Antenna assembly

Abstract

The utility model relates to an antenna assembly, which comprises an antenna structure, a conductive adhesive layer and a shielding layer. The antenna structure is made of a copper-aluminum pressing sheet and comprises an antenna body and a grounding piece. The antenna body is connected with the grounding piece, the first surface of the antenna structure is copper, the second surface of the antenna structure is aluminum, and the antenna body comprises a feed-in part located on the first surface. The conductive adhesive layer is located on the second surface and at least corresponds to the position of the grounding piece. The shielding layer at least covers the antenna body position of the first surface, but exposes the feed-in part. For an antenna structure with large frequency tolerance, the same effect can be achieved through a simpler structure and a more economical manufacturing method.

Description

TECHNICAL FIELD

[0001] The utility model relates to a communication field especially an antenna assembly. BACKGROUND

[0002] The present antenna design, in cooperation with the design specification of electronic device, is usually based on printed circuit board, mainly flexible soft board and traditional glass fiber hard board as the carrier of antenna. The design of antenna usually includes two blocks of antenna body and ground. The antenna body is usually designed on the printed circuit board with other circuits, and the copper layer of the external area of the circuit is used for the part of antenna pattern, and the copper layer left after other processes is used as energy radiation medium. Above the antenna, the solder resist layer of the printed circuit board is used for solder protection, and the antenna pattern is shielded to keep secret and prevent peeping.

[0003] In addition, a metal foil is usually needed on the other side as ground. In order to save cost, aluminum foil or copper foil of multi-layer printed circuit board is commonly used.

[0004] Since not every electronic product needs accurate frequency range for antenna specification, some have high tolerance for frequency range. Under such conditions, the process and structure of printed circuit board, together with dry film design, have high overall cost. SUMMARY

[0005] In order to solve the problems faced by the prior art, an antenna assembly is provided.

[0006] The antenna assembly includes antenna structure, conductive adhesive layer and shielding layer. The antenna structure is made of copper-aluminum laminated sheet and includes antenna body and ground. The antenna body is connected to the ground, wherein the first surface of the antenna structure is copper and the second surface is aluminum, and the antenna body includes a feed-in part on the first surface. The conductive adhesive layer is located on the second surface and corresponds to at least the position of the ground. The shielding layer covers at least the position of the antenna body on the first surface, but exposes the feed-in part.

[0007] Preferably, the shielding layer covers the first surface of the antenna structure and only exposes the feed-in part.

[0008] Preferably, in some embodiments, the shielding layer is located at the outer periphery of the antenna structure.

[0009] Preferably, the shielding layer is green paint, or at least includes polyimide (PI) and carbon black.

[0010] Preferably, the antenna assembly further includes a release film, and the conductive adhesive layer is located between the second surface of the antenna structure and the release film.

[0011] Preferably, the antenna assembly further comprises a support plate, the support plate being fixedly connected to the conductive adhesive layer.

[0012] Preferably, the antenna assembly further comprises an adhesive layer, the support plate being located between the conductive adhesive layer and the adhesive layer.

[0013] Preferably, the antenna assembly further comprises a second release film, the adhesive layer being located between the second release film and the support plate.

[0014] Preferably, the support plate is made of polyethylene terephthalate (PET).

[0015] Preferably, the antenna body further comprises a radiating portion.

[0016] As the above technical solutions are adopted, the present application has the following beneficial effects:

[0017] 1. For an antenna structure with a large frequency tolerance in design specifications, a simpler structure and a more economical manufacturing process can be used to achieve the same effect. Furthermore, a semi-finished product can be pre-made, and a soft board or a hard board structure can be selected according to the actual structure, without the need for additional cooperation with the manufacturing process of a printed circuit board factory, and the delivery time can be more conveniently adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a top view of the first embodiment of the antenna assembly.

[0019] Figure 2 is a bottom view of the first embodiment of the antenna assembly.

[0020] Figure 3 is a sectional view of the first embodiment of the antenna assembly.

[0021] Figure 4 is a top view of the second embodiment of the antenna assembly.

[0022] Figure 5 is a bottom view of the second embodiment of the antenna assembly.

[0023] Figure 6 is a top view of the third embodiment of the antenna assembly.

[0024] Figure 7 is a bottom view of the third embodiment of the antenna assembly.

[0025] Figure 8 is a sectional view of the fourth embodiment of the antenna assembly.

[0026] SYMBOL DESCRIPTION

[0027] 1: antenna assembly

[0028] 10: Antenna structure

[0029] 10 A: First surface

[0030] 10: B: Second surface

[0031] 11: Antenna body

[0032] 111: Feed-in portion

[0033] 113: Radiating portion

[0034] 13: Ground

[0035] 30: Conductive adhesive layer

[0036] 40: Release film

[0037] 80: Shielding layer

[0038] 60: Support plate

[0039] 70: Adhesive layer

[0040] 80: Second release film DETAILED DESCRIPTION

[0041] Figure 1 Figure 1 is a top view of a first embodiment of an antenna assembly. Figure 2 Figure 2 is a bottom view of the first embodiment of the antenna assembly. Figure 3 Figure 3 is a cross-sectional view of the first embodiment of the antenna assembly. In this, Figure 3 along Figure 1 A-A section, and in order to clearly present the corresponding positions, Figure 2 part of the elements are omitted. As shown in Figure 1 , Figure 2 and Figure 3 , the antenna assembly 1 comprises an antenna structure 10, a conductive adhesive layer 30, and a shielding layer 80. The antenna structure 10 is made of a copper-aluminum clad sheet, comprising an antenna body 11 and a ground 13. The antenna body 11 is connected to the ground 13, wherein a first surface 10A of the antenna structure 10 is copper, and a second surface 10B is aluminum. The copper-aluminum clad sheet can be formed by pressing a copper foil and an aluminum foil with a specific thickness. The antenna body 11 comprises a feed-in portion 111 and a radiating portion 113 located on the first surface 10A. The conductive adhesive layer 30 is located on the second surface 10B, corresponding at least to the position of the ground 13. The shielding layer 80 covers the position of the antenna body 11 on the first surface 10A, but exposes the feed-in portion 111, so that the signal feed-in wire is easy to solder. In this case, the copper-aluminum clad sheet is used, mainly considering the soldering effect, and copper is still the best choice.

[0042] In this case, refer to Figure 3, the antenna assembly 1 further comprises a release film 40, and the conductive adhesive layer 30 is located between the second surface 10B of the antenna structure 10 and the release film 40. In addition, the shielding layer 80 is green paint, or at least comprises polyimide and carbon black. In other words, the shielding layer 80 is similar to a conventional printed circuit board, and appears green or black, without showing the shape of the antenna body 10.

[0043] Figure 4 is a top view of a second embodiment of the antenna assembly. Figure 5 is a bottom view of the second embodiment of the antenna assembly. As shown in Figure 4 and Figure 5 , with reference to Figure 1 and Figure 2 , the difference is that the shielding layer 80 covers the entire first surface 10A of the antenna structure 10, and only exposes the feed-in portion 111. In other words, the shielding layer 80 also covers one side of the ground member 13.

[0044] Figure 6 is a top view of a third embodiment of the antenna assembly. Figure 7 is a bottom view of the third embodiment of the antenna assembly. With reference to Figure 4 and Figure 5 , the shielding layer 80 of the third embodiment is further located at the outer periphery of the antenna structure 10, so that the antenna structure 10 forms a structure with the shielding layer 80 as an outer frame.

[0045] In the above-mentioned Figures 1 to 7 structure, only the shielding layer 80 and the copper-aluminum laminated sheet are used as the structure, and the whole is light and thin, similar to a conventional soft board structure. After the release film 40 is removed, the conductive adhesive layer 30 can be attached to the system, so that electromagnetic signals can be conducted.

[0046] Figure 8 is a cross-sectional view of a fourth embodiment of the antenna assembly. With reference to Figure 3 , as shown in Figure 8 , the fourth embodiment does not have a release film 40, and the antenna assembly 1 further comprises a support plate 60. The support plate 60 is bonded and fixed with the conductive adhesive layer 30. In this way, the antenna assembly 1 can form a structure similar to a conventional glass fiber hard board. The support plate 60 can be made of polyethylene terephthalate to provide better rigidity.

[0047] Further, the antenna assembly 1 further comprises an adhesive layer 70, and the support plate 60 is located between the conductive adhesive layer 30 and the adhesive layer 70. In other words, the antenna assembly 1 can be assembled on the system using mounting or pasting. The support plate 80 can also have a gold finger contact, and can be electrically connected to the system mainboard.

[0048] Further, the antenna assembly 1 further comprises a second release film 80, and the adhesive layer 70 is located between the second release film 80 and the support plate 60. This is to facilitate the overall structure when shipping, and when assembled in the system, the second release film 80 is removed.

[0049] In summary, for the antenna structure with large frequency tolerance in design specifications, the same performance can be achieved with simpler structure and more economical process method. Further, the semi-finished product can be pre-made, and the soft plate or hard plate structure can be selected according to the actual structure, without additional cooperation with the process of the printed circuit board factory, and the shipping time can be more convenient.

Claims

1. An antenna assembly, characterized by : An antenna structure made of a copper-aluminum laminate sheet, comprising an antenna body and a ground member, the antenna body being connected to the ground member, wherein a first surface of the antenna structure is copper and a second surface is aluminum, the antenna body comprising a feed-in portion at the first surface; a conductive adhesive layer on the second surface corresponding to at least the location of the ground member; and a shielding layer covering at least the antenna body on the first surface, but exposing the feed-in portion.

2. The antenna assembly of claim 1, wherein The shielding layer covers the first surface of the antenna structure, exposing only the feed-in portion.

3. The antenna assembly of claim 2, wherein The shielding layer further covers the outer periphery of the antenna structure.

4. The antenna assembly of claim 1, wherein The shielding layer is green paint, or at least comprises polyimide and carbon black.

5. The antenna assembly of claim 1, wherein Further comprising a release film, the conductive adhesive layer being between the second surface of the antenna structure and the release film.

6. The antenna assembly of claim 1, wherein Further comprising a support plate, the support plate being bonded to the conductive adhesive layer.

7. The antenna assembly of claim 6, wherein Further comprising an adhesive layer, the support plate being between the conductive adhesive layer and the adhesive layer.

8. The antenna assembly of claim 7, wherein Further comprising a second release film, the adhesive layer being between the second release film and the support plate.

9. The antenna assembly of claim 6, wherein The support plate is made of polyethylene terephthalate.

10. The antenna assembly of claim 1, wherein The antenna body further comprises a radiating portion.

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