A WiFi antenna device

Abstract

The utility model discloses a kind of WiFi antenna devices, comprising: PCB board, one side of PCB board is equipped with first ground radiation stub and multiple main radiation stub, multiple main radiation stub includes: first radiation stub, with low-frequency operating band, low-frequency operating band is 2.4GHz-2.485GHz, and is connected with first ground radiation stub;Second radiation stub, with intermediate-frequency operating band and high-frequency operating band, intermediate-frequency operating band is 5.15GHz-5.85GHz, high-frequency operating band is 5.925GHz-7.125GHz, and is connected with first ground radiation stub.The utility model can improve the overall coverage of vehicle-mounted wireless signal, while realizing the effect of low profile miniaturization.

Description

Technical Field

[0001] This utility model relates to the automotive field, and in particular to a WiFi antenna device. Background Technology

[0002] In the era of intelligent connected vehicles, ensuring stable and efficient data exchange between the vehicle and its surroundings has become a core challenge. Antennas, as the transceiver unit for all wireless signals, are the "first line of defense" against this challenge. Whether it's real-time vehicle positioning or communication with the external environment, everything relies heavily on antenna performance. A poorly performing antenna can become a bottleneck for the entire intelligent system, directly impacting user experience and even driving safety. To address this challenge, automotive antenna technology is undergoing rapid innovation: on the one hand, miniaturization and conformal design are solving space and aesthetic issues; on the other hand, customized development is providing solutions for specific pain points such as high shock resistance, multi-band operation, and high gain, ensuring antenna reliability even in complex and ever-changing in-vehicle environments.

[0003] Currently, mass-produced WiFi antenna devices are limited to the traditional WiFi 2.4GHz and 5GHz bands, and do not support the latest WiFi 7 standard. Furthermore, these WiFi antenna devices have low antenna gain and efficiency, resulting in overall performance that fails to meet the stringent requirements of domestic customers for next-generation wireless connectivity.

[0004] Therefore, there is an urgent need to produce a low-profile, miniaturized WiFi antenna device that can improve the overall coverage of in-vehicle wireless signals. Utility Model Content

[0005] The purpose of this invention is to solve the problems of current WiFi antenna devices being unable to cover multiple frequency bands and having a high structural profile. This invention provides a WiFi antenna device that can improve the comprehensive coverage of vehicle-mounted wireless signals while achieving a low-profile and miniaturized effect.

[0006] To address the aforementioned technical problems, this utility model discloses a WiFi antenna device, comprising: a PCB board, wherein one side of the PCB board is provided with a first grounding radiating branch and a plurality of main radiating branches, the plurality of main radiating branches including:

[0007] The first radiating branch has a low-frequency operating band of 2.4GHz-2.485GHz and is connected to the first grounding radiating branch.

[0008] The second radiating branch has a medium-frequency operating band and a high-frequency operating band, wherein the medium-frequency operating band is 5.15GHz-5.85GHz and the high-frequency operating band is 5.925GHz-7.125GHz, and is connected to the first grounding radiating branch.

[0009] By employing the above technical solution and setting up first and second radiating stubs, coverage of three frequency bands is achieved: the 2.4GHz band (2.4-2.485GHz), the 5GHz band (5.15-5.85GHz), and the 6GHz band (5.925-7.125GHz). Within the operating frequency bands, it exhibits excellent electrical performance, with a voltage standing wave ratio (VSWR) of less than 1.7, a gain greater than 1 dBi, and good omnidirectionality. Furthermore, it overcomes the vehicle installation limitations imposed by the bulky size of traditional antennas, significantly improving layout flexibility within the limited space of the vehicle interior. In addition, this solution supports multi-antenna collaborative operation, effectively compensating for the radiation blind spots of individual antennas through intelligent networking, thereby achieving comprehensive, dead-zone-free signal coverage. Ultimately, this solution provides an ideal antenna element for in-vehicle WiFi / BT / BLE communication systems, combining high gain, high stability, and a compact structure, which can be easily integrated into any small space within the vehicle.

[0010] In other words, this WiFi antenna device has a small overall size, simple structure, is easy to process and produce, and has low manufacturing cost. Therefore, this WiFi antenna device can be well applied to tri-band WiFi antennas and terminals in the 2.4GHz, 5GHz, and 6GHz frequency bands, combining the advantages of tri-band operation, miniaturization, and superior performance.

[0011] That is, this WiFi antenna device has at least the following advantages:

[0012] 1. The antenna is printed using double-sided PCB printing technology, which is easy to manufacture and has low production costs.

[0013] 2. Compared to mass-produced WiFi products, it has a stable structure and high radiation gain efficiency.

[0014] 3. PIFA broadband technology enables the tri-band broadband antenna required for WiFi 7.

[0015] 4. The overall dimensions of the PCB board are 30 mm × 20 mm × 1 mm. This antenna does not require a large ground plane structure and has a compact overall size. Compared with traditional bottom-fed antennas, this antenna does not require vertical SMA connectors and feed lines, which reduces the antenna's profile height.

[0016] 5. It can be installed in multiple locations inside the vehicle to achieve MIMO (Multiple-Input, Multiple-Output) communication.

[0017] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device, which further includes a matching stub, wherein the matching stub includes a first arm and a second arm, wherein...

[0018] The first arm extends along the width direction of the PCB board, one end of the first arm is connected to the first grounding radiation branch, and the other end is connected to the second arm;

[0019] The second arm is perpendicular to the first arm, and the second arm and the first grounding radiation branch are spaced apart along the width direction of the PCB board to form a first coupling gap.

[0020] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device, wherein the width of the first coupling gap is 1.51 mm and the length is 13 mm, the width of the first arm is 6 mm, and the width of the second arm is 3 mm.

[0021] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device, wherein the main radiating branch includes a third arm and a fourth arm, wherein,

[0022] The third arm extends along the width direction of the PCB board and is perpendicular to and connected to the second arm and the fourth arm respectively to form a second coupling gap;

[0023] The fourth arm extends along the length of the PCB board, and the length of the fourth arm extending along the length of the PCB board is greater than the length of the second arm extending along the length of the PCB board. The third arm and the fourth arm together form the first radial branch.

[0024] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device, wherein the main radiating branch further includes a fifth arm, the fifth arm extends along the length direction of the PCB board, one end of the fifth arm is flush with one end of the fourth arm and connected to the fourth arm, the length of the fifth arm extending along the length direction of the PCB board is less than the length of the fourth arm extending along the length direction of the PCB board to form a notch, and the third arm and the fifth arm together form the second radiating branch.

[0025] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device, wherein the fourth arm has a length of 22mm and a width of 6.5mm, the second coupling gap has a width of 1.5mm, and the third arm has a width of 5.5mm.

[0026] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device, wherein the length of the notch is 7mm and the width is 2.65mm.

[0027] According to another specific embodiment of the present invention, a second grounding radiation branch is provided on the other side of the PCB board and is arranged opposite to the first grounding radiation branch. The second grounding radiation branch has a clearance area with a length of 9.03 mm and a width of 1.78 mm. The length of the second grounding radiation branch on the left side of the clearance area is 12.54 mm, the length of the second grounding radiation branch on the right side of the clearance area is 8.43 mm, and the width of the second grounding radiation branch is 7.39 mm.

[0028] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device. The clearance area is provided with an L-shaped antenna feed point. The L-shaped antenna feed point includes a first segment and a second segment. The first segment is perpendicular to the second segment. The length of the first segment is 6.4 mm and the width is 1.3 mm. The length of the clearance area on the left side of the first segment is 2.06 mm, the length of the clearance area on the right side of the first segment is 0.57 mm, and the distance between the bottom wall of the first segment and the bottom wall of the clearance area is 0.48 mm. The second segment is connected to the right side of the first segment. The length of the second segment is 1.86 mm and the width is 0.5 mm.

[0029] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a WiFi antenna device, which further includes an upper cover and a lower cover, wherein the upper cover and the lower cover are connected to form an installation space, and the PCB board is disposed in the installation space.

[0030] To make the above-mentioned contents of this utility model more obvious and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0031] Figure 1 A perspective view of the WiFi antenna device provided by this utility model is shown;

[0032] Figure 2 A cross-sectional view of the WiFi antenna device provided by this utility model is shown;

[0033] Figure 3 A perspective view of the PCB board of the WiFi antenna device provided by this utility model is shown.

[0034] Figure 4A Show Figure 3 A front view of the PCB board;

[0035] Figure 4B Show Figure 3 The reverse side view of the PCB board;

[0036] Figure 5 An enlarged view of the L-shaped antenna feed point is shown;

[0037] Figure 6A This invention provides a voltage standing wave ratio (VSWR) diagram for the WiFi antenna device.

[0038] Figure 6B This diagram illustrates the overall efficiency of the WiFi antenna device provided by this invention.

[0039] Figure 7 This diagram shows the possible installation locations of the WiFi antenna device provided by this utility model.

[0040] Figure 8A When the WiFi antenna device provided by this utility model is installed in Location1, it presents an omni-beam pattern with omnidirectional coverage in the 2400-2485MHz frequency band.

[0041] Figure 8B When the WiFi antenna device provided by this utility model is installed in Location1, it presents an omni-beam pattern with omnidirectional coverage in the 5150-5850MHz frequency band.

[0042] Figure 8C When the WiFi antenna device provided by this utility model is installed in Location1, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band.

[0043] Figure 9A When the WiFi antenna device provided by this utility model is installed in Location2, it presents an omni-beam pattern with omnidirectional coverage in the 2400-2485MHz frequency band.

[0044] Figure 9B When the WiFi antenna device provided by this utility model is installed in Location2, it presents an omni-beam pattern with omnidirectional coverage in the 5150-5850MHz frequency band.

[0045] Figure 9C When the WiFi antenna device provided by this utility model is installed in Location2, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band.

[0046] Figure 10A When the WiFi antenna device provided by this utility model is installed in Location3, it presents an omni-beam pattern with omnidirectional coverage in the 2400-2485MHz frequency band.

[0047] Figure 10BWhen the WiFi antenna device provided by this utility model is installed in Location3, it presents an omni-beam pattern with omnidirectional coverage in the 5150-5850MHz frequency band.

[0048] Figure 10C When the WiFi antenna device provided by this utility model is installed in Location3, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band.

[0049] Figure 11A When the WiFi antenna device provided by this utility model is installed in Location4, it presents an omni-beam pattern with omnidirectional coverage in the 2400-2485MHz frequency band.

[0050] Figure 11B When the WiFi antenna device provided by this utility model is installed in Location4, it presents an omni-beam pattern with omnidirectional coverage in the 5150-5850MHz frequency band.

[0051] Figure 11C When the WiFi antenna device provided by this utility model is installed in Location4, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band.

[0052] Figure 12A When the WiFi antenna device provided by this utility model is installed in Location5, it presents an omni-beam pattern with omnidirectional coverage in the 2400-2485MHz frequency band.

[0053] Figure 12B When the WiFi antenna device provided by this utility model is installed in Location5, it presents an omni-beam pattern with omnidirectional coverage in the 5150-5850MHz frequency band.

[0054] Figure 12C When the WiFi antenna device provided by this utility model is installed in Location5, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band.

[0055] Figure 13A The WiFi antenna device provided by this utility model, when installed in Location16, exhibits an omni-beam pattern with omnidirectional coverage in the 2400-2485MHz frequency band.

[0056] Figure 13BWhen the WiFi antenna device provided by this utility model is installed in Location6, it presents an omni-beam pattern with omnidirectional coverage in the 5150-5850MHz frequency band.

[0057] Figure 13C The WiFi antenna device provided by this utility model, when installed in Location6, exhibits an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band.

[0058] In the attached figures, the following labels are used:

[0059] 100. Top cover;

[0060] 200. Bottom cover; 201. Installation space; 202. Fastener;

[0061] 300, PCB board; 310, First grounding radiating stub; 320, Main radiating stub; 321, First radiating stub; 322, Second radiating stub; 323, Third arm; 324, Fourth arm; 325, Second coupling slot; 326, Fifth arm; 327, Notch; 330, Matching stub; 331, First arm; 332, Second arm; 333, First coupling slot; 340, Second grounding radiating stub; 341, Clearance area; 350, L-shaped antenna feed point; 351, First segment; 352, Second segment; 353, Feed hole; 360, Feed through hole;

[0062] 400. Connector. Detailed Implementation

[0063] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0064] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0065] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0066] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0067] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0068] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0069] This application provides a WiFi antenna device, see reference. Figure 1 and Figure 2 The WiFi antenna device includes: an upper cover 100, a PCB board 300, a lower cover 200, and a connector 400. The upper cover 100 and the lower cover 200 are connected by a snap fastener 202 to form an installation space 201. The PCB board 300 is disposed in the installation space 201. Part of the connector 400 is disposed inside the installation space 201 and connected to the PCB board 300. The other part of the connector 400 is disposed outside the installation space 201.

[0070] The PCB (Printed Circuit Board) 300, also known as a printed circuit board, is an important electronic component. It serves as the support for electronic components and the carrier for their electrical interconnection. The PCB 300 illustrated in this embodiment is rectangular, measuring 30mm (length) * 20mm (width) and 1mm thick. It is made of FR4 material, which has a dielectric constant of 4.2 and a loss tangent of 0.02. Its cost advantage, combined with this compact design, makes the entire WiFi antenna device small and easy to integrate into other devices. It is understood that the shape of the PCB 300 can also be adjusted to a circular, polygonal, or other irregular structure as needed.

[0071] For example, refer to Figure 3 and Figure 4A The PCB board 300 has a first grounding radiating branch 310 and multiple main radiating branches 320 on the side facing the top cover 100. The multiple main radiating branches 320 include: a first radiating branch 321 and a second radiating branch 322. The first radiating branch 321 has a low-frequency operating band of 2.4GHz-2.485GHz and is connected to the first grounding radiating branch 310. The second radiating branch 322 has a medium-frequency operating band of 5.15GHz-5.85GHz and a high-frequency operating band of 5.925GHz-7.125GHz and is connected to the first grounding radiating branch 310.

[0072] By employing the above technical solution and setting up a first radiating stub 321 and a second radiating stub 322, coverage of three frequency bands can be achieved: the 2.4GHz band (2.4-2.485GHz), the 5GHz band (5.15-5.85GHz), and the 6GHz band (5.925-7.125GHz). Within the operating frequency bands, it exhibits excellent electrical performance, with a voltage standing wave ratio (VSWR) of less than 1.7, a gain greater than 1 dBi, and good omnidirectionality. Furthermore, the antenna structure is small in overall size, simple in design, easy to process and manufacture, and has low manufacturing costs. Therefore, this WiFi antenna device can be well applied to tri-band WiFi antenna devices and terminals in the 2.4GHz, 5GHz, and 6GHz frequency bands, combining the advantages of tri-band operation, miniaturization, and superior performance.

[0073] For example, the WiFi antenna device further includes a matching stub 330, which includes a first arm 331 and a second arm 332, wherein the first arm 331 is along the width direction of the PCB board 300 (i.e., Figure 3 Extending in the Y direction (as shown), one end of the first arm 331 is connected to the first grounding radiating stub 310, and the other end is connected to the second arm 332; the second arm 332 is perpendicular to the first arm 331, and the second arm 332 and the first grounding radiating stub 310 are connected along the width direction of the PCB board 300 (i.e., along the Y direction). Figure 3 The Y-direction (as shown) is spaced apart to form a first coupling gap 333.

[0074] For example, the width W1 of the first coupling gap 333 is 1.51 mm and the length L1 is 13 mm, the width W2 of the first support arm 331 is 6 mm, and the width W3 of the second support arm 332 is 3 mm.

[0075] For example, the main radiating branch 320 includes a third arm 323 and a fourth arm 324, wherein the third arm 323 is along the width direction of the PCB board 300 (i.e., Figure 3Extending along the Y direction shown, and perpendicular to and connected to the second arm 332 and the fourth arm 324 respectively, to form a second coupling gap 325; the fourth arm 324 extends along the length direction of the PCB board 300 (i.e., along the Y direction shown), and is perpendicular to and connected to the second arm 332 and the fourth arm 324 respectively, to form a second coupling gap 325; Figure 3 The fourth arm 324 extends along the length of the PCB board 300, and the length of the fourth arm 324 extending along the length of the PCB board 300 is greater than the length of the second arm 332 extending along the length of the PCB board 300. The third arm 323 and the fourth arm 324 together form the first radial branch 321.

[0076] For example, the main radiating branch 320 also includes a fifth arm 326, which extends along the length of the PCB board 300 (i.e., Figure 3 Extending along the X direction shown, one end of the fifth arm 326 is flush with one end of the fourth arm 324 and connected to the fourth arm 324. The fifth arm 326 extends along the length of the PCB board 300 (i.e., along the X direction shown). Figure 3 The length of the extension in the X direction shown is less than the length of the fourth arm 324 extending along the length direction of the PCB board 300, so as to form a notch 327. The third arm 323 and the fifth arm 326 together form the second radial branch 322.

[0077] For example, the length L2 of the fourth arm 324 is 22mm and the width W4 is 6.5mm, the width W5 of the second coupling gap 325 is 1.5mm, and the width W6 of the third arm 323 is 5.5mm.

[0078] For example, the length L3 of the notch 327 is 7 mm and the width W7 is 2.65 mm.

[0079] For example, refer to Figure 4B On the other side of the PCB board 300, a second grounding radiation branch 340 is provided, which is opposite to the first grounding radiation branch 310. The second grounding radiation branch 340 has a clearance area 341. The length L4 of the clearance area 341 is 9.03mm and the width W8 is 1.78mm. The length L5 of the second grounding radiation branch 340 on the left side of the clearance area 341 is 12.54mm, and the length L6 of the second grounding radiation branch 340 on the right side of the clearance area 341 is 8.43mm. The width W9 of the second grounding radiation branch 340 is 7.39mm.

[0080] For example, refer to Figure 5The clearance area 341 is provided with an L-shaped antenna feed point 350, which is electrically connected to the second arm 332 through a feed hole 353. The L-shaped antenna feed point 350 includes a first segment 351 and a second segment 352. The first segment 351 is perpendicular to the second segment 352. The length L7 of the first segment 351 is 6.4 mm and the width W10 is 1.3 mm. The length L8 of the clearance area 341 on the left side of the first segment 351 is 2.06 mm, and the length L9 of the clearance area 341 on the right side of the first segment 351 is 0.57 mm. The distance H1 between the bottom wall of the first segment 351 and the bottom wall of the clearance area 341 is 0.48 mm. The second segment 352 is connected to the right side of the first segment 351. The length L10 of the second segment 352 is 1.86 mm and the width W11 is 0.5 mm.

[0081] For example, the WiFi antenna device also includes forty-three spaced power feed holes 360, but is not limited thereto. The number of power feed holes 360 may also be thirty, forty-five, fifty, or more. The power feed holes 360 pass through the first grounding radiating branch 310, the PCB board 300, and the second grounding radiating branch 340.

[0082] The WiFi antenna device in this embodiment uses double-sided PCB printing technology, which is easy to manufacture. The multiple bends of the main radiating branch reduce the height of the antenna radiator. The pads on the other side of the PCB board 300 serve as the antenna feed point. The cable of the connector is soldered to the feed point and connected to the in-vehicle host through the cable.

[0083] Meanwhile, the WiFi antenna device of this application embodiment achieves a breakthrough in electrical dimensions. Traditional antennas require a physical size of 0.5λ to achieve resonance, while the WiFi antenna device of this application embodiment, through the aforementioned structure, successfully reduces the antenna size to approximately 0.15λ, while simultaneously achieving an ultra-low profile of only 1mm. This miniaturization design not only significantly reduces the antenna volume, but more importantly, its low profile characteristic virtually eliminates specific requirements for the installation location, thereby granting the antenna a high degree of layout freedom within the vehicle body and solving the problems of large space occupation and limited installation of traditional rod-type antennas.

[0084] refer to Figure 6A As can be seen, the WiFi antenna device in this application embodiment achieves a VSWR (Voltage Standing Wave Ratio) of less than 2 in the 2400-2485MHz, 5150-5850MHz, and 5925-7125MHz frequency bands. This means that the antenna is a high-performance tri-band antenna, successfully achieving good impedance matching in all mainstream Wi-Fi frequency bands (2.4G, 5G, 6G). This antenna is a well-designed and fully functional Wi-Fi antenna that can seamlessly support various Wi-Fi devices.

[0085] refer to Figure 6B As can be seen, the WiFi antenna device in this application embodiment achieves a total efficiency of more than 60% in the 2400-2485MHz, 5150-5850MHz and 5925-7125MHz frequency bands. In other words, the antenna can effectively convert most of the input energy into wireless signals instead of wasting it on heat generation, and performs well even in complex internal environments of devices.

[0086] refer to Figure 7 The WiFi antenna device of this application embodiment can be installed in different locations on the vehicle body, such as Location1-Location6 as shown in the figure. (See reference...) Figure 8A When installed at Location1, the WiFi antenna exhibits an omnidirectional coverage beam pattern within the 2400-2485MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 8B When installed at Location1, the WiFi antenna exhibits an omnidirectional coverage beam pattern within the 5150-5850MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 8C When the WiFi antenna device is installed in Location1, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band, with a good omnidirectional coverage ratio.

[0087] Similarly, refer to Figure 9A When installed at Location2, this WiFi antenna device exhibits an omnidirectional coverage Omni beamform within the 2400-2485MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 9B When installed in Location2, this WiFi antenna device exhibits an omnidirectional coverage beam pattern within the 5150-5850MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 9C When the WiFi antenna device is installed in Location2, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band, with a good omnidirectional coverage ratio.

[0088] refer to Figure 10A When installed in Location3, this WiFi antenna device exhibits omnidirectional coverage with an omni-beam pattern within the 2400-2485MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 10BWhen installed in Location3, this WiFi antenna device exhibits omnidirectional coverage with an omni-beamform within the 5150-5850MHz frequency band, demonstrating good omnidirectional coverage ratio. (Reference) Figure 10C When the WiFi antenna device is installed in Location3, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band, with a good omnidirectional coverage ratio.

[0089] refer to Figure 11A When installed in Location4, this WiFi antenna device exhibits an omnidirectional coverage Omni beamform within the 2400-2485MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 11B When installed in Location4, this WiFi antenna device exhibits omnidirectional coverage with an omni-beam pattern within the 5150-5850MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 11C When the WiFi antenna device is installed in Location4, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band, with a good omnidirectional coverage ratio.

[0090] refer to Figure 12A When installed in Location5, this WiFi antenna device exhibits omnidirectional coverage with an omni-beam pattern within the 2400-2485MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 12B When installed in Location5, this WiFi antenna device exhibits omnidirectional coverage with an omni-beam pattern within the 5150-5850MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 12C When the WiFi antenna device is installed in Location5, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band, with a good omnidirectional coverage ratio.

[0091] refer to Figure 13A When installed on Location6, this WiFi antenna device exhibits omnidirectional coverage with an omni-beam pattern within the 2400-2485MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 13B When installed on Location6, this WiFi antenna device exhibits omnidirectional coverage with an omni-beamform within the 5150-5850MHz frequency band, demonstrating a good omnidirectional coverage ratio. (Reference) Figure 13C When the WiFi antenna device is installed in Location6, it presents an omni-beam pattern with omnidirectional coverage in the 5925-7125MHz frequency band, with a good omnidirectional coverage ratio.

[0092] In other words, the WiFi antenna device can be installed in multiple locations on the vehicle body, and regardless of the location, the WiFi antenna behaves like an ideal "light bulb" in the 2400-2485MHz, 5150-5850MHz and 5925-7125MHz frequency bands, emitting light (signal) evenly in all directions, ensuring that there are no obvious signal dead zones around the device, and providing users with a stable and seamless wireless coverage experience.

[0093] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A WiFi antenna device, characterized in that, include: A PCB board, wherein one side of the PCB board is provided with a first grounding radiating branch and a plurality of main radiating branches, the plurality of main radiating branches including: The first radiating branch has a low-frequency operating band of 2.4GHz-2.485GHz and is connected to the first grounding radiating branch. The second radiating branch has a medium-frequency operating band and a high-frequency operating band, wherein the medium-frequency operating band is 5.15GHz-5.85GHz and the high-frequency operating band is 5.925GHz-7.125GHz, and is connected to the first grounding radiating branch.

2. The WiFi antenna device according to claim 1, characterized in that, It also includes matching branches, which include a first arm and a second arm, wherein, The first arm extends along the width direction of the PCB board, one end of the first arm is connected to the first grounding radiation branch, and the other end is connected to the second arm; The second arm is perpendicular to the first arm, and the second arm and the first grounding radiation branch are spaced apart along the width direction of the PCB board to form a first coupling gap.

3. The WiFi antenna device according to claim 2, characterized in that, The width of the first coupling gap is 1.51 mm and the length is 13 mm. The width of the first support arm is 6 mm and the width of the second support arm is 3 mm.

4. The WiFi antenna device according to claim 2, characterized in that, The main radiating branch includes a third arm and a fourth arm, wherein, The third arm extends along the width direction of the PCB board and is perpendicular to and connected to the second arm and the fourth arm respectively to form a second coupling gap; The fourth arm extends along the length of the PCB board, and the length of the fourth arm extending along the length of the PCB board is greater than the length of the second arm extending along the length of the PCB board. The third arm and the fourth arm together form the first radial branch.

5. The WiFi antenna device according to claim 4, characterized in that, The main radiating branch also includes a fifth arm, which extends along the length of the PCB board. One end of the fifth arm is flush with one end of the fourth arm and connected to the fourth arm. The length of the fifth arm extending along the length of the PCB board is less than the length of the fourth arm extending along the length of the PCB board, so as to form a gap. The third arm and the fifth arm together form the second radiating branch.

6. The WiFi antenna device according to claim 4, characterized in that, The fourth arm is 22mm long and 6.5mm wide, the second coupling gap is 1.5mm wide, and the third arm is 5.5mm wide.

7. The WiFi antenna device according to claim 5, characterized in that, The notch is 7mm long and 2.65mm wide.

8. The WiFi antenna device according to claim 2, characterized in that, On the other side of the PCB board, a second grounding radiation branch is provided, which is opposite to the first grounding radiation branch. The second grounding radiation branch has a clearance area with a length of 9.03 mm and a width of 1.78 mm. The length of the second grounding radiation branch on the left side of the clearance area is 12.54 mm, the length of the second grounding radiation branch on the right side of the clearance area is 8.43 mm, and the width of the second grounding radiation branch is 7.39 mm.

9. The WiFi antenna device according to claim 8, characterized in that, The clearance area is provided with an L-shaped antenna feed point, which includes a first segment and a second segment. The first segment is perpendicular to the second segment. The length of the first segment is 6.4 mm and the width is 1.3 mm. The length of the clearance area on the left side of the first segment is 2.06 mm, and the length of the clearance area on the right side of the first segment is 0.57 mm. The distance between the bottom wall of the first segment and the bottom wall of the clearance area is 0.48 mm. The second segment is connected to the right side of the first segment. The length of the second segment is 1.86 mm and the width is 0.5 mm.

10. The WiFi antenna device according to claim 1, characterized in that, It also includes an upper cover and a lower cover, the upper cover and the lower cover being connected to form an installation space, and the PCB board being disposed in the installation space.

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