Antenna with all-metal shell

Abstract

The utility model provides an antenna with an all-metal shell, which comprises a metal front shell, a metal middle frame and a metal rear shell which are sequentially arranged, the metal middle frame is connected with an antenna cable and is provided with air outlets, and the metal middle frame is provided with a plurality of gaps around at least one air outlet; the antenna further comprises heat dissipation fins which are coupled with the metal middle frame at the air outlet. The antenna with the all-metal shell is not provided with an antenna body, the air outlet area of the metal shell is provided with a plurality of gaps, and the air outlet is coupled with the heat dissipation fins according to the shape of the air outlet, so that the conformal antenna is realized, the requirements of the extreme environment and layout are met, the cost of the antenna can be controlled, and the antenna can be applied to notebook computers and the like. The notebook computer is particularly suitable for ultrathin all-metal notebook computers and commercial models with heat dissipation modules.

Description

Technical Field

[0001] The utility model relates to a full-metal shell, in particular to an antenna with a full-metal shell. Background Art

[0002] With the aesthetic requirements for the design ID of electronic products, especially laptop computers or handheld game consoles, the design of full-metal (magnesium-aluminum) shells is becoming more and more common, especially for high-end models, which poses great challenges to the antenna design of the shell.

[0003] Currently, antenna designs for full-metal shells have been publicly studied both at home and abroad. For example, Figure 1 As shown, it is a typical antenna design scheme for a full-metal shell. The antenna is a cavity antenna, whose upper shell is formed by integrating the antenna 101 of the LDS (Laser Direct Structuring) technology and the alloy shell 102 of CNC (Computer Numerical Control) machining, and the lower shell is the bracket 103 of an ABS plastic bracket. And the upper and lower shells are locked by screws or pressed by conductive foam to form the whole cavity antenna. In addition, the antenna 101 is connected to the cable 104.

[0004] The disadvantages of this antenna design scheme are as follows: 1) After several generations of product iterations, the cost is still relatively high, and the current cost of the product is $3.00. 2) Due to the settings of the antenna 101, the alloy shell 102, and the bracket 103, the structure of the scheme is complex. 3) After a long time of development for this antenna design scheme, the space for product iteration and optimization is very small. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an antenna with a full-metal shell to realize a conformal antenna, meet the requirements of extreme environments and layouts, and be able to control the antenna cost.

[0006] To achieve the above purpose, the utility model provides an antenna with a full-metal shell, which includes a metal front shell, a metal middle frame, and a metal rear shell arranged in sequence. The metal middle frame is connected to an antenna cable and is provided with an air outlet, and the metal middle frame is provided with a plurality of gaps around at least one air outlet; the antenna with the full-metal shell further includes heat dissipation fins, which are coupled to the metal middle frame at the air outlet.

[0007] The plurality of gaps are connected to the air outlet, and at least one gap is horizontally arranged.

[0008] The air outlets are arranged in a plurality of horizontal rows and a plurality of vertical rows; one end of the antenna cable is welded to the metal middle frame between adjacent two horizontal rows of air outlets and between adjacent two vertical rows of air outlets through a feeding solder pad.

[0009] The gap includes a first gap, a second gap, and a third gap. The first gap is horizontally divided and disposed between two air outlets in adjacent horizontal rows of the feeding solder pad. The second gap is vertically divided and disposed between two air outlets in adjacent vertical rows of the feeding solder pad. The third gap is horizontally grooved around the air outlet adjacent to both the first gap and the second gap.

[0010] The length of the third gap is an integer multiple of 9 / 40 to 11 / 40 of the working wavelength.

[0011] The antenna cable is located at the groove at the junction of the metal middle frame and the metal front shell, at the groove on the metal front shell, or at the groove on the metal middle frame, and is fixed by the groove.

[0012] All the gaps are filled with insulating materials.

[0013] A coating is sprayed on the insulating material.

[0014] Vertical insulating grooves are provided on the heat dissipation fins, so that the heat dissipation fins are divided into a first fin portion and a second fin portion that are spaced apart.

[0015] The insulating grooves are filled with isolation dielectric sheets.

[0016] The antenna of the all-metal shell of the present utility model has no antenna body. Multiple gaps are provided in the air outlet area of the metal shell, and the shape of the air outlet and the heat dissipation fins are relied on for coupling to realize a conformal antenna, meeting the requirements of extreme environments and layouts, and being able to control the antenna cost. It can be applied to laptops, especially ultra-thin all-metal laptops and commercial models with a heat dissipation module. In addition, the gaps can be made invisible through spraying and painting treatment in terms of appearance. Description of the Drawings

[0017] Figure 1 It is an overall structure diagram of a typical antenna of an all-metal shell;

[0018] Figures 2 - 4 It is a schematic diagram of the overall structure of an antenna of an all-metal shell according to an embodiment of the present utility model;

[0019] Figure 5 As shown in Figure 2 It is a schematic diagram of the structure of an antenna of an all-metal shell shown in

[0020] Figure 6 It is Figure 2 A partially enlarged inner view diagram of an antenna of an all-metal shell shown in

[0021] Figure 7 It is Figure 2The dimension diagram of the gap around the air outlet of an antenna with a full-metal housing as shown;

[0022] Figure 8 is as shown in Figure 2 The dimension diagram of the isolation dielectric sheet of an antenna with a full-metal housing as shown;

[0023] Figure 9 is as shown in Figure 2 The simulated electric field result diagram of an antenna with a full-metal housing as shown;

[0024] Figure 10 is the antenna efficiency diagram of the antenna with a full-metal housing of the present utility model;

[0025] Figure 11 is the far-field gain diagram of the antenna with a full-metal housing of the present utility model;

[0026] Figure 12 is the far-field gain result diagram after impedance matching of the antenna with a full-metal housing of the present utility model;

[0027] Figure 13 is the s-parameter simulation result diagram of the impedance of the antenna with a full-metal housing of the present utility model. Specific embodiments

[0028] To make the purpose, technical solutions and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this specification.

[0029] Figures 2 - 4 An antenna with a full-metal housing according to an embodiment of the present utility model. The antenna design of the present utility model has no antenna body. Multiple gaps are provided in the air outlet area of the metal housing, and the shape of the air outlet is coupled with the heat dissipation fins to realize a conformal antenna, meeting the requirements of extreme environments and layouts, and being able to control the antenna cost. It can be applied to notebooks, especially ultra-thin full-metal notebooks and commercial models with a heat dissipation module. In addition, a coating is sprayed on the insulating material, and the gaps can be made invisible through spray painting treatment from the appearance.

[0030] As shown in Figures 2 - 4As shown, the antenna of the all-metal housing includes a metal front shell 10, a metal middle frame 20, and a metal rear shell 30 arranged in sequence from bottom to top to form the appearance surface of the antenna of the all-metal housing. A plurality of horizontally arranged and vertically arranged air outlets 21 are provided on the metal middle frame 20 for the fan to discharge air. In this embodiment, the number of air outlets 21 is 6, and they are arranged in 3 vertical rows and 2 horizontal rows.

[0031] By Figure 5 the position where the antenna cable 40 is located can be found. The antenna cable 40 is on the side of the metal middle frame 20 close to the metal front shell 10 (i.e., the lower end side of the metal middle frame 20). One end of the antenna cable 40 is provided with a feeding soldering pad 41, and is soldered to the metal middle frame 20 through the feeding soldering pad 41. Preferably, it is soldered between two horizontally arranged air outlets 21 adjacent to the feeding soldering pad 41 (to determine its height) and between two vertically arranged air outlets 21 adjacent to it (to determine its left and right positions), so as to realize the electrical connection between the antenna cable 40 and the metal middle frame 20. The antenna cable 40 is at the groove at the junction of the metal middle frame and the metal front shell, at the groove on the metal front shell 10, or at the groove on the metal middle frame 20 to be fixed through the groove. The antenna cable 40 has an insulating outer shell to avoid conduction with the all-metal housing.

[0032] Furthermore, by Figure 6 the effective structure of the antenna can be clearly seen in detail. A plurality of gaps s1 to s3 are provided around at least one air outlet 21 on the metal middle frame 20. In this embodiment, the first gap s1 of the metal middle frame 20 is horizontally divided and arranged between two horizontally arranged air outlets 21 adjacent to the feeding soldering pad 41 to divide the feeding provided by the antenna cable 40 and the ground level GND. The second gap s2 of the metal middle frame 20 is vertically divided and arranged between two vertically arranged air outlets 21 adjacent to the feeding soldering pad 41 to connect the upper and lower air outlets 21 by splitting holes. The third gap s2 of the metal middle frame 20 is transversely grooved around the air outlet 21 adjacent to both the first gap s1 and the second gap s2 at the same time. In addition, the first gap s1, the second gap s2, and the third gap s2 are all filled with an insulating material, and a coating is sprayed on the insulating material so that the insulating material is sprayed to be consistent with the appearance of the metal middle frame 20. In this embodiment, the insulating material filled in the first gap s1, the second gap s2, and the third gap s2 is ABS plastic.

[0033] Please refer to Figure 5 again. The antenna of the all-metal housing further includes heat dissipation fins provided inside the metal middle frame 20 and aligned with all the air outlets 21 to conduct the heat on the CPU to the heat dissipation fins through a pipeline, and the heat dissipation fins use the air outlet channel to take the hot air out of the system. The heat dissipation fins are coupled with the metal middle frame at the air outlet to realize a conformal antenna.

[0034] The heat dissipation fins are provided with vertical insulating grooves, so that the heat dissipation fins are divided into a first fin portion 51 and a second fin portion 52 which are spaced apart. Thus, the first fin portion 51 and the second fin portion 52 are coupled to the feeding portion of the metal middle frame 20 and serve as a return path, thereby simulating the effective path of the antenna in the low frequency band. The first fin portion 51 and the second fin portion 52 are electrically insulated from each other. The insulating grooves are filled with isolation dielectric sheets 53, and the isolation dielectric sheets 53 serve to divide the return path.

[0035] In the present utility model, the metal environment around the air outlet is designed in terms of size, so that the housing is more in line with the antenna resonance.

[0036] As Figure 7 shown, in this embodiment, the length L3 of the third slit s3 is 9.8 mm and the width W3 is 1 mm to form a low frequency band resonance cavity; the length L2 of the second slit s2 is 2.7 mm and the width W2 is 1 mm to form a series resonance cavity for the upper and lower air outlets; the length L1 of the first slit s1 is 3.15 mm and the width W1 is 1 mm to form a series resonance cavity for the left and right air outlets. Actually, when debugging the antenna, the outlet structure is fully utilized for adjustment design, and it only needs to satisfy that the length of the third slit s3, i.e., the length of the low frequency band resonance cavity, is N×1 / 4×λ (λ is the operating wavelength, and N is a positive integer) and a ±10% error range is allowed. Therefore, the length of the third slit is an integer multiple of 9 / 40 to 11 / 40 of the operating wavelength. This application does not need to be restricted by structural changes, which is also the advantage of the antenna with a full metal housing in the present utility model, and a conformal antenna is realized by means of the existing metal housing structure.

[0037] As Figure 8 shown, in this embodiment, the isolation dielectric sheet 53 serves to divide the return path, the length L4 of the first fin portion 51 is 5.5 mm, and the distance L5 between one end of the second fin portion 52 adjacent to the insulating groove and the feeding solder pad 41 is 18.5 mm. The return path formed by the heat dissipation fins can well adjust the resonance matching.

[0038] In other embodiments, the length L4 of the first fin portion 51 can also be 9 / 40 to 11 / 40 of the operating wavelength.

[0039] The working principle of the antenna with a full metal housing in the present utility model is as follows:

[0040] The antenna with a full metal housing in the present utility model utilizes the electric field E pressure difference caused by the upper and lower edges of the air outlet to realize the transformation of the electric field and the magnetic field, and simulates the electric field For:

[0041]

[0042] The result obtained according to the simulated electric field is as Figure 9As shown, that is to say, the present utility model breaks the air outlet by opening a slit near the air outlet, which actually causes a change in the current path and results in low-frequency resonance.

[0043] Calculate each point point near the air outlet, list the specific remaining electric field strength, and the results are shown in Table 1.

[0044] Table 1: Remaining electric field strength at each point near the air outlet

[0045]

[0046] The near-field current forms the actual resonance frequency in the far field, and the obtained efficiency diagram as shown is used for further calculation of the actual far-field gain Gain. Efficiency is an important indicator for judging the antenna performance. According to Figure 10 the efficiency diagram shown, the far-field gain diagrams at frequencies of 2.4 GHz, 2.45 GHz, 2.5 GHz, 5.15 GHz, 5.5 GHz, and 5.8 GHz are as shown Figure 10 in. Figure 11 shown.

[0047] In addition, due to structural problems, the air outlet of the antenna may not be able to complete the impedance matching problem. In this embodiment, by inserting the heat dissipation fin into the relative position dielectric sheet, the impedance matching is completed, and the obtained far-field gain result diagram after impedance matching is as shown Figure 12 in.

[0048] In order to obtain the maximum power on the load, the impedance matching formula is: Zs is the source impedance, Z0 is the characteristic impedance of the transmission line, Zd is the load impedance, and Yd is the load admittance.

[0049] The present utility model changes the load impedance Z by adding a fin dielectric sheet, and the s-parameter simulation result diagram of the load impedance Z is as shown Figure 13 in.

[0050] In other embodiments, the number of slits provided around the air outlet can also be 1 or any number. Among them, when the number of the air outlets is 1, one end of the antenna cable is welded to the metal middle frame through a feeding solder pad; the slits include a plurality of slits connected to the air outlet, and at least one slit is horizontally arranged. The dimensional requirements of the horizontally arranged slits are the same as those above, and the length is an integer multiple of 9 / 40 to 11 / 40 of the working wavelength.

[0051] The various embodiments in this specification are described in a progressive manner. For the parts that are the same or similar among the various embodiments, reference can be made to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for the relevant parts, reference can be made to the partial description of the method embodiments.

[0052] The above is only the embodiments of this specification and is not intended to limit this specification. For those skilled in the art, various modifications and changes can be made to this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this specification shall be included within the scope of the claims of this specification.

Claims

1. An antenna with a full-metal housing, comprising a metal front shell, a metal middle frame, and a metal rear shell arranged in sequence, characterized in that, The metal middle frame is connected to an antenna cable, and an air outlet is provided thereon. At least one gap is provided around at least one air outlet of the metal middle frame; the antenna further includes heat dissipation fins, which are coupled to the metal middle frame at the air outlet.

2. The antenna according to claim 1, characterized in that, A plurality of the gaps are connected to the air outlet, and at least one gap is horizontally arranged.

3. The antenna according to claim 1, characterized in that The air outlets are arranged in a plurality of horizontal rows and a plurality of vertical rows; one end of the antenna cable is welded to the metal middle frame between two adjacent horizontal rows of air outlets and between two adjacent vertical rows of air outlets through a feeding solder pad. The gaps include a first gap, a second gap and a third gap. The first gap is horizontally divided and provided between two air outlets in adjacent horizontal rows of the feeding solder pad. The second gap is vertically divided and provided between two air outlets in adjacent vertical rows of the feeding solder pad. The third gap is horizontally grooved around the air outlet adjacent to both the first gap and the second gap.

4. The antenna according to claim 3, characterized in that, The length of the third gap is an integer multiple of 9 / 40 to 11 / 40 of the working wavelength.

5. The antenna according to claim 1, wherein The antenna cable is located at the groove at the junction of the metal middle frame and the metal front shell, at the groove on the metal front shell, or at the groove on the metal middle frame, and is fixed by the groove.

6. The antenna according to claim 1, characterized in that All the gaps are filled with insulating materials.

7. The antenna according to claim 6, characterized in that, A coating is sprayed on the insulating material.

8. The antenna according to claim 1, wherein Vertical insulating grooves are provided on the heat dissipation fins, so that the heat dissipation fins are divided into a first fin portion and a second fin portion which are spaced apart.

9. The antenna according to claim 8, wherein The insulating grooves are filled with isolation dielectric sheets.

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