WIFI built-in antenna

Abstract

The utility model relates to the technical field of antennas, and particularly discloses a WIFI built-in antenna which comprises a bottom plate, a copper-clad wire and a coaxial line, the copper-clad wire is arranged on the bottom plate, one end of the copper-clad wire is provided with a radiation array, the other end of the copper-clad wire is provided with a ground array, and the ground array and the radiation array are oppositely arranged; a feed point and a ground point are arranged at the middle lower part of the copper-clad wire at an interval, and the feed point is close to the radiation oscillator; the coaxial line comprises an outer skin, a conductive layer, an insulating layer and an inner conductor which are sequentially arranged from outside to inside, the inner conductor is connected with the feed point, and the conductive layer is connected with a ground point. The WIFI built-in antenna has the effect of improving the problem that a WIFI built-in antenna with relatively high performance in a relatively poor antenna environment is needed.

Description

Technical Field

[0001] This application relates to the technical field of antennas, and in particular to a WIFI built-in antenna. Background Art

[0002] With the continuous rise and development of wireless networks, the application fields of WIFI modules are becoming more and more extensive. In a WIFI module, a WIFI antenna is an essential device.

[0003] WIFI antennas are divided into WIFI built-in antennas and WIFI external antennas. Among them, the performance of WIFI external antennas is better, but they occupy a large space and affect the aesthetics. WIFI built-in antennas occupy less space, but their performance is much worse. Especially as there are more and more various integrated components on the device, the antenna clearance is continuously compressed, the antenna environment deteriorates, and the area decreases, resulting in worse performance. Therefore, a WIFI built-in antenna with high performance in a poor antenna environment is needed. Utility Model Content

[0004] In order to solve the problem of needing a WIFI built-in antenna with high performance in a poor antenna environment, this application provides a WIFI built-in antenna.

[0005] A WIFI built-in antenna provided by this application adopts the following technical solutions:

[0006] A WIFI built-in antenna includes a bottom plate, copper-clad traces, and a coaxial cable. The copper-clad traces are arranged on the bottom plate. One end of the copper-clad traces is provided with a radiation element, and the other end is provided with a ground element. The ground element and the radiation element are arranged opposite to each other. At the middle and lower parts of the copper-clad traces, a feeding point and a grounding point are arranged at intervals, and the feeding point is close to the radiation element. The coaxial cable includes an outer skin, a conductive layer, an insulating layer, and an inner conductor arranged in sequence from outside to inside. The inner conductor is connected to the feeding point, and the conductive layer is connected to the grounding point.

[0007] By adopting the above technical solutions, the coaxial cable is connected to the feeding point through the inner conductor to energize the copper-clad traces for radiating and receiving electromagnetic waves. The setting of the radiation element is used to control the frequency offset of 2.4G. The connection of the conductive layer to the grounding point is used for grounding to improve the anti-electromagnetic wave interference ability and lightning protection ability of the antenna of this application. The setting of the ground element can improve the antenna gain and the antenna efficiency of the radiation element. The overall structure is compact, and the performance stability of the antenna in a poor environment is improved.

[0008] Optionally, the length of the copper-clad traces between the feeding point and the grounding point is one-quarter wavelength of the 2.4G frequency band.

[0009] By adopting the above technical solution, the length of the copper-clad trace between the feeding point and the grounding point is set to tune the 50-ohm impedance of the antenna, ensuring maximum power transfer during signal transmission, reducing signal reflection and interference, thereby improving the efficiency and stability of signal transmission.

[0010] Optionally, conductive tails extend from both the radiation element and the ground element, and the two conductive tails face each other.

[0011] By adopting the above technical solution, the cooperative setting of the two conductive tails increases the overall anti-interference ability and adjustability of the antenna.

[0012] Optionally, clearance grooves are provided on the periphery of the grounding point on the bottom plate.

[0013] By adopting the above technical solution, the setting of the clearance grooves can adjust the antenna impedance resonance and obtain higher radiation efficiency.

[0014] Optionally, antioxidant layers are provided at the connections of the coaxial cable with the feeding point and the grounding point.

[0015] By adopting the above technical solution, the setting of the antioxidant layers can not only enhance the stability of the connection between the coaxial cable and the feeding point and the grounding point, but also play a role in protecting the metal lines.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The inner conductor of the coaxial cable is connected to the copper-clad trace through the feeding point for radiating and receiving electromagnetic waves, and the conductive layer of the coaxial cable is connected to the grounding point for grounding, improving the anti-interference ability and lightning protection ability of the antenna; the radiation element at one end of the copper-clad trace is used to control the frequency offset of 2.4G, and the ground element at the other end is used to improve the antenna gain. The antenna structure of the present application is compact, improving the performance stability of the antenna in a poor environment.

[0018] 2. The setting that the length of the copper-clad trace between the feeding point and the grounding point is one-quarter wavelength of the 2.4G frequency band can tune the 50-ohm impedance of the antenna, ensuring maximum power transfer during signal transmission, reducing signal reflection and interference, thereby improving the efficiency and stability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0021] Figure 2 is a schematic cross-sectional view of the coaxial cable in this application;

[0022] Reference numerals: 1, bottom plate; 11, clearance groove; 2, copper-clad trace; 3, coaxial cable; 31, inner conductor; 32, insulating layer; 33, conductive layer; 34, outer sheath; 4, feed point; 5, ground point; 6, radiation element; 7, ground element; 8, conductive tail. Detailed implementation manners

[0023] The following further elaborates on this application in conjunction with the Figure 1-2 drawings.

[0024] An embodiment of this application discloses a built-in WIFI antenna. Referring to Figure 1-2 , the built-in WIFI antenna includes a bottom plate 1, a copper-clad trace 2, and a coaxial cable 3. The bottom plate 1 is made of a flexible insulating substrate, the bottom plate 1 is rectangular, and the copper-clad trace 2 is laid and fixed on the surface of the bottom plate 1. A non-closed rectangular structure is wound around the middle of the copper-clad trace 2, and a feed point 4 and a ground point 5 are arranged at intervals on the surface of the rectangular structure.

[0025] The coaxial cable 3 includes an inner conductor 31 and an insulating layer 32, a conductive layer 33, and an outer sheath 34 that are sequentially wrapped layer by layer. During use, the end of the coaxial cable 3 is peeled layer by layer to form a stepped shape, the inner conductor 31 is welded and fixed to the feed point 4, the conductive layer 33 is welded and fixed to the ground point 5, and antioxidant layers are covered at the welding joints of the coaxial cable 3 with the feed point 4 and the ground point 5 to improve the connection strength and extend the service life. The copper-clad trace 2 is connected to the inner conductor 31 for radiating and receiving electromagnetic waves; the conductive layer 33 is connected to the ground point 5 for grounding, improving the anti-electromagnetic wave interference ability and lightning protection ability of the antenna of this application.

[0026] Furthermore, the length of the copper-clad trace 2 between the feed point 4 and the ground point 5 is set to be one-quarter wavelength of the 2.4G frequency band. This length setting is used to tune the 50-ohm impedance of the antenna, ensure that the signal reaches the maximum power transmission during transmission, reduce signal reflection and interference, and thus improve the efficiency and stability of signal transmission.

[0027] In addition, a radiation element 6 extends integrally upward at one end of the copper-clad trace 2 close to the feed point 4, and the main path formed by the cooperation of the radiation element 6 and the copper-clad trace 2 is used to control the frequency deviation of 2.4G. Another end of the copper-clad trace 2 extends integrally upward to form a ground element 7. The ground element 7 is parallel and opposite to the end of the radiation element 6. The setting of the ground element 7 can improve the antenna gain and the antenna efficiency of the radiation element 6. The built-in WIFI antenna of this application has a compact structure, high signal reception and radiation efficiency, and stable performance in a poor environment.

[0028] Further, conductive tails 8 extend downwardly from both the radiation element 6 and the ground element 7, and the two conductive tails 8 are arranged oppositely. The cooperative arrangement of the two conductive tails 8 increases the overall anti-interference ability and adjustability of the antenna.

[0029] In addition, in order to adjust the antenna impedance resonance to obtain higher radiation efficiency, an air clearance groove 11 is formed on the periphery of the ground point 5 on the bottom plate 1.

[0030] The implementation principle of the WIFI built-in antenna in the embodiment of the present application is as follows: during use, the end of the coaxial cable 3 is stripped in a stepped manner, and then the feeding point 4 of the copper-clad trace 2 is connected to the inner conductor 31 for radiating and receiving electromagnetic waves. The ground point 5 of the copper-clad trace 2 is welded and fixed to the conductive layer 33 for grounding, improving the anti-electromagnetic interference ability and lightning protection ability of the antenna of the present application. Then, the periphery of the ground point 5 on the bottom plate 1 is cut to form an air clearance groove 11 for adjusting the antenna impedance resonance to obtain higher radiation efficiency. In addition, the main path formed by the cooperation of the radiation element 6 and the copper-clad trace 2 is used to control the frequency deviation of 2.4G; the ground element 7 is used to improve the antenna gain and the antenna efficiency of the radiation element 6; the two conductive tails 8 are cooperatively arranged to increase the overall anti-interference ability and adjustability of the antenna. The WIFI built-in antenna of the present application has a compact structure, and the cooperative arrangement of each structure enables it to have higher performance in a poor antenna environment.

[0031] The above are all optional embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A WIFI internal antenna, characterized by: The invention comprises a base plate (1), a copper-clad wiring (2) and a coaxial line (3), wherein the copper-clad wiring (2) is arranged on the base plate (1), a radiating array (6) is arranged at one end of the copper-clad wiring (2), and a ground array (7) is arranged at the other end of the copper-clad wiring (2), wherein the ground array (7) is arranged opposite to the radiating array (6); a feeding point (4) and a ground point (5) are arranged at intervals in the middle and lower part of the copper-clad wiring (2), wherein the feeding point (4) is close to the radiating array (6); and the coaxial line (3) comprises an outer skin (34), a conductive layer (33), an insulating layer (32) and an inner conductor (31) which are arranged in sequence from the outside to the inside, wherein the inner conductor (31) is connected to the feeding point (4), and the conductive layer (33) is connected to the ground point (5).

2. The WIFI internal antenna according to claim 1, characterized in that: The length of the copper-clad wiring (2) between the feed point (4) and the location (5) is one quarter of the wavelength of the 2.4G frequency band.

3. The WIFI internal antenna according to claim 1, characterized in that: Conductive tails (8) are extended from both the radiation array (6) and the ground array (7), and the two conductive tails (8) are opposite to each other.

4. The WIFI internal antenna according to claim 1, characterized in that: A clearance groove (11) is provided around the location (5) on the bottom plate (1).

5. The WIFI internal antenna according to claim 1, characterized in that: The coaxial line (3) is provided with an anti-oxidation layer at the connection points with the feed point (4) and the location (5).

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