TWM446424U - Separate thin antenna - Google Patents

Description

Separate thin antenna

This creation is related to the antenna, and more specifically refers to a separate thin antenna.

With the advancement of wireless communication technology, wireless transmission technologies such as Radio Frequency IDentification (RFID) and Near Field Communication (NFC) are becoming more and more popular in various fields, and wireless transmission technology can be popularized. The reason is mainly due to the thin design of the antenna used, so that the antenna can be installed in objects of various sizes or shapes.

A known thin antenna usually has its antenna circuit and a guiding circuit printed on a flexible printed circuit (FPC) to achieve a thinning and flexible effect. In order to avoid interference or short circuit between the antenna circuit and the guiding circuit, the known thin antenna usually has its antenna circuit and the guiding circuit printed on the double-layer or multi-layer flexible printed circuit board to avoid the above. The situation occurs. However, in order to facilitate the placement of the thin antenna in the object and the connection with the corresponding signal source, the shape is usually designed to be in the shape of a long strip, so that the thin antenna can be double-layered or multi-layered in mass production. After the flexible printed circuit board is disposed with the antenna circuit and the conductive circuit, it is usually necessary to cut the shape into the irregular shape described above, and the excess sheet material under cutting is usually not reused and discarded. As a result, the utilization rate of the sheet at the time of manufacture is lowered, thereby causing waste of production costs.

Based on the above, it can be known that the design of the thinned antenna is still not perfect, and there is still room for improvement.

In view of this, the main purpose of the present invention is to provide a separate thin antenna, which utilizes the structural design of the separate assembly to achieve the purpose of improving the utilization rate of the board during manufacturing, thereby greatly reducing the manufacturing cost.

In order to achieve the above object, the split thin antenna provided by the present invention comprises a first flexible printed circuit (FPC) having at least two first contacts and an antenna circuit printed thereon. And the antenna circuit is connected to the two first contacts; and a second flexible printed circuit board having at least two second contacts and a guiding circuit printed thereon, the guiding circuit and the guiding circuit The two first contacts are connected, and each of the second contacts is respectively connected to each first contact of the first flexible printed circuit board.

In one embodiment, the first flexible printed circuit board and the second flexible printed circuit board have a single-layer board structure.

In one embodiment, a magnetic conductive patch is further disposed on the first flexible printed circuit board.

In one embodiment, an adhesive is included to connect the first flexible printed circuit substrate to the second flexible printed circuit substrate.

In an embodiment, the second flexible printed circuit board has a first end portion and a second end portion disposed opposite to each other, and the second end portion is printed on the first end portion, and the second Two second contacts are printed on the two ends, wherein the second contacts are connected to one end of the guiding circuit, and the third contacts are connected to the other end of the guiding circuit .

In an embodiment, the third contacts are electrically connected to a signal source.

In an embodiment, the signal source is a smart card card holder having a C1~C8 contact conforming to the ISO 7816 standard, and the two third contacts are respectively connected to the C4 and C8 contacts of the smart card holder. connection.

In an embodiment, the first flexible printed circuit board has a first surface and a second surface, and the first contacts and the antenna circuit are printed on the first surface; the second surface is Insulating material, and the second surface corresponding to the first contact has a conductive via, each of the conductive vias is provided with a conductive material, and the first contacts are respectively connected to the respective conductive materials. The second contact.

In an embodiment, the second flexible printed circuit board has a first surface and a second surface, and the second contacts and the conductive circuit are printed on the first surface; the second surface An insulating material, and the second surface corresponding to the second contact has a conductive via, wherein each of the conductive vias is provided with a conductive material, and the second contacts are respectively connected to the conductive materials. The first contact.

In one embodiment, the first flexible printed circuit board has a concave arc near the side of the second flexible printed circuit board, and the concave arc is in contact with the second flexible printed circuit board.

Therefore, by designing the antenna circuit and the conductive circuit separately on the single-layer flexible printed circuit board, the purpose of improving the utilization rate of the board during manufacturing can be achieved, and the manufacturing cost can be greatly reduced.

In order to explain the present invention more clearly, the preferred embodiment will be described in detail with reference to the drawings.

Referring to FIG. 1 and FIG. 2, the split thin antenna of the preferred embodiment includes a first flexible printed circuit (FPC) 10 and a second flexible printed circuit substrate 30, wherein :

Referring to FIG. 3, the first flexible printed circuit board 10 has a single-layer board structure and is rectangular and foldable and bendable. The first flexible printed circuit board 10 has a first surface 10a and a second surface 10b. The first surface 10a has four first contacts A1 to A4 and an antenna circuit 20 printed thereon. The antenna circuit 20 is connected to two of the first contacts A2 and A3. The second surface 10b is made of an insulating material.

Referring to FIG. 4 and FIG. 5 , the second flexible printed circuit board 30 has a single-layer board structure and is elongated and foldable and bendable. The second flexible printed circuit board 30 has a first The first end portion 31 and the second end portion 32 are oppositely disposed on the first surface 30a, and the second end portion B1 is printed on the first surface 30a. ~B4, and the second end portion 32 is provided with two third contacts C on the first surface 30a, and on the first surface 30a A guiding circuit 40 is disposed between the first end portion 31 and the second end portion 32. One end of the guiding circuit 40 is connected to two of the second contacts B2 and B3, and the other end is connected. The two third contacts C are connected. The second surface 30b is made of an insulating material, and each of the second contacts 30b has a conductive via 33 corresponding to each of the second contacts B1 to B4. Each of the conductive vias 33 is provided with a conductive material 331, and each of the conductive holes The material 331 is connected to the corresponding second contacts B1 to B4.

Thereby, the first flexible printed circuit 10 and the second flexible printed circuit 30 are fixedly connected by connecting the first contacts A1 to A4 to the second contacts B1 to B4. The conductive circuit 40 is electrically connected to the antenna circuit 20 through the corresponding first contact A2, A3 and the second contact B2, B3. In this embodiment, referring to FIG. 6 , the first contacts A1 A A4 are connected to the second contacts B1 B B4 by soldering with the conductive materials 331 , but not limit. In addition, in this embodiment, the first surface 10a of the first flexible printed circuit 10 is connected to the second surface 30b of the second flexible printed circuit 30, and the benefit of the design is obtained. The situation in which the antenna circuit 20 on the first flexible printed circuit 10 and the conductive circuit 40 of the first flexible printed circuit 30 are short-circuited can be avoided.

After the connection is completed, referring to FIG. 7, the third contact C can be electrically connected to a signal source 100, and the signal of the signal source 100 can be transmitted to the antenna circuit 20 through the guiding circuit 40. For wireless signal transmission or reception. In this embodiment, the signal source 100 is a smart card holder having a C1~C8 contact conforming to the ISO 7816 standard, and the two third contacts are respectively associated with the smart card. The C4 and C8 contacts of the Huika card holder are connected, but not limited to this. In addition to connecting with the smart card card holder, the signal can be electrically connected to other signal sources according to the set field or environment.

Through the above-mentioned separation type and single-layer board design, the separate thin type antenna can be distributed and cut into the respective first flexible printed circuit boards 10 and each of the first and second sheets in the manufacturing process. The shape of the second flexible printed circuit board 30 can greatly reduce the excess sheet material to be cut, thereby improving the utilization rate of the board during manufacturing, thereby greatly reducing the manufacturing cost.

In addition, in order to enable the first flexible printed circuit 10 to be more stably connected to the second flexible printed circuit 30, the first flexible printed circuit substrate 10 and the second flexible printed circuit substrate 30 An adhesive 50 is disposed between the first flexible printed circuit substrate 10 and the second flexible printed circuit substrate 30 to avoid the first flexible printed circuit substrate 10 and the second flexible printed circuit. When the circuit board 30 is connected, looseness occurs. In the present embodiment, the adhesive 50 is a UV-curable adhesive (UV adhesive), which has the advantage of not requiring heating, and only needs to be irradiated with ultraviolet light to achieve the purpose of curing, thereby greatly reducing the circuit line damage or failure caused by overheating. The chance. Of course, in addition to the use of UV-curable adhesives, other adhesives can be used instead of other environments.

Furthermore, the first flexible printed circuit board 10 has a concave arc 12 near the second flexible printed circuit board 30, and the concave arc 12 is connected to the second flexible printed circuit board 30. The purpose of the above design is to disperse the second flexible printed circuit board 30 when the second flexible printed circuit board 30 is flexed The substrate 30 applies a pressure to the edge of the first flexible printed circuit board 10 so that the first flexible printed circuit board 10 is not damaged by the pressure, thereby greatly enhancing the first flexible printed circuit board. 10 lifetime.

In addition to the above structure, the split thin antenna of the present invention further includes a magnetic conductive patch 60 disposed on the first flexible printed circuit substrate 10, which is a magnetically permeable material with high magnetic permeability and low magnetic loss. In addition, the antenna circuit 20 can be prevented from being interfered by metal or other interference sources, and the first flexible printed circuit 10 can be more stably printed with the second flexible printed circuit 10 by coating. Circuit 30 is connected.

In addition to the above configuration, as shown in FIG. 8 and FIG. 9, the second surface 70b of the first flexible printed circuit board 70 is provided with a via hole 72 connected to the first contact A'. The conductive material 721 and the second flexible material in the via hole 72 are made to be connected to the second surface 70b of the first flexible printed circuit board 70 and the first surface 75a of the second flexible printed circuit board 75. The second contact B' of the first surface 75a of the printed circuit board 75 is connected; or as shown in FIG. 10 and FIG. 11, is disposed on the second surface 80b of the first flexible printed circuit board 80. a via hole 82 connected to the contact point A", and a via hole 87 connected to the second contact B" is disposed on the second surface 85b of the second flexible printed circuit board 85, and is transmitted through the first flexible printed circuit The second surface 80b of the substrate 80 is in contact with the second surface 85b of the second flexible printed circuit board 85, and the conductive materials 821 and 871 of the conductive vias 82 and 87 are connected to each other. A" is electrically connected to the second contacts B" and has the effect of preventing short circuits.

It is worth mentioning that the smart card slot on the market is not the direction of the unified specification for the smart card to be inserted. Therefore, in order to solve the above problems, the separate thin antenna of the present invention can also be provided according to different smart card slots. The second flexible printed circuit board of the specification, as shown in FIGS. 12A to 12C, can be applied to smart card slots in different directions.

It should be noted that, in the above structure, the first flexible printed circuit 10 and the second flexible printed circuit 30 are mainly soldered to the four first contacts A1 to A4 and the four second connections. Points B1 to B4 are used for the purpose of fixing, but the contacts printed on the first flexible printed circuit 10 and the second flexible printed circuit 30 are not limited to four, and may be printed only. Two, or other uses as needed to achieve the same purpose. In addition, the above description is only for the preferred embodiment of the present invention, and equivalent structural changes that are applied to the present specification and the scope of the patent application are included in the scope of the patent.

10‧‧‧First flexible printed circuit board

10a‧‧‧ first side

10b‧‧‧ second side

A1~A4‧‧‧ first contact

12‧‧‧ concave arc

20‧‧‧Antenna circuit

30‧‧‧Second flexible printed circuit board

30a‧‧‧ first side

30b‧‧‧ second side

31‧‧‧ first end

B1~B4‧‧‧second contact

32‧‧‧second end

C‧‧‧ third joint

33‧‧‧through holes

331‧‧‧Electrical materials

40‧‧‧Connected circuit

50‧‧‧Viscos

60‧‧‧Magnetic patch

70‧‧‧First flexible printed circuit board

70b‧‧‧ second side

72‧‧‧through holes

721‧‧‧Electrical materials

75‧‧‧Second flexible printed circuit board

75a‧‧‧ first side

80‧‧‧First flexible printed circuit board

85b‧‧‧ second side

82‧‧‧through holes

821‧‧‧Electrical materials

85‧‧‧Second flexible printed circuit board

85b‧‧‧ second side

87‧‧‧through hole

871‧‧‧Electrical materials

100‧‧‧Signal source

C1~C8‧‧‧ contacts

FIG. 1 is a circuit connection diagram of a separate thin antenna.

FIG. 2 is an exploded view of the split thin antenna of the present invention.

3 is a perspective view of the first flexible printed circuit board of the present invention.

4 is a perspective view of the second flexible printed circuit board of the present invention.

Figure 5 is a cross-sectional view taken along line 5-5 of Figure 4.

Fig. 6 is a cross-sectional view showing the split thin antenna of the present invention.

Figure 7 reveals that the inventive split thin antenna is connected to the smart card holder.

Figure 8 is an exploded view of the split thin antenna of the second embodiment of the present invention

Figure 9 is a cross-sectional view of Figure 8.

Figure 10 is an exploded view of the split thin antenna of the third embodiment of the present invention

Figure 11 is a cross-sectional view of Figure 10.

12A to 12C are second flexible printed circuit boards of different configurations.

10‧‧‧First flexible printed circuit board

A1~A4‧‧‧ first contact

12‧‧‧ concave arc

20‧‧‧Antenna circuit

30‧‧‧Second flexible printed circuit board

31‧‧‧ first end

B1~B4‧‧‧second contact

32‧‧‧second end

C‧‧‧ third joint

40‧‧‧Connected circuit

50‧‧‧Viscos

60‧‧‧Magnetic patch

Claims (10)

A split type thin antenna comprising: a first flexible printed circuit board having at least two first contacts and an antenna circuit printed thereon, and the antenna circuit is connected to the two first contacts And a second flexible printed circuit board having at least two second contacts and a guiding circuit printed thereon, the guiding circuit is electrically connected to the two first contacts, and each of the second The contacts are respectively connected to respective first contacts of the first flexible printed circuit board. The split thin antenna according to claim 1, wherein the first flexible printed circuit board and the second flexible printed circuit board have a single-layer board structure. The split thin antenna according to claim 1, further comprising a magnetic conductive patch disposed on the first flexible printed circuit board. The split thin antenna of claim 1, comprising an adhesive connecting the first flexible printed circuit board and the second flexible printed circuit board. The split thin antenna of claim 1, wherein the second flexible printed circuit board has a first end portion and a second end portion oppositely disposed on the first end portion a second contact, wherein the second end is printed with two third contacts, wherein the second contacts are connected to one end of the guiding circuit, and the third contacts are The other end of the guiding circuit is connected. The split thin antenna of claim 5, wherein the third contacts are electrically connected to a signal source. The split type thin antenna according to claim 6, wherein the signal source is a smart card card seat having a C1~C8 contact conforming to the ISO 7816 standard, the second The third contacts are respectively connected to the C4 and C8 contacts of the smart card holder. The split-type thin antenna of claim 1, wherein the first flexible printed circuit board has a first surface and a second surface, and the first contacts and the antenna circuit are printed on the first The second surface is an insulating material, and the second surface has a conductive via corresponding to the first contact, and each of the conductive vias is provided with a conductive material, and the first contacts and the respectively The corresponding second contact is connected through each of the conductive materials. The split thin antenna of claim 1, wherein the second flexible printed circuit board has a first surface and a second surface, and the second contacts and the conductive circuit are printed on the first a second surface is an insulating material, and the second surface has a via hole corresponding to the second contact, each of the conductive vias is provided with a conductive material, and the second contacts are The corresponding first contact is connected through each of the conductive materials. The split thin antenna of claim 1, wherein the first flexible printed circuit board has a concave arc near the side of the second flexible printed circuit board, and the concave arc and the second flexible The printed circuit board is grounded.