Notebook computer

Abstract

The utility model provides a notebook computer which comprises at least one cavity antenna, the cavity antenna is arranged between a keyboard surface and a lower cover plate of the notebook computer, and the distance between an antenna radiation plate and a specified plane ranges from one sixteenth of the antenna wavelength to one eighth of the antenna wavelength, the specified plane is a plane where the bent surface of the upper cover plate of the notebook computer is located when the upper cover plate is opened to a preset angle. The field pattern of the notebook computer antenna is relatively concentrated, after reflection of the metal plate of the cavity antenna, the antenna field pattern can reduce dead angles of receiving / transmitting of the antenna by utilizing scattering of light wave transmission, the coverage ratio of the radiation field pattern of the antenna is increased, and the transmission efficiency of the antenna is improved.

Description

Technical Field

[0001] The present application relates to the technical field of notebook computers, and in particular to a notebook computer. Background Art

[0002] The current mainstream designs of laptop computers include all-metal cases, high screen-to-body ratios, and thin and lightweight bodies. This means that the antenna must be designed in a space close to the motherboard end of the laptop, making the antenna design area relatively small.

[0003] Technical problems with existing antenna designs include: a clearance area for the antenna needs to be reserved in advance and the clearance area for the antenna is relatively small; and the antenna is combined with an undesirable material environment, resulting in high antenna costs and easily affected antenna wireless transmission performance. Utility Model Content

[0004] In view of this, the present application provides a laptop computer that uses a cavity antenna and limits the position of the antenna to solve the problems of high cost and easily affected wireless transmission performance of the antenna in existing laptop computers.

[0005] An embodiment of the present application provides a laptop computer, comprising at least one cavity antenna, wherein the cavity antenna is arranged between a keyboard surface and a lower cover of the laptop computer, and a distance range between the antenna radiation plate and a designated plane is: one sixteenth of the antenna wavelength to one eighth of the antenna wavelength, wherein the designated plane is a plane where the bent surface of the upper cover of the laptop computer is located when the upper cover is opened to a preset angle.

[0006] In one possible implementation, the cavity antenna includes: five metal plates and an antenna radiation plate; an antenna body is arranged on the antenna radiation plate; and the five metal plates and the antenna radiation plate define a cavity structure.

[0007] In a possible implementation, the metal plate is made of copper or aluminum.

[0008] In a possible implementation, the material of the metal plate is plastic, and copper-aluminum foil metal conductive stickers are attached to the inner and outer surfaces of the metal plate.

[0009] In a possible implementation, the type of the antenna body is a PIFA antenna, a monopole sub-antenna, a loop antenna or a coupled antenna.

[0010] In a possible implementation, the length of the cavity structure ranges from 35 mm to 55 mm, the width ranges from 7 mm to 9 mm, and the height ranges from 6 mm to 8 mm.

[0011] In a possible implementation, the shell of the laptop computer is made of metal.

[0012] In a possible implementation, the cavity antenna is disposed at a heat dissipation hole position of a lower cover of the laptop computer.

[0013] In a possible implementation, when the frequency of the antenna is 2.4 GHz, the distance between the antenna radiation plate and the designated plane ranges from 3.75 nm to 7.5 nm.

[0014] In a possible implementation, when the frequency of the antenna is 5 GHz, the distance between the antenna radiation plate and the designated plane ranges from 7.5 nm to 15.5 nm.

[0015] The antenna pattern of the laptop computer of the present application is relatively concentrated. After being reflected by the metal plate of the cavity antenna, the antenna pattern can utilize the scattering of light wave transmission to reduce the dead angle of antenna reception / transmission, increase the coverage ratio of the antenna radiation pattern, and improve the antenna transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A side view of the laptop computer according to the embodiment of the present application when the cover is opened 110 degrees;

[0017] Figure 2 Schematic diagram of a cavity antenna according to an embodiment of the present application.

[0018] Figure ID:

[0019] 101: cavity antenna; 102: antenna radiation plate; 103: bending surface;

[0020] 104: metal plate; 105: antenna body. DETAILED DESCRIPTION

[0021] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0022] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0024] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0025] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0026] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0027] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0028] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0029] First, the technical terms involved in the embodiments of the present application are briefly introduced.

[0030] The four sides of a laptop after opening are usually called side A, side B, side C, and side D. Side A is the upper outer shell of the laptop after closing; side B is where the screen is; side C is the keyboard surface, and side D is the bottom of the laptop, which is where the heat dissipation holes and battery are usually located. The structures corresponding to these four sides are called four major parts A, B, C, and D, which correspond to the upper cover, display screen, keyboard surface, and lower cover, respectively.

[0031] Antenna clearance zone: It keeps metal away from the antenna body (metal shielding). The resonant frequency can also be changed by changing the size of the clearance zone. The clearance zone can also change the division of the antenna near field and far field to a certain extent.

[0032] After introducing the technical terms involved in the present application, the design concept of the embodiments of the present application is briefly introduced next.

[0033] The mainstream design factors of current laptop computers include all-metal cases, high screen-to-body ratios, and thin and light bodies. This means that the antenna must be designed in a space close to the laptop motherboard, making the antenna design area relatively small.

[0034] The existing solutions mainly adopt the following design principles:

[0035] Maintain antenna clearance area: A clearance area must be reserved for the antenna, and the antenna components must be placed in the reserved space.

[0036] Antenna miniaturization: Use materials and antenna style design to reduce the size of the antenna.

[0037] Antennas are placed in the system: The antennas are placed in a position within the system where they can be used reasonably.

[0038] The antenna is combined with an imperfect metal environment: Metal conductors other than the antenna itself are factors that hinder the antenna's performance and radiation pattern.

[0039] The above solutions have the following technical problems:

[0040] If the antenna is designed on the motherboard system side, an antenna clearance area must be reserved between parts C and D of the laptop computer. The antenna clearance area needs to be injection molded, which is costly. In addition, because part A is metal, the antenna wireless transmission performance will be affected in closed-screen mode.

[0041] Since the antenna clearance area needs to be reserved in parts C and D, the space for other components will be affected, such as batteries and speakers. Therefore, for different machine environments, it is necessary to verify whether the size of the antenna clearance area is reasonable and compress the antenna clearance area as much as possible.

[0042] If the antenna is designed near the hinge of a laptop computer, since laptop computers are subject to opening and closing tests, the antenna transmission line needs to be equipped with mechanical auxiliary materials (such as Teflon tape, acetate cloth, heat shrink tubing, etc.) to prevent the transmission line from breaking or cracking, which may affect the antenna signal and cause the antenna to be combined with an undesirable material environment.

[0043] In order to solve the above problems of existing solutions, this application is based on the full metal body and lightweight design requirements of the laptop computer, utilizes the metal environment to form a local antenna cavity area, forms a miniaturized antenna, and improves the antenna field reception and transmission field pattern problems through the casing antenna radiation reflection.

[0044] The advantages of this application are:

[0045] 1. This application uses a cavity-structured antenna, so that the laptop parts C and D do not need to add additional antenna clearance areas, thereby reducing costs.

[0046] 2. The antenna of the present application adopts a metal file wall structure, which can suppress system noise. The bottom of the antenna is shielded by D parts, and there is no need to consider the impact of SAR risks on the human body.

[0047] 3. This application adopts a cavity-like antenna design, and the antenna field pattern is relatively concentrated. After reflection through the metal plate, the antenna field pattern can use the scattering of light wave transmission to reduce the dead angle of antenna reception / transmission, increase the coverage ratio of the antenna radiation field pattern, and improve the antenna transmission efficiency.

[0048] After introducing the application scenarios and design concepts of the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described below.

[0049] like Figure 1 As shown, an embodiment of the present application provides a laptop computer, comprising at least one cavity antenna 101 of the above-mentioned embodiment, wherein the cavity antenna 101 is arranged between the keyboard surface and the lower cover of the laptop computer; the range of the distance d between the antenna radiation plate 102 of the cavity antenna 101 and the specified plane is: one sixteenth of the antenna wavelength to one eighth of the antenna wavelength, wherein the specified plane is the plane where the bent surface 103 of the upper cover of the laptop computer is located when the upper cover is opened to a preset angle.

[0050] like Figure 1 As shown, the preset angle is 110 degrees; the distance between the antenna and the bending surface 103 is about 7.5 mm (7.5±1 mm). The existing antenna is designed to have a highly directional field pattern, which will be scattered by the metal-like material after reflection.

[0051] Exemplarily, the number of the cavity antennas is one or two, and the selection can be made according to the space area between the keyboard surface and the lower cover of the notebook computer.

[0052] The laptop computer of this embodiment adopts a cavity antenna, which can utilize the scattering of light wave transmission to reduce the dead angle of antenna reception / transmission, increase the coverage ratio of the antenna radiation field pattern, improve the antenna transmission efficiency, and thus reduce the size of the antenna.

[0053] like Figure 2 As shown, the cavity antenna includes: five metal plates 104 and an antenna radiation plate 102; an antenna body 105 is arranged on the antenna radiation plate 102; and the five metal plates 104 and the antenna radiation plate 102 define a cavity structure.

[0054] In some embodiments, the metal plate is made of copper or aluminum.

[0055] In some embodiments, the material of the metal plate is plastic, and copper-aluminum foil metal conductive stickers are attached to the inner and outer surfaces of the metal plate.

[0056] In some embodiments, the type of the antenna body is a PIFA antenna, a monopole sub-antenna, a loop antenna or a coupled antenna.

[0057] In some embodiments, the size of the cavity antenna is approximately 45*8*7 mm, that is, length: 45±10 mm, width: 8±1 mm, height: 7±1 mm.

[0058] Preferably, the shells of the laptop computers are all made of metal.

[0059] Preferably, the cavity antenna is arranged at a heat dissipation hole position of a lower cover plate of the laptop computer.

[0060] Based on the principle of constructive interference of transmitted waves, when the distance between the antenna and the metal surface is: one-quarter wavelength, one-eighth wavelength, and one-sixteenth wavelength, the electromagnetic field of the antenna will produce a superposition effect.

[0061] Exemplarily, when the antenna frequency f=2.4 GHz, the wavelength λ is:

[0062]

[0063] The quarter wavelength length is:

[0064]

[0065] One eighth wavelength is 15.5 mm; one sixteenth wavelength is 7.5 mm.

[0066] When the antenna frequency f = 5 GHz, the wavelength λ is:

[0067]

[0068] A quarter wavelength is:

[0069]

[0070] One eighth wavelength is 7.5 mm; one sixteenth wavelength is 3.75 mm.

[0071] Therefore, when the frequency of the antenna is 2.4 GHz, the distance between the antenna radiation plate and the designated plane is in the range of 3.75 nm to 7.5 nm. When the frequency of the antenna is 5 GHz, the distance between the antenna radiation plate and the designated plane is in the range of 7.5 nm to 15.5 nm.

[0072] Since all-metal laptops do not have additional antenna window areas, the antenna is designed at the heat dissipation hole position. Metal-based auxiliary materials (aluminum foil, copper foil) can also be used to overlap the heat dissipation fin structure, or a cavity-like environment can be formed using a bracket laser direct forming (LDS) process. The distance between the antenna and part A can be laser engraved (laser light engraved) inside the bracket through the bracket laser direct forming (LDS) process to form a reflection distance. This application places the antenna between metal shell parts to achieve miniaturization of the antenna through an appropriate distance.

[0073] In this embodiment, the distance from the antenna to the specified plane is evaluated using electromagnetic simulation software. When the distance between the antenna and the metal-like material becomes closer, the overall performance decreases. The simulation results show that the cavity antenna of the present application can effectively increase the antenna bandwidth and performance, the design and production cost is low, and the transmission communication efficiency is better than the current design scheme.

[0074] In addition, although illustrative embodiments are described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., combinations of schemes across various embodiments), adjustments, or variations based on the present disclosure. The elements in the claims are to be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the continuation of this application. In addition, the steps of the disclosed methods may be modified in any way, including by reordering steps or inserting or deleting steps. Therefore, it is intended that the description be viewed merely as an example, with the true scope being represented by the following claims and their full range of equivalents.

[0075] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more aspects thereof) may be used in combination with each other. After reading the above description, other embodiments may be used by a person of ordinary skill in the art, for example. Moreover, in the above detailed description, various features may be combined together to simplify the present disclosure. This should not be interpreted as intending that the disclosed features that are not requested for protection are essential to any claim. Therefore, the following claims are incorporated into the specific implementation as examples or embodiments, wherein each claim itself is a separate embodiment, and it is expected that these embodiments may be combined with each other in various combinations or permutations. The scope of the present utility model should be determined with reference to the attached claims and the full scope of equivalents given by these claims.

Claims

1. A notebook computer, characterized in that: The invention comprises at least one cavity antenna, wherein the cavity antenna is arranged between the keyboard surface and the lower cover of the laptop computer, and the distance range between the antenna radiation plate of the cavity antenna and the designated plane is: one sixteenth of the antenna wavelength to one eighth of the antenna wavelength, wherein the designated plane is the plane where the bending surface of the upper cover of the laptop computer is located when the upper cover is opened to a preset angle.

2. The notebook computer according to claim 1, characterized in that: The cavity antenna comprises: five metal plates and an antenna radiation plate; an antenna body is arranged on the antenna radiation plate; and the five metal plates and the antenna radiation plate define a cavity structure.

3. The notebook computer according to claim 2, characterized in that: The material of the metal plate is copper or aluminum.

4. The notebook computer according to claim 2, characterized in that: The material of the metal plate is plastic, and copper-aluminum foil metal conductive stickers are attached to the inner and outer surfaces of the metal plate.

5. The notebook computer according to claim 2, characterized in that: The type of the antenna body is a PIFA antenna, a monopole sub-antenna, a loop antenna or a coupled antenna.

6. The notebook computer according to claim 2, characterized in that: The length of the cavity structure ranges from 35 mm to 55 mm, the width ranges from 7 mm to 9 mm, and the height ranges from 6 mm to 8 mm.

7. The notebook computer according to claim 1, characterized in that: The shells of the notebook computers are all made of metal.

8. The notebook computer according to claim 1, characterized in that: The cavity antenna is arranged at the heat dissipation hole position of the lower cover plate of the notebook computer.

9. The notebook computer according to claim 1, characterized in that: When the frequency of the antenna is 2.4 GHz, the distance between the antenna radiation plate and the designated plane ranges from 3.75 nm to 7.5 nm.

10. The notebook computer according to claim 1, characterized in that: When the frequency of the antenna is 5 GHz, the distance between the antenna radiation plate and the designated plane ranges from 7.5 nm to 15.5 nm.

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