CN114583446A - Ultra-bandwidth antenna array and electronic equipment - Google Patents
Ultra-bandwidth antenna array and electronic equipment Download PDFInfo
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- CN114583446A CN114583446A CN202210347400.4A CN202210347400A CN114583446A CN 114583446 A CN114583446 A CN 114583446A CN 202210347400 A CN202210347400 A CN 202210347400A CN 114583446 A CN114583446 A CN 114583446A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application discloses ultra-wideband antenna array and electronic equipment, and belongs to the technical field of electronic products. The ultra-wideband antenna array comprises: the antenna comprises a first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit; the fourth antenna unit is arranged between the first antenna unit and the third antenna unit; or the fourth antenna unit is arranged 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 working frequency band, and the fourth antenna unit supports a second working frequency band; the first working frequency band is different from the second working frequency band; the phase centers of the first antenna element, the second antenna element and the third antenna element are offset from the geometric center.
Description
Technical Field
The application belongs to the technical field of electronic products, and particularly relates to an ultra-wideband antenna array and electronic equipment.
Background
With the development of 5G communication technology, the world of everything interconnection is coming, and users have more and more requirements on the functions of electronic equipment, and higher requirements are put forward on convenience and intellectualization. One of the important applications is indoor positioning, object finding, and the like, which are introduced into electronic equipment, and the function is realized by using Ultra Wide Band (UWB) technology, and if the technology needs to obtain a good experience effect, the technology puts forward a higher requirement on the performance of an antenna. Including high bandwidth of the antenna, stable phase characteristics, stable Group Delay in spatial angle (Group Delay), good Fidelity Factor of response characteristics, etc. In order to obtain the above better characteristics, not only a specific antenna needs to be designed, but also a reasonable layout is needed, and the characteristics of the material process of the antenna also need to be considered.
Based on the application scenario and ecological layout of UWB, some alliance organizations make some requirements on the performance and parameters of UWB, such as mandatory requirement for supporting frequency band 9(Channel9), and the Channel9 needs to have the capability of distance measurement and angle measurement; or, the UWB device needs to support frequency band 5(Channel5) and Channel9, and the Channel5 needs to support the ranging capability.
At present, a schematic diagram of a commonly used UWB radio frequency architecture is shown in fig. 1, and includes four UWB antennas, wherein a positioning antenna includes three antennas (ant.v, ant.h, and ant.com in fig. 1), and has positioning and ranging functions, 4 in fig. 1thThe antenna has a ranging function. Wherein, Ant.Com.and 4 in the antenna are positionedthThe antenna has the capability to transmit and receive signals.
On one hand, in the existing UWB antenna scheme, three positioning antennas are usually designed by using a half-wavelength patch antenna, and the phase center of the three positioning antennas generally has a small difference from the geometric center (e.g., m1 is the phase center and m2 is the feed point in fig. 2), and in order to obtain a good angle measurement precision, the distance setting of the antennas generally needs to be close to the half-wavelength, that is, the distance between the phase centers is close to the half-wavelength, so that the size of the antennas is large, and the distance between the antennas is also large; on the other hand, multiple antennas of the UWB antenna are respectively provided with two frequency bands supporting Channel5 and Channel9, so that the antenna space occupied by the whole antenna system is large. However, due to the increase of the number and the occupied space of the camera modules in the terminal and the increase of the number and the occupied space of the cellular antennas or the non-cellular antennas, the antenna space reserved for the UWB is small, and therefore, the existing UWB antenna scheme often cannot be arranged in the terminal due to the large occupied space.
Disclosure of Invention
An object 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.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides an ultra-wideband antenna array, including: the antenna comprises a first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit; the fourth antenna unit is arranged between the first antenna unit and the third antenna unit; or the fourth antenna unit is arranged between the second antenna unit and the third antenna unit; the first distance and the second distance are smaller than the third distance; the first distance is a distance between the first antenna unit and the third antenna unit, the second distance is a distance between the second antenna unit and the third antenna unit, and the third distance is a 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 working frequency band, and the fourth antenna unit supports a second working frequency band; the first working frequency band is different from the second working frequency band; the phase centers of the first antenna element, the second antenna element and the third antenna element are offset from the geometric center.
In a second aspect, an embodiment of the present application provides an electronic device, including: the ultra-wideband antenna array of the first aspect.
In an embodiment of the present application, an ultra-wideband antenna array includes: the antenna comprises a first antenna unit, a second antenna unit, a third antenna unit and a fourth 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, and further, a fourth antenna unit is arranged between the adjacent first antenna unit and the third antenna unit; or the fourth antenna unit is arranged 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 working frequency band, and the fourth antenna unit supports a second working frequency band; the first working frequency band is different from the second working frequency band; because the phase centers of the first antenna unit, the second antenna unit and the third antenna unit deviate from the geometric center, the arrangement positions of the first antenna unit, the second antenna unit and the third antenna unit can be reasonably adjusted according to the internal environment of the electronic equipment, the phase center distance between the two antenna units can be smaller than the geometric center distance, the two antenna units are arranged more tightly, and therefore the occupied space of the ultra-bandwidth antenna array is reduced while the ultra-bandwidth antenna array is ensured to have better antenna performance. And by arranging a fourth antenna element between adjacent first and third antenna elements; or the fourth antenna unit is arranged between the adjacent second antenna unit and the third antenna unit, so that the ultra-wideband antenna array has distance measurement capability and better angle measurement accuracy while the occupied space of the ultra-wideband antenna array is reduced.
Drawings
FIG. 1 shows a schematic view of angle measurement;
FIG. 2 shows a schematic diagram of a half-wavelength patch antenna;
FIG. 3 illustrates a UWB radio frequency architecture schematic;
fig. 4 is a schematic diagram of an ultra-wideband antenna array according to an embodiment of the present invention;
fig. 5 is a second schematic diagram of an ultra-wideband antenna array according to an embodiment of the present invention;
fig. 6 is a third schematic diagram of an ultra-wideband antenna array according to an embodiment of the invention;
fig. 7 is a fourth schematic diagram of an ultra-wideband antenna array according to an embodiment of the invention;
fig. 8 is a fifth schematic diagram of an ultra-wideband antenna array according to an embodiment of the invention;
fig. 9 shows a sixth schematic structural diagram of an ultra-wideband antenna array according to an embodiment of the invention;
fig. 10 shows a schematic diagram of a planar inverted-F antenna according to an embodiment of the invention;
FIG. 11 is a schematic structural diagram of an electronic device according to an embodiment of the invention;
FIG. 12 is a second schematic structural diagram of an electronic device according to an embodiment of the invention;
FIG. 13 is a third schematic view of an electronic apparatus according to an embodiment of the invention;
FIG. 14 is a schematic view of a motherboard bracket according to an embodiment of the invention;
FIG. 15 is a fourth schematic view of an electronic device according to an embodiment of the present invention;
fig. 16 is a fifth schematic view showing a structure of an electronic apparatus according to an embodiment of the present invention.
Description of the reference numerals:
10-an electronic device; 11-a display; 12-a rear shell; 13-mesochite; 14-a camera module; 15-a breakpoint; 16-a main board support; 160-opening; 161 to 164-screw holes; 17-ultra wideband antenna array; 17a 1-first antenna element; 17a 2-a second antenna element; 17a 3-third antenna element; 17a 4-fourth antenna element; 17b1 — first feed contact point; 17b2 — second feed contact; 17b 3-third feed contact point; 17b 4-fourth feed contact point; 17c 1-first lower ground hole; 17c 2-second lower ground hole; 17c 3-third lower ground hole; 17 d-metal ground; 17e1 — first feeding signal line; 17e2 — second feeding signal line; 17e 3-third feeding signal line; 17 f-contact point; 17g1 — first phase center; 17g 2-second phase center; 17g 3-third phase center; 17h1 — first open slot; 17h2 — second open slot; 17h 3-third opening groove; 17i1 — first region; 17i2 — second region; 17i 3-third area; 17i 4-fourth region; 17 f-contact 18-motherboard; 19-a shield; 20-Board-To-Board Connectors (Board-To-Board Connectors, BTB); l1 — first structural layer; l2 — second structural layer; l3-third structural layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
Referring to fig. 3, the following describes that when the UWB antenna is used to realize the angle and distance measurement function, the phase center distance of the antenna elements is close to a half wavelength.
The Angle measurement function is based on the Angle Of Arrival (AOA) principle, and the AOA is calculated by the Phase Difference Of Arrival (PDOA). Theoretically, the phase difference of PDOA is calculated by the following formula:
wherein the content of the first and second substances,
is the phase difference, d is the electrical spacing of the antennas (i.e., the phase center spacing), λ is the operating wavelength, and θ is the angle of the incoming wave.
In particular, the amount of the solvent to be used,
the specific derivation process of (1) is as follows:
firstly, when the distance D between the measured object and the terminal is more than a few wavelengths, D>>d, can be regarded as θ1＝θ2θ; secondly, after the incoming wave front reaches the first antenna, an extra distance d is required to reach the second antenna1Dcos θ; thus, the distance
From this it is deduced: phase difference
It is further obtained that,
in order to avoid affecting the results of the AOA,
must be less than 180 deg., so that d needs to be set to
Where λ is the wavelength corresponding to the operating frequency.
From the above, the UWB antenna calculates the incoming wave angle θ from the phase difference between the arrival signals of the two antenna elements at the distance d, and according to the angle measurement principle, the proper electrical distance (i.e., the distance between the phase centers) can obtain a good angle measurement accuracy.
The ultra-wideband antenna array provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 4 to 10, an embodiment of the invention provides an ultra-wideband antenna array, including: a first antenna element 17a1, a second antenna element 17a2, a third antenna element 17a3 and a fourth antenna element 17a 4; the fourth antenna element 17a4 is disposed between the adjacent first antenna element 17a1 and the third antenna element 17a 3; alternatively, the fourth antenna element 17a4 is disposed between the adjacent second antenna element 17a2 and the third antenna element 17a 3; the first distance and the second distance are smaller than the third distance; wherein the first distance is a distance between the first antenna element 17a1 and the third antenna element 17a3, the second distance is a distance between the second antenna element 17a2 and the third antenna element 17a3, and the third distance is a distance between the first antenna element 17a1 and the second antenna element 17a 2; the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 support a first operating frequency band, and the fourth antenna element 17a4 supports a second operating frequency band; the first working frequency band is different from the second working frequency band; 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.
The first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 are distributed 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.
Optionally, the first operating frequency band is Channel9 and can be used for angle measurement and distance measurement, and the second operating frequency band is Channel5 and can be used for distance measurement.
In this embodiment, the first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3, and the fourth antenna element are radiation structures of a 17a4 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 the second direction for horizontal positioning; the first direction and the second direction are perpendicular to each other, so that the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 are substantially L-shaped. In particular, the phase center of each of the first antenna unit 17a1, the second antenna unit 17a2, and the third antenna unit 17a3 deviates from one side of the geometric center of the antenna, so that the three antennas are reasonably arranged, the phase center distance between the two antenna units can be smaller than the geometric center distance, the two antenna units are arranged more closely, and the occupied space of the ultra-wideband antenna array is reduced while the ultra-wideband antenna array is ensured to have better angle measurement accuracy.
Meanwhile, the fourth antenna element 17a4 for ranging is disposed between the adjacent first antenna element 17a1 and third antenna element 17a 3; or, set up between adjacent second antenna element 17a2 and third antenna element 17a3, be about to support the fourth antenna element of range finding to set up in the clearance of three positioning antenna, can make full use of three positioning antenna's space, so, can realize that the shared area of antenna array reduces by a wide margin, make the UWB antenna support simultaneously and fix a position and range finding function, and make the feed signal line of whole ultra-wideband antenna array have higher line degree of freedom. That is, the fourth antenna unit supporting ranging is arranged in the gap between the three positioning antennas, so that the antenna size is not increased, the radio frequency architecture is not changed, more antenna frequency bands are considered, and more application scenarios are adapted.
In an embodiment, the first antenna unit 17a1 has a first open slot 17h1, the second antenna unit 17a2 has a second open slot 17h2, the third antenna unit 17a3 has a third open slot 17h3, the first phase center 17g1 of the first antenna unit 17a1 is located at an end of the first open slot 17h1 where the slot bottom is located, the second phase center 17g2 of the second antenna unit 17a2 is located at an end of the second open slot 17h2 where the slot bottom is located, and the third phase center 17g3 of the third antenna unit 17a3 is located at an end of the third open slot 17h3 where the slot bottom is located.
In this embodiment, the first open groove 17h1, the second open groove 17h2, and the third open groove 17h3 are used to radiate electromagnetic waves to the outside.
Illustratively, as shown in fig. 4, 5, 8 and 9, the first opening groove 17h1, the second opening groove 17h2 and the third opening groove 17h3 are in a transverse "U" shape, and the phase center of each antenna unit is close to one end of the "U" shaped bottom of the "U" shaped opening groove and far from the closed end of the antenna unit.
Note that the opening orientation of the antenna is related to the polarization direction of the antenna element, and the polarization direction of the antenna element in the above example is set to be horizontal, so that the first open groove 17h1, the second open groove 17h2, and the third open groove 17h3 are in a "U" shape placed laterally. However, it may not be limited to the lateral direction according to various applications, for example, the first opening groove 17h1, the second opening groove 17h2, and the third opening groove 17h3 are in a "U" shape placed longitudinally when the polarization direction of the antenna unit is vertical.
In an 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.
That is, the phase center spacing between the adjacent first antenna element 17a1 and third antenna element 17a3 is greater than the geometric center spacing, and/or the phase center spacing between the adjacent second antenna element 17a2 and third antenna element 17a3 is greater than the geometric center spacing.
In one embodiment, the second opening groove 17h2 is open in the opposite direction to the third opening groove 17h 3. The opening orientation of the first opening groove 17h1 is not limited.
In a preferred example, as shown in fig. 5, the first opening groove 17h1 and the third opening groove 17h3 have the same opening direction, and the second opening groove 17h2 and the third opening groove 17h3 have the opposite opening direction, so that the phase center distance between the first antenna element 17a1 and the third antenna element 17a3 is C, the geometric center distance is B, and the phase center distance is larger than the geometric center distance.
In one embodiment, the first opening groove 17h1 is open in the opposite direction to the third opening groove 17h 3. The opening orientation of the second opening groove 17h2 is not limited.
In a preferred example, the first open slot 17h1 and the third open slot 17h3 are opposite in opening direction, and the second open slot 17h2 and the third open slot 17h3 are opposite in opening direction, so that the phase center distance between the first antenna element 17a1 and the third antenna element 17a3 is larger than the geometric center distance, and the phase centers of the second antenna element 17a2 and the third antenna element 17a3 are offset, so that the phase center distance between the second antenna element 17a2 and the third antenna element 17a3 is larger than the geometric center distance.
It should be noted that, although the above-mentioned UWB antenna array has been exemplified by combining the opening orientations of the antenna elements, the combination is not limited to the above example, and there are various combinations in which the phase centers of at least two antenna elements are farthest from each other, and the opening orientation of another antenna element is not limited.
In the above embodiment, since the phase center distance is larger than the geometric center distance, the geometric center distance between the two antennas can be reduced while the phase center distance between the antenna units is ensured to be close to one-half wavelength, so that the physical size of the antennas can be greatly reduced, and a good PDOA characteristic can be obtained, i.e., a good angle measurement performance can be obtained.
In one embodiment, the first Antenna element 17a1, the second Antenna element 17a2, and the third Antenna element 17a3 are each Planar Inverted-F (PIFA) antennas that radiate in quarter-wave mode.
The phase center of the PIFA antenna is on the open slot side of the antenna, as shown in fig. 10, m3 is the feed point of the PIFA antenna, m2 is the feed point of the PIFA antenna, m1 is the phase center of the PIFA antenna, the phase center of the PIFA antenna is offset 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). Thus, the size of each antenna unit is reduced by half compared with the half-wave patch antenna.
In the embodiment, the PIFA antenna is used as the antenna unit of the ultra-wideband antenna array, so that the area of the ultra-wideband antenna array can be reduced, and meanwhile, the larger phase center distance can be obtained with a smaller physical size, and the ultra-wideband antenna array is ensured to have better antenna performance and better angle measurement precision.
Based on the above embodiment, the opening orientations of the first opening groove 17h1, the second opening groove 17h2, and the third opening groove 17h3 may be set to be the same.
In this embodiment, the opening orientations of the first open slot 17h1, the second open slot 17h2, and the third open slot 17h3 are set to be the same, so that when the ultra-wideband antenna array is set in the terminal, the openings of the first open slot 17h1, the second open slot 17h2, and the third open slot 17h3 face 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 away from the camera module, thereby reducing the influence of the camera module on the antenna unit.
Note that the above embodiments exemplify the most preferable embodiments of the relationship between the phase centers of the first antenna element 17a1, the second antenna element 17a2, and the third antenna element 17a3 and the device such as the camera module, which has a large influence on the antenna performance. 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 direction of the open slot of the other antenna unit can be various rotation angles such as up, down, left, right, and the like.
In one embodiment, the antenna array includes a first structural layer L1, a second structural layer L2, and a third structural layer L3, which are sequentially stacked;
the first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3, and the fourth antenna element 17a4 are disposed on the first structural layer L1;
feeding signal lines of the first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3 and the fourth antenna element 17a4 are disposed on the second structural layer L2, and forward projection positions of the first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3 and the fourth antenna element 17a4 on the second structural layer L2 are set to be clearance;
a reference metal is disposed on the third structural layer L3.
The first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3 and the fourth antenna element 17a4 are disposed on the first structural layer L1; feeding signal lines of the first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3 and the fourth antenna element 17a4 are disposed on the second structural layer L2, and orthographic projection positions of the first antenna element 17a1, the second antenna element 17a2, the third antenna element and the fourth antenna element 17a4 on the second structural layer L2 are set to be clearance; the third structural layer L3 is provided with a reference metal ground.
In this embodiment, the ultra-wideband antenna array is made of a flexible printed circuit board, and the lines of the antenna may be formed by using materials such as Liquid Crystal Polymer (LCP), Polyimide (MPI), Polyimide (PI), and the like through processes such as copper plating. Specifically, the flexible circuit board is configured as three layers of traces, namely a first structural layer L1, a second structural layer L2, and a third structural layer L3, where the first structural layer L1 is used to set a radiation structure of the antenna, the second structural layer L2 is used to set a feeding signal line of the antenna, and the third structural layer L3 is used to set a complete reference metal ground 17 d.
Illustratively, as shown in fig. 4, a complete flexible circuit board is shown, and as shown in fig. 5 to 7, a first structural layer L1, a second structural layer L2 and a third structural layer L3 are respectively shown, which are sequentially stacked from top to bottom.
As shown in fig. 4 and 5, the first structure layer L1 having the radiation structure therein includes: the first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3 and the fourth antenna element 17a4, and the first antenna element 17a1 is provided with a first feeding contact point 17b1, the second antenna element 17a2 is provided with a second feeding contact point 17b2, the third antenna element 17a3 is provided with a third feeding contact point 17b3, and the fourth antenna element 17a4 is provided with a fourth feeding contact point 17b 4.
Specifically, the closed end of the first antenna element 17a1 is provided with a plurality of first lower ground holes 17c1, the closed end of the second antenna element 17a2 is provided with a plurality of second lower ground holes 17c2, and the closed end of the third antenna element 17a3 is provided with a plurality of third lower ground holes 17c3, so that each antenna element corresponds to a PIFA antenna, and the antenna size a is approximately equal to a quarter wavelength of the operating frequency of the antenna, and is reduced by approximately half compared to a half-wavelength patch antenna.
As shown in fig. 6, the second structural layer L2 includes the first feeding signal line 17e1 of the first antenna element 17a1, the second feeding signal line 17e2 of the second antenna element 17a2, and the third feeding signal line 17e3 of the third antenna element 17a 3; and the peripheral area of each feed signal line is provided with a metal ground 17 d; each antenna unit is provided with clearance in the front projection area (such as the first area 17i1, the second area 17i2, the third area 17i3 and the fourth area 17i4 in fig. 5) of the second structural layer L2, and the corresponding metal layer is stripped.
As an implementation, the third antenna element 17a3 and the fourth antenna element 17a4 share a third feeding signal line 17e 3. As shown in fig. 5, the third feeding signal line 17e3 is divided into two at the ends of the signal line, and is connected to the corresponding antenna element through the third feeding contact point 17b3 and the fourth feeding contact point 17b4, respectively.
As another implementation, a combiner or a radio frequency switch may be added to the radio frequency architecture end to integrate the feeding signal lines of the third antenna element 17a3 and the fourth antenna element 17a4, and then the Integrated Circuit (IC) is connected to the UWB chip.
As shown in fig. 6, the third structural layer L3 is provided with a complete reference metal ground 17d for confining the impedance of the feeding signal line, while the third structural layer L3 is provided with a contact point 17f connected to the main board BTB connector 20 as a ground of the antenna element.
It should be noted that the 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, and the connection modes are all two adjacent layers of punched copper-plated connections. The metal ground layers of the first structural layer L1, the second structural layer L2, and the third structural layer L3 are connected by a plurality of via-plated copper.
In one embodiment, the fourth antenna element 17a4 is a half-wavelength patch antenna or the fourth antenna element is a planar inverted-F antenna for quarter-wave mode radiation.
Illustratively, as shown in fig. 5, the fourth antenna element 17a4 is a half-wavelength patch antenna and is disposed between the first antenna element 17a1 and the third antenna element 17a 3.
Illustratively, as shown in fig. 8, the fourth antenna element is a PIFA antenna radiating in a quarter-wave mode and is disposed between the first antenna element 17a1 and the third antenna element 17a 3.
Illustratively, as shown in fig. 9, the fourth antenna element 17a4 is a PIFA antenna that radiates in a quarter-wave mode and is disposed between the second antenna element 17a2 and the third antenna element 17a 3. In fig. 9, the feeding signal line of the fourth antenna element 17a4 is in the second structural layer L2, which is not shown in fig. 9.
It should be noted that, the fourth antenna unit in the above embodiment only needs to have a ranging function, so neither the antenna type nor the polarization direction of the fourth antenna unit is limited, and the antenna type in the above embodiment is only exemplary, and is not limited thereto.
In an embodiment, a metal ground is disposed between two adjacent antenna elements of the first antenna element 17a1, the second antenna element 17a2, the third antenna element 17a3 and the fourth antenna element 17a 4.
In this embodiment, the metal ground 17d is provided between two adjacent antenna units, so that the isolation between the two adjacent antenna units can be improved.
Referring to fig. 11 to fig. 16, an embodiment of the invention further provides an electronic device 10, including: the ultra-wideband antenna array 17 described above.
The electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal device, a wearable device, a pedometer, and the like.
An electronic device may be provided with wireless communication circuitry that may be used to support wireless communications in multiple wireless communication bands. The communication bands (sometimes referred to herein as bands) handled by the wireless communication circuitry 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.
Illustratively, as shown in fig. 11 to 13, the electronic device 10 may have a display, and the display 11 may be mounted on the front surface of the electronic device 10, as shown in fig. 11. The display 11 may be a touch screen incorporating capacitive touch electrodes or may be insensitive to touch. The electronic device 10 may include a housing, such as a rear housing 12 shown in fig. 10 to 11, and a middle housing 13 disposed between the rear housing 12 and the display 11, wherein the middle housing 13 may be made of metal, and a plurality of breaking points 15 are disposed on the middle housing 13.
In one embodiment, the electronic device 10 further comprises: a camera module;
under the condition that the openings of the first open slot 17h1 of the first antenna unit 17a1, the second open slot 17h2 of the second antenna unit 17a2 and the third open slot 17h3 of the third antenna unit 17a3 of the ultra-wideband antenna array are in the same direction, the openings face to the opposite side of the camera module.
Exemplarily, as shown in fig. 12 to 16, a plurality of camera modules 14 are disposed right below the rear case 12, and the opening orientations of the antenna units of the ultra-wideband antenna array 17 deviate from the camera modules, that is, the phase centers are far away from the camera modules, so as to avoid the influence of the camera modules on the performance of the antennas.
In one embodiment, the electronic device 10 further comprises: the device comprises a shell and a main board arranged in the shell;
an antenna chip is arranged on the main board 18, and the ultra-wideband antenna array 17 is electrically connected with the antenna chip.
As shown in fig. 13, after the rear case 12 of fig. 11 is hidden, a main board bracket 16 is disposed under the rear case 12, the above-mentioned ultra-wideband antenna array 17 is disposed on the main board bracket 16, the main board bracket 16 may be made of metal, an opening 160 is disposed in a middle region of the main board bracket 16, so that the UWB antenna can pass through the opening 160 to be electrically connected to the main board 18, a plurality of screw holes 161, 162, 163, and 164 are disposed in a peripheral region of the ultra-wideband antenna array 17, and the screw holes use screws to fix, conduct, and ground the main board bracket 16 and the main board, so as to facilitate the installation of the UWB antenna array.
As shown in fig. 15 and 16, after the main board support 16 is hidden, it can be seen that a main board 18 is disposed right above the middle case 13 (i.e., below the main board support 16), a shield case 19 is disposed on the main board 18, and a BTB connector 20 is disposed on one side of the shield case 19; the mainboard is internally provided with a UWB chip, and the BTB connector 20 is used for connecting the UWB chip on the mainboard with each antenna unit in the UWB antenna array 17.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element identified by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (14)
1. An ultra-wideband antenna array, comprising: the antenna comprises a first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit;
wherein the fourth antenna element is disposed between the first antenna element and the third antenna element; or the fourth antenna unit is arranged between the second antenna unit and the third antenna unit; the first distance and the second distance are smaller than the third distance; the first distance is a distance between the first antenna unit and the third antenna unit, the second distance is a distance between the second antenna unit and the third antenna unit, and the third distance is a 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 working frequency band, and the fourth antenna unit supports a second working frequency band; the first working frequency band is different from the second working frequency band;
the phase centers of the first antenna element, the second antenna element, and the third antenna element are offset from a geometric center.
2. The ultra-wideband antenna array of claim 1, wherein a phase-centric spacing between at least two of the first, second, and third antenna elements is greater than a geometric-centric spacing.
3. The ultra-wideband antenna array of claim 1, wherein the first antenna element has a first open slot, the second antenna element has a second open slot, and the third antenna element has a third open slot, and wherein the first phase center of the first antenna element is located at an end of the first open slot where the slot bottom is located, the second phase center of the second antenna element is located at an end of the second open slot where the slot bottom is located, and the third phase center of the third antenna element is located at an end of the third open slot where the slot bottom is located.
4. The ultra-wideband antenna array of claim 3, wherein the second open slot is oppositely directed from the opening of the third open slot.
5. The ultra-wideband antenna array of claim 3, wherein the first open slots are oppositely directed from the openings of the third open slots.
6. The ultra-wideband antenna array of claim 1, wherein the first, second and third antenna elements are each planar inverted-F antennas radiating in a quarter-wave mode.
7. An antenna array according to claim 6 wherein the first open slot of the first antenna element, the second open slot of the second antenna element and the third open slot of the third antenna element have the same opening orientation.
8. The ultra-wideband antenna array of claim 1, wherein the antenna array comprises a first structural layer, a second structural layer, and a third structural layer sequentially stacked;
wherein the first, second, third and fourth antenna elements (17a4) are disposed on the first structural layer;
feeding signal lines of the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit are arranged on the second structural layer, and 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 clearance;
the reference metal is arranged on the third structural layer.
9. The ultra-wideband antenna array of claim 1, wherein the third antenna element and the fourth antenna element share a single feed signal line.
10. The ultra-wideband antenna array of claim 1, wherein the fourth antenna element is a half-wavelength patch antenna or the fourth antenna element is a planar inverted-F antenna for quarter-wave mode radiation.
11. The ultra-wideband antenna array of claim 1, wherein a metal ground is disposed between adjacent two of the first, second, third and fourth antenna elements.
12. An electronic device, comprising: the ultra-wideband antenna array of any of claims 1-11.
13. The electronic device of claim 12, further comprising: a camera module;
under the condition that the opening directions of a first open slot of a first antenna unit, a second open slot of a second antenna unit and a third open slot of a third antenna unit of the ultra-wideband antenna array are the same, the opening directions are opposite to the side where the camera module is located.
14. The electronic device of claim 12, further comprising: the device comprises a shell and a main board arranged in the shell;
the main board is provided with an antenna chip, and the ultra-wideband antenna array is electrically connected with the antenna chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210347400.4A CN114583446A (en) | 2022-04-01 | 2022-04-01 | Ultra-bandwidth antenna array and electronic equipment |
| PCT/CN2023/085196 WO2023186032A1 (en) | 2022-04-01 | 2023-03-30 | Ultra-bandwidth antenna array and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210347400.4A CN114583446A (en) | 2022-04-01 | 2022-04-01 | Ultra-bandwidth antenna array and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
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| CN114583446A true CN114583446A (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210347400.4A Pending CN114583446A (en) | 2022-04-01 | 2022-04-01 | Ultra-bandwidth antenna array and electronic equipment |
Country Status (2)
| Country | Link |
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| CN (1) | CN114583446A (en) |
| WO (1) | WO2023186032A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116156626A (en) * | 2023-04-24 | 2023-05-23 | 深圳市飞睿智能有限公司 | Four-antenna system and positioning method |
| WO2023186032A1 (en) * | 2022-04-01 | 2023-10-05 | 维沃移动通信有限公司 | Ultra-bandwidth antenna array and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3460905B8 (en) * | 2017-09-21 | 2022-06-22 | Nokia Shanghai Bell Co., Ltd. | Multiple band antenna |
| US11095017B2 (en) * | 2018-07-13 | 2021-08-17 | Apple Inc. | Electronic device having angle of arrival detection capabilities |
| CN209266580U (en) * | 2018-11-29 | 2019-08-16 | 清研讯科（北京）科技有限公司 | Antenna assembly and electronic equipment |
| WO2021049679A1 (en) * | 2019-09-10 | 2021-03-18 | 엘지전자 주식회사 | Electronic device having antenna |
| US11853016B2 (en) * | 2019-09-26 | 2023-12-26 | Apple Inc. | Electronic device wide band antennas |
| US11239550B2 (en) * | 2020-04-15 | 2022-02-01 | Apple Inc. | Electronic devices having compact ultra-wideband antennas |
| CN113131186B (en) * | 2021-03-26 | 2022-08-19 | 联想(北京)有限公司 | Ultra-wideband antenna, electronic equipment and signal receiving method |
| CN113178697B (en) * | 2021-04-09 | 2023-11-10 | 维沃移动通信有限公司 | Circuit board and electronic equipment |
| CN113991299A (en) * | 2021-11-30 | 2022-01-28 | 维沃移动通信有限公司 | Antenna assembly and electronic equipment |
| CN114188707B (en) * | 2022-02-17 | 2022-10-25 | 荣耀终端有限公司 | Terminal antenna and method for controlling antenna beam direction |
| CN114583446A (en) * | 2022-04-01 | 2022-06-03 | 维沃移动通信有限公司 | Ultra-bandwidth antenna array and electronic equipment |
-
2022
- 2022-04-01 CN CN202210347400.4A patent/CN114583446A/en active Pending
-
2023
- 2023-03-30 WO PCT/CN2023/085196 patent/WO2023186032A1/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023186032A1 (en) * | 2022-04-01 | 2023-10-05 | 维沃移动通信有限公司 | Ultra-bandwidth antenna array and electronic device |
| CN116156626A (en) * | 2023-04-24 | 2023-05-23 | 深圳市飞睿智能有限公司 | Four-antenna system and positioning method |
| CN116156626B (en) * | 2023-04-24 | 2023-06-27 | 深圳市飞睿智能有限公司 | Four-antenna system and positioning method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023186032A1 (en) | 2023-10-05 |
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