Antenna and communication equipment

Abstract

The embodiment of the invention discloses an antenna and communication equipment. The antenna comprises a substrate, a radiation layer, a grounding layer and a feed assembly, the substrate is provided with a first surface and a second surface which are oppositely arranged; the radiation layer comprises a plurality of radiation units, and the plurality of radiation units are arranged on the first surface in an array; the grounding layer is provided with a second surface, the grounding layer is provided with a first defect ground groove, the first defect ground groove divides the grounding layer into a first grounding part and a second grounding part, in the first direction, the projection of one half of the radiation units corresponds to the projection of the first grounding part, and the projection of the other half of the radiation units corresponds to the projection of the second grounding part; the feed assembly comprises a plurality of feed units, the plurality of feed units are arranged on the substrate, one end of one feed unit is connected with one radiation unit, and the other end of one feed unit is connected with the first grounding part or the second grounding part. The embodiment of the invention has the ultra-wideband characteristic, can reduce the volume, is used for three-dimensional positioning, and can be used in application occasions with limited space.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of antenna technology, and in particular to an antenna and a communication device. Background Art

[0002] Ultra-wideband antennas are antennas that can effectively radiate and receive signals over a wide frequency range. Ultra-wideband antennas are widely used in automotive, IoT, smart home, smart security and other fields due to their wide bandwidth, low power consumption, strong anti-interference ability and precise positioning.

[0003] At present, the commonly used positioning method for ultra-wideband antennas is three-dimensional positioning, which usually requires three or more ultra-wideband antennas to undergo 3D-AOA / 3D-TDOA and other tests to meet the requirements and achieve three-dimensional positioning. However, in three-dimensional positioning, the overall volume of three or more ultra-wideband antennas is too large to meet the needs of applications with limited space (such as digital keys, security door locks, etc.). Summary of the invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide an antenna and a communication device with ultra-wideband characteristics, which can be reduced in size and used for three-dimensional positioning to meet the needs of application scenarios with limited space.

[0005] To solve the above technical problems, a technical solution adopted in an embodiment of the present invention is: to provide an antenna, characterized in that it includes a substrate, a radiating layer, a grounding layer and a feeding assembly; the substrate is provided with a first surface and a second surface arranged opposite to each other; the radiating layer includes a plurality of radiating units, and the plurality of radiating units are arranged in an array on the first surface; the grounding layer is provided with the second surface, and the grounding layer is provided with a first defective ground groove, the first defective ground groove separates the grounding layer to form a first grounding part and a second grounding part, the first grounding part and the second grounding part are located on both sides of the first defective ground groove and are arranged opposite to each other, along a first direction, the projection of half of the radiating units corresponds to the projection of the first grounding part, and the projection of the other half of the radiating units corresponds to the projection of the second grounding part, and the first direction is the direction from the radiating layer to the grounding layer; the feeding assembly includes a plurality of feeding units, the plurality of feeding units are arranged on the substrate, one end of one of the feeding units is connected to one of the radiating units, and the other end of one of the feeding units is connected to the first grounding part or the second grounding part.

[0006] In some embodiments, the number of the radiation units and the feeding units are both four; the four radiation units are arranged in an array on the first surface, and along the first direction, the projections of two of the radiation units overlap with the projection of the first grounding part, and the projections of the other two radiation units overlap with the projection of the second grounding part; the four feeding units are arranged on the substrate, one end of two of the feeding units are respectively connected to the two radiation units, and the other ends of the two feeding units are connected to the first grounding part, one end of the other two feeding units are respectively connected to the other two radiation units, and the other ends of the other two feeding units are connected to the second grounding part.

[0007] In some embodiments, the distance between any two adjacent radiation units is less than half of the antenna wavelength.

[0008] In some embodiments, the radiation unit includes a first radiator and a second radiator, the first radiator and the second radiator are cross-arranged, and the first radiator and the second radiator are integrally formed.

[0009] In some embodiments, the first grounding portion is provided with a second defective ground groove, the second grounding portion is provided with a third defective ground groove, and the second defective ground groove and the third defective ground groove are respectively arranged opposite to each other on both sides of the first defective ground groove.

[0010] In some embodiments, along the second direction, the second defective groove and the third defective groove are both perpendicular to the side of the substrate, and the second direction is perpendicular to the first direction; along the third direction, the second defective groove and the third defective groove are both parallel to the side of the substrate, and the third direction is perpendicular to the second direction, and the third direction and the second direction are both parallel to the first surface or the second surface.

[0011] In some embodiments, the area of ​​the first defective groove is greater than the area of ​​the second defective groove or the area of ​​the third defective groove.

[0012] In some embodiments, the substrate is provided with a through hole; the feeding unit includes a feeding tube, a first feeding part and a second feeding part, the first feeding part is embedded in the radiation unit, the second feeding part is embedded in the first grounding part or the second grounding part, the feeding tube is inserted into the through hole, and the two ends of the feeding tube are respectively in contact and conductive with the first feeding part and the second feeding part.

[0013] In order to solve the above technical problem, another technical solution adopted by the embodiment of the present invention is: providing a communication device, including the above antenna.

[0014] The beneficial effects of the embodiments of the present invention are as follows: Different from the prior art, the embodiments of the present invention provide an antenna, including a substrate, a radiation layer, a ground layer and a feeding assembly; the substrate is provided with a first surface and a second surface arranged oppositely; the radiation layer includes a plurality of radiation units, and the plurality of radiation units are arranged in an array on the first surface; the ground layer is provided with a second surface, and the ground layer is provided with a first defective ground groove, the first defective ground groove separates the ground layer to form a first ground part and a second ground part, the first ground part and the second ground part are arranged oppositely on both sides of the first defective ground groove, along the first direction, the projection of half of the radiation units corresponds to the projection of the first ground part, and the projection of the other half of the radiation units corresponds to the projection of the second ground part, and the first direction is the direction from the radiation layer to the ground layer; the feeding assembly includes a plurality of feeding units, the plurality of feeding units are arranged on the substrate, one end of a feeding unit is connected to a radiation unit, and the other end of a feeding unit is connected to the first ground part or the second ground part. Compared with the antenna with one radiation unit, through the above method, the antenna of the embodiment of the present invention has a plurality of radiation units, has ultra-wideband characteristics, can reduce the volume, is used for three-dimensional positioning, and meets the use of applications with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1 The overall structure of the antenna provided by the embodiment of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 2 The overall structure of the antenna provided by the embodiment of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 3 is a partial structural schematic diagram of an antenna provided by an embodiment of the present invention;

[0019] Figure 4 is a diagram of S11 parameter results of a simulation example of an antenna provided in an embodiment of the present invention;

[0020] Figure 5 is a diagram of S21 parameter results of a simulation example of an antenna provided in an embodiment of the present invention;

[0021] Figure 6 is a directional diagram of a simulation example of an antenna provided in an embodiment of the present invention when Ph i is 0 degrees;

[0022] Figure 7is a directional diagram of a simulation example of an antenna provided in an embodiment of the present invention when Ph i is 90 degrees;

[0023] Figure 8 is a horizontal phase difference diagram of a simulation example of an antenna provided by an embodiment of the present invention;

[0024] Fig. 9 It is a vertical phase difference diagram of a simulation example of the antenna provided in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1 substrate, 11 first surface, 12 second surface;

[0027] 2 radiation layer, 21 radiation unit, 211 first radiator, 2111 first grounding point, 212 second radiator, 2121 second grounding point;

[0028] 3 ground layer, 31 first defective ground groove, 32 first ground portion, 321 second defective ground groove, 33 second ground portion, 331 third defective ground groove;

[0029] 41 a first power feeder, 42 a second power feeder;

[0030] 100 antennas;

[0031] Y is the second direction, Z is the third direction. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0034] Ultra-wideband antennas are antennas that can effectively radiate and receive signals over a wide frequency range. Ultra-wideband antennas are widely used in automotive, IoT, smart home, smart security and other fields due to their wide bandwidth, low power consumption, strong anti-interference ability and precise positioning.

[0035] At present, the commonly used positioning method for ultra-wideband antennas is three-dimensional positioning, which usually requires three or more ultra-wideband antennas to perform 3D-AOA (three-dimensional angle of arrival) / 3D-TDOA (three-dimensional time difference of arrival) and other tests to meet the requirements and achieve three-dimensional positioning. However, in three-dimensional positioning, the overall volume of three or more ultra-wideband antennas is too large to meet the needs of applications with limited space (such as digital keys, security door locks, etc.).

[0036] In view of this, the present invention provides an embodiment of an antenna 100 having multiple radiation units 21, which can have ultra-wideband characteristics, can reduce the volume, and is used for three-dimensional positioning to meet the use of application occasions with limited space.

[0037] For the above antenna 100, see Figures 1 to 3 The antenna 100 includes a substrate 1, a radiation layer 2, a ground layer 3 and a feeding assembly (not shown); the substrate 1 is provided with a first surface 11 and a second surface 12 arranged opposite to each other; the radiation layer 2 includes a plurality of radiation units 21, and the plurality of radiation units 21 are arranged in an array on the first surface 11; the ground layer 3 is provided with a second surface 12, and the ground layer 3 is provided with a first defective ground groove 31, and the first defective ground groove 31 separates the ground layer 3 into a first grounding portion 32 and a second grounding portion 33, and the first grounding portion 32 and the second grounding portion 33 are located at the first defective ground groove 31. The two sides of the ground groove 31 are arranged opposite to each other. Along the first direction (not shown in the figure), the projection of half of the radiation unit 21 corresponds to the projection of the first grounding part 32, and the projection of the other half of the radiation unit 21 corresponds to the projection of the second grounding part 33. The first direction (not shown in the figure) is the direction from the radiation layer 2 to the grounding layer 3; the feeding assembly (not shown in the figure) includes a plurality of feeding units (not shown in the figure), and the plurality of feeding units are arranged on the substrate 1. One end of a feeding unit is connected to a radiation unit 21, and the other end of a feeding unit is connected to the first grounding part 32 or the second grounding part 33.

[0038] Specifically, the substrate 1 is a double-sided copper-clad plate, the substrate 1 has four side edges connected end to end, one side of the four side edges of the substrate 1 is connected to the first surface 11, and the other side of the four side edges of the substrate 1 is connected to the second surface 12, the number of the radiation units 21 and the feeding units are four; the four radiation units 21 are arranged in an array on the first surface 11, along the first direction, the projections of two radiation units 21 overlap with the projections of the first grounding part 32, and the projections of the other two radiation units 21 overlap with the projections of the second grounding part 33; the four feeding units are arranged on the substrate 1, one end of the two feeding units is respectively connected to the two radiation units 21, and the other ends of the two feeding units are both connected to the first grounding part 32, one end of the other two feeding units is respectively connected to the other two radiation units 21, and the other ends of the other two feeding units are both connected to the second grounding part 33, and the spacing between any two adjacent radiation units 21 is less than half of the wavelength of the antenna 100.

[0039] To facilitate the understanding of the reader, the arrangement examples of the above four radiation units are as follows: in some embodiments, along the second direction Y, the line between any two adjacent radiation units 21 is parallel to a side edge of the substrate 1, and the distance between the two is less than half of the wavelength of the antenna 100, and the second direction Y is perpendicular to the first direction; along the third direction Z, the line between any two adjacent radiation units 21 is parallel to a side edge of the substrate 1, and the distance between the two is less than half of the wavelength of the antenna 100, the third direction Z is perpendicular to the second direction Y, and the third direction Z and the second direction Y are both parallel to the first surface 11 or the second surface 12. It can be understood that in some other embodiments, it is not necessary to limit the line between any two adjacent radiation units 21 along the second direction Y or the third direction Z to be parallel to a side edge of the substrate 1, and it is only necessary to satisfy that the distance between any two adjacent radiation units 21 is less than half of the wavelength of the antenna 100.

[0040] In the above manner, the four radiating units 21 can simultaneously realize the 1T3R (one transmitting antenna 100 and three receiving antennas 100) system architecture and the 2T2R (two transmitting antennas 100 and two receiving antennas 100) system architecture, thereby improving the flexibility of the transmitted signal, the flexibility of the received signal, the stability of the received signal and the accuracy of spatial positioning, thereby helping to achieve the three-dimensional positioning of the antenna 100. Compared with the same type of antennas, the antenna 100 can have the same test effect while using a smaller size, meeting the use of applications with limited space.

[0041] For the above radiation layer 2, see Figures 1 to 3 The radiation unit 21 includes a first radiator 211 and a second radiator 212 . The first radiator 211 and the second radiator 212 are cross-arranged and are integrally formed.

[0042] Specifically, the first radiator 211 and the second radiator 212 are both rectangular, the areas of the first radiator 211 and the second radiator 212 are equal, and the first radiator 211 and the second radiator 212 are cross-shaped. It should be noted that the cross-setting of the first radiator 211 and the second radiator 212 includes but is not limited to: the first radiator 211 and the second radiator 212 are vertically set, or the first radiator 211 and the second radiator 212 are set at a preset angle, and the cross angle of the first radiator 211 and the second radiator 212 can be set according to actual needs. It should also be noted that by changing the size of the first radiator 211 and the second radiator 212, the resonant frequency range of the antenna 100 can be changed.

[0043] In the above manner, the first radiator 211 and the second radiator 212 are cross-shaped to achieve dual-polarization characteristics, so that the antenna 100 can send and receive signals in different planned directions, thereby improving the diversity, anti-interference ability, signal coverage, impedance matching and resonant frequency of the antenna 100, and helping to improve the coverage effect of the three-dimensional positioning of the antenna 100. In addition, according to the cross-arrangement of the first radiator 211 and the second radiator 212, the antenna 100 can send and receive signals in the polarization direction of the cross angle. For example, when the first radiator 211 and the second radiator 212 are vertically arranged, the first radiator 211 and the second radiator 212 can send and receive signals in the polarization directions of +45° and -45°.

[0044] For the above-mentioned radiation unit 21, see Figures 1 to 3 The first radiator 211 is provided with a first grounding point 2111, and the second radiator 212 is provided with a second grounding point 2121. The first grounding point 2111 and the second grounding point 2121 are arranged opposite to each other.

[0045] Specifically, the first grounding point 2111 is a partial metal area on the first radiator 211, and the second grounding point 2121 is a partial metal area on the second radiator 212. The substrate 1 is provided with a first metal via and a second metal via. One end of the first metal via is in contact and conduction with the first grounding point 2111, and the other end of the first metal via is in contact and conduction with the first grounding part 32 or the second grounding part 33. One end of the second metal via is in contact and conduction with the second grounding point 2121, and the other end of the second metal via is in contact and conduction with the first grounding part 32 or the second grounding part 33.

[0046] Through the above method, the first radiator 211 forms a return path through the first grounding point 2111, the first metal via and the first grounding part 32 or the second grounding part 33 to achieve grounding; the second radiator 212 forms a return path through the second grounding point 2121, the second metal via and the first grounding part 32 or the second grounding part 33 to achieve grounding, thereby achieving the grounding of the radiation unit 21.

[0047] For the above ground plane 3, see Figures 1 to 3 The first grounding portion 32 is provided with a second defective ground groove 321 , and the second grounding portion 33 is provided with a third defective ground groove 331 . The second defective ground groove 321 and the third defective ground groove 331 are respectively arranged on both sides of the first defective ground groove 31 .

[0048] Specifically, the first grounding portion 32 is a rectangular metal layer, the first grounding portion 32 has four edges connected end to end, one edge is connected to the first defective ground groove 31, and the other three edges are respectively flush with the side edges of the substrate 1, and the second defective ground groove 321 is a rectangular hollowed-out area of ​​the first grounding portion 32; the second grounding portion 33 is a rectangular metal layer, the second grounding portion 33 has four edges connected end to end, one edge is connected to the first defective ground groove 31, and the other three edges are respectively flush with the side edges of the substrate 1, and the third defective ground groove 331 is a rectangular hollowed-out area of ​​the second grounding portion 33.

[0049] In the above manner, the second defective ground groove 321 and the third defective ground groove 331 can change the distribution of electromagnetic waves in the ground layer 3, and then adjust the electromagnetic characteristics of the ground layer 3, so as to improve the consistency of the radiation direction of the antenna 100.

[0050] For the first grounding portion 32 and the second grounding portion 33, see Figures 1 to 3 , the area of ​​the first defective groove 31 is greater than the area of ​​the second defective groove 321 or the area of ​​the third defective groove 331.

[0051] Through the above method, setting the first defective groove 31, the second defective groove 321 and the third defective groove 331 of different areas is helpful to optimize the directivity, isolation, multi-path effect suppression and multi-band characteristics of the antenna 100, thereby improving the coverage effect of the three-dimensional positioning of the antenna 100, so that the antenna 100 can better meet the use of applications with limited space.

[0052] For the first grounding portion 32 and the second grounding portion 33, see Figures 1 to 3Along the second direction Y, the second defective groove 321 and the third defective groove 331 are both perpendicular to the side of the substrate 1, the second direction Y is perpendicular to the first direction, along the third direction Z, the second defective groove 321 and the third defective groove 331 are both parallel to the side of the substrate 1, the third direction Z is perpendicular to the second direction Y, and the third direction Z and the second direction Y are both parallel to the first surface 11 or the second surface 12.

[0053] For the above feed components, see Figures 1 to 3 The feeding unit (not shown) includes a feeding tube (not shown), a first feeding part 41 and a second feeding part 42. The substrate 1 is provided with a through hole (not shown). The first feeding part 41 is embedded in the radiation unit 21, and the second feeding part 42 is embedded in the first grounding part 32 or the second grounding part 33. The feeding tube is inserted into the through hole, and the two ends of the feeding tube are respectively in contact and conductive with the first feeding part 41 and the second feeding part 42.

[0054] Specifically, the feeding tube is a metal tube embedded in the through hole of the substrate 1, or the feeding tube is a metal via formed integrally with the substrate 1, and the first feeding portion 41 is a partial metal area of ​​the radiation unit 21, for example, the first feeding portion 41 is a partial metal area at the intersection of the first radiator 211 and the second radiator 212, and the second grounding point 2121 is a partial metal area of ​​the first grounding portion 32 or the second grounding portion 33.

[0055] Through the above method, effective transmission of electrical signals can be achieved.

[0056] In order to verify the concept of the antenna 100 of the embodiment of the present invention, a physical simulation and a simulation example of a computational electromagnetic field software were performed based on the structure of the antenna 100, as follows:

[0057] A double-layer circuit board is used as substrate 1, made of epoxy resin glass fiber composite material, copper-clad on both sides, with a dielectric constant of 4.3, a dielectric loss of 0.024, and an overall size of 29mm*12mm*2mm. The specific simulation results are as follows:

[0058] See also Figure 4 , Figure 4 The simulation result diagram of the S parameter of the simulation example of the antenna 100 is shown, specifically, the S11 parameter diagram when the four radiation units 21 work in the CH9 frequency band (7.75 GHz-8.25 GHz). Figure 4 It can be seen that the S11 of the four radiation units 21 in the 7.75GHz-8.25GHz frequency band is less than -10dB, indicating that the four radiation units 21 maintain good transmission performance in a wider frequency band. Therefore, the S11 of the four radiation units 21 in the 7.75GHz-8.25GHz frequency band meets the requirements and has the characteristics of the ultra-wideband antenna 100.

[0059] See also Figure 5 , Figure 5 The simulation result diagram of the S parameter of the simulation example of the antenna 100 is shown, specifically, an S21 parameter curve diagram when any one of the radiation units 21 is a transmitting antenna 100 and the other three radiation units 21 are receiving antennas 100 working in the CH9 frequency band (7.75GHz-8.25GHz). Figure 5 It can be seen that the S21 in the 7.75GHz-8.25GHz frequency band is less than -10dB, indicating that the isolation between the four radiation units 21 is good. Therefore, the S21 of the antenna 100 in the 7.75GHz-8.25GHz frequency band meets the requirements, which helps to achieve more accurate positioning.

[0060] See also Figure 6 , Figure 6 The directional pattern of the simulation example of the antenna 100 in the radiation direction with Phi (azimuth) of 0 degrees is shown, specifically, the directional pattern of the four radiation units 21 in the actual test in the radiation direction with Phi of 0 degrees. Figure 6 It can be seen that the gains of the four radiation units 21 at different radiation angles when working in the 7.75 GHz-8.25 GHz frequency band indicate that the four radiation units 21 have good pre-radiation amplitude in the radiation direction with Phi of 0 degrees, which helps to improve the positioning accuracy.

[0061] See also Figure 7 , Figure 7 The directional pattern of the simulation example of the antenna 100 in the radiation direction with Phi (azimuth) of 90 degrees is shown, specifically, the directional pattern of the four radiation units 21 in the actual test in the radiation direction with Phi of 90 degrees. Figure 7 It can be seen that the gains of the four radiation units 21 at different radiation angles when working in the 7.75 GHz-8.25 GHz frequency band indicate that the four radiation units 21 have good radiation amplitude in the radiation direction with Phi of 90 degrees, which helps to improve the positioning accuracy.

[0062] See also Figure 8 , Figure 8 A horizontal phase difference diagram of a simulation example of the antenna 100 is shown, specifically, a phase difference diagram of two antennas 100 actually tested in the horizontal direction. Figure 8 It can be seen that the horizontal phase difference between the two antennas 100 in the range of ±60° changes monotonically with the angle, which meets the positioning requirements.

[0063] See also Fig. 9 , Fig. 9 A vertical phase difference diagram of a simulation example of the antenna 100 is shown, specifically, a phase difference diagram of two antennas 100 actually tested in the vertical direction. Fig. 9It can be seen that the vertical phase difference between the two antennas 100 in the range of ±60° changes monotonically with the angle, which meets the positioning requirements.

[0064] In summary, Figures 4 to 9 It can be seen that the structure of the antenna 100 has an ultra-wideband characteristic, which can meet the requirements of applications with limited space.

[0065] An embodiment of the present invention provides an antenna 100, comprising a substrate 1, a radiation layer 2, a ground layer 3 and a feeding assembly; the substrate 1 is provided with a first surface 11 and a second surface 12 which are arranged opposite to each other; the radiation layer 2 includes a plurality of radiation units 21, and the plurality of radiation units 21 are arranged in an array on the first surface 11; the ground layer 3 is provided with a second surface 12, and the ground layer 3 is provided with a first defective ground groove 31, the first defective ground groove 31 separates the ground layer 3 into a first grounding portion 32 and a second grounding portion 33, the first grounding portion 32 and the second grounding portion 33 are located on both sides of the first defective ground groove 31 and are arranged opposite to each other, along a first direction, the projection of half of the radiation units 21 corresponds to the projection of the first grounding portion 32, and the projection of the other half of the radiation units 21 corresponds to the projection of the second grounding portion 33, and the first direction is the direction from the radiation layer 2 to the ground layer 3; the feeding assembly includes a plurality of feeding units, and the plurality of feeding units are arranged on the substrate 1, one end of a feeding unit is connected to a radiation unit 21, and the other end of a feeding unit is connected to the first grounding portion 32 or the second grounding portion 33. Compared with the antenna 100 having one radiation unit 21, through the above method, the antenna 100 of the embodiment of the present invention has multiple radiation units 21, has ultra-wideband characteristics, can reduce the volume, is used for three-dimensional positioning, and meets the use of application occasions with limited space.

[0066] The present invention further provides an embodiment of a communication device, the communication device includes the above-mentioned antenna 100. The specific structure and function of the above-mentioned antenna 100 can be referred to the above-mentioned embodiment, which will not be described in detail here.

[0067] For the above-mentioned communication equipment, it can be understood that the communication equipment includes electronic products that apply wireless communication technology, such as: digital keys, security door locks, etc.

[0068] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An antenna, characterized in that: include: A substrate having a first surface and a second surface opposite to each other; A radiation layer, comprising a plurality of radiation units, wherein the plurality of radiation units are arranged in an array on the first surface; A grounding layer, wherein the second surface is provided, and the grounding layer is provided with a first defective ground groove, wherein the first defective ground groove separates the grounding layer into a first grounding portion and a second grounding portion, wherein the first grounding portion and the second grounding portion are located on both sides of the first defective ground groove and are arranged opposite to each other, wherein along a first direction, projections of half of the radiation units correspond to projections of the first grounding portion, and projections of the other half of the radiation units correspond to projections of the second grounding portion, and the first direction is a direction from the radiation layer to the grounding layer; The feeding assembly comprises a plurality of feeding units, wherein the plurality of feeding units are arranged on the substrate, one end of a feeding unit is connected to a radiation unit, and the other end of a feeding unit is connected to the first grounding part or the second grounding part.

2. The antenna according to claim 1, characterized in that The number of the radiation units and the number of the feeding units are both four; The four radiation units are arranged in an array on the first surface, and along the first direction, the projections of two of the radiation units overlap with the projections of the first ground portion, and the projections of the other two radiation units overlap with the projections of the second ground portion; The four feed units are arranged on the substrate, one end of two of the feed units are respectively connected to the two radiating units, and the other ends of the two feed units are connected to the first grounding part, one end of the other two feed units are respectively connected to the other two radiating units, and the other ends of the other two feed units are connected to the second grounding part.

3. The antenna according to claim 2, characterized in that: The distance between any two adjacent radiation units is less than half of the antenna wavelength.

4. The antenna according to claim 3, characterized in that: The radiation unit includes a first radiator and a second radiator. The first radiator and the second radiator are arranged crosswise, and the first radiator and the second radiator are integrally formed.

5. The antenna according to claim 2, characterized in that: The first grounding portion is provided with a second defective ground groove, and the second grounding portion is provided with a third defective ground groove. The second defective ground groove and the third defective ground groove are respectively arranged opposite to each other on both sides of the first defective ground groove.

6. The antenna according to claim 5, characterized in that Along a second direction, the second defective groove and the third defective groove are both perpendicular to the side of the substrate, and the second direction is perpendicular to the first direction; Along the third direction, the second defective ground groove and the third defective ground groove are both parallel to the side of the substrate, the third direction is perpendicular to the second direction, and the third direction and the second direction are both parallel to the first surface or the second surface.

7. The antenna according to claim 6, characterized in that The area of ​​the first defective groove is greater than the area of ​​the second defective groove or the area of ​​the third defective groove.

8. The antenna according to claim 1, characterized in that: The substrate is provided with a through hole; The feeding unit includes a feeding tube, a first feeding part and a second feeding part, the first feeding part is embedded in the radiation unit, the second feeding part is embedded in the first grounding part or the second grounding part, the feeding tube is inserted into the through hole, and the two ends of the feeding tube are respectively in contact and conductive with the first feeding part and the second feeding part.

9. A communication device, characterized in that: Comprising the antenna according to any one of claims 1-8.

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