Cavity antenna suitable for all-metal slit-free narrow-frame tablet personal computer

Abstract

The utility model discloses a cavity antenna suitable for an all-metal slit-free narrow-frame tablet personal computer, which comprises a tablet personal computer metal bottom shell, the upper end of the tablet personal computer metal bottom shell is respectively provided with an antenna plastic support, the side wall of the antenna plastic support is provided with an antenna feeder, and the upper end of the antenna plastic support is provided with a glass cover plate. Through the above structure, the consistency after mass production is ensured, the cavity antenna is three-dimensional, the required frequency band is achieved through the size of the cavity, the traditional antenna is basically of a planar linear structure, the antenna is difficult to radiate signals in the environment with a metal machine body and a small screen, and the antenna is not easy to radiate due to the planar structure. When the cavity antenna is used, signals can be greatly absorbed by the metal, the cavity antenna is three-dimensional, the signals needing to be radiated can be concentrated in a clearance which is only about 3mm to be radiated out through the cavity, the signals cannot be absorbed by the surrounding metal, and the antenna is high in directivity and interference resistance.

Description

Technical Field

[0001] The utility model relates to the field of communication technologies, and particularly to a cavity antenna applicable to a full-metal narrow-bezel tablet computer without gaps. Background Art

[0002] Currently, most tablet computers on the market have a full-metal body and a very narrow screen bezel, which has a great impact on signal transmission in communication. As an important carrier for signal reception and transmission, traditional antennas generally require a clearance of about 8 mm. In this case, there will be a large black border on the screen, and the screen-to-body ratio is very small, only about 70%. The appearance is not very good-looking. Currently, the clearance on the market is basically about 3 mm. In order to make the product look better and have a larger screen-to-body ratio, the clearance given to the antenna is getting smaller and smaller. At this time, a 1.2 - 1.5 mm gap will be opened on the back of the metal shell of the tablet computer for signal transmission. Although this can improve signal reception and transmission, there will be an obvious gap in the appearance of the product. For many companies, the appearance is not perfect. Therefore, it is necessary to find an antenna that can meet the signal transmission requirements while ensuring a perfect appearance. So, it is necessary to set up a cavity antenna applicable to a full-metal narrow-bezel tablet computer without gaps. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cavity antenna applicable to a full-metal narrow-bezel tablet computer without gaps, so that it can ensure that the full-metal body is not slit, and under the condition of a larger screen-to-body ratio, ensure signal communication, and the bandwidth of this antenna will also be improved to ensure the consistency after mass production. The cavity antenna is three-dimensional, and the required frequency band is achieved through the size of the cavity.

[0004] In order to achieve the above purpose, a cavity antenna applicable to a full-metal narrow-bezel tablet computer without gaps is provided, including a metal bottom shell of the tablet computer. An antenna plastic bracket is respectively arranged at the upper end of the metal bottom shell of the tablet computer. An antenna feed is arranged on the side wall of the antenna plastic bracket. A glass cover plate is arranged at the upper end of the antenna plastic bracket.

[0005] According to the cavity antenna applicable to a full-metal narrow-bezel tablet computer without gaps, LDS is arranged on one side of the antenna plastic bracket.

[0006] According to the cavity antenna applicable to a full-metal narrow-bezel tablet computer without gaps, a grounding conductive foam is arranged at the lower end of the glass cover plate.

[0007] Advantageous Effects

[0008] On the upper end of the metal bottom case of the tablet computer, there are respectively an LDS and an antenna plastic bracket. On the upper end of the LDS and the antenna plastic bracket, there is a grounding conductive foam. On the upper end of the grounding conductive foam, there is a glass cover plate. On one side of the antenna plastic bracket, there is an antenna feed, which can ensure that the all-metal body has no seam and the signal communication can be guaranteed when the screen ratio is larger. Moreover, the antenna bandwidth will also be improved to ensure the consistency after mass production. The cavity antenna is three-dimensional, and the required frequency band is achieved through the size of the cavity. The traditional antennas are basically planar linear structures. Such antennas are difficult to radiate signals in an environment with a metal body and a very small screen. Since the antenna is a planar structure, a lot of signals will be absorbed by the metal. However, the cavity antenna is three-dimensional, and through the cavity, the signals to be radiated can be concentrated in a clearance of only about 3 mm for radiation without being absorbed by the surrounding metal. Moreover, the directivity of the antenna is very strong, and the anti-interference ability is also very strong.

[0009] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0011] Figure 1 is a three-dimensional view of the cavity antenna for a full-metal seamless narrow-bezel tablet computer proposed by the present utility model;

[0012] Figure 2 Proposed by the present utility model Figure 1 is a schematic structural view of the part A in

[0013] Legend:

[0014] 1. LDS; 2. Grounding conductive foam; 3. Metal bottom case of the tablet computer; 4. Antenna plastic bracket; 5. Antenna feed; 6. Glass cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0016] Refer to Figure 1-2, The embodiment of the utility model is applicable to the cavity antenna of a full-metal seamless narrow-frame tablet computer, which includes the metal bottom shell 3 of the tablet computer. The metal bottom shell 3 of the tablet computer is the bottom shell of the whole tablet, which is full-metal and belongs to the appearance of the tablet. Antenna plastic brackets 4 are respectively arranged at the upper end of the metal bottom shell 3 of the tablet computer. The antenna plastic brackets 4 are where the antenna is to be made. Through the LDS process, an antenna feed 5 is arranged on the side wall of the antenna plastic bracket 4. The antenna feed 5 is the point where the antenna signal enters the front-end chip through the transmission line. A glass cover plate 6 is arranged at the upper end of the antenna plastic bracket 4. The glass cover plate 6 is the black edge area of the screen and its material belongs to glass.

[0017] An LDS1 is arranged on one side of the antenna plastic bracket 4.

[0018] A grounding conductive foam 2 is arranged at the lower end of the glass cover plate 6. The grounding conductive foam 2 is used to connect the antenna and the steel sheet on the screen together, reduce the influence on the antenna, and improve the antenna performance.

[0019] Working principle: Currently, most tablet computers on the market have a full-metal body and a very narrow screen border, which has a great impact on signal transmission in communication. As an important carrier for signal reception and transmission, the performance of the antenna generally requires a clearance of about 8 mm. Currently, the clearance on the market is basically about 3 mm. In order to make the product look good and have a larger screen ratio, the clearance given to the antenna is getting smaller and smaller. In order to make the communication signal meet the communication standard and the Internet speed faster, a 1.2 - 1.5 mm gap is opened on the back of the metal shell of the tablet computer for signal transmission. Although this can improve the signal reception and transmission, there will be a very obvious gap in the appearance of the product. For many companies, the appearance is not perfect. Therefore, it is necessary to find an antenna that can meet the demand for signal transmission while ensuring a perfect appearance. Currently, a cavity antenna developed by our company can meet this demand. This antenna can ensure a full-metal body without seams and a larger screen ratio, while ensuring signal communication. Moreover, the bandwidth of this antenna will also be improved to ensure the consistency after mass production. The cavity antenna is three-dimensional, and the required frequency band is achieved through the size of the cavity. Traditional antennas are basically planar linear structures. Such antennas are very difficult to radiate signals in an environment with a metal body and a very small screen. Since the antenna is a planar structure, a lot of signals will be absorbed by the metal. However, the cavity antenna is three-dimensional. Through the cavity, the signals to be radiated can be concentrated and radiated in a clearance of only about 3 mm without being absorbed by the surrounding metal, and the directivity of the antenna is very strong and the anti-interference ability is also very strong;

[0020] The antenna bracket is made of LDS material, and then a gold-containing coating is deposited through laser engraving and chemical plating technologies to facilitate the welding of the cable. It consists of a cavity antenna and a cable, and is then connected to the RF port on the main board. The bottom of the cavity antenna is electrically connected to the bottom case of the tablet computer, and the upper part of the cavity antenna is electrically connected to the screen of the tablet computer.

[0021] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A cavity antenna suitable for an all-metal, non-slit, narrow-frame tablet computer, comprising a tablet computer metal bottom shell (3), characterized in that: An antenna plastic bracket (4) is provided at the upper end of the metal bottom shell (3) of the tablet computer, an antenna feed (5) is provided on the side wall of the antenna plastic bracket (4), and a glass cover plate (6) is provided at the upper end of the antenna plastic bracket (4).

2. The cavity antenna for a full-metal, non-gap, narrow-frame tablet computer according to claim 1, characterized in that: An LDS (1) is provided on one side of the antenna plastic bracket (4).

3. The cavity antenna for a full metal, non-gap, narrow-frame tablet computer according to claim 1, characterized in that: A grounded conductive foam (2) is provided at the lower end of the glass cover plate (6).

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