Tablet computer cavity antenna and tablet computer

Abstract

The utility model discloses a tablet personal computer cavity antenna, which comprises a feeder line, an excitation part and a cavity part, the cavity part comprises a first surface, a folding connection surface and a second surface, a plurality of side edges of the first surface are connected with the second surface through the folding connection surface, the second surface is electrically connected with a metal back plate of a tablet personal computer, and the metal back plate of the tablet personal computer is electrically connected with the excitation part. The first surface, the turnover connecting surface and the metal back plate enclose to form a resonant cavity, the excitation part is arranged on the opening side of the resonant cavity, and the feeder line is electrically connected with the excitation part. The utility model also discloses a tablet computer using the tablet computer cavity antenna. According to the utility model, the-5db antenna radiation efficiency requirement of the tablet computer with the metal frame and the backboard can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cavity antenna and a tablet computer and belongs to the technical field of antenna. BACKGROUND

[0002] Now the tablet computer tends to the full metal of shell, not only the heat dissipation performance is good, the appearance is relatively beautiful, its hand feeling is also metal texture. Therefore, the environment of whole machine is a great test to the antenna radiation performance. The cavity antenna is a kind of electromagnetic wave input to the cavity, and the resonance is used to enhance the radiation ability of electromagnetic wave. The cavity antenna can usually be divided into two categories of resonant antenna and slot antenna. The cavity of resonant cavity antenna is hollow, can be regarded as an open metal box, usually adopts rectangular, circular or oval shape. And the slot antenna is in the metal plate slot, equivalent to carving a small cavity in the metal plate, and the electromagnetic wave is radiated through the slot.

[0003] Although the cavity antenna has the advantages of high gain, wide bandwidth, strong anti-interference ability, etc., but due to the full metal frame of the tablet computer and the clearance area of only 5mm at the edge of the screen, the traditional cavity antenna design structure is difficult to meet the requirements of antenna radiation efficiency. UTILITY MODEL CONTENT

[0004] In view of the defects of the prior art, the utility model provides a tablet computer cavity antenna, which aims to improve the antenna radiation efficiency of the tablet computer with full metal frame and back plate. The utility model also provides a tablet computer using the tablet computer cavity antenna.

[0005] The technical scheme of the utility model is as follows: a tablet computer cavity antenna, comprising a feed line, an excitation part and a cavity part, the cavity part comprises a first surface, a folded connecting surface and a second surface, a plurality of side edges of the first surface are connected with the second surface through the folded connecting surface, the second surface is electrically connected with the metal back plate of the tablet computer, the first surface, the folded connecting surface and the metal back plate form a resonant cavity, the excitation part is arranged at the opening side of the resonant cavity, and the feed line is electrically connected with the excitation part.

[0006] Further, the second surface and the metal back plate of the tablet computer are electrically connected through a plurality of conductive foam.

[0007] Further, a plurality of through holes are arranged on the first surface. By filling the through holes, the size of the cavity can be adjusted to achieve the purpose of tuning.

[0008] Further, the first surface is provided with a first groove, the feed line is arranged along the first groove, the excitation part is provided with a second groove, and the electrical connection point of the feed line and the excitation part is located in the second groove.

[0009] Further, a support is fixedly connected to the metal back plate of the tablet computer, and the excitation part and the cavity part are arranged on the support.

[0010] Further, the excitation part and the cavity part are processed on the support through an LDS process.

[0011] Another technical solution of the utility model provides a tablet computer comprising the tablet computer cavity antenna.

[0012] Compared with the prior art, the technical solution has the advantages that:

[0013] The utility model uses a metal back plate as part of the resonant cavity of the cavity antenna, reduces the volume, and can realize the radiation of the antenna by using the small size clearance of the screen edge, and can meet the-5db antenna radiation efficiency of the tablet computer with a metal frame and a back plate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 Fig. 1 is a structural schematic diagram of a tablet computer.

[0015] Fig. 2 Fig. 2 is a structural schematic diagram of a tablet computer comprising a tablet computer cavity antenna of an embodiment (without a screen).

[0016] Fig. 3 Fig. 3 is a front structural schematic diagram of a tablet computer cavity antenna of an embodiment (without a metal back plate).

[0017] Fig. 4 Fig. 4 is a back structural schematic diagram of a tablet computer cavity antenna of an embodiment (without a metal back plate). DETAILED DESCRIPTION

[0018] The utility model will be further described below in combination with embodiments, and it should be understood that these embodiments are only used for describing the utility model and are not used for limiting the scope of the utility model, and after reading the description, various equivalent modifications of the skilled in the art to the description all fall within the range defined by the claims attached to the present application.

[0019] Please combine Figs. 1 to 4 Fig. 1, the tablet computer of the embodiment comprises a frame 1, a back plate 2 and a screen 3, wherein the frame 1 and the back plate 2 are both made of metal materials. Two tablet computer cavity antennas are arranged in the tablet computer, which are used for 2.4G and 5G communication respectively. In order to avoid mutual interference between the two tablet computer cavity antennas for different frequencies, the distance between the two is controlled at about 100mm.

[0020] The following takes the cavity antenna of the tablet computer of 2.4G communication as an example to illustrate the composition of the antenna, which mainly includes a feed line 4, an excitation part 5 and a cavity part 6, and the metal back plate 2 of the tablet computer is also a part of the antenna.

[0021] The cavity part 6 and the excitation part 5 are processed on the surface of the plastic support 7 by the LDS process, and the plastic support is fixedly connected to other intermediate components of the metal back plate by screws to form a fixed connection with the metal back plate.

[0022] The cavity part includes a first face 601, a folded connecting face 602 and a second face 603, wherein the first face 601 is a face of the plastic support 7 facing the screen 3 of the tablet computer, and the second face 603 is a face of the plastic support 7 facing the metal back plate 2 of the tablet computer. The folded connecting face 602 is processed on the side face of the plastic support 7, and the multiple side edges of the first face 601 are connected to the second face 603 through the folded connecting face 602. Specifically, a first side edge 601a is located on the side of the first face 601 close to the metal frame 1 of the tablet computer, and the folded connecting face 602 is arranged at the positions of the other side edges of the first face 601 except the first side edge 601a.

[0023] The first face 601 covers most of the area of the face of the plastic support 7 facing the screen 3 of the tablet computer, and the coverage area of the second face 603 is smaller than that of the first face 601. The main purpose of the second face 603 is to form an electrical connection with the metal back plate 2 of the tablet computer, and the folded connecting face 602 connected to the second face 603 is indirectly connected to the metal back plate 2, so that the first face 601, the folded connecting face 602 and the metal back plate 2 form a resonant cavity of the cavity antenna. In the embodiment, the second face 603 is arranged in the shape of a concave character with an opening facing the direction of the first side edge 601a of the first face 601. It can be understood that the second face 603 can also be arranged in other shapes, as long as the first face 601, the folded connecting face 602 and the metal back plate 2 can form a resonant cavity after the second face 603 is connected to the metal back plate 2. In addition, in the embodiment, a plurality of conductive foams 8 are arranged on the second face 603. When the plastic support 7 is fixed to the metal back plate 2, the conductive foams 8 are in contact with the metal back plate 2, thereby completing the electrical connection between the second face 603 and the metal back plate 2. In order to facilitate the tuning of the resonant cavity, a plurality of through holes 601b are formed on the first face 601. The size of the resonant cavity can be adjusted by filling the through holes 601b in the later stage, thereby realizing tuning.

[0024] The excitation part 5 is also processed on the side of the plastic support 7 facing the screen 3 of the tablet computer, which is located in the direction of the first side 601a of the first side 601, and is left with a certain gap compared with the first side 601a of the first side 601a, and the excitation part 5 is closer to the metal frame 1 of the tablet computer, so the excitation part 5 is located on the opening side of the resonant cavity.

[0025] The feeder 4 is arranged under the screen 3 of the tablet computer as required and is electrically connected with the excitation part 5, in order to facilitate the arrangement of the feeder 4, the first groove 701 and the second groove 702 are arranged on the surface of the plastic support 7, wherein the first groove 701 is located at the position of the first side 601, and the second groove 702 is located at the position of the excitation part 5, the feeder 4 is arranged along the first groove 701, and the electrically connected point of the feeder 4 and the excitation part 5 is located in the second groove 702.

[0026] The cavity antenna of the tablet computer can realize the optimization of the antenna radiation efficiency, and meet the-5db antenna radiation efficiency requirement of the tablet computer with the metal frame and the back plate.

Claims

1. A planar cavity antenna, characterized by, The cavity antenna comprises a feed line, an excitation part and a cavity part, the cavity part comprises a first surface, a folded connecting surface and a second surface, a plurality of side edges of the first surface are connected with the second surface through the folded connecting surface, the second surface is electrically connected with a metal back plate of a tablet computer, the first surface, the folded connecting surface and the metal back plate enclose a resonant cavity, the excitation part is arranged at an opening side of the resonant cavity, and the feed line is electrically connected with the excitation part.

2. The tablet cavity antenna according to claim 1, wherein, The second surface is electrically connected with the metal back plate of the tablet computer through a plurality of conductive foam.

3. The tablet cavity antenna of claim 1, wherein, A plurality of through holes are arranged on the first surface.

4. The tablet cavity antenna of claim 1, wherein, The first surface is provided with a first groove, the feed line is arranged along the first groove, the excitation part is provided with a second groove, and an electrical connection point of the feed line and the excitation part is located in the second groove.

5. The tablet cavity antenna according to claim 1, wherein, The metal back plate of the tablet computer is fixedly connected with a support, and the excitation part and the cavity part are arranged on the support.

6. The tablet cavity antenna of claim 5, wherein, The excitation part and the cavity part are processed on the support through an LDS process.

7. A tablet computer, characterized by The tablet computer cavity antenna comprises any one of claims 1 to 6.

Images