CN210015960U

CN210015960U - Active antenna unit, shell and inner shell

Info

Publication number: CN210015960U
Application number: CN201921127983.XU
Authority: CN
Inventors: 童恩东
Original assignee: Shenzhen Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-17
Publication date: 2020-02-04
Anticipated expiration: 2029-07-17
Also published as: CN112201947A

Abstract

The application discloses an active antenna unit, a shell and an inner shell. This inner shell includes integrated into one piece's barrel, the surface of barrel includes at least three holding surface, the holding surface is used for setting up the components and parts of active antenna unit. Through the mode, the manufacturing process can be simplified, and the production cost is saved.

Description

Active antenna unit, shell and inner shell

Technical Field

The present application relates to the field of radio frequency technologies, and in particular, to an Active Antenna Unit (AAU), a housing, and an inner housing.

Background

With the rapid development of mobile communication technology, especially the upcoming 5G communication, more demanding technical requirements are put forward for the whole communication system architecture, i.e. to realize efficient, rapid and large-capacity communication, the system module needs to be highly integrated, miniaturized, light-weighted and low-cost. The antenna is used as an important part of a communication system, and the performance of the antenna plays a vital role in the overall performance of a base station system; in order to realize large-capacity communication, the number of antennas adopted by the large-scale array 5G Massive MIMO technology is changed from 2, 4 or 8 to 64, 128 or 256.

The inventor of this application discovers in long-term research and development process that current a plurality of antennas set up on the fixed column, and the casing of every antenna independently sets up, and area occupied is big, increases the cost.

SUMMERY OF THE UTILITY MODEL

The present application provides an active antenna unit, a housing and an inner housing to solve the above problems.

In order to solve the technical problem, the application adopts a technical scheme that: the utility model provides an active antenna unit's inner shell, it includes integrated into one piece's barrel, the surface of barrel includes at least three holding surface, the holding surface is used for setting up active antenna unit's components and parts.

In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a housing for an active antenna unit, comprising an outer housing and the inner housing, the inner housing being disposed within the outer housing.

In order to solve the above technical problem, another technical solution adopted by the present application is: the active antenna unit comprises the shell, a base station antenna, a filter assembly and a power amplification board, wherein the base station antenna, the filter assembly and the power amplification board are arranged in the shell, the base station antenna is covered above the filter assembly, the power amplification board is arranged on one side, deviating from the base station antenna, of the filter assembly, the filter assembly receives and transmits radio-frequency signals through the base station antenna, and the power amplification board is used for carrying out power amplification on the radio-frequency signals.

The beneficial effects of the embodiment of the application are that: different from the prior art, the inner shell of the active antenna device comprises an integrally formed cylinder body, the outer surface of the cylinder body comprises at least three supporting surfaces, and the supporting surfaces are used for arranging components of the active antenna unit, so that the inner shell can be provided with at least three active antenna units, and the area occupied by the active antenna units is reduced; in addition, the inner shell is integrally formed, so that the manufacturing process can be simplified, and the production cost is saved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of an inner shell of the present application;

FIG. 2 is a schematic view of the structure of the heat sink of FIG. 1;

FIG. 3 is a schematic structural view of an embodiment of the enclosure of the present application;

FIG. 4 is a schematic structural view of an embodiment of the support cover of the present application;

FIG. 5 is a schematic structural view of an embodiment of the housing of the present application;

FIG. 6 is a schematic diagram of an active antenna element according to an embodiment of the present invention

FIG. 7 is a schematic diagram of an embodiment of the base station antenna of FIG. 6;

FIG. 8 is a schematic cross-sectional view of the base station antenna of FIG. 7 taken along line I-I;

FIG. 9 is a schematic diagram of another embodiment of the base station antenna of FIG. 6;

fig. 10 is a schematic diagram of the structure of a filter cell of the filter assembly of fig. 6;

figure 11 is a schematic diagram of the construction of the baffle assembly of the filter assembly of figure 6;

fig. 12 is a schematic diagram of another embodiment of an active antenna element of the present application;

fig. 13 is a schematic diagram of another embodiment of an active antenna element of the present application;

fig. 14 is a schematic structural diagram of another embodiment of an active antenna element of the present application;

fig. 15 is a schematic structural diagram of an embodiment of the street lamp antenna according to the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first" and "second" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The active antenna element of the present application is not an antenna in the conventional sense, and organically combines a radio frequency subsystem (e.g., the filter assembly, power amplifier board of the present application) with a base station antenna; namely, the active antenna unit carries out digital processing on the feed network of the traditional antenna. The conventional base station has a separate rf unit and antenna, and the active antenna unit combines an active rf unit (filter assembly, power amplifier board) and an antenna (base station antenna). The active antenna Unit integrates a Remote Radio Unit (RRU) Unit and an antenna, so that power amplification and reception of the RRU Unit are fully utilized. According to the active antenna unit, the RRU unit and the antenna are integrated in the antenna housing, a radio frequency port is provided for the outside, and the radio frequency port is used for sending radio frequency signals to the outside vector network analyzer.

Referring to fig. 1 and 6, the inner housing 12 of the present application includes an integrally formed cylinder 121, an outer surface of the cylinder 121 includes at least three supporting surfaces 122, and the supporting surfaces 122 are used to dispose components of the active antenna unit 10 (the components may be the power amplifier board 17, the filter assembly 15, and the base station antenna 16 of the active antenna unit 10).

Wherein, the inner shell 12 can be integrally extruded and formed; the inner shell 12 may be made of a metallic material that may include one or more of silver, copper, aluminum, gold, iron, chromium, manganese, or titanium. The material of the inner shell 12 of the present application may be aluminum, i.e., the inner shell 12 is an aluminum extrusion.

In an application scene, firstly, the material for manufacturing the inner shell 12 is heated and melted so as to enable the material to be in a fluid state; then, a screw or a plunger is adopted to push a machine head die to extrude the melted material along a fixed direction, and the melted material can be forced to pass through an opening of the machine head die to be formed into a continuous section with a constant section under the pushing of pressure by virtue of the extrusion action of the screw or the plunger, wherein the continuous section comprises a cylinder body 121, and the extrusion direction of the machine head die is parallel to the length direction of the cylinder body 121; and finally, cooling the continuous section by a cooling device to ensure that the continuous section loses the plastic state and is solidified.

The outer surface of the cylinder 121 of this embodiment may include three supporting surfaces 122, that is, the cross-sectional shape of the cylinder 121 along the axial direction of the inner housing 12 is triangular; one active antenna element 10 may be disposed on each supporting surface 122, so that three active antenna elements 10 may be disposed on the inner housing 12, which can reduce the area occupied by the active antenna elements 10.

In addition, in the present embodiment, the inner shell 12 is integrally formed by using an extrusion process, and compared with the existing forming process, the cutting and polishing processes are not needed, so that the material waste is not caused, the manufacturing process can be simplified, and the production cost can be saved.

The inner surface of the cylinder 121 is provided with a plurality of fins 123 for radiating heat from the cylinder 121, and the plurality of fins 123 are integrally formed with the cylinder 121.

As shown in fig. 2, the heat dissipation fins 123 corresponding to each supporting surface 122 are axisymmetrical about the center line a of the supporting surface 122, and a wave-peak arrangement structure is formed between the center line a and the two side edges of the supporting surface 122, that is, the height of the heat dissipation fins 123 located at the center line a is greater than the height of the heat dissipation fins 123 located at the two side edges of the supporting surface 122, so that the plurality of heat dissipation fins 123 and the barrel 121 can be integrally formed, the manufacturing process is simplified, and the production cost is saved.

The inner surface of the cylinder 121 is further provided with a plurality of ribs 124, and the ribs 124 are integrally formed with the cylinder 121. Each support surface 122 is provided with mounting apertures 125, and components of the active antenna unit 10 may be mounted on the support surface 122 through the mounting apertures 125. The depth of the assembly hole 125 is greater than the thickness of the support surface 122 and extends into the rib 124, so that the assembly hole 125 does not need to penetrate through the support surface 122, the sealing performance of the inner shell 12 is ensured, and the signal leakage or interference is avoided.

The protruding rib 124 may be disposed in a column shape, an axial direction of the protruding rib 124 is perpendicular to the supporting surface 122, and the middle heat dissipation sheet 123 is disposed on the protruding rib 124.

Wherein the heat sink 123 is disposed perpendicular to the supporting surface 122. The surface of the heat sink 123 may also be provided with protrusions or grooves to increase the heat dissipation area and improve the heat dissipation effect; the heat sink 123 may be a sheet-like material having good thermal conductivity, such as a copper sheet or an aluminum sheet.

The present application further provides an embodiment of the housing 13, as shown in fig. 3, the housing 13 includes at least three sidewalls 131 connected in sequence, the sidewalls 131 are configured to be disposed on components of the active antenna unit 10, and the housing 13 is integrally formed.

The at least three side walls 131 connected in sequence correspond to the at least three supporting surfaces 122, respectively, that is, the number of the side walls 131 is the same as that of the supporting surfaces 122, so that the side walls 131 and the supporting surfaces 122 are correspondingly disposed. A concave part 132 is arranged between two adjacent side walls 131, and the concave part 132 is abutted with the inner shell 12 of the active antenna unit 10; that is, the inner housing 12 is disposed in the outer housing 13, and the recessed portion 132 abuts against the inner housing 12, so as to form a plurality of accommodating cavities with openings at both ends and spaced from each other between the inner housing 12 and the outer housing 13, and the accommodating cavities are used for accommodating components of the active antenna unit 10. The number of the side walls 131 and the number of the supporting surfaces 122 are three, so that three accommodating cavities are formed between the inner shell 12 and the outer shell 13.

The cross-sectional shape of the recess 132 may be an arc. In other embodiments, the cross-sectional shape of the recess 132 may be triangular, rectangular, circular, or the like.

The housing 13 may be made of a plastic material including one or more of PE (Polyethylene), PP (Polypropylene), PVC (Polyvinyl Chloride), PET (Polyethylene terephthalate), PS (Polystyrene ), PA (Polyamide), PPs (polyphenylene sulfide ), PC (Polycarbonates), or PI (Polyimide Film).

In other embodiments, the housing 13 may also be made of glass fiber reinforced plastic, which not only has super corrosion resistance and impact resistance, but also has a beautifying function, and has a strong electromagnetic penetration capability.

The material of the shell 13 is plastic material; the outer shell 13 is integrally formed by extrusion, and the extrusion forming process of the outer shell 13 and the extrusion forming process of the inner shell 12 can be the same, and are not described herein again.

The housing 13 of this embodiment includes at least three side walls 131 connected in sequence, and the housing 13 is integrally formed, so that the manufacturing process of the housing 13 can be simplified, and the production cost can be saved.

The present application also provides an embodiment of the supporting cover 14, as shown in fig. 4, the supporting cover 14 includes a fixing member 141, a plurality of connecting rods 142, and at least three supporting portions 143 connected in sequence.

The fixing member 141 is disposed in a ring shape, and is used for fixing the support cover 14 to a rod (not shown), which may be a light pole, a telegraph pole, an antenna pole, or the like. For example, the fixing member 141 has a circular receiving hole, a rod passes through the receiving hole, and the fixing member 141 is fixed to the rod to fix the support cover 14 thereto.

The plurality of connecting rods 142 are radially disposed on the fixture 141, that is, the plurality of connecting rods 142 are disposed on the fixture 141, and the connecting rods 142 are used to connect the fixture 141 and the supporting portion 143. The number of the supporting portions 143 is the same as the number of the sidewalls 131 or the number of the supporting surfaces 122, for example, the supporting cover 14 includes three supporting portions 143 connected in sequence, the three supporting portions 143 are connected in sequence to form a triangle, and the fixing member 141 is disposed at the center of the triangle.

The supporting portion 143 may include a base plate 144, a first supporting plate 145 disposed on the base plate 144, and a second supporting plate 146, the first supporting plate 145 being for being disposed outside the outer case 13 of the active antenna unit 10, the second supporting plate 146 being for being disposed inside the inner case 12 of the active antenna unit 10, so that the supporting cover 14 is for supporting the inner case 12 and the outer case 13 of the active antenna unit 10. The support cover 14 may thus be used to support the inner and

outer shells

12, 13 of the active antenna element 10 to secure the active antenna element 10 to the pole.

Compared with the prior art that the antenna is fixed on the rod through the bracket, the support cover 14 of the embodiment is used for fixing the active antenna unit 10 on the rod, and the support cover 14 comprises a fixing part 141 arranged in a ring shape, a plurality of connecting rods 142 and at least three supporting parts 143 connected in sequence, so that the structure is simple, the installation is easy, and the efficiency is improved.

The present application further provides a housing 11 of the active antenna unit 10 according to an embodiment, as shown in fig. 5, the housing 11 includes an inner housing 12, an outer housing 13, and two supporting covers 14, the inner housing 12 is disposed inside the outer housing 13, for example, the inner housing 12 is sleeved inside the outer housing 13; the inner casing 12 and the outer casing 13 are disposed between the two support covers 14 to form an accommodation space; the components of the active antenna unit 10 are disposed in the accommodating space.

Wherein, the inner shell 12 is arranged in the outer shell 13, the depressed part 132 of the outer shell 13 is abutted against the inner shell 12 to form a plurality of accommodating cavities with openings at two ends and spaced from each other between the inner shell 12 and the outer shell 13, and the two supporting covers 14 are respectively covered at the openings at two ends. That is, the recessed portion 132 of the housing 13 is used to divide the accommodating space into a plurality of independent accommodating cavities, and the components of the active antenna unit 10 are disposed in the accommodating cavities.

The housing 11 of this embodiment may be provided with at least three active antenna units 10 at the same time, so as to reduce the area occupied by the active antenna units 10.

The present application provides an active antenna unit 10 of an embodiment, as shown in fig. 6, the active antenna unit 10 includes a housing 11, and a base station antenna 16, a filter assembly 15, and a power amplifier board 17 disposed within the housing 11. The housing 11 is provided with a plurality of accommodating cavities for accommodating the base station antenna 16, the filter assembly 15, and the power amplifier board 17. The filter assembly 15 receives and transmits radio frequency signals through the base station antenna 16, and the power amplification board 17 is used for power amplification of the radio frequency signals.

Specifically, the power amplifier board 17, the filter assembly 15 and the base station antenna 16 may be sequentially disposed on the supporting surface 122 of the inner case 12; the base station antenna 16 is disposed on the filter assembly 15, and the filter assembly 15 is disposed on the power amplifier board 17 for electromagnetically shielding the power amplifier board 17.

As shown in fig. 7, the base station antenna 16 includes an antenna substrate 161 and a plurality of antenna elements 162 arranged in an array on a first main surface 164 of the antenna substrate 161; the antenna substrate 161 is made of an insulating material, which may include one or more of a plastic material, an inorganic material, alumina, magnesia, aluminum hydroxide, silica, or carbon fiber.

The plurality of antenna elements 162 are arranged in an array on the first major surface 164 of the antenna substrate 161, which may include a circular array or a rectangular array; each antenna element 162 is arranged in a sheet and attached to the first major surface 164. the shape of the antenna element 162 may be rectangular, square or polygonal.

The antenna element 162 can be attached to the first main surface 164 by hot stamping, printing, coating, electroplating or pasting; since the antenna element 162 is attached to the first main surface 164, the height of the antenna element 162 with respect to the antenna substrate 161 is reduced as compared with a base station antenna of the related art, and the volume of the base station antenna 16 can be effectively reduced.

The assembly process of the base station antenna 16 may include: preparing an antenna substrate 161 of a preset size using an insulating material; the antenna element 162 is attached to a predetermined position of the first main surface 164 to obtain the base station antenna 16.

The base station antenna 16 of the present embodiment includes an antenna substrate 161 made of an insulating material and a plurality of antenna elements 162, and no additional fasteners are required, thereby reducing components and cost; in addition, the assembly process of the base station antenna 16 is simple, and the production efficiency is improved.

As shown in fig. 8, the base station antenna 16 of the present embodiment may further include a reflective layer 163, and the reflective layer 163 is attached to a second main surface 165, which is opposite to the antenna substrate 161 and the first main surface 164, that is, the reflective layer 163 may be attached to the second main surface 165 by hot stamping, printing, coating, electroplating or adhering, and the second main surface 165 and the first main surface 164 are opposite to each other. The material of the reflective layer 163 may include one or more of silver, copper, aluminum, gold, iron, chromium, manganese, or titanium; specifically, the material of the reflective layer 163 of the present embodiment is aluminum.

Wherein, the distance between the antenna element 162 and the reflective layer 163 may be one eighth wavelength of the center frequency of the base station antenna 16; the eighth wavelength is a theoretical value, and an actual distance between the antenna element 162 and the reflective layer 163 may be about one eighth wavelength, which may satisfy a corresponding radiation performance.

The reflective layer 163 is used to focus the antenna signal on the corresponding antenna element 162 to enhance the receiving capability of the base station antenna 16; the reflective layer 163 may also be used to block or shield interfering signals located on the back side of the antenna substrate 161 to avoid interference with the base station antenna 16 when receiving antenna signals.

The antenna substrate 161 may be made of a plastic material including one or more of PE, PP, PVC, PET, PS, PA, PPs, PC, or PI. The antenna element 162 is a metal material, which may include one or more of silver, copper, aluminum, gold, iron, chromium, manganese, or titanium.

Referring to fig. 9, the base station antenna 16 of the present embodiment may not be provided with the reflective layer 163; the base station antenna 16 further comprises a number of antenna ports 166 equal to the number of antenna elements 162, i.e. the number of antenna ports 166 is the same as the number of antenna elements 162; each antenna port 166 is connected to a corresponding antenna element 162.

In other embodiments, the number of the plurality of antenna ports 166 may be proportional to the number of the plurality of antenna elements 162, for example, the ratio of the number of the plurality of antenna ports 166 to the number of the plurality of antenna elements 162 is 1:3, i.e., 3 antenna elements 162 are connected to 1 antenna port 166.

A plurality of antenna ports 166 may be disposed on the second major surface 165, and a projection of the antenna ports 166 on the first major surface 164 may at least partially overlap the antenna elements 162; the projection of the antenna port 166 onto the first major surface 164 of this embodiment completely overlaps the antenna element 162. The antenna substrate 161 is provided with a plurality of through holes 167 corresponding to the number of the antenna ports 166, that is, the number of the through holes 167 is the same as the number of the antenna ports 166; the through hole 167 communicates the first main surface 164 and the second main surface 165 of the antenna substrate 161.

The base station antenna 16 further includes a plurality of conductive posts 168 respectively corresponding to the through holes 167, i.e., the number of the plurality of conductive posts 168 is the same as the number of the plurality of through holes 167; the end surface of the conductive post 168 close to the antenna element 162 is flush with the first main surface 164 of the antenna substrate 161, and the antenna element 162 is attached to the end surface of the conductive post 168.

In the assembly process of the base station antenna 16: disposing the conductive post 168 in the through hole 167 such that an end surface of the conductive post 168 on a side close to the antenna element 162 is flush with the first main surface 164 of the antenna substrate 161; the antenna element 162 is attached to the first main surface 164 of the antenna substrate 161, and since the projection of the antenna port 166 on the first main surface 164 at least partially overlaps the antenna element 162, the antenna element 162 is attached to the end surface of the conductive post 168.

The material of the conductive posts 168 may include one or more of silver, copper, aluminum, gold, chromium, manganese, or titanium, and the end surfaces of the conductive posts 168 on the side away from the antenna element 162 may be connected to the corresponding antenna ports 166.

The base station antenna 16 of the present embodiment is further connected to a filter assembly 15, and the filter assembly 15 may be disposed below the second main surface 165 of the antenna substrate 161, that is, the base station antenna 16 is disposed on the filter assembly 15, and the filter assembly 15 includes a plurality of filter ports, and the number of the plurality of filter ports is the same as the number of the plurality of antenna ports 166; each antenna port 166 is connected to a corresponding antenna element 162 and to a corresponding filter port.

The antenna port 166 and the corresponding filter port are inserted into each other in an aligned manner when the base station antenna 16 is covered on the filter assembly 15, so that the antenna element 162 of the base station antenna 16 is electrically connected to the filter unit 151 of the filter assembly 15, and is used for transmitting the radio frequency signal filtered by the filter unit 151 or receiving the radio frequency signal and transmitting the radio frequency signal to the filter unit 151 for clutter filtering.

The filter unit 151 is a cavity filter, and a substrate (not shown) is shared by a plurality of cavity filters. The substrate is a metal substrate, and the metal may be a metal such as copper or aluminum, or an alloy. The cavity filter may be a dielectric filter, and the material of the dielectric body of the dielectric filter may be a material having high dielectric constant, low loss, or the like, such as ceramic, glass, or titanate. In other embodiments, the base station antenna 16 may also be applied to other communication systems, such as a 4G communication system.

As shown in fig. 10, the filter unit 151 includes a plurality of cascaded resonant cavities 221 with one open end, a resonant rod (not shown) and a tuning screw (not shown) are disposed in the resonant cavities 221, and each resonant cavity 221, the resonant rod and the tuning screw in the cavity thereof form a resonator; the two cascaded resonant cavities 221 are connected through a window (not shown), and the two cascaded resonant cavities 221 perform signal transmission through the window; the first-stage resonator 221 and the last-stage resonator 221 are disposed at the edge for connection with the input/output port.

The filter unit 151 of the present embodiment is provided with 10 resonant cavities 221, the 10 resonant cavities 221 are arranged in three rows or three columns, and each row or each column of resonant cavities 221 is staggered with the resonant cavities 221 of the adjacent row or adjacent column.

The filter assembly 15 of this embodiment includes 4 substrates, the filter units 151 on each substrate are arranged in two rows or two columns, and the resonant cavities 221 of the filter units 151 in each row or each column are arranged identically

Of course, in other embodiments, the number of substrates is not limited; the number of filter cells on the substrate is not limited; the number and arrangement mode of resonant cavities in the filter unit are not limited; it is also not limited whether the plurality of filter cell structures are identical, etc. Wherein the cavity 221 opens towards the base station antenna 16.

The filter unit 151 of this embodiment includes a filtering channel to implement unidirectional signal transmission. In other embodiments, the filter unit may be replaced with a filter unit including a signal receiving channel and a signal transmitting channel, so that one filter unit can simultaneously implement transceiving of signals. Of course, it is also possible to arrange multiple filter channels in one filter unit, divide the resonators in the filter unit into multiple arrangements to form multiple filter channels, then connect the multiple filter channels using a common cavity, and so on.

As shown in fig. 11, a partition plate assembly 23 is protrudingly disposed on one side of the filter assembly 15 close to the power amplifier board 17, the partition plate assembly 23 is used for forming a clearance groove 24, and the clearance groove 24 is used for accommodating components on the power amplifier board 17.

Wherein the baffle assembly 23 may be integrally formed with the filter assembly 15; the diaphragm assembly 23 may be formed by stamping, CNC or injection molding.

The partition plate assembly 23 includes a first partition plate 231 disposed on the outer periphery of the filter assembly 15 near the power amplifier board 17, and a plurality of second partition plates 232 and third partition plates 233 disposed in the first partition plate 231; the outer surface of the first partition 231 is flush with the side of the filter assembly 15, the inner surface of the first partition 231 is connected to the second partition 232 and the third partition 233, the third partition 233 is equally divided and perpendicular to the second partition 232, and the third partition 233 is perpendicular to one side of the first partition 231, so that the formed avoiding groove 24 is rectangular.

In other embodiments, the shape of the avoiding groove 24 formed by the partition plate assembly 23 can also be oval, hexagonal, etc.; it is not limited whether the shape of each avoiding groove 24 is the same or not, the specific shape of the avoiding groove 24 is related to the layout of the components on the power amplification board 17, and the avoiding groove 24 should be able to accommodate the components on the power amplification board 17.

The first partition plate 231, the second partition plate 232 and the third partition plate 233 are flush with one end surface of the power amplifier board 17, so that the filter assembly 15 can be stably installed on the power amplifier board 17, electromagnetic leakage of the power amplifier board 17 can be reduced, and electromagnetic shielding performance of the power amplifier board 17 is improved.

The filter assembly 15 of this embodiment includes 4 sets of filter assemblies 15, each set of filter assemblies 15 includes 16 filter units 151 arranged in two rows, and the partition assembly 23 forms 16 avoiding slots 24 on one side of the filter assembly 15 close to the power amplifier board 17 to accommodate components on the power amplifier board 17, respectively.

Different from the prior art, in the active antenna unit 10 of the present embodiment, the power amplifier board 17, the filter component 15 and the base station antenna 16 are integrated in the accommodating cavity, so that the integration level of the active antenna unit 10 can be improved, and the integration level requirement of the 5G communication system can be met.

The inner housing 12 of the above-mentioned embodiment is provided with three supporting surfaces 122, and the outer housing 13 is provided with three side walls 131, so the active antenna unit 10 can transmit and receive signals from three directions, realize multi-directional antenna radiation, increase signal coverage, and improve performance. In addition, the inner casing 12 can form a tunnel effect to dissipate heat through the inner cavity of the inner casing 12 without providing a cooling structure additionally. Therefore, the structure of the active antenna unit 10 can be further simplified, which is advantageous for a compact design.

The present application provides another embodiment of an active antenna unit that differs from the active antenna unit 10 described above in that: as shown in fig. 12, the active antenna unit further includes a power board 18, and the power board 17 and the power board 18 are respectively projected onto the partition assembly to obtain a first projection and a second projection, where the first projection and the second projection are spaced apart, that is, the power board 17 and the power board 18 are spaced apart. The avoiding groove is used for accommodating components on the power amplification board 17 and the power supply board 18, namely, the power amplification board 17 and the power supply board 18 are arranged on one side of the partition board assembly, which is far away from the filter assembly 15. The power panel 18 is used for supplying power to the power amplification panel 17, so that the integration level of the active antenna unit is further improved, and the integration level requirement of a 5G communication system can be met.

In other embodiments, the power board 17 and the power board 18 may be disposed on the same circuit board to reduce the space occupied by the power board 17 and the power board 18.

The present application provides another embodiment of an active antenna unit that differs from the active antenna unit 10 described above in that: as shown in fig. 13, the outer surface of the cylinder is provided with four supporting surfaces, and the cross section of the cylinder is square; the housing is provided with four side walls 531 and the support cover 54 comprises four support portions connected in series. The active antenna unit of this embodiment can follow four directions receiving and dispatching signals, realizes diversified antenna radiation, increases the signal coverage, improves the performance.

The present application provides another embodiment of an active antenna unit that differs from the active antenna unit 10 described above in that: as shown in fig. 14, the inner case is provided with six support surfaces, and the cross-sectional shape of the inner case is hexagonal; the housing is provided with six side walls 631 and the support cover 64 comprises six support portions connected in series. The active antenna unit of this embodiment can follow six directions receiving and dispatching signals, realizes diversified antenna radiation, increases the signal coverage, improves the performance.

As shown in fig. 15, the street lamp antenna 70 of the present invention at least includes a lamp post 71 and an active antenna unit 72, the active antenna unit may be the active antenna unit disclosed in the above embodiments, the lamp post 71 is a rod of the above embodiments, and a supporting cover is used to fix the active antenna unit 72 on the lamp post 71.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. The utility model provides an active antenna unit's inner shell, its characterized in that, the inner shell includes integrated into one piece's barrel, the surface of barrel includes at least three holding surface, the holding surface is used for setting up active antenna unit's components and parts.

2. An inner casing according to claim 1, wherein the inner surface of the barrel is provided with fins.

3. A housing for an active antenna unit, characterized in that the housing comprises an outer shell and an inner shell according to any one of claims 1-2, which inner shell is arranged inside the outer shell.

4. The housing of claim 3, wherein the shell comprises at least three sequentially connected sidewalls, the at least three sequentially connected sidewalls corresponding to the at least three support surfaces, respectively.

5. The housing according to claim 4, wherein a recess is disposed between two adjacent sidewalls, the recess abuts against the inner shell to form a plurality of receiving cavities with two open ends and spaced from each other between the inner shell and the outer shell, and the receiving cavities are used for receiving components of the active antenna unit.

6. The housing of claim 5, wherein the housing includes two support covers disposed over the opening.

7. An active antenna unit, comprising a housing as claimed in any one of claims 3 to 6, and a base station antenna, a filter assembly and a power amplifier board disposed in the housing, wherein the base station antenna is covered above the filter assembly, the power amplifier board is disposed on a side of the filter assembly away from the base station antenna, the filter assembly receives and transmits a radio frequency signal through the base station antenna, and the power amplifier board is configured to perform power amplification on the radio frequency signal.

8. The active antenna unit of claim 7, wherein the base station antenna comprises an antenna substrate and a plurality of antenna elements arranged in an array on a first major surface of the antenna substrate.

9. The active antenna unit of claim 8, wherein the base station antenna further comprises a plurality of antenna ports equal to or proportional to the number of antenna elements, each antenna port being connected to a corresponding antenna element and to a corresponding filter port of the filter assembly.

10. The active antenna unit of claim 7, wherein a partition assembly protrudes from a side of the filter assembly close to the power amplifier board, the partition assembly is used to form a clearance groove, and the clearance groove is used to accommodate components on the power amplifier board.