Antenna unit and communication equipment

Abstract

The embodiment of the invention relates to the technical field of antennas, and discloses an antenna unit and communication equipment, and the antenna unit comprises a first metal layer, a first substrate, a second metal layer, a second substrate, a third metal layer, a third substrate, a fourth metal layer, a fourth substrate and a fifth metal layer which are sequentially stacked from top to bottom. Through the above mode, the embodiment of the invention can realize more accurate impedance matching and phase control of the antenna unit, so that the antenna unit can effectively suppress coupling between different polarization components, thereby realizing a wide axial ratio bandwidth.

Description

Technical Field

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

[0002] A dual circularly polarized antenna is an antenna that can simultaneously transmit and receive two mutually orthogonal circularly polarized waves. Compared with traditional linearly polarized antennas, it has the advantages of small size, light weight, easy manufacturing, and can effectively improve problems such as multipath distortion and polarization mismatch.

[0003] In the process of implementing the embodiments of the present application, the inventors discovered that: at present, there is a mutual coupling effect between the radiating units in the dual circularly polarized antenna, that is, the electromagnetic changes of one radiating unit will affect the electromagnetic distribution of another radiating unit. The mutual coupling effect will cause the polarization direction of the antenna to shift, resulting in a worse axial ratio, thereby limiting the axial ratio bandwidth. Summary of the invention

[0004] The main technical problem solved by the embodiments of the present application is to provide an antenna unit that can achieve a wide axial ratio bandwidth.

[0005] In order to solve the above technical problems, a technical solution adopted in an embodiment of the present application is: to provide an antenna unit, including a first metal layer, a first substrate, a second metal layer, a second substrate, a third metal layer, a third substrate, a fourth metal layer, a fourth substrate and a fifth metal layer stacked in sequence from top to bottom, the first metal layer including a first radiation patch, a second radiation patch, and a first metal grounding component, a first feeding point is arranged on the first microstrip line, the first radiation patch and the second radiation patch are symmetrically arranged in a first direction with respect to the first microstrip line, and a second metal grounding component and a first feeding hole component are arranged on the first substrate; the second metal layer includes a third radiation patch, a fourth radiation patch, a second microstrip line and a third metal grounding component, a second microstrip line has a second feeding point, the third radiation patch and the fourth radiation patch are symmetrically arranged in a second direction with respect to the second microstrip line; the second substrate is provided with a first Four metal grounding components and a second feeding hole component, the fourth metal grounding component is symmetrical about the center point of the projection of the first microstrip line and the second microstrip line on the second substrate; the third metal layer has a fifth metal grounding component, the fifth metal grounding hole component is symmetrical about the center point of the projection of the first microstrip line and the second microstrip line on the third metal layer; the third substrate is provided with a sixth metal grounding component; a fourth metal layer, the fourth metal layer is connected with the third metal layer, the third substrate, the fourth substrate and the fifth metal layer to respectively form a first antenna and a second antenna; a fourth substrate, the fourth substrate is provided with a seventh metal grounding component; the three metal columns are grounding holes, the two metal columns are the third feeding hole and the fourth feeding hole; the first metal layer, the first substrate, the second metal layer, the second substrate, the third metal layer, the third substrate, the fourth metal layer, the fourth substrate and the fifth metal layer are stacked in sequence from top to bottom.

[0006] Optionally, the fourth metal layer is provided with a third feeding point, a fourth feeding point, a fifth feeding point, and a sixth feeding point; the fifth feeding point and the sixth feeding point are respectively connected to an external signal source through the third feeding hole and the fourth feeding hole; the third feeding point and the fourth feeding point are respectively connected to the first feeding point and the second feeding point through the first feeding hole and the second feeding hole, and transmit the signal to the first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch.

[0007] Optionally, the third metal layer, the fourth metal layer, and the fifth metal layer are electrically connected through the fifth metal grounding component, the sixth metal grounding component, and the seventh metal grounding component, respectively.

[0008] Optionally, the first radiation patch includes a first rectangular radiator and a first trapezoidal radiator, the second radiation patch includes a second rectangular radiator and a second trapezoidal radiator, the first microstrip line includes a first feeder and a first circular feeding patch, the first rectangular radiator is connected to the first trapezoidal radiator, the second rectangular radiator is connected to the second trapezoidal radiator, one end of the first feeder is connected to the first circular feeding patch, and the first trapezoidal radiator and the second trapezoidal radiator are symmetrically arranged in a first direction about the first feeder.

[0009] Optionally, the first metal grounding component includes a first grounding hole, a second grounding hole, a third grounding hole and a fourth grounding hole, the first grounding hole and the second grounding hole are arranged on the first radiation patch, the third grounding hole and the fourth grounding hole are arranged on the second radiation patch, and the first grounding hole and the third grounding hole are symmetrically arranged in the first direction with respect to the first microstrip line, and the second grounding hole and the fourth grounding hole are symmetrically arranged in the first direction with respect to the first microstrip line.

[0010] Optionally, the third radiation patch includes a third rectangular radiator and a third trapezoidal radiator, the fourth radiation patch includes a fourth rectangular radiator and a fourth trapezoidal radiator, the second microstrip line includes a second feeder and a second circular feed patch, the third rectangular radiator and the third trapezoidal radiator are connected, the fourth rectangular radiator and the fourth trapezoidal radiator are connected, one end of the second feeder is connected to the second circular feed patch, and the third trapezoidal radiator and the fourth trapezoidal radiator are symmetrically arranged in the second direction about the second feeder.

[0011] Optionally, the third metal grounding component includes a sixth grounding hole, a seventh grounding hole, an eighth grounding hole and a ninth grounding hole, the sixth grounding hole and the seventh grounding hole are arranged on the third radiation patch, the eighth grounding hole and the ninth grounding hole are arranged on the fourth radiation patch, and the eighth grounding hole and the ninth grounding hole are arranged symmetrically about the second microstrip line in the second direction, and the eighth grounding hole and the ninth grounding hole are arranged symmetrically about the second microstrip line in the second direction.

[0012] Optionally, the first feeding hole component is symmetrically arranged in a second direction with respect to the second microstrip line.

[0013] Optionally, the first microstrip line and the second microstrip line have the same shape and size.

[0014] In order to solve the above technical problems, another technical solution adopted in the embodiment of the present application is: providing a communication device, comprising any one of the above antenna units.

[0015] The embodiment of the present application provides an antenna unit, including a first metal layer, a first substrate, a second metal layer, a second substrate, a third metal layer, a third substrate, a fourth metal layer, a fourth substrate and a fifth metal layer stacked in sequence from top to bottom. Through the above method, more accurate impedance matching and axial ratio control of the antenna unit can be achieved, and by setting a feeding network layer with equal broadband amplitude and a phase difference of 90°, and setting a plurality of symmetrical metal grounding hole components on the metal layer and the substrate, the antenna can achieve a wide impedance bandwidth and a wide axial ratio bandwidth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to 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, the elements or parts are not necessarily drawn according to the actual scale.

[0017] Figure 1 is an exploded view of the antenna unit of an embodiment of the present application;

[0018] Figure 2 It is a partial structural schematic diagram of the antenna unit of an embodiment of the present application;

[0019] Figure 3 It is another structural schematic diagram of a part of the antenna unit of the embodiment of the present application;

[0020] Figure 4 It is a schematic diagram of another part of the structure of the antenna unit of the embodiment of the present application;

[0021] Figure 5 is another partial structural schematic diagram of the antenna unit according to the embodiment of the present application;

[0022] Figure 6 is a simulation result diagram of the reflection coefficient of the antenna unit of the embodiment of the present application;

[0023] Figure 7 is a simulation result diagram of the axial ratio of the antenna unit of the embodiment of the present application;

[0024] Figure 8 is the simulation result of the maximum gain of the antenna unit in the embodiment of the present application;

[0025] Fig. 9 It is a simulation result diagram of the radiation efficiency of the antenna unit of the embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the present application 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 application 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 to the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] 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 to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0028] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0029] See also Figure 1 , Figure 2 and Figure 3The antenna unit 100 includes: a first substrate 10, a first metal layer 20, a second metal layer 30, a second substrate 40, a third metal layer 50, a third substrate 60, a fourth metal layer 70, a fourth substrate 80 and a fifth metal layer 90; the first metal layer 20 includes a first radiation patch 11, a second radiation patch 12, and a first metal grounding component 101, a first feeding point (not shown) is arranged on the first microstrip line 13, the first radiation patch 11 and the second radiation patch 12 are symmetrically arranged in a first direction with respect to the first microstrip line 13, and the first metal grounding component 101 is symmetrically arranged in a first direction with respect to the first microstrip line 13; the first substrate 1 0 is provided with a second metal grounding component 201 and a first feeding hole component (not shown in the figure), the second metal layer 30 includes a third radiation patch 31, a fourth radiation patch 32, a second microstrip line 33 and a third metal grounding component 301, the second microstrip line 33 has a second feeding point (not shown in the figure), the third radiation patch 31 and the fourth radiation patch 32 are symmetrically arranged in a second direction with respect to the second microstrip line 33, the second substrate 40 is provided with a fourth metal grounding component (not shown in the figure) and a second feeding hole component (not shown in the figure), the fourth metal grounding component is symmetrical with respect to the center point of the projection of the first microstrip line 13 and the second microstrip line 33 on the second substrate 40, the third metal There is a fifth metal grounding component (not shown) on the metal layer 50, and the fifth metal grounding hole component is symmetrical about the center point of the projection of the first microstrip line 13 and the second microstrip line 33 on the third metal layer 50. The fourth metal layer 70 is connected to the third metal layer 50, the third substrate 60, the fourth substrate 80, and the fifth metal layer 90 to respectively form a first antenna and a second antenna. The above arrangement helps to eliminate or reduce the resonant frequency caused by structural asymmetry, thereby achieving a wider bandwidth; the second metal grounding component 201 is symmetrically arranged in the second direction about the second microstrip line 33. The symmetrical structure can balance the current distribution, reduce reflection, improve the impedance matching of the antenna, and reduce the stationary phase. wave ratio; the second substrate 40 is provided with a fourth metal grounding component (not shown), wherein the first substrate 10, the first metal layer 20, the second metal layer 30, the second substrate 40, the third metal layer 50, the third substrate 60, the fourth metal layer 70, the fourth substrate 80 and the fifth metal layer 90 are stacked in sequence from top to bottom to form a broadband stripline 90° phase-shifted network, which can provide the first radiation patch 11 and the third radiation patch 31 with broadband signals with equal amplitudes and a phase difference of 90° to form a wide-axis ratio right-polarized antenna; or, the second radiation patch 12 and the fourth radiation patch 32 can provide broadband signals with equal amplitudes and a phase difference of 90° to form a wide-axis ratio left-polarized antenna;The above arrangement constitutes a wide-axis ratio dual circular polarization antenna, that is, the antenna unit 100, wherein the first metal layer 20 and the second metal layer 30 are used as radiation layers for transmitting and receiving electromagnetic wave signals; the first substrate 10 and the second substrate 40 are used as dielectric layers for isolating and supporting the metal layers and providing a certain dielectric constant, which affects the impedance matching and radiation characteristics of the antenna unit 100; the third metal layer 50 and the fifth metal layer 90 are used as metal strata for providing a reference plane, which affects the radiation pattern and impedance matching of the antenna unit 100; the fourth metal layer 70 is used to connect the feed port and the radiation layer to realize the transmission of the signal from the feed port to the radiation layer. Through the above arrangement, more accurate impedance matching and phase control are achieved, thereby realizing broadband characteristics. ;

[0030] See also Figure 2 In the embodiment of the present application, the fourth metal layer 70 is also provided with an output port 791, an input port 792, a first signal feeding point 171 and a second signal feeding point 172. The input port 792 is electrically connected to the first microstrip line 13 and the first signal feeding point 171, respectively, receives the signal of the first signal feeding point 171, and outputs the signal after a 90° phase shift; the output port 791 is electrically connected to the second microstrip line 33 and the second signal feeding point 172, respectively, receives the signal of the second signal feeding point 172, and outputs the signal after a 90° phase shift. Through the above arrangement, the broadband characteristics of the phase shift network are guaranteed, thereby achieving a wide axial ratio bandwidth.

[0031] The fourth metal layer 70 also includes a sixth metal grounding component (not shown), and the third substrate 60 also includes a seventh metal grounding component. The sixth metal opening component is connected to the fifth metal grounding hole component and the seventh metal grounding hole component respectively. The third substrate 60 is electrically connected to the fourth metal layer 70 through the seventh metal grounding hole component to achieve signal transmission.

[0032] In an embodiment of the present application, a first signal feeding point is arranged on the first microstrip line 12, the first substrate 10, the second substrate 40, the third substrate 60 and the fourth metal layer 70, indicating a transmission path of the signal from the fourth metal layer 70 to the first metal layer 20, and a second signal feeding point is arranged on the second microstrip line 33, the second substrate 40, the third substrate 60 and the fourth metal layer 70, indicating a transmission path of the signal from the fourth metal layer 70 to the second metal layer 30.

[0033] In the embodiment of the present application, the fourth metal layer 70 , the fourth substrate 80 and the fifth metal layer 90 are all provided with output ports and input ports, indicating a transmission path for signals to be transmitted from the output ports and the input ports to the fourth metal layer 70 .

[0034] See also Figure 3 and Figure 4 The first radiation patch 11 includes a first rectangular radiator 111 and a first trapezoidal radiator 112, the second radiation patch 12 includes a second rectangular radiator 121 and a second trapezoidal radiator 122, the first microstrip line 13 includes a first feed line 131 and a first circular feed patch 132, the first rectangular radiator 111 and the first trapezoidal radiator 112 are connected, the second rectangular radiator 121 and the second trapezoidal radiator 122 are connected, a specific current distribution is generated, and thus the radiation characteristics of the antenna unit 100 are affected, the first feed line 131 and the first circular feed patch 132 are connected. One end of 1 is connected to the first circular feed patch 132, the first feed line 131 is used to transmit the signal to the first radiation patch 11, and the first circular feed patch 132 is used to feed the signal to the first feed line 131, and the first trapezoidal radiator 112 and the second trapezoidal radiator 122 are symmetrically arranged in the first direction about the first feed line 131, which can balance the current distribution, reduce reflection, improve the impedance matching of the antenna unit 100, and reduce the standing wave ratio. The symmetrical structure can ensure that the phase difference between the left-handed and right-handed circularly polarized waves is stable, thereby improving the axial ratio bandwidth.

[0035] See also Figure 4 The first metal grounding component 201 includes a first grounding hole 151, a second grounding hole 152, a third grounding hole 153 and a fourth grounding hole 154. The first grounding hole 151 and the second grounding hole 152 are arranged on the first radiation patch 11, and the third grounding hole 153 and the fourth grounding hole 154 are arranged on the second radiation patch 12. The first grounding hole 151 and the third grounding hole 153 are symmetrically arranged in the first direction with respect to the first microstrip line 13, and the second grounding hole 152 and the fourth grounding hole 154 are symmetrically arranged in the first direction with respect to the first microstrip line 13. Through the above arrangement, the matching and axial ratio of the antenna can be improved, ensuring that the antenna unit 100 works in the best state.

[0036] See also Figure 5The third radiation patch 31 includes a third rectangular radiator 311 and a third trapezoidal radiator 312, the fourth radiation patch 32 includes a fourth rectangular radiator 321 and a fourth trapezoidal radiator 322, the second microstrip line 33 includes a second feed line 331 and a second circular feed patch 332, the third rectangular radiator 311 and the third trapezoidal radiator 312 are connected, the fourth rectangular radiator 321 and the fourth trapezoidal radiator 322 are connected, and a specific current distribution is generated, thereby affecting the radiation characteristics of the antenna unit 100, and the second feed line 331 and the second circular feed patch 332 are connected. One end of 1 is connected to the second circular feed patch 332, the second feed line 331 is used to transmit the signal to the second radiation patch 12, and the second circular feed patch 332 is used to feed the signal to the second feed line 331, and the third trapezoidal radiator 312 and the fourth trapezoidal radiator 322 are symmetrically arranged in the second direction about the second feed line 331, which can balance the current distribution, reduce reflection, improve the impedance matching of the antenna unit 100, and reduce the standing wave ratio. The symmetrical structure can ensure the stability of the phase difference between the left-handed and right-handed circularly polarized waves, thereby improving the axial ratio bandwidth.

[0037] Please continue reading Figure 5 The third radiation patch 31 is also provided with a first metal opening 34, and the fourth radiation patch 32 is also provided with a second metal opening 35. The first metal opening 34 and the second metal opening 35 are symmetrically arranged about the second microstrip line 33. Through the above arrangement, a transmission path is provided for the first signal feeding point 171 and the symmetry of the third radiation patch 31 is maintained.

[0038] In the embodiment of the present application, the third metal layer 50 is further provided with a third metal opening (not shown) and a fourth metal opening (not shown) to provide a signal transmission path for the first signal feeding point 171 and the second signal feeding point 172 .

[0039] Please continue reading Figure 5 The third metal grounding component 301 includes a sixth grounding hole 351, a seventh grounding hole 352, an eighth grounding hole 353 and a ninth grounding hole 354. The sixth grounding hole 351 and the seventh grounding hole 352 are arranged on the third radiation patch 31, the eighth grounding hole 353 and the ninth grounding hole 354 are arranged on the fourth radiation patch 32, and the eighth grounding hole 353 and the ninth grounding hole 354 are symmetrically arranged in the second direction with respect to the second microstrip line 33. The eighth grounding hole 353 and the ninth grounding hole 354 are symmetrically arranged in the second direction with respect to the second microstrip line 33. Through the above arrangement, the signal transmission path of the third radiation patch 31 and the fourth radiation patch 32 is improved, and the axial ratio of the antenna is improved.

[0040] In the embodiment of the present application, the first feeding hole assembly is symmetrically arranged in the second direction with respect to the second microstrip line 33 , and the first microstrip line 13 and the second microstrip line 33 have the same shape and size.

[0041] In the embodiment of the present application, the second metal grounding component 201, the fourth metal grounding component, and the seventh metal grounding component are all multiple metal pillars, and the multiple metal pillars are evenly arranged on the first substrate 10, the second substrate 40 and the fourth substrate 80. In the embodiment of the present application, the number of metal pillars of the second metal grounding component 201 is nine, the number of metal pillars of the fourth metal grounding component is ten, and the number of metal pillars of the seventh metal grounding component is five.

[0042] See also Figure 6 The simulation results of this design example are as follows Figure 6-9 shown. Figure 6 is the simulation result of the reflection coefficient, given by Figure 6 It can be seen that for the first port of the antenna unit 100, the bandwidth range of its reflection coefficient less than -10dB is 8.75GHz to 15.75GHz, the center frequency is 12.25GHz, the passband bandwidth is 7GHz, and the relative bandwidth is 57.1%; for the second port of the antenna unit 100, the bandwidth range of its reflection coefficient less than -10dB is 8.82GHz to 16.0GHz, the center frequency is 12.41GHz, the passband bandwidth is 7.18GHz, and the relative bandwidth is 57.9%. It can be seen from the above simulation results that the impedance passband of the antenna unit 100 has a broadband characteristic.

[0043] Figure 7 is the simulation result of the antenna unit 100 axial ratio, Figure 7 It can be seen that for the first port of the antenna unit 100, the bandwidth range of its axial ratio less than 3 is 10.25GHz to 15.33GHz, the center frequency is 12.79GHz, the passband bandwidth is 5.08GHz, and the relative bandwidth is 39.7%; for the second port of the antenna unit 100, the bandwidth range of its axial ratio less than 3 is 9.21GHz to 15.57GHz, the center frequency is 12.39GHz, the passband bandwidth is 6.36GHz, and the relative bandwidth is 51.3%. It can be seen from the above simulation results that the axial ratio passband of the antenna unit 100 has a broadband feature.

[0044] Figure 8 is the simulation result of the maximum gain of antenna unit 100, given by Figure 8It can be seen that for the first port of the antenna unit 100, the average maximum gain within the axial ratio bandwidth is 4.2dBi, and for the second port of the antenna unit 100, the average maximum gain within the axial ratio bandwidth is 3.9dBi. From the above simulation results, it can be seen that the antenna unit 100 has the characteristic of high maximum gain.

[0045] Fig. 9 is the simulation result of the radiation efficiency of the antenna unit 100, Fig. 9 It can be seen that for the first port of the antenna unit 100, the average radiation efficiency within the axial ratio bandwidth is 77.32%; for the second port of the antenna unit 100, the average radiation efficiency within the axial ratio bandwidth is 74.01%. From the above simulation results, it can be seen that the antenna unit 100 has the characteristic of high radiation efficiency.

[0046] The embodiment of the present application provides an antenna unit 100, including a first substrate 10, a first metal layer 20, a second metal layer 30, a second substrate 40, a third metal layer 50, a third substrate 60, a fourth metal layer 70, a fourth substrate 80 and a fifth metal layer 90, and the first substrate 10, the first metal layer 20, the second metal layer 30, the second substrate 40, the third metal layer 50, the third substrate 60, the fourth metal layer 70, the fourth substrate 80 and the fifth metal layer 90 are stacked in sequence from top to bottom, which can achieve more accurate impedance matching and phase control of the antenna unit 100, and the fourth metal layer 70 is set to achieve a phase difference between two radiating units, and a plurality of metal grounding hole assemblies are further set on the metal layer and the substrate, and the symmetrical arrangement of the metal grounding hole assemblies enables the antenna unit 100 to effectively suppress the coupling between different polarization components, thereby achieving a wide axial ratio bandwidth.

[0047] The embodiment of the present application also provides an embodiment of a communication device, and the communication device includes the above-mentioned antenna unit 100. The specific structure and function of the communication device can be referred to the above-mentioned embodiment, which will not be repeated here.

[0048] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An antenna unit, characterized in that: include: A first metal layer, the first metal layer comprising a first radiation patch, a second radiation patch, and a first metal grounding component, a first feeding point is arranged on the first microstrip line, and the first radiation patch and the second radiation patch are symmetrically arranged in a first direction with respect to the first microstrip line; A first substrate, on which a second metal grounding component and a first feeding hole component are disposed; a second metal layer, wherein the second metal layer comprises a third radiation patch, a fourth radiation patch, a second microstrip line and a third metal grounding component, wherein a second feeding point is provided on the second microstrip line, and the third radiation patch and the fourth radiation patch are symmetrically arranged in a second direction with respect to the second microstrip line; A second substrate, on which a fourth metal grounding component and a second feeding hole component are disposed, and the fourth metal grounding component is symmetrical about a center point of projections of the first microstrip line and the second microstrip line on the second substrate; a third metal layer, wherein a fifth metal grounding component is disposed on the third metal layer, and the fifth metal grounding hole component is symmetrical about a center point of projections of the first microstrip line and the second microstrip line on the third metal layer; a third substrate, on which a sixth metal grounding component is disposed; a fourth metal layer, wherein the fourth metal layer is connected to the third metal layer, the third substrate, the fourth substrate, and the fifth metal layer to respectively form a first antenna and a second antenna; A fourth substrate, on which a seventh metal grounding component is disposed; wherein the three metal pillars are grounding holes, and the two metal pillars are the third feeding hole and the fourth feeding hole; a fifth metal layer; The first metal layer, the first substrate, the second metal layer, the second substrate, the third metal layer, the third substrate, the fourth metal layer, the fourth substrate and the fifth metal layer are stacked in sequence from top to bottom.

2. The antenna unit according to claim 1, characterized in that The fourth metal layer is provided with a third feeding point, a fourth feeding point, a fifth feeding point, and a sixth feeding point; the fifth feeding point and the sixth feeding point are respectively connected to an external signal source through the third feeding hole and the fourth feeding hole; the third feeding point and the fourth feeding point are respectively connected to the first feeding point and the second feeding point through the first feeding hole and the second feeding hole, and transmit the signal to the first radiation patch, the second radiation patch, the third radiation patch, and the fourth radiation patch.

3. The antenna unit according to claim 1, characterized in that The third metal layer, the fourth metal layer, and the fifth metal layer are electrically connected through the fifth metal grounding component, the sixth metal grounding component, and the seventh metal grounding component, respectively.

4. The antenna unit according to claim 1, characterized in that The first radiation patch includes a first rectangular radiator and a first trapezoidal radiator, the second radiation patch includes a second rectangular radiator and a second trapezoidal radiator, the first microstrip line includes a first feeder and a first circular feed patch, the first rectangular radiator is connected to the first trapezoidal radiator, the second rectangular radiator is connected to the second trapezoidal radiator, one end of the first feeder is connected to the first circular feed patch, and the first trapezoidal radiator and the second trapezoidal radiator are symmetrically arranged in a first direction about the first feeder.

5. The antenna unit according to claim 1, characterized in that The first metal grounding component includes a first grounding hole, a second grounding hole, a third grounding hole and a fourth grounding hole, the first grounding hole and the second grounding hole are arranged on the first radiation patch, the third grounding hole and the fourth grounding hole are arranged on the second radiation patch, and the first grounding hole and the third grounding hole are symmetrically arranged in a first direction with respect to the first microstrip line, and the second grounding hole and the fourth grounding hole are symmetrically arranged in the first direction with respect to the first microstrip line.

6. The antenna unit according to claim 1, characterized in that The third radiation patch includes a third rectangular radiator and a third trapezoidal radiator, the fourth radiation patch includes a fourth rectangular radiator and a fourth trapezoidal radiator, the second microstrip line includes a second feeder and a second circular feed patch, the third rectangular radiator and the third trapezoidal radiator are connected, the fourth rectangular radiator and the fourth trapezoidal radiator are connected, one end of the second feeder is connected to the second circular feed patch, and the third trapezoidal radiator and the fourth trapezoidal radiator are symmetrically arranged in the second direction about the second feeder.

7. The antenna unit according to claim 5, characterized in that: The third metal grounding component includes a sixth grounding hole, a seventh grounding hole, an eighth grounding hole and a ninth grounding hole, the sixth grounding hole and the seventh grounding hole are arranged on the third radiation patch, the eighth grounding hole and the ninth grounding hole are arranged on the fourth radiation patch, and the eighth grounding hole and the ninth grounding hole are arranged symmetrically in the second direction with respect to the second microstrip line, and the eighth grounding hole and the ninth grounding hole are arranged symmetrically in the second direction with respect to the second microstrip line.

8. The antenna unit according to claim 1, characterized in that The first feeding hole components are symmetrically arranged in a second direction with respect to the second microstrip line.

9. The antenna unit according to claim 1, characterized in that: The first microstrip line and the second microstrip line have the same shape and size.

10. A communication device, characterized in that: Comprising the antenna unit as described in any one of claims 1-9.

Images