Outdoor low-profile WiFi (Wireless Fidelity) 6E antenna

Abstract

An outdoor low-profile WiFi 6E antenna of the present invention comprises a PCB antenna radiator and an insulating support, the PCB antenna radiator comprises a substrate, the front surface of the substrate is provided with an antenna radiation circuit, the antenna radiation circuit is provided with a feed pad, the feed pad is electrically connected with an inner core of a corresponding coaxial cable, and the inner core of the coaxial cable is electrically connected with the insulating support. And the lower edge of the substrate is subjected to concave-convex cutting treatment to form a plurality of convex structures, so that the substrate is inserted and fixed with the groove structures on the insulating bracket through the convex structures. The antenna is designed according to the monopole principle, the coupling unit is used for adjusting the bandwidth and impedance, the antenna shows the ultra-wide bandwidth and omnidirectional characteristics in a small-size environment, the PCB antenna radiator, the insulating support, the metal connector and the non-metal shell are optimized, all the components are tightly attached, and the antenna has the advantages of being simple in structure and convenient to use. Therefore, the outdoor antenna can meet the use standard of the outdoor antenna, is fool-proof, and remarkably improves the antenna assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency and wireless communication, and particularly to an outdoor low-profile WiFi6E antenna. Background Art

[0002] WiFi6E is a new wireless local area network technology defined by the WiFi Alliance, designed for the 6GHz frequency band, aiming to provide higher speed and lower latency. Since the 6GHz frequency band has a larger bandwidth and less interference, WiFi6E can provide faster speed and better performance.

[0003] In the outdoor environment, the WiFi6E technology can provide better coverage and more stable connections. Its application environments can be stadiums, airports, parks, and some outdoor public places, meeting the needs of more users to connect simultaneously. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problems existing in the prior art, and provide an outdoor low-profile WiFi6E antenna, which can meet the applications in different harsh environments with the advantage of small occupied environmental space, and the antenna is designed to be omnidirectional under vertical polarization, capable of covering more space and enhancing the signal strength received by users.

[0005] To achieve the above technical purpose and reach the above technical effect, the present invention is realized through the following technical solutions:

[0006] An outdoor low-profile WiFi6E antenna includes a PCB antenna radiator and an insulating bracket. The PCB antenna radiator includes a substrate. An antenna radiation circuit is provided on the front surface of the substrate. A feeding soldering pad is provided on the antenna radiation circuit, and the feeding soldering pad is electrically connected to the inner core of the corresponding coaxial cable to transmit the radio frequency signal to the antenna for radiation and reception. The lower edge of the substrate is subjected to concave and convex cutting to form a plurality of convex structures, so that the substrate is inserted and fixed to the groove structure on the insulating bracket through the convex structures.

[0007] Further, a first coupling circuit coupled to the antenna radiation circuit is provided on the front surface of the substrate, so that a capacitive coupling is generated in the gap between the first coupling circuit and the antenna radiation circuit to increase the frequency bandwidth.

[0008] Further, a metal radiator is provided on the back surface of the substrate. The metal radiator is electrically connected to the antenna radiation circuit on the front surface of the substrate through a first metallized via to optimize the resonant impedance. A second coupling circuit is provided on the back surface of the substrate to increase the coupling energy between the antenna radiation circuit and the first coupling circuit and adjust the antenna bandwidth and impedance.

[0009] Further, a front metal pad is provided at the lower edge of the front side of the substrate, and the front metal pad is electrically connected to the outer braid of the coaxial cable.

[0010] Further, a back metal pad is provided at the lower edge of the back side of the substrate, and the back metal pad is electrically connected to the front metal pad through a second metallized via hole.

[0011] Further, the back metal pad is in a hook-like structure, which is convenient for electrically connecting and fixing the metal joint by welding, and the metal joint is sleeved in the insulating bracket.

[0012] Further, the insulating bracket includes an upper sleeve and a lower sleeve with different diameters, and the upper sleeve and the lower sleeve are connected by a plurality of support rib columns;

[0013] At least three connecting grooves are arranged on the upper sleeve at non-equidistant intervals, and at least three of the connecting grooves are correspondingly inserted and matched with at least three protruding structures on the substrate for anti-fooling and limiting;

[0014] An irregular avoidance hole is provided in the middle of the upper sleeve for avoiding a first connecting column and a second connecting column which are arranged in the middle of the top of the metal joint and extend out of the hole;

[0015] The first connecting column is welded to the front metal pad, the second connecting column is welded to the back metal pad, and the remaining parts of the first connecting column and the second connecting column are welded to the outer braid of the coaxial cable.

[0016] Further, a limiting protrusion is provided on the inner side wall of the lower sleeve, and a limiting groove is provided on the outer side wall of the metal joint and is matched with the limiting protrusion for restricting their relative positions. A plurality of sinking grooves corresponding to the support rib columns are provided on the top surface of the metal joint. When sleeved, the support rib columns are sunk into the corresponding sinking grooves for limiting and fixing.

[0017] Further, the insulating bracket is sleeved in a non-metallic housing, and a plurality of press-fit buckle slots are provided on the side wall of the non-metallic housing. A plurality of press-fit buckle teeth are provided on the outer side wall of the lower sleeve and are matched with the press-fit buckle slots, so that the insulating bracket and the non-metallic housing are tightly connected after being sleeved. A waterproof buffer gasket ring is provided at the bottom of the non-metallic housing.

[0018] Further, a U-shaped surrounding bone is provided in the non-metallic housing to prevent the reverse assembly of the PCB antenna radiator.

[0019] The beneficial effects of the present invention are:

[0020] The operating frequency band of the antenna of the present invention is 2400 - 2500 MHz and 4900 - 71250 MHz, which can perfectly cover the entire WiFi6E frequency band. The antenna is fed through a coaxial connection line. The PCB antenna radiator is designed using the monopole principle, and a coupling unit is introduced to adjust the frequency bandwidth and impedance, enabling the antenna to exhibit ultra-wide frequency bandwidth and omnidirectional characteristics in a small-size environment. Structurally, the PCB antenna radiator, insulating bracket, metal connector, and non-metallic housing are optimized, and each component is closely fitted to meet the outdoor antenna usage standard and prevent misassembly, significantly improving the antenna assembly efficiency. Description of the Drawings

[0021] Figure 1 Schematic diagram of the front structure of the PCB antenna radiator of the present invention;

[0022] Figure 2 Schematic diagram of the front structure of the PCB antenna radiator of the present invention;

[0023] Figure 3 Schematic diagram of the top view structure of the insulating bracket of the present invention;

[0024] Figure 4 Schematic diagram of the top view structure of the metal connector of the present invention;

[0025] Figure 5 Schematic diagram of the overall structure of the antenna after assembly of the present invention;

[0026] Figure 6 Schematic diagram of the exploded structure of the antenna components of the present invention;

[0027] Figure 7 Schematic diagram of the three-dimensional structure of the insulating bracket of the present invention;

[0028] Figure 8 Schematic diagram of the bottom view structure of the non-metallic housing of the present invention;

[0029] Figure 9 Schematic diagram of the three-dimensional structure of the non-metallic housing of the present invention;

[0030] Figure 10 VSWR diagram of the antenna of the present invention;

[0031] Figure 11 Antenna efficiency diagram of the present invention.

[0032] Description of reference numerals in the figure: A, PCB antenna radiator; A1, substrate; A11, first convex structure; A12, second convex structure; A13, third convex structure; A2, antenna radiation circuit; A21, feeding pad; A22, first metallized via hole; A3, first coupling circuit; A4, front metal pad; A41, second metallized via hole; A5, backplane; A6, back metal pad; A7, second coupling circuit; B, insulating bracket; B11, first connection groove; B12, second connection groove; B13, third connection groove; B2, avoidance hole; B21, upper sleeve; B22, lower sleeve; B23, press-fit latch teeth; B3, limiting protrusion; B4, support rib column; C, metal joint; C11, first connection column; C12, second connection column; C21, first sink; C22, second sink; C23, third sink; C24, fourth sink; C31, limiting groove; D, non-metallic housing; D1, press-fit latch groove; D2, U-shaped rib; D3, coordinate system positioning structure hole; E, waterproof buffer gasket ring. Detailed implementation manners

[0033] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0034] As Figures 1 to 4 shown, an outdoor low-profile WiFi6E antenna includes a PCB antenna radiator A and an insulating bracket B. The PCB antenna radiator A includes a substrate A1. In this embodiment, the overall shape of the substrate A1 is a cuboid, and the material is Fr4. The front surface of the substrate A1 is provided with an antenna radiation circuit A2. The antenna radiation circuit A2 is made of copper foil and is processed onto the substrate A1 through exposure and etching processes. The antenna radiation circuit A2 is integrally in a C-shaped bent structure to reduce the height of the entire antenna, and an irregular shape is made at the bent portion to adjust the resonant frequency and impedance of the antenna. A feeding pad A21 is provided on the antenna radiation circuit A2, and the OSP process can be used to prevent oxidation of the feeding pad A21. The feeding pad A21 is electrically connected to the inner core of the corresponding coaxial cable, and the electrical connection method can directly adopt a welding process to transmit the radio frequency signal to the antenna for radiation reception. The lower edge of the substrate A1 is subjected to concave-convex cutting to form a plurality of convex structures, and at least three convex structures can be set: a first convex structure A11, a second convex structure A12, and a third convex structure A13, so that the substrate A1 is inserted and fixed with the groove structure on the insulating bracket B through the convex structures. The distances between the convex structures are not equal. When cooperating with the corresponding groove structures, if the insertion direction is incorrect, it cannot be inserted, which can prevent misoperation.

[0035] As Figure 1As shown, on the front side of the substrate A1, there is a first coupling circuit A3 that is coupled to the antenna radiation circuit A2. The first coupling circuit A3 is made of metal copper foil and can be fabricated using the exposure and etching process. Its circuit exists independently and is not connected to other metals, enabling capacitive coupling to occur in the gap between the first coupling circuit A3 and the antenna radiation circuit A2 to increase the bandwidth.

[0036] As Figure 2 shown, on the back side of the substrate A1, there is a metal radiator A6. The shape of the metal radiator A6 is rectangular. The metal radiator A6 is electrically connected to the antenna radiation circuit A2 on the front side of the substrate A1 through the first metallized via A22 to optimize the resonant impedance, which is used to increase the coupling energy between the antenna radiation circuit A2 and the first coupling circuit A3 and adjust the antenna bandwidth and impedance.

[0037] On the lower edge of the front side of the substrate A1, there is a front metal pad A4. The front metal pad A4 is also processed using the OSP process to give it an anti-oxidation function. The front metal pad A4 is electrically connected to the outer braid of the coaxial cable.

[0038] On the lower edge of the back side of the substrate A1, there is a back metal pad A5, which is also subjected to OSP treatment. The back metal pad A5 is electrically connected to the front metal pad A4 through the second metallized via A41. The second metallized via A41 is a metal via arranged in a 4*4 pattern, which passes through the substrate A1 to connect the front metal pad A4 and the back metal pad A5 to form a conductive state.

[0039] The back metal pad A5 has a hook-like structure, which is convenient for electrically connecting and fixing the metal joint C by welding. The metal joint C is sleeved inside the insulating bracket B.

[0040] The insulating bracket B is made of plastic and is fabricated using an integrated injection molding process. As Figure 7 shown, the insulating bracket B includes an upper sleeve B21 and a lower sleeve B22 with different diameters. As Figure 3 and Figure 7 shown, the upper sleeve B21 and the lower sleeve B22 are connected by several support rib columns B4. There are four support rib columns B4, and the support rib columns B4 have a triangular structure. Their vertical sides are fixedly connected to the outer sidewall of the upper sleeve B21, and their horizontal sides are fixedly connected to the top wall of the lower sleeve B22;

[0041] As Figure 3 and Figure 7 shown, at least three connecting grooves are non-equidistantly arranged on the upper sleeve B21: a first connecting groove B11, a second connecting groove B12, and a third connecting groove B13, and they are respectively paired and inserted with a first protrusion structure A11, a second protrusion structure A12, and a third protrusion structure A13 for anti-fooling and limiting;

[0042] An irregular avoidance hole B2 is provided in the middle of the upper sleeve B21, as Figure 4 shown, for avoiding the first connection column C11 and the second connection column C12 which are arranged in the middle of the top of the metal joint C and extend out of the hole, and at the same time, enough operating space can be left for welding. In this embodiment, the first connection column C11 and the second connection column C12 are semi-cylinders;

[0043] The first connection column C11 is welded to the front metal pad A4, the second connection column C12 is welded to the back metal pad A5, and the remaining parts of the first connection column C11 and the second connection column C12 are welded to the outer braid of the coaxial cable.

[0044] As Figure 3 and Figure 4 shown, a limiting protrusion B3 is provided on the inner side wall of the lower sleeve B22, and a limiting groove C31 which is matched with the limiting protrusion B3 is provided on the outer side wall of the metal joint C for limiting their relative positions. A plurality of sinking grooves corresponding to the supporting rib columns B4 are provided on the top surface of the metal joint C: the first sinking groove C21, the second sinking groove C22, the third sinking groove C23, and the fourth sinking groove C24. When sleeved, the four supporting rib columns B4 respectively sink into the corresponding sinking grooves for limiting and fixing.

[0045] As Figure 5 、 Figure 6 、 Figure 7 and Figure 9 shown, the insulating bracket B is sleeved in the non-metallic housing D. The non-metallic housing D is made of Resin-945 material, which can well meet the UL94-5VA flame retardant requirement and ensure the integrity of the antenna. A plurality of press-fit buckle grooves D1 are provided on the side wall of the non-metallic housing D, and a plurality of press-fit buckle teeth B23 which are matched with the press-fit buckle grooves D1 are provided on the outer side wall of the lower sleeve B22, so that the insulating bracket B and the non-metallic housing D are tightly fitted and connected after being sleeved. A waterproof buffer gasket ring E is provided at the bottom of the non-metallic housing D. The waterproof buffer gasket ring E is made of TPU buffer plastic material. In this embodiment, after the non-metallic housing D and the insulating bracket B are assembled, DP460 glue is applied around and air-dried naturally for 24 hours, and then the waterproof buffer gasket ring E is installed at the bottom of the non-metallic housing D, which can effectively achieve IP65-level waterproofing.

[0046] As Figure 8As shown, a U-shaped surrounding bone D2 is provided inside the non-metal shell D. The U-shaped surrounding bone D2 can be fixed to the inner side of the top wall of the non-metal shell D. A coordinate system positioning structure hole D3 is formed on the top wall of the non-metal shell D corresponding to the opening position of the U-shaped surrounding bone D2. When assembling, a 1-mm gap is left between the U-shaped surrounding bone D1 and the PCB antenna radiator A. If the PCB antenna radiator A is assembled in the reverse direction, the non-metal shell D cannot be inserted and pressed, so as to prevent the reverse assembly of the PCB antenna radiator A.

[0047] As Figure 10 and Figure 11 shown, the antenna standing wave ratio VSWR is less than 2 as a whole in the range of 2400 - 2500 MHz and less than 2.5 as a whole in the range of 4900 - 7125 MHz; the average efficiency is greater than 80% in the range of 2400 - 2500 MHz and greater than 64% in the range of 4900 - 7125 MHz.

[0048] In addition, it should be noted that unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are only used to distinguish each component, element, step, etc. in the specification, rather than to represent the logical relationship or sequential relationship, etc. between each component, element, step.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An outdoor low-profile WiFi6E antenna, comprising a PCB antenna radiator (A) and an insulating bracket (B), wherein the PCB antenna radiator (A) includes a substrate (A1), an antenna radiation circuit (A2) is provided on the front surface of the substrate (A1), a feeding solder pad (A21) is provided on the antenna radiation circuit (A2), and the feeding solder pad (A21) is electrically connected to the inner core of a corresponding coaxial cable to transmit radio frequency signals to the antenna for radiation reception, characterized in that, The lower edge of the substrate (A1) is subjected to concave-convex cutting to form a number of convex structures, so that the substrate (A1) is plugged and fixed to the groove structure on the insulating bracket (B) through the convex structures.

2. The outdoor low-profile WiFi6E antenna according to claim 1, wherein, The front surface of the substrate (A1) is provided with a first coupling circuit (A3) that is coupled to the antenna radiation circuit (A2), so that a capacitive coupling is generated in the gap between the first coupling circuit (A3) and the antenna radiation circuit (A2) to increase the bandwidth.

3. The outdoor low-profile WiFi6E antenna according to claim 1, wherein The back surface of the substrate (A1) is provided with a metal radiator (A6), and the metal radiator (A6) is electrically connected to the antenna radiation circuit (A2) on the front surface of the substrate (A1) through a first metallized via (A22) to optimize the resonant impedance. The back surface of the substrate (A1) is provided with a second coupling circuit (A7) for increasing the coupling energy between the antenna radiation circuit (A2) and the first coupling circuit (A3) and adjusting the antenna bandwidth and impedance.

4. The outdoor low-profile WiFi6E antenna according to claim 1, characterized in that, The lower edge of the front surface of the substrate (A1) is provided with a front metal pad (A4), and the front metal pad (A4) is electrically connected to the outer braid of the coaxial cable.

5. The outdoor low-profile WiFi6E antenna according to claim 4, wherein, The lower edge of the back surface of the substrate (A1) is provided with a back metal pad (A5), and the back metal pad (A5) is electrically connected to the front metal pad (A4) through a second metallized via (A41).

6. The outdoor low-profile WiFi6E antenna according to claim 5, characterized in that, The back metal pad (A5) is in a hook shape, which is convenient for electrically connecting and fixing the metal joint (C) by welding, and the metal joint (C) is sleeved in the insulating bracket (B).

7. The outdoor low-profile WiFi6E antenna according to claim 6, wherein, The insulating bracket (B) includes an upper sleeve (B21) and a lower sleeve (B22) with different diameters, and the upper sleeve (B21) and the lower sleeve (B22) are connected by a number of support rib columns (B4); At least three connecting grooves are arranged on the upper sleeve (B21) at non-equidistant positions, and at least three of the connecting grooves are correspondingly plugged and matched with at least three convex structures on the substrate (A1) for anti-fooling and limiting; An avoidance hole (B2) is arranged in the middle of the upper sleeve (B21) for avoiding a first connecting column (C11) and a second connecting column (C12) which are arranged in the middle of the top of the metal joint (C) and extend out of the hole; The first connecting column (C11) is welded to the front metal pad (A4), the second connecting column (C12) is welded to the back metal pad (A5), and the remaining parts of the first connecting column (C11) and the second connecting column (C12) are welded to the outer braid of the coaxial cable.

8. The outdoor low-profile WiFi6E antenna according to claim 7, wherein A limiting protrusion (B3) is arranged on the inner side wall of the lower sleeve (B22), and a limiting groove (C31) that is matched with the limiting protrusion (B3) is arranged on the outer side wall of the metal joint (C) for limiting their relative positions. A number of sinking grooves corresponding to the support rib columns (B4) are arranged on the top surface of the metal joint (C). When sleeved, the support rib columns (B4) are sunk into the corresponding sinking grooves for limiting and fixing.

9. The outdoor low-profile WiFi6E antenna according to claim 8, wherein, The insulating bracket (B) is sleeved in the non-metallic housing (D). A number of press-fit snap grooves (D1) are provided on the side wall of the non-metallic housing (D). A number of press-fit snap teeth (B23) that cooperate with the press-fit snap grooves (D1) are provided on the outer side wall of the lower layer sleeve (B22), so that after the insulating bracket (B) is sleeved with the non-metallic housing (D), they are tightly connected. A waterproof buffer gasket ring (E) is provided at the bottom of the non-metallic housing (D).

10. The outdoor low-profile WiFi6E antenna according to claim 9, wherein A U-shaped rib (D2) is provided in the non-metallic housing (D) to prevent reverse assembly of the PCB antenna radiator (A).

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