WiFi antenna of metal body electronic product

Abstract

The invention discloses a WiFi antenna of an electronic product with a metal body, and belongs to the technical field of antennae, the WiFi antenna comprises an antenna main body, a PCB copper-clad plate, a main path matching line and a coaxial line, the WiFi antenna comprises a first closed surface, a second closed surface, a third closed surface, a fourth closed surface, a feed point, a GND1 and a GND2, the tops of the first closed surface, the second closed surface and the fourth closed surface are connected with the third closed surface, the bottoms of the first closed surface, the second closed surface and the fourth closed surface are connected with the PCB copper-clad plate, the two ends of the fourth closed surface are connected with the first closed surface and the second closed surface respectively, the feed point, the GND1 and the GND2 are connected with the third closed surface, and the GND2 is connected with the third closed surface. The bottoms of the feed point, the GND1 and the GND2 are connected with the PCB copper-clad plate, and the feed point is connected with the coaxial line through main path matching; according to the invention, the problems of poor performance, low efficiency and poor user experience of a metal body antenna can be effectively solved, and the performance of the wifi antenna is effectively improved while the hand feeling (metal texture) of a user is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of antennas, and particularly relates to a WiFi antenna for metal body electronic products. Background Art

[0002] With the continuous improvement of living standards, people's pursuit of consumer electronic products is becoming more and more demanding. Especially for mobile phones, tablets and other electronic products commonly used in daily life, people's pursuit of the appearance and performance of products is getting higher and higher. The metal body can undoubtedly greatly improve the tactile and visual experience of products. However, while pursuing the metal body, higher challenges are posed to the antenna performance. While ensuring the metal body, it is necessary to ensure that the performance of the wifi antenna does not decline;

[0003] Existing wifi antennas basically adopt conventional antenna designs such as PIFA / IFA. The antenna materials include but are not limited to types such as fpc and on-board. However, the above antenna implementation methods are more advantageous for all-plastic body designs. When designed inside a metal body, the performance is greatly reduced, and even fails to meet the design requirements;

[0004] For existing traditional antenna forms, in a metal body antenna environment, the antenna bandwidth is insufficient, the waveform is narrow, and the efficiency is low, thus affecting the actual use effect. Therefore, a WiFi antenna for metal body electronic products is needed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a WiFi antenna for metal body electronic products to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A WiFi antenna for metal body electronic products, including an antenna main body, a PCB copper clad laminate, a main path matching, and a coaxial cable. The WiFi antenna includes a first closed surface, a second closed surface, a third closed surface, a fourth closed surface, a feed point, GND1 and GND2. The tops of the first closed surface, the second closed surface and the fourth closed surface are connected to the third closed surface. The bottoms of the first closed surface, the second closed surface and the fourth closed surface are connected to the PCB copper clad laminate. The two ends of the fourth closed surface are respectively connected to the first closed surface and the second closed surface. The feed point, GND1 and GND2 are connected to the third closed surface. The bottoms of the feed point, GND1 and GND2 are connected to the PCB copper clad laminate. The feed point is connected to the coaxial cable through the main path matching, and the main path matching is connected to the PCB copper clad laminate.

[0007] This WiFi antenna solves the problems of weak wifi performance and poor user experience of metal body terminal products (mainly tablets);

[0008] As a preferred solution, the WiFi antenna adopts a cavity design.

[0009] As a preferred solution, the side of the WiFi antenna close to the feeding point, GND1, and GND2 is subjected to clearance treatment, and the side of the WiFi antenna close to the feeding point, GND1, and GND2 is coupled with the side surface of the metal body to achieve 2.4G resonance.

[0010] As a preferred solution, GND1 is set to ground matching. By adjusting the ground matching reserved at the GND1 position and combining with the main path matching, the resonant frequency falls within the target frequency range.

[0011] As a preferred solution, GND2 is set as a reserved ground point, which can improve the antenna adjustability.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The present invention can effectively address the problems of poor antenna performance, low efficiency, and poor user experience of the metal body. While ensuring the user's touch (metal texture), it effectively improves the performance of the wifi antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 is a rear three-dimensional structural schematic diagram of the present invention;

[0016] Figure 3 is a top three-dimensional sectional structural schematic diagram of the present invention;

[0017] Figure 4 is a schematic diagram of the implementation scheme of the metal body cavity of the present invention;

[0018] Figure 5 is a diagram of the traditional FPC implementation method of the present invention.

[0019] In the figure: 1. Antenna main body; 101. First closed surface; 102. Second closed surface; 103. Third closed surface; 104. Fourth closed surface; 105. Feeding point; 106. GND1; 107. GND2; 2. PCB copper clad laminate; 3. Main path matching; 4. Coaxial cable. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the present invention in conjunction with embodiments.

[0021] The following embodiments are used to illustrate the present invention, but cannot be used to limit the protection scope of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions. Any simple improvement to the method of the present invention under the premise of the concept of the present invention falls within the scope claimed by the present invention.

[0022] Please refer to Figures 1-5 , the present invention provides a WiFi antenna for a metal-body electronic product, including an antenna main body 1, a PCB copper clad laminate 2, a main path matching 3, and a coaxial cable 4. The WiFi antenna includes a first closed surface 101, a second closed surface 102, a third closed surface 103, a fourth closed surface 104, a feed point 105, GND1 106, and GND2 107. The tops of the first closed surface 101, the second closed surface 102, and the fourth closed surface 104 are connected to the third closed surface 103, and the bottoms of the first closed surface 101, the second closed surface 102, and the fourth closed surface 104 are connected to the PCB copper clad laminate 2. The two ends of the fourth closed surface 104 are respectively connected to the first closed surface 101 and the second closed surface 102. The feed point 105, GND1 106, and GND2 107 are connected to the third closed surface 103. By setting GND2 107, the reserved antenna feed point 105GND2 107 is a key connection point for introducing or leading out radio frequency signals into or from the antenna. It is an interface for realizing signal transmission between the antenna and the radio frequency circuit. By reasonably connecting and adjusting the GND2 107 point, the electrical characteristics of the antenna can be changed;

[0023] The bottoms of the feed point 105, GND1 106, and GND2 107 are connected to the PCB copper clad laminate 2. By setting GND1 106 and GND2 107, GND1 106 is mainly used for the basic grounding of the antenna, and GND2 107 is used as a reserved return ground point, whose function is to improve the adjustability of the antenna;

[0024] The feed point 105 is connected to the coaxial cable 4 through the main path matching 3. By setting the coaxial cable 4, the coaxial cable 4 is a commonly used radio frequency transmission line with good shielding performance, which can effectively reduce the loss and external interference during signal transmission. Accurately welding the coaxial cable 4 to the specified position can ensure stable and efficient transmission of radio frequency signals between the antenna and the radio frequency circuit;

[0025] The main path matching 3 is connected to the PCB copper clad laminate 2. By setting the antenna body 1, since the antenna body 1 adopts a cavity design, the key points for tuning the antenna resonance point are the length, width and height of the cavity. By tuning the size combination, the wifi antenna bandwidth can be effectively improved, thereby optimizing the antenna performance and enhancing the user experience. The external dimensions of the cavity are about 50*25, and the height can be adjusted according to the actual antenna environment height. Adjusting the length of the long side can tune the resonance point of the 2.4 frequency band and finally tune the resonance to the target frequency band. Since the four surfaces of the first closed surface 101, the second closed surface 102, the third closed surface 103 and the fourth closed surface 104 in the antenna body 1 are closed, this structure helps to reduce the influence of external electromagnetic interference on the antenna performance, and at the same time can also play a certain role in constraining the electromagnetic field inside the antenna, improving the radiation efficiency and performance stability of the antenna. And because the bottom surface of the antenna body 1 is directly pasted on the PCB copper clad laminate 2, such a connection method can realize the electrical connection between the antenna and the circuit board, and with the help of the characteristics of the PCB copper clad laminate 2, provide a stable electrical reference plane for the antenna. Since one side of the antenna body 1 adjacent to the metal body is cleared, this is to avoid the adverse effect of the metal body on the radiation characteristics of the antenna. The antenna body 1 is coupled with the side of the metal body through the opening surface to achieve 2.4G resonance.

[0026] The WiFi antenna adopts a cavity design. One side of the WiFi antenna close to the feed point 105, GND1106 and GND2107 is cleared. One side of the WiFi antenna close to the feed point 105, GND1106 and GND2107 is coupled with the side of the metal body to achieve 2.4G resonance. GND1106 is set as the ground return matching. By adjusting the ground return matching reserved at the position of GND1106 and combining with the main path matching 3, the resonance frequency falls within the target frequency range. GND2107 is set as the reserved ground return point, which can improve the antenna tunability.

[0027] The working principle and usage process of the present invention: The antenna body 1 adopts a cavity design. The bottom surface of the antenna body 1 is directly pasted on the PCB copper clad laminate 2. One side adjacent to the metal body is cleared, and the antenna feed point 105 and GND1106 / GND2107 points are reserved. GND2107 is the reserved ground return point, which can improve the antenna tunability. It realizes 2.4G resonance through coupling with the metal side through the opening surface. By adjusting the ground return matching reserved at the position of GND1106 and combining with the main path matching 3, the resonance frequency falls within the target frequency range.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A WiFi antenna for a metal-body electronic product, comprising an antenna body (1), a PCB copper clad laminate (2), a main path matching (3) and a coaxial cable (4), characterized in that: The WiFi antenna includes a first closed surface (101), a second closed surface (102), a third closed surface (103), a fourth closed surface (104), a feed point (105), GND1 (106) and GND2 (107). The tops of the first closed surface (101), the second closed surface (102) and the fourth closed surface (104) are connected to the third closed surface (103). The bottoms of the first closed surface (101), the second closed surface (102) and the fourth closed surface (104) are connected to the PCB copper clad (2). Both ends of the fourth closed surface (104) are respectively connected to the first closed surface (101) and the second closed surface (102). The feed point (105), GND1 (106) and GND2 (107) are connected to the third closed surface (103). The bottoms of the feed point (105), GND1 (106) and GND2 (107) are connected to the PCB copper clad (2). The feed point (105) is connected to the coaxial cable (4) through the main path matching (3), and the main path matching (3) is connected to the PCB copper clad (2).

2. The WiFi antenna of an electronic product with a metal body according to claim 1, characterized in that: The WiFi antenna adopts a cavity design.

3. The WiFi antenna of a metal-body electronic product according to claim 1, characterized in that: The side of the WiFi antenna close to the feed point (105), GND1 (106) and GND2 (107) is subjected to clearance treatment, and the side of the WiFi antenna close to the feed point (105), GND1 (106) and GND2 (107) is coupled with the side of the metal body.

4. The WiFi antenna of a metal-body electronic product according to claim 1, wherein: The GND1 (106) is set for ground return matching.

5. The WiFi antenna of a metal-body electronic product according to claim 1, wherein: The GND2 (107) is set as a reserved ground return point.

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