Metal back cover cavity WIFI dual-frequency antenna and communication device

Abstract

The utility model relates to a kind of metal back cover cavity WIFI dual-frequency antenna and communication equipment, including metal back cover cavity and dual-frequency antenna;Metal back cover cavity inner wall is equipped with metal plating, and dual-frequency antenna is installed in metal back cover cavity;Dual-frequency antenna includes feed point, grounding point;Back cover connecting point is connected with metal back cover cavity and grounded;First coupling groove is set between feed point and grounding point, and it extends to second direction around feed point;Second coupling groove is set between feed point and grounding point;It extends to first direction around grounding point.The scheme effectively improves the antenna radiation efficiency and gain, enhances the receiving and transmitting capacity of WIFI signal, so that the equipment can obtain more stable, high-speed WIFI connection under different distances and environments;Reduce the cost and space occupation of electronic equipment, improve the integration and design flexibility of equipment;Ensure the stability and reliability of WIFI communication.

Description

Technical Field

[0001] This utility model relates to the field of communication equipment technology, and in particular to a metal back cover cavity WIFI dual-band antenna and communication equipment. Background Technology

[0002] With the widespread adoption of smart electronic devices, people have increasingly higher requirements for the Wi-Fi communication performance of these devices. Traditional Wi-Fi antennas in electronic devices with metal back covers suffer from problems such as signal attenuation and limited frequency band coverage. On the one hand, the metal material has a shielding effect on wireless signals, leading to a reduction in antenna radiation efficiency; on the other hand, single-band antennas cannot meet the growing demand for dual-band or even multi-band Wi-Fi applications, limiting the device's compatibility with Wi-Fi networks on different frequency bands. Therefore, how to achieve efficient dual-band Wi-Fi communication in electronic devices with metal back covers has become a pressing technical challenge in the industry. Utility Model Content

[0003] The purpose of this invention is to provide a metal back cover cavity WIFI dual-band antenna and communication device that can solve the technical problems of low antenna radiation efficiency and poor compatibility in existing metal back cover communication devices.

[0004] The objective of this utility model is achieved through the following technical solution.

[0005] This utility model proposes a metal back cover cavity WIFI dual-band antenna, including a metal back cover cavity and a dual-band antenna; the inner wall of the metal back cover cavity is provided with a metal plating layer, and the dual-band antenna is installed in the metal back cover cavity; the dual-band antenna includes:

[0006] A feed point, wherein the feed point is defined by having a first direction and a second direction opposite to the first direction;

[0007] The grounding point is located in the first direction of the power supply point;

[0008] The back cover connection point is connected to the metal back cover cavity and grounded;

[0009] A first coupling groove is disposed between the power supply point and the grounding point, surrounds the power supply point, and extends in the second direction;

[0010] The second coupling slot is disposed between the power supply point and the grounding point; it surrounds the grounding point and extends in the first direction.

[0011] This utility model also proposes a communication device, including the metal back cover cavity WIFI dual-band antenna as described above.

[0012] The metal back cover cavity dual-band WIFI antenna and communication device provided by this utility model effectively overcomes the shielding effect of metal on wireless signals through the cavity design of the metal back cover and the reasonable layout of the dual-band antenna, improves the antenna radiation efficiency and gain, and enhances the WIFI signal reception and transmission capabilities, enabling the device to obtain a more stable and high-speed WIFI connection in different distances and environments. Its unique dual-band antenna structure design can achieve dual-band coverage without the need for additional complex antenna modules, reducing the cost and space occupation of electronic devices, and improving the integration and design flexibility of the device. Through optimized power supply and grounding design, the electromagnetic interference of other electronic components to the antenna is effectively reduced, improving the antenna's anti-interference capability in complex electromagnetic environments and ensuring the stability and reliability of WIFI communication. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of a dual-frequency antenna according to the present invention;

[0014] Figure 2 This is a standing wave return loss impedance diagram of an embodiment of a dual-frequency antenna according to the present invention;

[0015] Figure 3 This is a schematic diagram of the welding of the FPC antenna, bracket, and cable wire of the metal back cover cavity WIFI dual-band antenna of this utility model.

[0016] 11. Power supply point; 12. Grounding point; 13. First coupling slot; 14. Second coupling slot; 15. Back cover connection point; 16. Third radiator; 17. Fourth radiator. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described clearly and completely below with reference to the accompanying drawings. Obviously, the specific details described below are only a part of the embodiments of this utility model, and this utility model can be implemented in many other embodiments different from those described herein. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0020] See attached document Figures 1 to 2 As shown, this utility model proposes a metal back cover cavity WIFI dual-band antenna, including a metal back cover cavity and a dual-band antenna; the inner wall of the metal back cover cavity is provided with a metal plating layer, and the dual-band antenna is installed in the metal back cover cavity; the main radiator of the dual-band antenna is an inverted F-type antenna structure, and the dual-band antenna includes:

[0021] Feed point 11 is defined with a first direction and a second direction opposite to the first direction; in this embodiment, a cable line is welded.

[0022] Grounding point 12 is located in the first direction of power supply point 11;

[0023] Connection point 15 of the back cover is connected to the metal back cover cavity and grounded; the FPC grounding foot in the bottom area forms a ground through the FPC + metal back cover, improving the overall radiation efficiency.

[0024] The first coupling slot 13 is disposed between the feed point 11 and the ground point 12, surrounds the feed point 11, and extends in the second direction; the first coupling slot 13 generates a high-frequency bandwidth and frequency in the frequency range of 2.4G-2.48G.

[0025] In this embodiment, the first coupling slot 13 is the coupling slot between the feed point 11 and the ground point 12. This position can control the 2.4G-2.48G high-frequency bandwidth and frequency. The size and width of this slot will affect the high-frequency bandwidth and resonance amplitude.

[0026] The second coupling slot 14 is disposed between the power supply point 11 and the grounding point 12; it surrounds the grounding point 12 and extends in the first direction; the second coupling slot 14 generates an ultra-high frequency bandwidth and frequency in the frequency range of 5.12G-5.82G.

[0027] In this embodiment, the second coupling slot 14 is the coupling slot between the feed point 11 and the ground point 12. This position is extremely sensitive, controlling the 5.12G-5.82G ultra-high frequency bandwidth and frequency. The size and width of this slot will affect the ultra-high frequency bandwidth and resonance amplitude, and at the same time, it can also control the duration of the 5G (5120-5820MHz) ultra-high frequency.

[0028] The third radiator 16 is an antenna extension located in the second direction from the feed point. The third radiator 16 is used to assist in controlling the frequency resonance between 2.4 GHz and 2.48 GHz. Its length directly affects the 2.4 GHz-2.48 GHz frequency resonance.

[0029] The fourth radiator 17 is an antenna extension located in the first direction of the feed point; the fourth radiator 17 is used to assist in controlling the frequency resonance between 5.12G and 5.82G. Its length directly affects the 5.12G-5.82G frequency resonance.

[0030] Furthermore, a shielding layer is provided next to the dual-band antenna to isolate other electronic components.

[0031] On the other hand, this utility model also proposes a communication device, including a metal back cover cavity WIFI dual-band antenna as described above.

[0032] This utility model has the following beneficial effects:

[0033] Improved signal performance: The cavity design of the metal back cover and the reasonable layout of the dual-band antenna effectively overcome the shielding effect of metal on wireless signals, improve the radiation efficiency and gain of the antenna in the 2.4GHz and 5GHz bands, enhance the WIFI signal reception and transmission capabilities, and enable the device to obtain a more stable and faster WIFI connection in different distances and environments.

[0034] Achieving dual-band coverage: The unique dual-band antenna structure design achieves dual-band coverage without the need for additional complex antenna modules, reducing the cost and space occupation of electronic devices and improving the integration and design flexibility of the devices.

[0035] Enhanced anti-interference capability: Optimized power supply, grounding, and isolation shielding design effectively reduces electromagnetic interference from other electronic components to the antenna, improves the antenna's anti-interference capability in complex electromagnetic environments, and ensures the stability and reliability of WIFI communication.

[0036] In another embodiment of this utility model, refer to the appendix Figure 1 and appendix Figure 3As shown, the metal back cover of the electronic device employs a special integrated design, with a portion of it cavityd. This cavity has specific dimensions and shape, determined through precise simulation and calculation to meet the resonance requirements of the dual-band antenna. The inner wall of the cavity is metallized to enhance signal reflection and focusing. Inside the cavity of the metal back cover, a dual-band antenna structure is installed. This antenna consists of a main radiator and parasitic radiators. The main radiator is responsible for the primary signal radiation and reception, while the parasitic radiators assist in adjusting the antenna's resonant frequency to achieve dual-band coverage. The main radiator adopts an inverted-F antenna structure, characterized by its compact size and high radiation efficiency. By adjusting its length, width, and bending shape, it resonates in both the 2.4GHz and 5GHz bands. The parasitic radiators cooperate with the main radiator, altering the antenna's impedance characteristics through coupling, widening the antenna's bandwidth, and ensuring good matching within both bands.

[0037] Furthermore, to ensure effective antenna excitation, this embodiment employs an optimized feeding method. A feed point 11 is positioned at an appropriate location on the antenna, and this feed point 11 is connected to the radio frequency circuitry of the electronic device via a microstrip line. Simultaneously, a well-designed grounding structure reliably connects the antenna's grounding terminal to the cavity of the metal back cover, forming a good electrical path, reducing signal reflection, and improving the antenna's radiation efficiency.

[0038] In this embodiment, considering the interference of other electronic components inside the metal back cover on the antenna performance, a shielding layer is provided between the antenna and other components. The shielding layer is made of a material with high magnetic permeability, which can effectively block electromagnetic interference generated by other components and ensure the stability and reliability of the antenna when operating in dual frequency bands.

[0039] For the fabrication of the metal back cover cavity, this embodiment selects a metal material with good electrical conductivity and mechanical properties, such as aluminum alloy. Through precise mold manufacturing processes, specific areas of the metal back cover are machined into cavity structures. The dimensional accuracy of the cavity is controlled within ±0.05mm to ensure the antenna's resonant performance. The cavity interior undergoes chemical copper plating to form a uniform metal plating layer on the inner wall, with a thickness controlled between 0.01-0.03mm, enhancing signal reflection.

[0040] In this embodiment, for the fabrication and installation of the dual-band antenna: the main radiator and parasitic radiator are made of 0.1mm thick copper foil material, etched into the designed shape. The fabricated main radiator and parasitic radiator are fixed inside the cavity according to the designed position. High-precision laser welding technology is used to connect the feed point 11 to the microstrip line, and the grounding terminal is reliably welded to the metal back cover cavity. The resistance of the welding point is controlled below 0.01Ω to ensure a good electrical connection.

[0041] In this embodiment, the shielding layer is installed by cutting pre-made high-permeability shielding material into appropriate sizes and installing it between the antenna and other electronic components. It is then fixed by adhesive or clips to ensure that the shielding layer fits tightly with the metal back cover and other components without gaps, effectively blocking electromagnetic interference.

[0042] See attached document Figure 2 As shown, the frequency range covered by this embodiment is 2400-2440-2483.5 MHz and 5120-5500-5820 MHz.

[0043] The FPC antenna carrier is grounded at the bottom and sides through slotting and a metal back cover; it couples WIFI-2.4 / 5.8G, achieving an effective resonant voltage standing wave ratio, thereby meeting the requirements for extending high-frequency and ultra-high-frequency bandwidth.

[0044] In this embodiment, the coupling slot and extended ground are the main radiators of the antenna. To improve the radiation efficiency of the antenna body, the bottom and sides of the metal back cover are integrated with the reference ground and the antenna FPC.

[0045] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications, substitutions, and improvements without departing from the concept of this utility model, and these should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the claims.

Claims

1. A metal back cover cavity WIFI dual-band antenna, characterized in that, It includes a metal back cover cavity and a dual-band antenna; the inner wall of the metal back cover cavity is provided with a metal plating layer, and the dual-band antenna is installed in the metal back cover cavity; the dual-band antenna includes: A feed point, wherein the feed point is defined by having a first direction and a second direction opposite to the first direction; The grounding point is located in the first direction of the power supply point; The back cover connection point is connected to the metal back cover cavity and grounded; A first coupling groove is disposed between the power supply point and the grounding point, surrounds the power supply point, and extends in the second direction; The second coupling slot is disposed between the power supply point and the grounding point; it surrounds the grounding point and extends in the first direction.

2. The metal back cover cavity WIFI dual-band antenna according to claim 1, characterized in that, The first coupling slot generates a high-frequency bandwidth with a frequency range between 2.4G and 2.48G.

3. The metal back cover cavity WIFI dual-band antenna according to claim 2, characterized in that, The second coupling slot generates an ultra-high frequency bandwidth with a frequency range between 5.12G and 5.82G.

4. The metal back cover cavity WIFI dual-band antenna according to claim 1, characterized in that, It also includes a third radiator, which is an antenna extension located in the second direction of the feed point.

5. The metal back cover cavity WIFI dual-band antenna according to claim 4, characterized in that, The third radiator is used to assist in controlling the frequency resonance between 2.4G and 2.48G.

6. The metal back cover cavity WIFI dual-band antenna according to claim 1, characterized in that, It also includes a fourth radiator, which is an antenna extension located in the first direction of the feed point.

7. The metal back cover cavity WIFI dual-band antenna according to claim 6, characterized in that, The fourth radiator is used to assist in controlling the frequency resonance between 5.12G and 5.82G.

8. The metal back cover cavity WIFI dual-band antenna according to claim 1, characterized in that, The dual-frequency antenna is provided with a shielding layer to isolate other electronic components.

9. The metal back cover cavity WIFI dual-band antenna according to claim 1, characterized in that, The main radiator of the dual-frequency antenna is an inverted F-type antenna structure.

10. A communication device, characterized in that, Includes the metal back cover cavity WIFI dual-band antenna as described in any one of claims 1 to 9.

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