Antenna device and antenna array

Abstract

The embodiment of the invention provides an antenna device and an antenna array. The antenna device comprises a main board and an antenna unit fixed on the upper surface of the main board, a power division network is integrated on the upper surface of the mainboard, and an output port of the power division network is connected with the antenna unit; and the mainboard feeds the antenna unit through the power division network. The antenna device is light in weight and low in profile, and cost reduction and efficiency improvement are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to an antenna device and an antenna array. Background Art

[0002] Macro base stations are mainly applied to outdoor scene coverage. In a macro base station, an AAU (Active Antenna Unit) generally needs to be hung on an outdoor signal tower. Since the assembly position of the AAU is relatively high, issues such as the windward area and weight need to be considered. Therefore, there are certain requirements for the overall volume and weight of the AAU. So how to achieve small size, light weight, high integration, high reliability, and low cost of the device is a research topic that equipment manufacturers need to consider.

[0003] However, antennas usually occupy a relatively large space inside the AAU. The design of the antenna needs to reduce the overall height and volume of the antenna board, and while the design needs to be more integrated, the radiation performance of the antenna should be ensured. Currently, how to achieve a smaller and lighter AAU device remains an issue to be solved. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide an antenna device and an antenna array to achieve the lightweight and miniaturization of the antenna.

[0005] In a first aspect, the embodiments of the present invention provide an antenna device, including:

[0006] A main board and an antenna unit fixed on the upper surface of the main board;

[0007] A power distribution network is integrated on the upper surface of the main board, and the output ports of the power distribution network are connected to the antenna unit;

[0008] The main board feeds the antenna unit through the power distribution network.

[0009] Optionally, the antenna unit includes a lower radiation patch, an upper dielectric board, and an upper radiation patch;

[0010] The lower radiation patch is integrated on the upper surface of the main board;

[0011] The upper dielectric board is disposed at a first height above the main board, and the upper radiation patch is disposed on the upper surface of the upper dielectric board;

[0012] The output ports of the power distribution network are connected to the lower radiation patch;

[0013] The main board feeds the lower radiation patch through the power distribution network, and the lower radiation patch feeds the upper radiation patch by coupling.

[0014] Optionally, the main board is provided with first screw holes for fixing the main board, and screw posts facing the main board are provided at positions on the upper dielectric board opposite to the first screw holes, and the screw posts form second screw holes on the surface of the upper dielectric board;

[0015] The main board fixing screw passes through the second screw hole and the first screw hole to fix the upper dielectric board above the main board.

[0016] Optionally, the power distribution network has two output ports, and the two output ports are respectively connected to both ends of the first side of the lower radiation patch.

[0017] Optionally, the upper radiation patch is a rectangular patch with its four corners cut off;

[0018] The lower radiation patch is a rectangular patch with two corners of its second side cut off, the second side is opposite to the first side, and the lower radiation patch is provided with a semicircular groove on the side of the first side.

[0019] Optionally, the power distribution network includes output lines respectively corresponding to each output port, and each output line includes a feeder line and a quarter impedance transformation line connecting the feeder line to the antenna unit.

[0020] Optionally, the upper dielectric board is an abs plastic board.

[0021] Optionally, the upper radiation patch is electroplated on the upper surface of the upper dielectric board.

[0022] Optionally, the power distribution network and the lower radiation patch are integrated on the upper surface of the main board through PCB manufacturing process.

[0023] In a second aspect, an embodiment of the present invention further provides an antenna array, including a plurality of the antenna devices as described in any one of the above, and each of the antenna devices is arranged in an array.

[0024] Beneficial effects of the embodiments of the present invention:

[0025] The antenna device and the antenna array provided by the embodiments of the present invention integrate a power distribution network on the upper surface of the main board, and connect the output ports of the power distribution network to the antenna unit, so as to realize the feeding of the antenna unit based on the combination of the main board structure and the antenna unit structure, without the need to combine the antenna unit and the main board through connectors and adapter boards, reducing the structure required for the overall antenna, being able to greatly reduce the weight of the antenna, reduce the antenna profile and shrink the antenna volume. When applied to AAU equipment, it will greatly reduce the weight and volume of the antenna inside the AAU, and also make the AAU equipment more miniaturized and lightweight.

[0026] Of course, it is not necessary for any product or method implementing the present invention to achieve all of the above-described advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other embodiments based on these drawings.

[0028] Figure 1 is a schematic structural diagram of an antenna main body in the related art;

[0029] Figure 2 is a schematic connection diagram of an antenna main body and a main board in the related art;

[0030] Figure 3 is a schematic structural diagram of an antenna device provided by an embodiment of the present invention;

[0031] Figure 4 is a side view of an antenna device provided by an embodiment of the present invention;

[0032] Figure 5 is a perspective view of an antenna device provided by an embodiment of the present invention;

[0033] Figure 6 is a top view of an upper radiation patch provided by an embodiment of the present invention;

[0034] Figure 7 is a top view of a lower radiation patch provided by an embodiment of the present invention;

[0035] Figure 8 is a schematic diagram of simulation results of return loss and isolation of an antenna device provided by an embodiment of the present invention;

[0036] Figure 9 is an antenna horizontal pattern of an antenna device provided by an embodiment of the present invention;

[0037] Figure 10 is an antenna vertical pattern of an antenna device provided by an embodiment of the present invention;

[0038] Figure 11 is a perspective view of an antenna array provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art based on this application belong to the scope of protection of the present invention.

[0040] At present, base station equipment has been very mature, and the integration of existing AAU equipment is already relatively high. However, cost reduction and efficiency improvement have always been an inescapable topic. How to achieve smaller and lighter equipment is still an issue that designers need to consider.

[0041] Taking the design of a sub 6G (a radio frequency band) base station as an example, the antenna body used to implement the antenna function is designed as an independent component. In actual applications, a matching connector is required to connect the antenna body to the main device motherboard. For the antenna structure applied to the AAU, this main device motherboard is the motherboard of the AAU. For the convenience of description, the main device motherboard will be simply referred to as the motherboard hereinafter.

[0042] A conventional design structure of an antenna body is as Figure 1 shown. See Figure 1 , which includes an antenna unit, an antenna power layer, a reflector, an adapter board, and a connector.

[0043] Generally speaking, the antenna unit is usually designed in the form of a sheet metal oscillator (a metal oscillator, usually made of nickel-plated steel, cupronickel, etc. through bending and sheet metal processing) or a PCB (printed circuit board) oscillator, and the antenna unit is supported by antenna struts welded on the antenna power layer. Moreover, since the positions of the connectors on the motherboard are usually inconsistent with the input port positions of the antenna power layer, an adapter board is also required to compensate for the antenna wire length. In addition, a separate reflector needs to be designed for the antenna body. The function of the reflector is to reflect the antenna radiation energy and support the entire board of the antenna. Conventional designs usually use a large-area aluminum metal plate as the reflector.

[0044] When connecting the above-mentioned antenna body and the motherboard, the antenna connector of the antenna body is plugged into and connected to the motherboard connector. After connection, the antenna body and the motherboard are as Figure 2 shown. See Figure 2 . When connecting the antenna body and the motherboard based on the above design, a motherboard shielding cavity is also required.

[0045] Based on the above content, it can be seen that the use of connectors will bring additional losses and costs, and the assembly between the antenna body and the motherboard will also occupy additional space, thereby making the overall volume and weight of the antenna relatively large.

[0046] In view of this, an embodiment of the present invention provides an antenna device, which integrates the structure of the antenna main body with the main board. Refer to Figure 3 , the antenna device includes:

[0047] A main board 1 and an antenna unit 2 fixed on the upper surface of the main board 1;

[0048] A power distribution network 3 is integrated on the upper surface of the main board 1, and the output port of the power distribution network 3 is connected to the antenna unit 2;

[0049] The main board 1 feeds power to the antenna unit 2 through the power distribution network 3.

[0050] Among them, the main board 1 is specifically a PCB main board. The antenna unit 2 is a component for radiating signals outward. As an example, the antenna unit 2 can specifically be a patch oscillator.

[0051] It should be understood that in order for the antenna unit 2 to be able to radiate signals outward, a feeding network matching the antenna unit 2 needs to be configured in the antenna device. Such a feeding network is specifically manifested as a power distribution network, simply referred to as a power distribution network. In the embodiment of the present invention, the power distribution network is not taken as an independent component of the antenna main body structure, but the power distribution network 3 is integrated on the upper surface of the main board, and the output port of the power distribution network 3 is connected to the antenna unit 2. That is to say, the embodiment of the present invention conducts an integrated design on the antenna main body structure and the main board. In the case where the antenna main body is not designed as an independent component in the embodiment of the present invention, there is no need to connect the antenna main body and the main board through a connector, and thus there is no problem that the positions of the connectors on the main board and the input ports of the antenna power layer are inconsistent, and there is no need to use an adapter board to compensate for the wire length.

[0052] When the antenna device is in a working state, the output port of the power distribution network 3 feeds power to the antenna unit 2, and the antenna unit 2 can radiate electromagnetic waves outward after receiving the power.

[0053] In a specific implementation, the integration of the power distribution network 3 on the upper surface of the main board 1 can be achieved through PCB board manufacturing and processing.

[0054] In addition, in order to ensure the performance of the antenna unit in directional signal transmission and reception, a structure with signal reflection and shielding functions needs to be provided below the antenna unit. Therefore, when independently designing the main antenna structure, a separate reflector needs to be provided below the antenna unit. In the case of the integrated design of the antenna unit 2 and the main board 1 in the embodiment of the present invention, since the main board 1 usually has a GND (ground) layer, and the GND metal layer itself has the performance of reflecting and shielding signals, the reflector required for the antenna can be integrated by adding a GND metal layer to the main board 1. When the antenna unit 2 is fixed on the upper surface of the main board 1, the GND metal layer can play the role of reflecting the signals transmitted or received by the antenna unit 2 and shielding other electromagnetic wave interferences from the rear, ensuring the performance of the antenna unit 2 in directional signal transmission and reception, thus eliminating the need to design a separate reflector.

[0055] The antenna device provided by the embodiment of the present invention integrates a power distribution network on the upper surface of the main board, and connects the output port of the power distribution network to the antenna unit, thereby realizing the feeding of the antenna unit based on the combination of the main board structure and the antenna unit structure, without the need to combine the antenna unit and the main board through connectors and adapter boards, reducing the overall structure required for the antenna, significantly reducing the weight of the antenna, reducing the antenna profile, and shrinking the antenna volume. When applied to an AAU device, it will greatly reduce the weight and volume of the antenna inside the AAU, and also make the AAU device more miniaturized and lightweight.

[0056] In one or more embodiments of the present invention, the antenna unit 2 specifically adopts a double-layer patch design. In this case, the side view and the three-dimensional view of the antenna device are respectively as Figure 4 and Figure 5 shown. The structure of the antenna unit will be further described below in conjunction with Figure 4 and Figure 5 and specific examples.

[0057] In one embodiment of the present invention, the antenna unit 2 includes a lower radiation patch 21, an upper dielectric board 22, and an upper radiation patch 23;

[0058] The lower radiation patch 21 is integrated on the upper surface of the main board 1;

[0059] The upper dielectric board 22 is disposed at a first height above the main board 1, and the upper radiation patch 23 is disposed on the upper surface of the upper dielectric board 22;

[0060] The output port of the power distribution network 3 is connected to the lower radiation patch 21;

[0061] The main board 1 feeds the lower radiation patch 21 through the power distribution network 3, and the lower radiation patch 21 and the upper radiation patch 23 are coupled for feeding.

[0062] Among them, the upper radiation patch 23 and the lower radiation patch 21 are specifically thin sheets made of conductors.

[0063] According to the records in the related technology, the antenna unit in the form of a patch is formed by attaching a conductor thin sheet on a dielectric substrate with a conductor ground plane. By feeding the conductor patch, a radio frequency electromagnetic field can be excited between the conductor patch and the ground plane, and radiated outward through the gap between the patch and the surrounding ground plane.

[0064] In the embodiment of the present invention, the power distribution network 3 feeds the lower radiation patch 21, and the upper radiation patch 23 is used as a director of the lower radiation patch 21.

[0065] The upper dielectric plate 22 is specifically arranged at a first height above the main board 1, where the specific size of the first height can be set based on actual requirements. In this case, the power distribution network 3 does not directly feed the upper radiation patch 23, but feeds the upper radiation patch 23 based on the coupling effect between the lower radiation patch 21 and the upper radiation patch 23.

[0066] Specifically, when the antenna device is in the working state, the power distribution network 3 transmits current to the lower radiation patch 21 through the output port, and radiation is generated between the lower radiation patch 21 and the reflector 4. At the same time, there is a coupling effect between the upper radiation patch 23 and the lower radiation patch 21, enabling the upper radiation patch 23 to further broaden the frequency band.

[0067] In a possible implementation manner, the upper dielectric plate 22 can specifically be an abs (Acrylonitrile Butadiene Styrene) plastic plate. Exemplarily, for this case, the upper radiation patch 23 can be electroplated on the upper surface of the upper dielectric plate 22, so that in the production process of the antenna device, the upper radiation patch 23 can be integrated on the upper dielectric plate 22 based on the metal electroplating process of the plastic plate, without the need to fix the antenna oscillator by welding.

[0068] The lower radiation patch 21 can be specifically implemented through the PCB board manufacturing process when producing the main board 1.

[0069] Moreover, in the embodiment of the present invention, the main board 1 constitutes the lower dielectric plate of the lower radiation patch 21, and the parameters of the dielectric plate can be designed based on actual requirements during specific implementation.

[0070] Based on the above description, it can be seen that the lower radiation patch 21 of the antenna unit 2 only occupies the layer of the main board 1, which belongs to the reduction of the structure of the antenna part, and there is no need to weld the lower radiation patch 21. Only by fixing the upper dielectric plate 22 provided with the upper radiation patch 23 on the main board 1 can the assembly of the antenna device be completed, greatly reducing the assembly cost of the antenna device.

[0071] When the antenna device is in the working state, the lower radiation patch 21 is fed through the power dividing network 3, and the upper radiation patch 23 is used as a director for the lower radiation patch 21, which can increase the bandwidth and improve the gain, thereby enhancing the performance of the antenna device.

[0072] In an embodiment of the present invention, the main board 1 is provided with a first screw hole for fixing the main board 1, and at a position on the upper dielectric board 22 opposite to the first screw hole, there is a screw pillar 221 facing the main board. The screw pillar 221 forms a second screw hole on the surface of the upper dielectric board 22.

[0073] The main board fixing screw 5 passes through the second screw hole and the first screw hole to fix the upper dielectric board 22 above the main board 1.

[0074] As mentioned above, the lower radiation patch 21 only occupies the layer of the main board 1. Therefore, when assembling the antenna device according to the embodiment of the present invention, fixing the upper dielectric board 22 provided with the upper radiation patch 23 above the lower radiation patch 21 can complete the assembly.

[0075] In practical applications, there is usually a need to fix the main board of the antenna device to an external structure such as a base or a bracket. Therefore, the main board 1 is usually provided with screw hole positions (i.e., the first screw holes) for fixing the main board. When applying, passing the main board fixing screw 5 through these screw hole positions can fix the main board 1 to the external structure.

[0076] The embodiment of the present invention specifically reuses the first screw hole for fixing the main board, and at a position on the upper dielectric board 22 opposite to the first screw hole, a screw pillar 221 facing the main board 1 is provided. The screw pillar 221 is a hollow pillar, so that a second screw hole can be formed on the surface of the upper dielectric board.

[0077] In this case, passing the main board fixing screw 5 through the second screw hole, the screw pillar 221, and the original first screw hole on the main board 1 can simultaneously fix the upper dielectric board 22 and the main board 1. Among them, the screw pillar 221 can play a supporting role for the upper dielectric board 22.

[0078] Continuing from the previous example, when the upper dielectric board 22 is specifically an ABS plastic board, when producing the upper dielectric board 22, the screw pillar 221 can be integrally formed on the ABS plastic board.

[0079] It can be seen that in the embodiment of the present invention, on the basis of the original first screw hole on the main board 1, the screw pillar 221 is integrally formed on the upper dielectric board 22, so that the upper dielectric board 22 and the main board 1 can be simultaneously fixed by combining the inherent main board fixing screw 5 and the first screw hole, which is beneficial to assembly and can avoid occupying the radiation antenna area.

[0080] In addition, in one or more embodiments of the present invention, specific designs are also made for the upper radiation patch 23 and the lower radiation patch 21 respectively. The schematic diagrams of the upper radiation patch 23 and the lower radiation patch 21 are respectively as Figure 6 and Figure 7 shown. Below, in combination with Figure 6 , Figure 7 and specific examples, the specific structure of the antenna element 2 will be further described.

[0081] In one embodiment of the present invention, the antenna element 2 is specifically a dual-polarized dipole. In this embodiment, the power distribution network 3 has two output ports, and the two output ports are respectively connected to both ends of the first side of the lower radiation patch 21.

[0082] Among them, the first side can specifically be any side of the lower radiation patch 21.

[0083] It should be understood that the power distribution network can divide the signal into multiple signals with the same or different energies for separate output, and each of its output ports can output one signal. In the embodiment of the present invention, the lower radiation patch 21 is fed by the two output ports of the power distribution network 3 at the same time, and the antenna element 2 can radiate polarized electromagnetic waves. As an example, the dual-polarized dipole applied in the embodiment of the present invention can specifically be a ±45° dual-polarized dipole.

[0084] In practical applications, by changing the sizes of the upper radiation patch 23 and the lower radiation patch 21, the operating bandwidth of the antenna device can be adjusted to ensure that the performance of the antenna device can meet the application requirements in different scenarios.

[0085] In one embodiment of the present invention, the upper radiation patch 23 is a rectangular patch with its four corners cut off;

[0086] The lower radiation patch 21 is a rectangular patch with its two corners on the second side cut off. The second side is opposite to the first side, and a semicircular groove is provided on the side of the lower radiation patch 21 on the first side.

[0087] As described above, the antenna element 2 involved in the embodiment of the present invention is specifically a dual-polarized dipole, and in the implementation application, the power distribution network 3 feeds the lower radiation patch 21 of the antenna element 2 through two output ports. In this case, to ensure the polarization performance of the antenna element 2, it is necessary to improve the isolation between ports.

[0088] In the embodiment of the present invention, chamfers are designed around the upper radiation patch 23; chamfers are designed on one side of the lower radiation patch 21 and a semicircular groove is added on its side to improve the isolation between ports.

[0089] Among them, the sizes of the chamfers and the semicircular groove can be adjusted according to actual needs.

[0090] In the above design of the embodiment of the present invention, by changing the shape of the radiation patch, the current excitation mode inside the antenna is changed, and thus the isolation degree inside the antenna unit 2 can be effectively improved.

[0091] In specific implementation, the processing of the upper radiation patch 23 and the lower radiation patch 21 can be completed by chamfering the rectangular patch and digging a semi-circular groove. Therefore, the antenna oscillator adopting the above design not only has good performance, but is also easy to manufacture and process during production.

[0092] In an embodiment of the present invention, the power distribution network 3 includes output lines respectively corresponding to each output port, and each output line includes a quarter-wave impedance transformation line and a feeder line connected in series.

[0093] Specifically, the power distribution network 3 may include multiple output lines, and each output line corresponds to an output port respectively, so that the power distribution network can feed the lower radiation patch 21 based on these output lines. In the embodiment of the present invention, each output line includes a feeder line and a quarter-wave impedance transformation line connecting the feeder line to the antenna unit 2.

[0094] As an example, the above feeder line may specifically adopt a 50 ohm feeder line.

[0095] See Figure 7 For the two output lines shown in, the part with the same width in the middle of each output line is the feeder line, and the parts with uneven widths on both sides are the quarter-wave impedance transformation lines. As Figure 7 shown, the lower radiation patch is first connected to a section of the quarter-wave impedance transformation line and then connected to the feeder line through the quarter-wave impedance transformation line. This part of the quarter-wave impedance transformation line can be used to achieve impedance matching between the feeder line and the patch oscillator; similarly, inside the power distribution network, the output port of the power distribution device can also be first connected to the quarter-wave impedance transformation line and then connected to the feeder line through the quarter-wave impedance transformation line. This part of the quarter-wave impedance transformation line can be used to achieve impedance matching between the feeder line and the power distribution device. Thus, the design of the above output line can reduce the reflection loss of the signal output power during transmission between lines, and further improve the performance of the antenna device.

[0096] In a preferred embodiment of the present invention, for the antenna device shown in Figure 4 and Figure 5 , when the antenna unit 2 is a ±45° dual-polarized oscillator, and its upper radiation patch 23 adopts the design shown in Figure 6 and the lower radiation patch 21 adopts the design shown in Figure 7 , the relevant designs and parameters of each structure are specifically as follows:

[0097] In this embodiment, the upper radiation patch 23 is implemented in the form of a plastic plate electroplated with metal. The upper radiation patch 23 is a square patch with a side length of 31.5 mm and a thickness of 0.035 mm, and the side length of the chamfered corners around it is 2.82 mm. Moreover, the plastic plate serving as the upper dielectric plate 22 is integrally formed with the screw pillar 221, and the main board fixing screw 5 fixes the plastic plate and the main board 1 simultaneously.

[0098] The lower radiation patch 21 is integrated with the main board 1 and is realized by PCB board manufacturing and processing. The lower radiation patch 21 is a square patch with a size of 26 mm and a thickness of 0.035 mm, and the diameter of the semi-circular groove on its side is 3.6 mm. The main board 1 constitutes the lower dielectric plate of the lower radiation patch 21, and the dielectric constant of the dielectric plate is 3 and the loss factor is 0.0031.

[0099] It can be seen that the antenna device provided in this embodiment utilizes the combination of part of the antenna structure and part of the PCB layer of the main board to achieve a design that can meet the antenna power split feeding network. This antenna device mainly consists of the upper radiation patch 23 integrated in the plastic plate, the lower radiation patch 21 integrated on the main board, and the power split network 3. By integrating part of the antenna components (the lower radiation patch 21, the power split network 3) on the main board 1, the integration degree of the antenna is improved.

[0100] In the overall design, the screw hole positions for fixing the main board are utilized, and screw pillars 221 are added to the upper plastic electroplated board, so that fixing the main board 1 can fix the upper plastic electroplated board. Moreover, neither the upper radiation patch 23 nor the lower radiation patch 21 needs to be welded. In practical applications, there are usually many components attached to the lower surface of the main board. If the upper surface for setting the antenna does not need to be welded, then the main board does not need to consider the oscillator surface for patching, and the patching difficulty of the main board is low. Therefore, the antenna device provided in the embodiment of the present invention has the advantages of fewer required hole types on the PCB main board, low loss, and easy processing, and has wide application value.

[0101] In addition, in terms of the current antenna design scheme, the original antenna full-board scheme includes components such as a feed core, a reflector, an isolation strip, a power split board A double-sided copper clad board, a P-SMP (a type of connector) joint, and a coupling board B. Compared with the antenna full-board scheme (i.e., the current antenna full-board scheme) involved in the embodiment of the present invention, the differences in components are as follows:

[0102] Original antenna whole board solution Current antenna whole board solution Feeding core Cancel Shielding cover Cancel Antenna element Antenna element Reflector Cancel Isolation strip Cancel Power splitter board A double-sided copper clad laminate Integrated with main board Power splitter board B double-sided copper clad laminate Integrated with main board P-SMP connector Cancel Coupling board B Cancel Coupling board A Cancel

[0103] Specifically, since the embodiments of the present invention integrate the lower radiation patch 2 included in the antenna unit 2 and the power distribution network 3 for feeding the lower radiation patch 2 with the main board 1, when feeding the antenna unit 2, the power distribution network 3 can directly feed the antenna unit 2 through a quarter impedance transformation line and a feed wire, without establishing an electrical connection between the main board and the antenna unit through additional connecting devices, and naturally does not require devices such as feed cores, P-SMP connectors, and coupling plates.

[0104] Moreover, integrating the antenna unit 2 and the main board 1 as a whole also does not require the use of devices such as shielding covers and isolation strips. At the same time, the GND metal layer of the main board 1 can be utilized as a reflector, and there is no need to design an independent reflector.

[0105] It can be seen that the design of the antenna device provided by the embodiments of the present invention effectively reduces the components required for the antenna, and the radiation performance of the antenna device is not affected, which is beneficial to simplifying the antenna structure and reducing costs.

[0106] Next, the performance of the antenna device will be further described in combination with the electromagnetic simulation results of the antenna device in this example.

[0107] Figure 8 The simulation results of the return loss (S1,1) and isolation (S2,1) of the above antenna device are shown. The horizontal axis is the operating frequency (Frequency) of the antenna device, with the unit of gigahertz (GHz), and the vertical axis is the value of the S parameter, with the unit of decibel (dB). Refer to Figure 8 , where the curve from data point 1 (3.4 GHz, S1,1 = -16.65077) to data point 2 (3.6 GHz, S1,1 = -18.01118) shows the S1,1 of the antenna device in the 3400m - 3600m frequency band, and the curve from data point 4 (3.4 GHz, S2,1 = -21.16431) to data point 3 (3.6 GHz, S2,1 = -25.27954) shows the S2,1 of the antenna device in the 3400m - 3600m frequency band. It can be seen that in the 3400m - 3600m frequency band, the S1,1 of the antenna device is less than -15 dB, and the isolation is less than -20 dB, having good operating performance.

[0108] Figure 9 and Figure 10 respectively show the horizontal radiation pattern and vertical radiation pattern of the antenna of the above antenna device at a frequency of 3.5 GHz. The gain of the antenna reaches 8.53 dBi (a unit of power gain), and the beam width is above 71°, and the performance meets the requirements of a dual-polarization array.

[0109] Combined with the above simulation results, in specific implementation, the antenna device provided in any of the above embodiments of the present invention can be applied to a sub 6G 3.5G base station to ensure the optimal performance of the antenna.

[0110] Based on the same inventive concept, an embodiment of the present invention further provides an antenna array, including a plurality of the antenna devices provided in any of the above embodiments, and the antenna devices are arranged in an array.

[0111] The schematic diagram of the antenna array is specifically as Figure 11 shown.

[0112] Based on Figure 11 It can be seen that the main board 1 in the antenna array exists as a whole, and the upper dielectric board 22 is also a whole in the same way. When implementing the antenna array, for the lower radiation patch 21, the integration of a plurality of lower radiation patches 21 and the power distribution network 3 required for these lower radiation patches 21 can be realized based on the PCB manufacturing process; for the upper radiation patch 23, a plurality of upper radiation patches are integrated on a plastic board by electroplating, and screw pillars 221 corresponding to the screw hole positions of the main board are designed on the plastic board. The plastic board is light in weight and integrally formed, suitable for mass production, and conducive to the assembly of the antenna array.

[0113] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0114] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized.

[0115] The above are only the preferred embodiments of the present invention, and are not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. An antenna device, characterized in that, Comprising: A main board (1) and an antenna unit (2) fixed on the upper surface of the main board (1); A power splitter network (3) is integrated on the upper surface of the main board (1), and an output port of the power splitter network (3) is connected to the antenna unit (2); The main board (1) feeds power to the antenna unit (2) through the power splitter network (3).

2. The antenna device according to claim 1, characterized in that, The antenna unit (2) includes a lower radiation patch (21), an upper dielectric board (22), and an upper radiation patch (23); The lower radiation patch (21) is integrated on the upper surface of the main board (1); The upper dielectric board (22) is disposed at a first height above the main board (1), and the upper radiation patch (23) is disposed on the upper surface of the upper dielectric board (22); The output port of the power splitter network (3) is connected to the lower radiation patch (21); The main board (1) feeds power to the lower radiation patch (21) through the power splitter network (3), and the lower radiation patch (21) feeds power to the upper radiation patch (23) by coupling.

3. The antenna device according to claim 2, wherein, The main board (1) is provided with a first screw hole for fixing the main board (1), and at a position on the upper dielectric board (22) opposite to the first screw hole, there is a screw pillar (221) facing the main board, and the screw pillar (221) forms a second screw hole on the surface of the upper dielectric board (22); A main board fixing screw (5) passes through the second screw hole and the first screw hole to fix the upper dielectric board (22) above the main board (1).

4. The antenna device according to claim 2, wherein, The power splitter network (3) has two output ports, and the two output ports are respectively connected to both ends of the first side of the lower radiation patch (21).

5. The antenna device according to claim 4, characterized in that, The upper radiation patch (23) is a rectangular patch with its four corners cut off; The lower radiation patch (21) is a rectangular patch with two corners of the second side cut off, the second side is opposite to the first side, and the lower radiation patch (21) is provided with a semi-circular groove on the side of the first side.

6. The antenna device according to claim 1, wherein The power splitter network (3) includes output lines respectively corresponding to each output port, and each output line includes a feeding wire and a quarter impedance transformation line connecting the feeding wire to the antenna unit (2).

7. The antenna device according to claim 2, characterized in that, The upper dielectric board (22) is an abs plastic board.

8. The antenna device according to claim 2, wherein, The upper radiation patch (23) is electroplated on the upper surface of the upper dielectric board (22).

9. The antenna device according to claim 2, wherein, The power splitter network (3) and the lower radiation patch (21) are integrated on the upper surface of the main board (1) through PCB board manufacturing technology.

10. An antenna array, characterized in that, Including a plurality of antenna devices as described in any one of claims 1 - 9, and each of the antenna devices is arranged in an array.

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