Ultra-wideband antenna array and electronic device

Abstract

The application discloses an ultraband antenna array and an electronic device, and belongs to the technical field of electronic products. The antenna array comprises a first antenna unit, a second antenna unit and a third antenna unit, and a first distance and a second distance are smaller than a third distance; wherein the first distance is the distance between the first antenna unit and the third antenna unit, the second distance is the distance between the second antenna unit and the third antenna unit, and the third distance is the distance between the first antenna unit and the second antenna unit; wherein the phase centers of the first antenna unit, the second antenna unit and the third antenna unit deviate from the geometric centers.

Description

Technical Field

[0001] This application belongs to the field of electronic product technology, specifically relating to an ultra-wideband antenna array and electronic device. Background Technology

[0002] With the development of 5G communication technology, the era of the Internet of Things is approaching, and users are placing increasingly higher demands on the functionality of electronic devices, requiring greater convenience and intelligence. One important application is indoor positioning and object finding, which utilizes Ultra Wide Band (UWB) technology. Achieving a good user experience with UWB places high demands on antenna performance, including high bandwidth, stable phase characteristics, spatially stable group delay, and a good fidelity factor. To obtain these superior characteristics, not only is specific antenna design necessary, but also a reasonable antenna layout and the characteristics of the antenna's materials and manufacturing processes must be considered.

[0003] To achieve good angle measurement accuracy and long ranging distance, high requirements are placed on antenna performance and spatial configuration. Existing UWB antenna solutions often employ half-wavelength patch antennas in their design, such as... Figure 1 As shown, its phase center is generally not much different from the geometric center. Figure 1 In this diagram, m1 is the phase center and m2 is the feed point. Furthermore, to achieve better angle measurement accuracy, the antenna spacing is generally required to be close to half a wavelength, meaning the phase center spacing is close to half a wavelength.

[0004] The aforementioned solutions require relatively large antenna sizes and spacing, resulting in a large overall space occupied by the UWB antenna. Furthermore, the increased number and space occupied by camera modules within the terminal, as well as the increased number and space occupied by cellular or non-cellular antennas, leave less space for UWB antennas. Therefore, existing UWB antenna solutions often cannot be installed within the terminal due to their large space requirements. Summary of the Invention

[0005] The purpose of this application is to provide an ultra-wideband antenna array and electronic device that can solve the problem of large space occupation in existing UWB antenna solutions.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In a first aspect, embodiments of this application provide an ultra-wideband antenna array, including: a first antenna element, a second antenna element, and a third antenna element, wherein a first distance and a second distance are less than a third distance; wherein the first distance is the distance between the first antenna element and the third antenna element, the second distance is the distance between the second antenna element and the third antenna element, and the third distance is the distance between the first antenna element and the second antenna element; wherein the phase centers of the first antenna element, the second antenna element, and the third antenna element are offset from their geometric centers.

[0008] In a second aspect, embodiments of this application provide an electronic device, including: an ultra-wideband antenna array as described in the first aspect.

[0009] In this embodiment, the ultra-wideband antenna array includes a first antenna element, a second antenna element, and a third antenna element, with the third antenna element adjacent to both the first and second antenna elements. The phase centers of the first, second, and third antenna elements are offset from their geometric centers. This allows for reasonable adjustment of the positions of the first, second, and third antenna elements according to the internal environment of the electronic device, ensuring that the phase center distance between two antenna elements is less than the geometric center distance, resulting in a more compact arrangement of the two antenna elements and reducing the space occupied by the ultra-wideband antenna array. This solves the problem of large space requirements in existing UWB antenna solutions while ensuring good antenna performance and angle measurement accuracy of the ultra-wideband antenna array. Attached Figure Description

[0010] Figure 1 A schematic diagram showing a half-wavelength patch antenna;

[0011] Figure 2 This diagram illustrates the angle measurement process.

[0012] Figure 3 One of the schematic diagrams showing the structure of an ultra-wideband antenna array according to an embodiment of the present invention;

[0013] Figure 4 A second schematic diagram illustrating the structure of an ultra-wideband antenna array according to an embodiment of the present invention;

[0014] Figure 5 The third schematic diagram illustrating the structure of the ultra-wideband antenna array according to an embodiment of the present invention;

[0015] Figure 6 Fourth schematic diagram illustrating the structure of the ultra-wideband antenna array according to an embodiment of the present invention;

[0016] Figure 7 Fifth schematic diagram illustrating the structure of an ultra-wideband antenna array according to an embodiment of the present invention;

[0017] Figure 8 Sixth schematic diagram illustrating the structure of an ultra-wideband antenna array according to an embodiment of the present invention;

[0018] Figure 9 A schematic diagram illustrating a planar inverted-F antenna according to an embodiment of the present invention;

[0019] Figure 10 One of the schematic diagrams of the structure of the electronic device according to an embodiment of the present invention;

[0020] Figure 11 A second schematic diagram illustrating the structure of an electronic device according to an embodiment of the present invention;

[0021] Figure 12 The third schematic diagram illustrating the structure of the electronic device according to an embodiment of the present invention;

[0022] Figure 13 A schematic diagram illustrating a motherboard bracket according to an embodiment of the present invention;

[0023] Figure 14 Fourth schematic diagram illustrating the structure of an electronic device according to an embodiment of the present invention;

[0024] Figure 15 Fifth schematic diagram illustrating the structure of an electronic device according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10-Electronic device; 11-Display; 12-Rear shell; 13-Middle shell; 14-Camera module; 15-Breakpoint; 16-Motherboard bracket; 17-Ultra-wideband antenna array; 17a1-First antenna element; 17a2-Second antenna element; 17a3-Third antenna element; 17b1-First feed contact; 17b2-Second feed contact; 17b3-Third feed contact; 17c1-First grounding hole; 17c2-Second grounding hole; 17c3-Third grounding hole; 17d-Metallic ground; 17e1-First feed signal line; 17e2-Second feed signal line; 17e3 - Third power supply signal line; 17f - Contact point; 17g1 - First phase center; 17g2 - Second phase center; 17g3 - Third phase center; 17h1 - First opening slot; 17h2 - Second opening slot; 17h3 - Third opening slot; 17i1 - First area; 17i2 - Second area; 17i3 - Third area; 17f - Contact point; 18 - Main board; 19 - Shielding cover; 20 - Board-to-Board Connectors (BTB); L1 - First structural layer; L2 - Second structural layer; L3 - Third structural layer. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The following is in conjunction with the appendix Figure 2 The section introduces the aspect ratio of the phase center spacing of the antenna elements, which is close to half a wavelength.

[0030] When using a UWB antenna in a mobile phone to implement angle and distance measurement functions, the angle measurement function is based on the Angle of Arrival (AOA) principle. AOA is calculated using the Phase Difference of Arrival (PDOA). Theoretically, the phase difference of PDOA is calculated using the following formula:

[0031] ;

[0032] in, λ is the phase difference, d is the electrical spacing between the antennas (i.e., the phase center spacing), λ is the operating wavelength, and θ is the angle of arrival.

[0033] Specifically, The specific derivation process is as follows:

[0034] First, when the distance D between the object being measured and the terminal is greater than several wavelengths, D >> d, it can be considered that... Secondly, after the incoming wavefront reaches the first antenna, it requires an additional distance to reach the second antenna. Therefore, distance Therefore, we can deduce that the phase difference... .

[0035] Furthermore, it can be concluded that .

[0036] To avoid affecting the AOA results, Must be smaller than Therefore, d needs to be set to , in, It is the wavelength corresponding to the operating frequency.

[0037] As shown above, a UWB antenna calculates the angle of arrival by using the phase difference of the arriving signals from two antenna elements spaced by a distance d. According to the above angle measurement principle, a suitable electrical spacing (i.e., the phase center spacing) is required to obtain better angle measurement accuracy.

[0038] The ultra-wideband antenna array provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0039] Please refer to Figures 3 to 9 This invention provides an ultra-wideband antenna array, comprising: a first antenna element 17a1, a second antenna element 17a2, and a third antenna element 17a3, wherein a first distance and a second distance are less than a third distance; wherein the first distance is the distance between the first antenna element 17a1 and the third antenna element 17a3, the second distance is the distance between the second antenna element 17a2 and the third antenna element 17a3, and the third distance is the distance between the first antenna element 17a1 and the second antenna element 17a2; wherein the phase centers of the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 are offset from the geometric center.

[0040] Optionally, the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 are arranged in an L-shape, and the third antenna element 17a3 is adjacent to the first antenna element 17a1 and the second antenna element 17a2, respectively.

[0041] In this embodiment, the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 form the radiating structure of an ultra-wideband antenna array. The first antenna element 17a1 and the third antenna element 17a3 are distributed along a first direction for vertical positioning; the second antenna element 17a2 and the third antenna element 17a3 are distributed along a second direction for horizontal positioning. The first and second directions are perpendicular to each other, resulting in an approximate L-shaped distribution of the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3. Specifically, the phase center of each antenna element in the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 is offset to one side from the geometric center of the antenna. This allows for a more compact arrangement of the three antennas, making the phase center distance between two antenna elements smaller than the geometric center distance, thus reducing the space occupied by the ultra-wideband antenna array. Furthermore, by ensuring the phase center distance between two antenna elements, the PDOA characteristics between the longitudinal antennas are improved, resulting in better angular measurement accuracy.

[0042] In one embodiment, the first antenna unit 17a1 has a first opening slot 17h1, the second antenna unit 17a2 has a second opening slot 17h2, and the third antenna unit 17a3 has a third opening slot 17h3. The first phase center 17g1 of the first antenna unit 17a1 is located at the bottom of the first opening slot 17h1, the second phase center 17g2 of the second antenna unit 17a2 is located at the bottom of the second opening slot 17h2, and the third phase center 17g3 of the third antenna unit 17a3 is located at the bottom of the third opening slot 17h3.

[0043] In this embodiment, the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are used to radiate electromagnetic waves to the outside.

[0044] For example, such as Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the first opening slot 17h1, the second opening slot 17h2 and the third opening slot 17h3 are horizontally placed in a "U" shape, and the phase center of each antenna element is close to the bottom end of the "U" shape of the "U"-shaped opening slot, away from the closed end of the antenna element.

[0045] It should be noted that the orientation of the antenna opening is related to the polarization direction of the antenna element. In the example above, the polarization direction of the antenna element is set to horizontal, so the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are arranged in a horizontal "U" shape. However, depending on the application, it is not limited to the horizontal orientation. For example, when the polarization direction of the antenna element is vertical, the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are arranged in a vertical "U" shape.

[0046] In one embodiment, the phase center spacing between at least two of the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 is greater than the geometric center spacing.

[0047] That is, the phase center distance between adjacent first antenna element 17a1 and third antenna element 17a3 is greater than the geometric center distance, and / or, the phase center distance between adjacent second antenna element 17a2 and third antenna element 17a3 is greater than the geometric center distance.

[0048] In one embodiment, the second opening groove 17h2 and the third opening groove 17h3 have opposite opening orientations. The opening orientation of the first opening groove 17h1 is not limited.

[0049] In a preferred example, such as Figure 4 As shown, the first opening slot 17h1 and the third opening slot 17h3 have the same opening orientation, and the second opening slot 17h2 and the third opening slot 17h3 have opposite opening orientations. Thus, the phase center distance between the second antenna unit 17a2 and the third antenna unit 17a3 is C, and the geometric center distance is B. The phase center distance is larger than the geometric center distance.

[0050] In one embodiment, the opening orientation of the first opening groove 17h1 is opposite to that of the third opening groove 17h3. The opening orientation of the second opening groove 17h2 is not limited.

[0051] In a preferred example, such as Figure 7 As shown, the opening orientations of the first opening slot 17h1 and the third opening slot 17h3 are opposite, and the opening orientations of the second opening slot 17h2 and the third opening slot 17h3 are also opposite. Thus, the phase center distance between the first antenna element 17a1 and the third antenna element 17a3 is larger than the geometric center distance, while the phase centers of the second antenna element 17a2 and the third antenna element 17a3 are misaligned, thereby achieving a phase center distance between the second antenna element 17a2 and the third antenna element 17a3 that is larger than the geometric center distance.

[0052] It should be pointed out that, Figure 4 and Figure 7The examples listed above illustrate combinations of the opening orientations of antenna elements in a UWB antenna array. However, the combinations are not limited to the examples above. There are multiple combinations that maximize the distance between the phase centers of at least two antenna elements, while the opening orientation of the other antenna element is not restricted.

[0053] In the above embodiments, since the phase center spacing is larger than the geometric center spacing, while ensuring that the phase center spacing between antenna elements is close to half a wavelength, the geometric center spacing between two antennas can be reduced. In this way, the physical size of the antenna can be greatly reduced, while still obtaining better PDOA characteristics, that is, better angle measurement performance can be obtained.

[0054] In one embodiment, the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 are all planar inverted F-shaped antennas (PIFA) radiating in quarter-wave mode.

[0055] The phase center of the PIFA antenna is on one side of the antenna's slot, such as... Figure 9 As shown, m3 is the feed point of the PIFA antenna, m2 is the feed point of the PIFA antenna, and m1 is the phase center of the PIFA antenna. The phase center of the PIFA antenna is offset to one side from the geometric center of the antenna, and the size of the PIFA antenna is approximately equal to one-quarter wavelength (λ / 4). Thus, the size of each antenna element is reduced by half compared to the half-wave patch antenna.

[0056] In this embodiment, by using a PIFA antenna as the antenna element of an ultra-wideband antenna array, a larger phase center spacing can be obtained with a smaller physical size while reducing the area of ​​the ultra-wideband antenna array. This ensures that the ultra-wideband antenna array has both good antenna performance and good angle measurement accuracy.

[0057] Based on the previous embodiment, such as Figure 8 As shown, the openings of the first opening groove 17h1, the second opening groove 17h2, and the third opening groove 17h3 have the same orientation.

[0058] In this embodiment, the opening orientations of the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are set to be the same. Thus, when the ultra-wideband antenna array is placed inside the terminal, the opening orientations of the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 can be opposite to the side where the camera module is located. This makes the first phase center 17g1 corresponding to the first antenna unit 17a1, the second phase center 17g2 corresponding to the second antenna unit 17a2, and the third phase center 17g3 corresponding to the third antenna unit 17a3 far away from the camera module, thereby reducing the influence of the camera module on the antenna units.

[0059] It should be noted that the above embodiments illustrate the optimal relationship between the phase centers of the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 and components that significantly affect antenna performance, such as the camera module. It is understood that the phase centers of two of the three antenna units can be moved away from the camera module, and the orientation of the slot of the third antenna unit can be any rotation angle, such as up, down, left, or right.

[0060] In one embodiment, the ultra-wideband antenna array includes a first structural layer L1, a second structural layer L2, and a third structural layer L3 stacked sequentially.

[0061] The first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 are disposed in the first structural layer L1; the feed signal lines of the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 are disposed in the second structural layer L2, and the orthogonal projection positions of the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit on the second structural layer L2 are set to be clear; the third structural layer L3 is provided with a reference metal ground.

[0062] In this embodiment, the ultra-wideband antenna array is made of a flexible circuit board, which can utilize materials such as liquid crystal polymer (LCP), modified polyimide (MPI), and polyimide (PI) through processes such as copper plating to form the antenna circuitry. Specifically, the flexible circuit board is configured with three layers of traces: a first structural layer L1, a second structural layer L2, and a third structural layer L3. The first structural layer L1 is used to set the antenna's radiating structure, the second structural layer L2 is used to set the antenna's feed signal lines, and the third structural layer L3 is used to set a complete reference metal ground 17d.

[0063] For example, such as Figure 3 As shown, it depicts a complete flexible circuit board, such as Figures 4 to 6 As shown, the first structural layer L1, the second structural layer L2, and the third structural layer L3 are stacked sequentially from top to bottom.

[0064] like Figure 3 and 4 In the first structural layer L1, a radiating structure is provided, including: a first antenna unit 17a1, a second antenna unit 17a2, and a third antenna unit 17a3. The first antenna unit 17a1 is provided with a first feed contact point 17b1, the second antenna unit 17a2 is provided with a second feed contact point 17b2, and the third antenna unit 17a3 is provided with a third feed contact point 17b3.

[0065] Specifically, the closed end of the first antenna element 17a1 is provided with multiple first grounding holes 17c1, the closed end of the second antenna element 17a2 is provided with multiple second grounding holes 17c2, and the closed end of the third antenna element 17a3 is provided with multiple third grounding holes 17c3. In this way, each antenna element is equivalent to a PIFA antenna, and the antenna size A is approximately equal to one-quarter wavelength of the antenna operating frequency, which is about half the size of a half-wavelength patch antenna.

[0066] like Figure 5 In the second structural layer L2, there are first feed signal lines 17e1 of the first antenna unit 17a1, second feed signal lines 17e2 of the second antenna unit 17a2, and third feed signal lines 17e3 of the third antenna unit 17a3; and a metal ground 17d is provided in the peripheral area of ​​each feed signal line; the orthographic projection area of ​​each antenna unit in the second structural layer L2 (e.g., Figure 5 Clearance is set in the first region 17i1, the second region 17i2, and the third region 17i3, and the corresponding metal layer is stripped.

[0067] like Figure 6 As shown, the third structural layer L3 is provided with a complete reference metal ground 17d, which is used to constrain the impedance of the feed signal line and also serves as the ground of the antenna element. The third structural layer L3 is also provided with a contact point 17f that is connected to the motherboard BTB connector 20.

[0068] It should also be noted that the first feed signal line 17e1 is connected to the first feed contact point 17b1, the second feed signal line 17e2 is connected to the second feed contact point 17b2, and the third feed signal line 17e3 is connected to the third feed contact point 17b3. All connections are made by drilling and plating copper between adjacent layers. The metal ground layers of the first structural layer L1, the second structural layer L2, and the third structural layer L3 are connected by copper plating through multiple vias.

[0069] In one embodiment, a metal ground is provided between two adjacent antenna elements in the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3.

[0070] In this embodiment, a metal ground 17d is provided between two adjacent antenna elements, which can improve the isolation between the two adjacent antenna elements.

[0071] Please refer to Figures 10 to 15 The present invention also provides an electronic device 10, including: an ultra-wideband antenna array 17 as described above.

[0072] Electronic devices include, but are not limited to, mobile phones, tablets, laptops, PDAs, in-vehicle terminals, wearable devices, and pedometers.

[0073] Electronic devices may be equipped with wireless communication circuits that can support wireless communication in multiple wireless communication frequency bands. The communication frequency bands (sometimes referred to as bands herein) processed by the wireless communication circuits may include satellite navigation system communication bands, cellular telephone communication bands, wireless local area network communication bands, near-field communication bands, ultra-wideband communication bands, or other wireless communication bands.

[0074] For example, such as Figures 10 to 12 As shown, the electronic device 10 may have a display, and the display 11 may be mounted on the front of the electronic device 10 as shown. Figure 10 As shown. The display 11 may be a combination of capacitive touch electrodes or a touchscreen that is not sensitive to touch. The electronic device 10 may include a housing, such as Figures 10 to 11 The back cover 12 and the middle cover 13 are disposed between the back cover 12 and the display 11. The middle cover 13 may be made of metal and has multiple breakpoints 15.

[0075] In one embodiment, the electronic device 10 further includes: a camera module;

[0076] When the openings of the first opening slot 17h1 of the first antenna unit 17a1, the second opening slot 17h2 of the second antenna unit 17a2, and the third opening slot 17h3 of the third antenna unit 17a3 of the ultra-wideband antenna array have the same orientation, the opening orientation is opposite to the side where the camera module is located.

[0077] For example, such as Figures 11 to 15 As shown, multiple camera modules 14 are arranged directly below the rear cover 12. The openings of the antenna units of the ultra-wideband antenna array 17 face away from the camera modules, that is, the phase center is kept away from the camera modules to avoid the influence of the camera modules on the antenna performance.

[0078] In one embodiment, the electronic device 10 further includes: a housing and a motherboard disposed within the housing;

[0079] The motherboard is equipped with an antenna chip, and the ultra-wideband antenna array is electrically connected to the antenna chip.

[0080] like Figure 12 As shown, when hidden Figure 11Behind the rear cover 12, a motherboard bracket 16 is located directly below the rear cover 12. The aforementioned ultra-wideband antenna array 17 is mounted on the motherboard bracket 16. The motherboard bracket 16 may be made of metal and has an opening 160 in its middle area to facilitate the UWB antenna to pass through the opening 160 and make an electrical connection with the motherboard 18. Multiple screw holes 161, 162, 163, and 164 are provided in the surrounding area of ​​the ultra-wideband antenna array 17. Screws are used to fix the motherboard bracket 16 to the motherboard and make it conductive and grounded, which facilitates the installation of the UWB antenna array.

[0081] like Figure 14 and 15 As shown, after hiding the motherboard bracket 16, a motherboard 18 can be seen directly above the middle shell 13 (that is, below the motherboard bracket 16). A shielding cover 19 is provided on the motherboard 18, and a BTB connector 20 is provided on one side of the shielding cover 19. A UWB chip is provided inside the motherboard, and the BTB connector 20 is used to connect the UWB chip on the motherboard to each antenna unit in the UWB antenna array 17.

[0082] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0083] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0084] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An ultra-wideband antenna array, characterized in that, include: A first antenna element, a second antenna element, and a third antenna element, wherein a first distance and a second distance are less than a third distance; wherein the first distance is the distance between the first antenna element and the third antenna element, the second distance is the distance between the second antenna element and the third antenna element, and the third distance is the distance between the first antenna element and the second antenna element; The phase centers of the first antenna element, the second antenna element, and the third antenna element are offset from the geometric center. The first antenna unit has a first opening slot, the second antenna unit has a second opening slot, and the third antenna unit has a third opening slot. The first opening slot, the second opening slot, and the third opening slot are U-shaped slots. The first phase center of the first antenna unit is located at one end of the bottom of the first opening slot, the second phase center of the second antenna unit is located at one end of the bottom of the second opening slot, and the third phase center of the third antenna unit is located at one end of the bottom of the third opening slot. The first antenna unit, the second antenna unit, and the third antenna unit are all planar inverted-F antennas radiating in quarter-wave mode, and the feed point of the planar inverted-F antenna is located on the U-shaped opening side of the U-shaped slot. In this case, the phase center spacing between two adjacent antenna elements is greater than the geometric center spacing.

2. The ultra-wideband antenna array according to claim 1, characterized in that, The second opening slot faces the opposite direction to the opening of the third opening slot.

3. The ultra-wideband antenna array according to claim 1, characterized in that, The openings of the first opening slot and the third opening slot face opposite directions.

4. The ultra-wideband antenna array according to claim 1, characterized in that, The openings of the first slot of the first antenna unit, the second slot of the second antenna unit, and the third slot of the third antenna unit have the same orientation.

5. The ultra-wideband antenna array according to claim 1, characterized in that, The ultra-wideband antenna array includes a first structural layer, a second structural layer, and a third structural layer stacked sequentially. The first antenna unit, the second antenna unit, and the third antenna unit are disposed in the first structural layer; The feed signal lines of the first antenna unit, the second antenna unit, and the third antenna unit are disposed on the second structural layer, and the orthogonal projection positions of the first antenna unit, the second antenna unit, and the third antenna unit on the second structural layer are set to be empty; The third structural layer is provided with a reference metal ground.

6. The ultra-wideband antenna array according to claim 1, characterized in that, A metal ground is provided between two adjacent antenna elements in the first antenna element, the second antenna element, and the third antenna element.

7. An electronic device, characterized in that, include: The ultra-wideband antenna array as described in any one of claims 1 to 6.

8. The electronic device according to claim 7, characterized in that, Also includes: Camera module; When the openings of the first slot of the first antenna unit, the second slot of the second antenna unit, and the third slot of the third antenna unit of the ultra-wideband antenna array have the same orientation, the orientation of the openings is opposite to the side where the camera module is located.

9. The electronic device according to claim 7, characterized in that, It also includes: a housing and a motherboard disposed within the housing; The motherboard is equipped with an antenna chip, and the ultra-wideband antenna array is electrically connected to the antenna chip.

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