It is worth mentioning that, compared with antennas made of printed circuit boards, because this creation is made of a metal body (such as a copper series) with a better material strength and a lower conductivity, for example, the metal layer 11 The width of the side can be greatly reduced, thereby saving the amount of the adhesive layer 13 and effectively reducing the manufacturing cost.

The reinforcing plate 14 is coupled to a surface of the metal layer 11 that is different from the bearing surface 113, and the reinforcing plate 14 connects the first connection portion 111 and the second connection portion 112. In detail, because there is a gap 114 between the first connection portion 111 and the second connection portion 112, during the process of assembling the metal layer 11 that has been welded with the cable C to the housing S, it may be When the relative distance between a connecting portion 111 and the second connecting portion 112 is changed by the external force of the assembly, the welding structure between the first connecting portion 111, the second connecting portion 112, and the cable C is broken. In addition, since the portion of the cable C welded to the first connection portion 111 and the second connection portion 112 is exposed to the housing S, the welding structure between the first connection portion 111, the second connection portion 112, and the cable C has With sufficient strength, when the cable C is pulled by a large external force during use, the structures of the first connection portion 111 and the second connection portion 112 may be damaged. Therefore, by combining the reinforcing plate 14 on one side of the first connection portion 111 and the second connection portion 112, the mechanical structure can be effectively strengthened to improve the durability of the near-field wireless communication antenna 1. In an embodiment, the reinforcing plate 14 has two fixing holes 141 and 142, and the first connecting portion 111 has a first positioning hole 111a, and the second connecting portion 112 has a second positioning hole 112a. The first positioning hole 111a and The fixing hole 141 is opposite to each other, and the second positioning hole 112 a is opposite to the fixing hole 142. In brief, through the first positioning hole 111a, the second positioning hole 112a, and the two fixing holes 141 and 142 on the reinforcing plate 14, the first connection portion 111 and the second connection portion 112 of the metal layer 11 can be sequentially connected. The reinforcing plate 14 is combined with each other through a plurality of positioning members, and is disposed on the shell seat S after being combined with each other. In practice, the wave absorbing layer 12 may also have two positioning holes opposite to the first positioning hole 111a and the second positioning hole 112a, and the positioning member may be a hot-melt column on the shell seat S, and the hot-melt column After sequentially passing through the two fixing holes 141 and 142 of the reinforcing plate 14, the first positioning holes 111a and the second positioning holes 112a of the metal layer 11, and the wave absorbing layer 12, the thermal fusion column is first heated and then cooled. After melting, it is shaped to fasten the wave absorbing layer 12, the metal layer 11 and the reinforcing plate 14 on the shell seat S, but this embodiment is not limited thereto.

Please refer to FIG. 3 and FIG. 4. FIG. 3 is a partially enlarged top view of the near-field wireless communication antenna 1 according to an embodiment of the present invention without the adhesive layer 13. FIG. 4 is a partially enlarged top view of the near-field wireless communication antenna 1 according to another embodiment of the present invention without the adhesive layer 13. As shown in FIGS. 3 and 4, the opening 123 of the wave absorbing layer 12 is opposite to the first connection portion 111 and the second connection portion 112 of the metal layer 11. In detail, the opening 123 may be a C-shaped fracture (see FIG. 3) that forms the wave absorbing layer 12, or may be a structure that is recessed inward only by the outer side of the wave absorbing layer 12 (see FIG. 4).

Please continue to refer to FIG. 3, in a case where the cable C is electrically connected to the first connection portion 111 and the second connection portion 112 respectively, the first connection portion 111 includes a signal feed of the first contact region 111 b and the cable C The input terminal is connected, and the second connection portion 112 includes a second contact area 112b connected to the ground network layer of the cable C. In addition, the opening 123 is preferably not only opposed to the first connection portion 111 and the second connection portion 112, but also when the first contact area 111b and the second contact area 112b are located on the bearing surface 113, the opening 123 is provided for the first connection The dot region 111b and the second contact region 112b are exposed from the wave absorbing layer 12. With the above-mentioned structure, although the solder in the first contact region 111b and the second contact region 112b may have a less smooth surface than the bearing surface 113, the state of attachment of the wave absorbing layer 12 and the metal layer 11 is still convenient. It is not affected by the solder in the first contact region 111b and the second contact region 112b, so that the wave absorbing layer 12 and the metal layer 11 can have a better degree of adhesion.

Please continue to refer to FIG. 4. The opening 123 in this embodiment is recessed from the first side 125 (outer side) toward the second side 126 (inner side) of the absorbing layer 12. A bonding portion 124 is further formed between 123 and the second side 126, wherein the bonding portion 124 is offset from the first contact area 111b and the second contact area 112b, and the bonding portion 124 may also partially cover the gap 114. In detail, the wave absorbing layer 12 having the joint portion 124 can maintain a closed loop shape, and can withstand a large external force during assembly. It is worth mentioning that on the premise that "the first contact region 111b and the second contact region 112b are exposed to the absorbing layer 12", the length, width, and shape of the opening 123 in FIG. 3 and FIG. The features such as the position of the joint portion 4 of 4 can be changed according to actual needs, and all are within the protection scope of this creation. In addition, even if the absorbing layer 12 does not have an opening 123, meaning that the absorbing layer 12 covers the cable C in the first contact region 111b and the second contact region 112b, only the metal layer 11 and the absorbing layer will be reduced. The closeness between 12 and 12 does not affect the normal operation of the near field wireless communication antenna 1.

In addition, please continue to refer to FIG. 3. The gap 114 extends along an extension direction GD to separate the first connection portion 111 and the second connection portion 112, and a cable routing direction RD passes through the center position of the first contact area 111b and the center position of the second contact area 112b. , Where the extending direction GD and the cable routing direction RD are not parallel to each other. In detail, when the first connecting portion 111 and the second connecting portion 112 are two rectangles arranged at intervals as shown in FIG. 3 and the gap 114 is defined by the two opposite sides of the two rectangles, the extending direction GD and the cable The layout directions RD are preferably perpendicular to each other. On the other hand, as shown in FIG. 4, when the first connection portion 111 and the second connection portion 112 are two triangles spaced apart, and the gap 114 is defined by the two oblique sides of the two triangles, the extending direction GD and the cable The included angle of the layout direction RD is preferably greater than 45 degrees. In addition, the first connecting portion 111 has one side 111c facing away from the gap 114, and an included angle between the cable routing direction RD and the side 111c is between 60 degrees and 90 degrees, and preferably 90 degrees.

For example, when the included angle between the extension direction GD and the cable routing direction RD is greater than 45 degrees, since the first contact area 111b and the second contact area 112b have sufficient welding area in the extension direction GD, they are located at The cable C on the metal layer 11 can be linearly extended and welded to the first connection portion 111 and the second connection portion 112. Conversely, when the above-mentioned included angle is less than 45 degrees (for example, the extending direction GD and the cable routing direction RD are close to parallel), because the areas of the first contact area 111b and the second contact area 112b in the extending direction GD are opposite to each other. Since the ground is reduced, it is difficult for the cable C to directly extend in a straight line shape and be welded to the first connection portion 111 and the second connection portion 112. In other words, the cable C on the metal layer 11 must have a zigzag bent shape, or the ground network layer of the cable C must be broadcasted away and formed into a Y shape with the signal input end (ie, the core wire). Only by being welded to the first connection portion 111 and the second connection portion 112 more firmly, thereby increasing labor costs and manufacturing time, and also causing more weaknesses in structural strength. On the other hand, when the cable C is welded to the metal layer 11 in a bent manner and an angle is formed between the cable routing direction RD and the side edge 111c, its mechanical strength is reduced due to the bent structure. In order to maintain the mechanical strength of the cable C within a tolerable range, the angle between the cable routing direction RD and the side 111c needs to be between 60 and 90 degrees. On the other hand, when the included angle between the cable routing direction RD and the side 111c is 90 degrees (or approaching 90 degrees), the cable C has almost no bent structure, so it can maintain the optimal mechanical strength.

In summary, the near-field wireless communication antenna provided by the new model, because the antenna body is made of metal, has unlimited width and thickness, and can be widely used in different electronic devices than printed circuit boards. In addition, since the metal antenna processing process does not require chemical etching, and the manufacturing process is simpler than the printed circuit board, the manufacturing time can be effectively shortened, and the effect of reducing environmental pollution can be achieved.

Although the present invention is disclosed as above with the foregoing embodiments, it is not intended to limit the present invention. Without departing from the spirit and scope of the new model, changes and retouching are within the scope of patent protection of the new model. For the protection scope defined by this new model, please refer to the attached patent application scope.

1‧‧‧Near-field wireless communication antenna
11‧‧‧ metal layer
111‧‧‧first connection
111a‧‧‧first positioning hole
111b‧‧‧First contact area
111c‧‧‧ side
112‧‧‧Second connection section
112a‧‧‧Second positioning hole
112b‧‧‧Second Contact Area
113‧‧‧bearing surface
114‧‧‧ Clearance
12‧‧‧ absorbing layer
121‧‧‧ the first surface
122‧‧‧Second surface
123‧‧‧ opening
124‧‧‧Joint
125‧‧‧ the first side
126‧‧‧ second side
13‧‧‧ Adhesive layer
131‧‧‧ Fitting surface
14‧‧‧ Reinforcing board
141, 142‧‧‧Fixing holes
C‧‧‧cable
S‧‧‧shell
GD‧‧‧ extension direction
RD‧‧‧Cable routing direction

FIG. 1 is an exploded perspective view of a near field wireless communication antenna according to an embodiment of the present invention.
FIG. 2 is a top view of a near-field wireless communication antenna according to an embodiment of the present invention.
FIG. 3 is a partially enlarged top view of a near field wireless communication antenna without an adhesive layer according to an embodiment of the present invention.
FIG. 4 is a partially enlarged top view of a near-field wireless communication antenna without an adhesive layer according to another embodiment of the present invention.

Claims (11)

A near-field wireless communication antenna includes a metal layer having a first connection portion, a second connection portion, and a bearing surface. The first connection portion and the second connection portion are spaced apart from each other to form a gap. The surface extends from the first connection portion to the second connection portion, wherein the first connection portion is used to receive an input signal, and the second connection portion is used to ground; a wave absorbing layer is stacked on the metal layer One side has a first surface and a second surface, wherein the second surface faces the bearing surface; and an adhesive layer is stacked on one side of the absorbing layer and has a bonding surface, wherein the bonding The surface is oriented toward the first surface. The near-field wireless communication antenna according to claim 1, wherein the wave absorbing layer further includes an opening, and the opening is opposite to the first connection portion and the second connection portion. The near-field wireless communication antenna according to claim 2, wherein the opening forms a fracture in the absorbing layer, and the fracture is opposite to the first connection portion and the second connection portion. The near-field wireless communication antenna according to claim 2, wherein the first connection part is electrically connected to the signal feeding end and forms a first contact area, and the second connection part is electrically connected to the ground end and forms A second contact area. When the first contact area and the second contact area are located on the bearing surface, the first contact area and the second contact area are exposed to the wave absorbing layer. The near-field wireless communication antenna according to claim 4, wherein the absorbing layer has a first side and a second side facing away from each other, and the opening is directed from the first side toward the second side Recessed, and a joint portion is formed on the second side, wherein the joint portion is offset from the first contact area and the second contact area. The near-field wireless communication antenna according to claim 1, further comprising a reinforcing plate coupled to a surface of the metal layer different from the bearing surface, and the reinforcing plate is connected to the first connection portion and the second connection portion. The near-field wireless communication antenna according to claim 6, wherein the reinforcing plate has two fixing holes, and the first connecting portion has a first positioning hole, and the second connecting portion has a second positioning hole, wherein the first A positioning hole is opposite to one of the two fixing holes, and the second positioning hole is opposite to the other of the two fixing holes. The near-field wireless communication antenna according to claim 1, wherein the gap extends along an extension direction to separate the first connection portion and the second connection portion, and the first connection portion and the second connection portion further include A cable routing direction passes through the center position of the first contact area and the center position of the second contact area, wherein the extension direction and the cable routing direction are not parallel to each other. The near-field wireless communication antenna according to claim 8, wherein an included angle between the extending direction and the cable routing direction is greater than 45 degrees. The near-field wireless communication antenna according to claim 9, wherein an included angle between the cable routing direction and one side of the absorbing layer is between 60 degrees and 90 degrees. The near-field wireless communication antenna according to claim 1, wherein the bonding surface completely covers the first surface.