Ultra-wideband antenna array and electronic device

Abstract

The present application discloses an ultra-wideband antenna array and an electronic device, belonging to the technical field of electronic products. The ultra-wideband antenna array includes: a first antenna unit, a second antenna unit, a third antenna unit, and a fourth antenna unit; the fourth antenna unit is disposed between the first antenna unit and the third antenna unit; or the fourth antenna unit is disposed between the second antenna unit and the third antenna unit; a first distance between the first antenna unit and the third antenna unit, and a second distance between the second antenna unit and the third antenna unit are both smaller than a third distance between the first antenna unit and the second antenna unit; the first antenna unit, the second antenna unit, and the third antenna unit support a first operating frequency band, and the fourth antenna unit supports a second operating frequency band; and the first operating frequency band is different from the second operating frequency band; the phase centers of the first antenna unit, the second antenna unit, and the third antenna unit deviate from the geometric center.

Description

Technical Field

[0001] This application belongs to the technical field of electronic products, and particularly relates to an ultra-wideband antenna array and an electronic device. Background Art

[0002] With the development of 5G communication technology, the era of the Internet of Everything is coming soon. Users have more and more requirements for the functions of electronic devices, and higher requirements are put forward for convenience and intelligence. One important application is to introduce indoor positioning, item finding, etc. into electronic devices. To achieve this function, ultra-wideband (UWB) technology is used. If this technology needs to obtain a good experience effect, it poses higher requirements for the performance of the antenna. These requirements include high bandwidth of the antenna, stable phase characteristics, stable group delay in the spatial angle, good response characteristic fidelity factor, etc. To obtain the above better characteristics, not only a specific antenna needs to be designed, but also a reasonable layout needs to be set, and the characteristics of the antenna material process also need to be considered together.

[0003] Based on the application scenarios and ecological layout of UWB, some alliance organizations have put forward some requirements for the performance and parameters of UWB. For example, it is mandatory to support Channel 9, and this Channel 9 needs to have ranging and angle measurement capabilities; or, it is required that UWB devices support Channel 5 and Channel 9, and this Channel 5 only needs to support ranging capabilities.

[0004] Currently, the schematic diagram of the commonly used UWB radio frequency architecture is as Figure 1 shown, which includes four UWB antennas. Among them, the positioning antenna includes three antennas ( Figure 1 Ant.V, Ant.H, and Ant.Com in Figure 1 ), which have positioning and ranging functions, th and the 4 th antenna in

[0005] has ranging function. Among them, Ant.Com in the positioning antenna and the 4 Figure 2where m1 is the phase center and m2 is the feeding point. In order to obtain better angle measurement accuracy, the spacing between the antennas generally needs to be close to half a wavelength, that is, the spacing between the phase centers is close to half a wavelength, which makes the size of the antenna larger and the antenna spacing also larger. On the other hand, multiple antennas of the UWB antenna are all set to support two frequency bands, namely Channel 5 and Channel 9, which makes the antenna space occupied by the entire antenna system larger. However, due to the increase in the number and occupied space of the camera modules in the terminal, as well as the increase in the number and occupied space of the cellular antennas or non-cellular antennas, the antenna space left for the UWB is smaller. Therefore, the existing UWB antenna solutions often cannot be set in the terminal due to the large occupied space. Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide an ultra-wideband antenna array and an electronic device, which can solve the problem that the existing ultra-wideband antenna array occupies a large space.

[0007] In order to solve the above technical problems, the present application is implemented as follows:

[0008] In a first aspect, an embodiment of the present application provides an ultra-wideband antenna array, including: a first antenna unit, a second antenna unit, a third antenna unit, and a fourth antenna unit; wherein, the fourth antenna unit is disposed between the first antenna unit and the third antenna unit; or, the fourth antenna unit is disposed between the second antenna unit and the third antenna unit; and a first distance and a second distance are less 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; the first antenna unit, the second antenna unit, and the third antenna unit support a first operating frequency band, and the fourth antenna unit supports a second operating frequency band; and the first operating frequency band is different from the second operating frequency band; the phase centers of the first antenna unit, the second antenna unit, and the third antenna unit deviate from the geometric center.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, including: the ultra-wideband antenna array as described in the first aspect.

[0010] In an embodiment of the present application, the ultra-wideband antenna array includes: a first antenna unit, a second antenna unit, a third antenna unit, and a fourth antenna unit; and a first distance between the first antenna unit and the third antenna unit, and a second distance between the second antenna unit and the third antenna unit are both smaller than a third distance between the first antenna unit and the second antenna unit. Further, the fourth antenna unit is disposed between the adjacent first antenna unit and the third antenna unit; or the fourth antenna unit is disposed between the adjacent second antenna unit and the third antenna unit; the first antenna unit, the second antenna unit, and the third antenna unit support a first operating frequency band, and the fourth antenna unit supports a second operating frequency band; and the first operating frequency band is different from the second operating frequency band; since the phase centers of the first antenna unit, the second antenna unit, and the third antenna unit deviate from the geometric center, therefore, according to the internal environment of the electronic device, the setting positions of the first antenna unit, the second antenna unit, and the third antenna unit can be reasonably adjusted, so that the phase center spacing between two antenna units is smaller than the geometric center spacing, making the arrangement of the two antenna units closer, thereby achieving the reduction of the occupied space of the ultra-wideband antenna array while ensuring good antenna performance of the ultra-wideband antenna array. And by disposing the fourth antenna unit between the adjacent first antenna unit and the third antenna unit; or disposing the fourth antenna unit between the adjacent second antenna unit and the third antenna unit, it is possible to achieve the reduction of the occupied space of the ultra-wideband antenna array while enabling the ultra-wideband antenna array to have ranging capabilities and good angle measurement accuracy. Description of the Drawings

[0011] Figure 1 Indicates a schematic diagram of angle measurement;

[0012] Figure 2 Indicates a schematic diagram of a half-wavelength patch antenna;

[0013] Figure 3 Indicates a schematic diagram of a UWB radio frequency architecture;

[0014] Figure 4 Indicates a first schematic diagram of the structure of the ultra-wideband antenna array according to an embodiment of the present invention;

[0015] Figure 5 Indicates a second schematic diagram of the structure of the ultra-wideband antenna array according to an embodiment of the present invention;

[0016] Figure 6 Indicates a third schematic diagram of the structure of the ultra-wideband antenna array according to an embodiment of the present invention;

[0017] Figure 7 Indicates a fourth schematic diagram of the structure of the ultra-wideband antenna array according to an embodiment of the present invention;

[0018] Figure 8Schematic diagram V of the ultra-wideband antenna array according to an embodiment of the present invention;

[0019] Figure 9 Schematic diagram VI of the ultra-wideband antenna array according to an embodiment of the present invention;

[0020] Figure 10 Schematic diagram of the planar inverted-F antenna according to an embodiment of the present invention;

[0021] Figure 11 Schematic diagram I of the electronic device according to an embodiment of the present invention;

[0022] Figure 12 Schematic diagram II of the electronic device according to an embodiment of the present invention;

[0023] Figure 13 Schematic diagram III of the electronic device according to an embodiment of the present invention;

[0024] Figure 14 Schematic diagram of the main board bracket according to an embodiment of the present invention;

[0025] Figure 15 Schematic diagram IV of the electronic device according to an embodiment of the present invention;

[0026] Figure 16 Schematic diagram V of the electronic device according to an embodiment of the present invention.

[0027] Explanation of reference numerals:

[0028] 10 - Electronic device; 11 - Display; 12 - Rear case; 13 - Middle case; 14 - Camera module; 15 - Break point; 16 - Main board bracket; 160 - Opening; 161 to 164 - Screw holes; 17 - Ultra - wideband antenna array; 17a1 - First antenna unit; 17a2 - Second antenna unit; 17a3 - Third antenna unit; 17a4 - Fourth antenna unit; 17b1 - First feeding contact point; 17b2 - Second feeding contact point; 17b3 - Third feeding contact point; 17b4 - Fourth feeding contact point; 17c1 - First grounding hole; 17c2 - Second grounding hole; 17c3 - Third grounding hole; 17d - Metal ground; 17e1 - First feeding signal line; 17e2 - Second feeding signal line; 17e3 - Third feeding 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 region; 17i2 - Second region; 17i3 - Third region; 17i4 - Fourth region; 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 manners

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0031] Next, in combination with the attached Figure 3 , when applying the UWB antenna to implement the angle - measurement and distance - measurement functions, the phase - center spacing of the antenna units being close to half - wavelength will be described.

[0032] The angle measurement function is based on the Angle of Arrival (AOA) principle, and AOA is calculated through the Phase Difference Of Arrival (PDOA). Theoretically, the phase difference of PDOA is calculated by the following formula:

[0033]

[0034] Where, is the phase difference, d is the electrical spacing of the antenna (i.e., the phase center spacing), λ is the operating wavelength, and θ is the angle of the incoming wave.

[0035] Specifically, The specific derivation process of is as follows:

[0036] First, when the distance D between the object under test and the terminal is greater than several wavelengths, D >> d, it can be considered that θ1 = θ2 = θ; second, after the wavefront of the incoming wave reaches the first antenna, an additional distance d1 = dcosθ is required to reach the second antenna; therefore, the distance From this, it is deduced that: the phase difference

[0037] Furthermore, it is obtained that To avoid affecting the result of AOA, must be less than 180°, so d needs to be set to Where, λ is the wavelength corresponding to the operating frequency.

[0038] As can be seen from the above, the UWB antenna calculates the angle θ of the incoming wave through the phase difference of the signals arriving at the two antenna elements with a spacing of d. According to the above angle measurement principle, a suitable electrical spacing (i.e., the phase center spacing) can obtain better angle measurement accuracy.

[0039] Next, in combination with the accompanying drawings, the ultra-wideband antenna array provided by the embodiments of the present application will be described in detail through specific embodiments and their application scenarios.

[0040] Please refer to Figures 4 to 10, an embodiment of the present invention provides an ultra-wideband antenna array, including: a first antenna unit 17a1, a second antenna unit 17a2, a third antenna unit 17a3, and a fourth antenna unit 17a4; the fourth antenna unit 17a4 is disposed between the adjacent first antenna unit 17a1 and the third antenna unit 17a3; or, the fourth antenna unit 17a4 is disposed between the adjacent second antenna unit 17a2 and the third antenna unit 17a3; and a first distance and a second distance are less than a third distance; wherein, the first distance is the distance between the first antenna unit 17a1 and the third antenna unit 17a3, the second distance is the distance between the second antenna unit 17a2 and the third antenna unit 17a3, and the third distance is the distance between the first antenna unit 17a1 and the second antenna unit 17a2; the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 support a first operating frequency band, and the fourth antenna unit 17a4 supports a second operating frequency band; and the first operating frequency band is different from the second operating frequency band; the phase centers of the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 deviate from the geometric center.

[0041] Wherein, the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 are distributed in an L shape, and the third antenna unit 17a3 is adjacent to the first antenna unit 17a1 and the second antenna unit 17a2 respectively.

[0042] Optionally, the first operating frequency band is Channel9, which can be used for angle measurement and ranging, and the second operating frequency band is Channel5, which can be used for ranging.

[0043] In this embodiment, the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit 17a3, and the fourth antenna unit 17a4 are the radiation structures of the ultra-wideband antenna array. Among them, the first antenna unit 17a1 and the third antenna unit 17a3 are disposed along a first direction for vertical positioning; the second antenna unit 17a2 and the third antenna unit 17a3 are disposed along a second direction for horizontal positioning; the first direction and the second direction are perpendicular to each other, so that the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 are substantially distributed in an L shape. In particular, the phase center of each antenna unit in the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 deviates from one side of the antenna geometric center. In this way, by reasonably setting the three antennas, the phase center spacing between two antenna units can be made less than the geometric center spacing, making the arrangement of the two antenna units closer, thereby achieving the reduction of the occupied space of the ultra-wideband antenna array while ensuring good angle measurement accuracy of the ultra-wideband antenna array.

[0044] Meanwhile, the fourth antenna unit 17a4 for ranging is disposed between the adjacent first antenna unit 17a1 and the third antenna unit 17a3; alternatively, it is disposed between the adjacent second antenna unit 17a2 and the third antenna unit 17a3, that is, the fourth antenna unit supporting ranging is disposed within the gap between the three positioning antennas, which can make full use of the space of the three positioning antennas. Thus, while significantly reducing the area occupied by the antenna array, the UWB antenna can support both positioning and ranging functions at the same time, and the feeding signal lines of the entire ultra-wideband antenna array have a higher degree of freedom in routing. That is, by disposing the fourth antenna unit supporting ranging within the gap between the three positioning antennas, more antenna frequency bands can be taken into account without increasing the antenna volume and without changing the RF architecture, adapting to more application scenarios.

[0045] In an embodiment, the first antenna unit 17a1 has a first opening slot 17h1, the second antenna unit 17a2 has a second opening slot 17h2, the third antenna unit 17a3 has a third opening slot 17h3, and the first phase center 17g1 of the first antenna unit 17a1 is located at one end where the bottom of the first opening slot 17h1 is located, the second phase center 17g2 of the second antenna unit 17a2 is located at one end where the bottom of the second opening slot 17h2 is located, and the third phase center 17g3 of the third antenna unit 17a3 is located at one end where the bottom of the third opening slot 17h3 is located.

[0046] 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 externally.

[0047] Exemplarily, as Figure 4 、 Figure 5 、 Figure 8 and Figure 9 shown, the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are in a horizontally placed "U" shape, and the phase center of each antenna unit is close to one end of the "U" bottom of the "U" - shaped opening slot and far from the closed end of the antenna unit.

[0048] It should be noted that the opening direction of the antenna is related to the polarization direction of the antenna unit. The polarization direction of the antenna unit in the above example is set to horizontal, so the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are in a horizontally placed "U" shape. However, according to different applications, it is not limited to horizontal. For example, when the polarization direction of the antenna unit is vertical, the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are in a vertically placed "U" shape.

[0049] In one embodiment, the phase center spacing between at least two of the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 is greater than the geometric center spacing.

[0050] That is, the phase center spacing between the adjacent first antenna unit 17a1 and the third antenna unit 17a3 is greater than the geometric center spacing, and / or the phase center spacing between the adjacent second antenna unit 17a2 and the third antenna unit 17a3 is greater than the geometric center spacing.

[0051] In one embodiment, the opening directions of the second opening slot 17h2 and the third opening slot 17h3 are opposite. The opening direction of the first opening slot 17h1 is not limited.

[0052] In a preferred example, as Figure 5 shown, the opening directions of the first opening slot 17h1 and the third opening slot 17h3 are the same, and the opening directions of the second opening slot 17h2 and the third opening slot 17h3 are opposite. Thus, the phase center spacing between the first antenna unit 17a1 and the third antenna unit 17a3 is C, the geometric center spacing is B, and the phase center spacing is larger than the geometric center spacing.

[0053] In one embodiment, the opening directions of the first opening slot 17h1 and the third opening slot 17h3 are opposite. The opening direction of the second opening slot 17h2 is not limited.

[0054] In a preferred example, the opening directions of the first opening slot 17h1 and the third opening slot 17h3 are opposite, and the opening directions of the second opening slot 17h2 and the third opening slot 17h3 are opposite. Thus, the phase center spacing between the first antenna unit 17a1 and the third antenna unit 17a3 is larger than the geometric center spacing, and the phase centers of the second antenna unit 17a2 and the third antenna unit 17a3 are misaligned, achieving that the phase center spacing between the second antenna unit 17a2 and the third antenna unit 17a3 is larger than the geometric center spacing.

[0055] It should be noted that the above-listed combination cases of the opening directions of the antenna units in the UWB antenna array are given, but the combination methods are not limited to the above examples. According to the combination methods, there are various combination methods to make the phase centers of at least two antenna units farthest apart, and the opening direction of the other antenna unit is not limited.

[0056] In the above embodiments, since the phase center spacing is greater than the geometric center spacing, while ensuring that the phase center interval between the antenna units is close to half a wavelength, the geometric center spacing between two antennas can be reduced. Thus, not only can the physical size of the antenna be greatly reduced, but also good PDOA characteristics can be obtained, that is, good angle measurement performance can be obtained.

[0057] In one embodiment, the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 are all planar inverted F-shaped antennas (PIFA antennas) with a quarter-wave mode radiation respectively.

[0058] The phase center of the PIFA antenna is on the side of the opening slot of the antenna. As Figure 10 shown, m3 is the feeding point of the PIFA antenna, m2 is the feeding point of the PIFA antenna, m1 is the phase center of the PIFA antenna. The phase center of the PIFA antenna deviates from one side of the geometric center of the antenna, and the size of the PIFA antenna is approximately equal to a quarter wavelength (λ / 4). In this way, the size of each antenna unit is reduced by half compared to the half-wave patch antenna.

[0059] In this embodiment, by using the PIFA antenna as the antenna unit of the ultra-wideband antenna array, while reducing the area of the ultra-wideband antenna array, a large phase center spacing can be obtained with a small physical size, so as to ensure that the ultra-wideband antenna array has good antenna performance and good angle measurement accuracy.

[0060] Based on the previous embodiment, the opening directions of the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 can be set to be the same.

[0061] In this embodiment, the opening directions of the first opening slot 17h1, the second opening slot 17h2, and the third opening slot 17h3 are set to be the same. In this way, when the ultra-wideband antenna array is arranged in the terminal, the opening directions 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, so that the first phase center 17h1 corresponding to the first antenna unit 17a1, the second phase center 17h2 corresponding to the second antenna unit 17a2, and the third phase center 17h3 corresponding to the third antenna unit 17a3 are far away from the camera module, thereby reducing the influence of the antenna unit on the camera module.

[0062] It should be noted that the above embodiments list the optimal embodiments of the relationship between the phase centers of the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 and the devices that have a great influence on the antenna performance such as the camera module. It can be understood that the phase centers of two of the three antenna units can be far away from the camera module, and the opening slot direction of the other antenna unit can be rotated by various angles such as up, down, left, and right, which are all feasible.

[0063] In one embodiment, the antenna array includes a first structural layer L1, a second structural layer L2, and a third structural layer L3 that are stacked in sequence;

[0064] Among them, the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit 17a3, and the fourth antenna unit 17a4 are disposed on the first structural layer L1;

[0065] The feeding signal lines of the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit 17a3, and the fourth antenna unit 17a4 are disposed on the second structural layer L2, and the orthographic projection positions of the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit 17a3, and the fourth antenna unit 17a4 on the second structural layer L2 are set as clearances;

[0066] The reference metal ground is disposed on the third structural layer L3.

[0067] Among them, the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit 17a3, and the fourth antenna unit 17a4 are disposed on the first structural layer L1; the feeding signal lines of the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit 17a3, and the fourth antenna unit 17a4 are disposed on the second structural layer L2, and the orthographic projection positions of the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit, and the fourth antenna unit 17a4 on the second structural layer L2 are set as clearances; the third structural layer L3 is provided with a reference metal ground.

[0068] In this embodiment, the ultra-wideband antenna array is made of a flexible circuit board, and materials such as Liquid Crystal Polymer (LCP), Modified Polyimide (MPI), and Polyimide (PI) can be used to form the antenna circuit through processes such as copper plating. Specifically, the flexible circuit board is arranged with three layers of traces, namely the first structural layer L1, the second structural layer L2, and the third structural layer L3. The first structural layer L1 is used to arrange the radiation structure of the antenna, the second structural layer L2 arranges the feeding signal lines of the antenna, and the third structural layer L3 arranges the complete reference metal ground 17d.

[0069] Exemplarily, as Figure 4 shown, it shows a complete flexible circuit board, as Figures 5 to 7 shown, which respectively shows the first structural layer L1, the second structural layer L2, and the third structural layer L3 stacked in sequence from top to bottom.

[0070] As Figure 4 and 5In it, the first structural layer L1 is provided with a radiation structure including: a first antenna unit 17a1, a second antenna unit 17a2, a third antenna unit 17a3, and a fourth antenna unit 17a4. The first antenna unit 17a1 is provided with a first feeding contact point 17b1, the second antenna unit 17a2 is provided with a second feeding contact point 17b2, the third antenna unit 17a3 is provided with a third feeding contact point 17b3, and the fourth antenna unit 17a4 is provided with a fourth feeding contact point 17b4.

[0071] Specifically, a plurality of first grounding holes 17c1 are provided at the closed end of the first antenna unit 17a1, a plurality of second grounding holes 17c2 are provided at the closed end of the second antenna unit 17a2, and a plurality of third grounding holes 17c3 are provided at the closed end of the third antenna unit 17a3. In this way, each antenna unit is equivalent to a PIFA antenna, and the antenna size A is approximately equal to one-quarter of the wavelength of the antenna operating frequency, which is approximately half smaller than the size of a half-wavelength patch antenna.

[0072] As Figure 6 shown in, the second structural layer L2 includes a first feeding signal line 17e1 of the first antenna unit 17a1, a second feeding signal line 17e2 of the second antenna unit 17a2, and a third feeding signal line 17e3 of the third antenna unit 17a3; and a metal ground 17d is provided in the peripheral area of each feeding signal line; the orthographic projection area of each antenna unit in the second structural layer L2 (such as Figure 5 the first area 17i1, the second area 17i2, the third area 17i3, and the fourth area 17i4 in) is provided with clearance, and the corresponding metal layer is peeled off.

[0073] As an implementation method, the third antenna unit 17a3 and the fourth antenna unit 17a4 share the third feeding signal line 17e3. As Figure 5 shown, the third feeding signal line 17e3 bifurcates at the end of the signal line and is respectively connected to the corresponding antenna units through the third feeding contact point 17b3 and the fourth feeding contact point 17b4.

[0074] As another implementation method, a combiner or a radio frequency switch can also be added at the radio frequency architecture end to integrate the feeding signal lines of the above-mentioned third antenna unit 17a3 and the fourth antenna unit 17a4 and connect them into the UWB chip (Integrated Circuit, IC).

[0075] As Figure 6 shown, the third structural layer L3 is provided with a complete reference metal ground 17d to constrain the impedance of the feeding signal line and at the same time serve as the ground of the antenna unit. The third structural layer L3 is also provided with a contact point 17f connected to the motherboard BTB connector 20.

[0076] It should also be noted that the above-mentioned first feeding signal line 17e1 is connected to the first feeding contact point 17b1, the second feeding signal line 17e2 is connected to the second feeding contact point 17b2, and the third feeding signal line 17e3 is connected to the third feeding contact point 17b3. The connection method is copper plating by drilling holes in adjacent two layers. The metal ground layers of the above-mentioned first structural layer L1, second structural layer L2 and third structural layer L3 are connected by copper plating through a plurality of through holes.

[0077] In one embodiment, the fourth antenna unit 17a4 is a half-wavelength patch antenna, or the fourth antenna unit is a planar inverted-F antenna radiating in a quarter-wave mode.

[0078] Exemplarily, as Figure 5 shown, the fourth antenna unit 17a4 is a half-wavelength patch antenna and is disposed between the first antenna unit 17a1 and the third antenna unit 17a3.

[0079] Exemplarily, as Figure 8 shown, the fourth antenna unit is a PIFA antenna radiating in a quarter-wave mode and is disposed between the first antenna unit 17a1 and the third antenna unit 17a3.

[0080] Exemplarily, as Figure 9 shown, the fourth antenna unit 17a4 is a PIFA antenna radiating in a quarter-wave mode and is disposed between the second antenna unit 17a2 and the third antenna unit 17a3. Figure 9 In, the feeding signal line of the fourth antenna unit 17a4 is in the second structural layer L2, Figure 9 not shown.

[0081] It should be noted that the fourth antenna unit in the above embodiment only needs to have a ranging function. Therefore, neither the antenna type nor the polarization direction of the fourth antenna unit will be restricted. The antenna types in the above embodiments are only exemplary and not limited thereto.

[0082] In one embodiment, a metal ground is provided between adjacent two of the first antenna unit 17a1, the second antenna unit 17a2, the third antenna unit 17a3 and the fourth antenna unit 17a4.

[0083] In this embodiment, a metal ground 17d is provided between adjacent two antenna units, which can improve the isolation degree between adjacent two antenna units.

[0084] Please refer to Figures 11 to 16 , an embodiment of the present invention also provides an electronic device 10, including: the ultra-wideband antenna array 17 as described above.

[0085] Among them, the electronic device includes but is not limited to mobile phones, tablet computers, laptop computers, handheld computers, vehicle-mounted terminal devices, wearable devices, and pedometers, etc.

[0086] The electronic device may be provided with a wireless communication circuit, and the wireless communication circuit can be used to support wireless communication in multiple wireless communication bands. The communication bands processed by the wireless communication circuit (sometimes referred to as frequency bands in this article) may include satellite navigation system communication bands, cellular phone communication bands, wireless local area network communication bands, near field communication bands, ultra-wideband communication bands, or other wireless communication bands.

[0087] Exemplarily, as Figures 11 to 13 shown, the electronic device 10 may have a display, and the display 11 may be installed on the front of the electronic device 10, as Figure 11 shown. The display 11 may be a touch screen combined with capacitive touch electrodes or insensitive to touch. The electronic device 10 may include a housing, such as Figures 10 to 11 the rear housing 12 in , and a middle housing 13 is provided between the rear housing 12 and the display 11. The middle housing 13 may be made of metal, and a plurality of breakpoints 15 are provided on the middle housing 13.

[0088] In one embodiment, the electronic device 10 further includes: a camera module;

[0089] When the opening directions 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 are the same, the opening direction is opposite to the side where the camera module is located.

[0090] Exemplarily, as Figures 12 to 16 shown, a plurality of camera modules 14 are provided directly below the rear housing 12, and the opening directions of the antenna units of the ultra-wideband antenna array 17 are away from the camera module, that is, the phase center is far from the camera module to avoid the influence of the camera module on the antenna performance.

[0091] In one embodiment, the electronic device 10 further includes: a housing and a main board disposed in the housing;

[0092] Among them, an antenna chip is provided on the main board 18, and the ultra-wideband antenna array 17 is electrically connected to the antenna chip.

[0093] As Figure 13 shown, when hiding Figure 11After the rear shell 12, a main board bracket 16 is provided directly below the rear shell 12. The above-mentioned ultra-wideband antenna array 17 is provided on the main board bracket 16. The main board bracket 16 can be made of metal, and an opening 160 is provided in the middle area thereof to facilitate the UWB antenna to pass through the opening 160 and be electrically connected to the main board 18. A plurality of screw holes 161, 162, 163, 164 are provided in the peripheral area of the ultra-wideband antenna array 17. Screws are used in the screw holes to fix and conduct the main board bracket 16 to the main board to ground, facilitating the installation of the UWB antenna array.

[0094] As Figure 15 and 16 shown, after hiding the main board bracket 16, it can be seen that a main board 18 is provided directly above the middle shell 13 (i.e., below the main board bracket 16). A shielding cover 19 is provided on the main board 18, and a BTB connector 20 is provided on one side of the shielding cover 19; a UWB chip is provided inside the main board, and the BTB connector 20 is used to connect the UWB chip on the main board to each antenna unit in the UWB antenna array 17.

[0095] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0096] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present application.

[0097] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A ultra-wideband antenna array, characterized in that, Comprising: A first antenna unit, a second antenna unit, a third antenna unit, and a fourth antenna unit; Wherein, the fourth antenna unit is disposed between the first antenna unit and the third antenna unit; or, the fourth antenna unit is disposed between the second antenna unit and the third antenna unit; and a first distance and a second distance are less 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; The first antenna unit, the second antenna unit, and the third antenna unit support a first operating frequency band, and the fourth antenna unit supports a second operating frequency band; and the first operating frequency band is different from the second operating frequency band; The phase centers of the first antenna unit, the second antenna unit, and the third antenna unit deviate from the geometric center.

2. The ultra-wideband antenna array according to claim 1, characterized in that, The phase center spacing between at least two of the first antenna unit, the second antenna unit, and the third antenna unit is greater than the geometric center spacing.

3. The ultra-wideband antenna array according to claim 1, wherein The first antenna unit has a first opening slot, the second antenna unit has a second opening slot, the third antenna unit has a third opening slot, and the first phase center of the first antenna unit is located at one end where the bottom of the first opening slot is located, the second phase center of the second antenna unit is located at one end where the bottom of the second opening slot is located, and the third phase center of the third antenna unit is located at one end where the bottom of the third opening slot is located.

4. The ultra-wideband antenna array according to claim 3, wherein The opening directions of the second opening slot and the third opening slot are opposite.

5. The ultra-wideband antenna array according to claim 3, wherein The opening directions of the first opening slot and the third opening slot are opposite.

6. The ultra-wideband antenna array according to claim 1, wherein The first antenna unit, the second antenna unit, and the third antenna unit are all planar inverted-F antennas with a quarter-wave mode radiation.

7. The antenna array according to claim 6, characterized in that, The opening directions of the first opening slot of the first antenna unit, the second opening slot of the second antenna unit, and the third opening slot of the third antenna unit are the same.

8. The ultra-wideband antenna array according to claim 1, wherein The antenna array includes a first structural layer, a second structural layer, and a third structural layer that are sequentially stacked; Wherein, the first antenna unit, the second antenna unit, the third antenna unit, and the fourth antenna unit (17a4) are disposed on the first structural layer; The feeding signal lines of the first antenna unit, the second antenna unit, the third antenna unit, and the fourth antenna unit are disposed on the second structural layer, and the orthographic projection positions of the first antenna unit, the second antenna unit, the third antenna unit, and the fourth antenna unit on the second structural layer are set to be clearances; A reference metal ground is disposed on the third structural layer.

9. The ultra-wideband antenna array according to claim 1, wherein The third antenna unit and the fourth antenna unit share a feeding signal line.

10. The ultra-wideband antenna array according to claim 1, wherein The fourth antenna unit is a half-wavelength patch antenna, or the fourth antenna unit is a planar inverted-F antenna with a quarter-wave mode radiation.

11. The ultra-wideband antenna array according to claim 1, wherein A metal ground is disposed between adjacent two of the first antenna unit, the second antenna unit, the third antenna unit, and the fourth antenna unit.

12. An electronic device, characterized in that, Comprising: The ultra-wideband antenna array according to any one of claims 1 to 11.

13. The electronic device according to claim 12, wherein Further comprising: A camera module; When the opening directions of the first opening slot of the first antenna unit, the second opening slot of the second antenna unit, and the third opening slot of the third antenna unit of the ultra-wideband antenna array are the same, the opening direction is opposite to the side where the camera module is located.

14. The electronic device according to claim 12, wherein Further comprising: a housing and a main board disposed in the housing; Wherein, an antenna chip is disposed on the main board, and the ultra-wideband antenna array is electrically connected to the antenna chip.

Images