CN212062698U - Antenna device and indoor distribution system - Google Patents
Antenna device and indoor distribution system Download PDFInfo
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- CN212062698U CN212062698U CN202020765833.8U CN202020765833U CN212062698U CN 212062698 U CN212062698 U CN 212062698U CN 202020765833 U CN202020765833 U CN 202020765833U CN 212062698 U CN212062698 U CN 212062698U
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Abstract
The present disclosure relates to an antenna device and an indoor distribution system. The antenna device includes: a first layer of antenna structures and a second layer of antenna structures disposed along a central axis of the antenna device; the first layer of antenna structure comprises a first antenna unit and a second antenna unit, and the second layer of antenna structure is a third antenna unit; the first antenna element includes: the oscillator works in a first polarization direction of a preset frequency band; the second antenna unit includes: the omnidirectional antenna oscillator works on at least one frequency band different from the preset frequency band; the third antenna unit includes: the oscillator works in a second polarization direction of the preset frequency band; the second polarization direction is perpendicular to the first polarization direction. The antenna device design of the present disclosure enhances 5G coverage capability, and balances 2G, 4G, and 5G coverage.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to an antenna apparatus and an indoor distribution system.
Background
With the development of 5G mobile communication technology in China, the requirements of people on wireless communication quality are higher and higher, more than 70% of data services occur indoors, and the construction of an indoor coverage system is particularly important and urgent. The performance of the ceiling antenna of the indoor coverage system directly influences the indoor distribution effect and the engineering construction cost.
At present, the conventional antenna can only support single-polarized and dual-polarized omnidirectional ceiling antennas of 800M-2700M, but cannot support 3300-3600M frequency bands of 5G.
Disclosure of Invention
The inventor finds that: in order to meet the arrival of the 5G era, it is necessary to design a new high-integration indoor antenna device capable of supporting both the existing 2G, 3G or 4G frequency bands and the 5G frequency band dual-Input Multi-Output (MIMO) signal access.
One technical problem to be solved by the present disclosure is: a new antenna device capable of supporting multiple frequency bands and supporting two-way MIMO signal access is provided.
According to an aspect of the present disclosure, there is provided an antenna apparatus including: a first layer of antenna structures and a second layer of antenna structures disposed along a central axis of the antenna device; the first layer of antenna structure comprises a first antenna unit and a second antenna unit, and the second layer of antenna structure is a third antenna unit; the first antenna element includes: the oscillator works in a first polarization direction of a preset frequency band; the second antenna unit includes: the omnidirectional antenna oscillator works on at least one frequency band different from the preset frequency band; the third antenna unit includes: the oscillator works in a second polarization direction of the preset frequency band; the second polarization direction is perpendicular to the first polarization direction.
In some embodiments, the second antenna unit further comprises a reflector plate, wherein the reflector plate is disc-shaped; the central line of the reflecting plate is superposed with the central axis of the antenna device.
In some embodiments, the second antenna element further comprises a first insulating support member, wherein: the omnidirectional antenna oscillator is a cylindrical cavity; the omnidirectional antenna oscillator is arranged on the reflecting plate through a first insulating supporting component.
In some embodiments, the omnidirectional antenna element is a hollow cylindrical cavity; the wall of the cylindrical cavity is provided with a U-shaped groove.
In some embodiments, the antenna apparatus further comprises: a radio frequency coaxial line, wherein: the outer conductor of the radio frequency coaxial line is connected with the top of the reflecting plate; and the inner conductor of the radio-frequency coaxial line is connected with the omnidirectional antenna oscillator and used for feeding the omnidirectional antenna oscillator.
In some embodiments, the third antenna element further comprises a second insulative support member and a first printed circuit board, PCB, substrate, wherein: the oscillator in the second polarization direction is arranged on one surface of the first PCB substrate, which is back to the reflecting plate; the other surface of the first PCB substrate is provided with a micro-strip feeder line for feeding the oscillator in the first polarization direction; the first PCB substrate is arranged on the wall of the cylindrical cavity of the omnidirectional antenna oscillator through a second insulating support component.
In some embodiments, the vibrators in the second polarization direction are multiple and arranged at equal intervals along the circumferential direction of the first PCB substrate; the oscillator in the second polarization direction is a microstrip line oscillator; the second polarization direction is a horizontal polarization direction.
In some embodiments, the first PCB substrate is a disk; the number of the vibrators in the second polarization direction is 6, and the vibrators are respectively arranged on the radial axes with the included angles of 60 degrees on the disc.
In some embodiments, the vibrators of the second polarization direction are divided into 3 groups; the microstrip feeder lines are divided into 3 groups and are respectively arranged at the positions of the other surface of the first PCB substrate corresponding to the vibrators in the second polarization direction.
In some embodiments, the first polarization direction dipole is a metal sheet; the oscillator in the first polarization direction is fixed at the center of the first PCB substrate.
In some embodiments, the first polarization direction vibrator is a trapezoidal metal sheet; the upper part of the trapezoid metal sheet is wide and the lower part of the trapezoid metal sheet is narrow; the first polarization direction is a vertical polarization direction.
In some embodiments, the trapezoidal metal sheet includes a lower edge extension portion that fixes the first polarization-direction vibrator at the center of the first PCB substrate; the middle of the lower part of the trapezoidal metal sheet is provided with a feeder line welding spot, and the antenna is fed by a radio frequency coaxial line.
In some embodiments, the antenna apparatus further comprises: a tuner fixed to the reflection plate; the tuner is used for improving the performance of the antenna element.
In some embodiments, the antenna apparatus further comprises: the antenna house, with the bottom that antenna house detachable is connected, with the installation piece that the bottom is connected.
In some embodiments, the antenna apparatus further comprises: a radio frequency active unit and a direct current feeder; the radio frequency active unit is arranged behind the reflecting plate along the central axis of the antenna device in the direction from the top of the antenna housing to the bottom of the antenna housing; the bottom of the antenna housing is one side of an opening of the antenna housing; one end of the direct current feeder is connected with the radio frequency active unit and used for feeding power to the radio frequency active unit; and a hole is formed in the bottom cover, and the direct current feeder enters the interior of the antenna housing through the hole.
In some embodiments, the preset frequency band comprises: 5G frequency band.
According to another aspect of the present disclosure, there is provided an indoor distribution system including an antenna device as described in any of the above embodiments.
The antenna arrangement in the present disclosure comprises a first layer of antenna structures and a second layer of antenna structures arranged along a central axis of the antenna arrangement; the first layer of antenna structure comprises a first antenna unit and a second antenna unit, and the second layer of antenna structure is a third antenna unit; the first antenna element includes: the oscillator works in a first polarization direction of a preset frequency band; the second antenna unit includes: the omnidirectional antenna oscillator works on at least one frequency band different from the preset frequency band; the third antenna unit includes: the oscillator works in a second polarization direction of the preset frequency band; the second polarization direction is perpendicular to the first polarization direction. The scheme of the disclosure is suitable for a 5G scene, the preset frequency band can be set to be 5G, the antenna device comprises two antenna units supporting 5G, the polarization directions of oscillators in the two antenna units are mutually perpendicular, and the antenna device further comprises an omnidirectional antenna oscillator supporting at least one frequency band except 5G. Therefore, the antenna device disclosed by the invention can support 5G two-way MIMO signal access, and support the omnidirectional coverage of signals of at least one frequency band of 2G, 3G and 4G, so that the 5G coverage capability is enhanced, and the signal coverage of different systems is balanced. The polarization isolation between the three antenna units is improved by the different polarization directions adopted by the three antenna units, the interference between the antenna units is reduced, and the signal transmission quality is improved. In addition, the two antenna units are independently arranged without combining with the existing 2G, 3G or 4G antenna units, so that the arrangement of the combiner can be reduced.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of some embodiments of an antenna apparatus according to the present disclosure.
Fig. 2 is a schematic structural diagram of another embodiment of an antenna apparatus according to the present disclosure.
Fig. 3 is a schematic structural diagram of some embodiments of a second antenna unit of the present disclosure.
Fig. 4a and 4b are schematic diagrams of some embodiments of a third antenna element of the present disclosure.
Fig. 5a illustrates a graph of simulation results for a first antenna element coverage of some embodiments of the present disclosure.
Fig. 5b illustrates a graph of simulation results for coverage of a third antenna element according to some embodiments of the present disclosure.
Fig. 6a, 6b and 6c are schematic diagrams of some embodiments of a first antenna element of the present disclosure.
Fig. 7a and 7b are schematic external views of further embodiments of the antenna device of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The present disclosure provides an antenna arrangement, described below in conjunction with fig. 1.
Fig. 1 is a schematic structural diagram of some embodiments of an antenna apparatus according to the present disclosure. As shown in fig. 1, the antenna device 10 includes: a first layer antenna structure 100 and a second layer antenna structure 200 disposed along a central axis of the antenna device 10, wherein:
the first layer antenna structure 100 includes a first antenna element 110 and a second antenna element 120, and the second layer antenna structure 200 is a third antenna element 210.
The first antenna element 110 may include: and a vibrator 112 operating in a first polarization direction of a preset frequency band. In some embodiments, the predetermined frequency band may be a 5G frequency band, for example, a 3.5GHz frequency band or 3300-.
The second antenna unit 120 may include: an omnidirectional antenna element 122 operating in at least one frequency band different from the predetermined frequency band. In some embodiments, when the preset frequency band is a 5G frequency band, the at least one frequency band different from the preset frequency band is, for example, at least one of 2G, 3G and 4G frequency bands.
The third antenna unit 210 may include: a vibrator 212 operating in a second polarization direction of the preset frequency band; the second polarization direction is perpendicular to the first polarization direction. For example, the first polarization direction is, for example, a vertical polarization direction, and the second polarization direction is, for example, a horizontal polarization direction, and is not limited to the illustrated example.
The center of the first antenna element 110, the center of the third antenna element 210, and the center of the second antenna element 120 may be located on the central axis of the antenna device 10.
The scheme of the above embodiment is applicable to a 5G scene, and the preset frequency band may be set to 5G, then the antenna device includes two antenna units supporting 5G, and polarization directions of elements in the two antenna units are perpendicular to each other, and further includes an omnidirectional antenna element 122 supporting at least one frequency band other than 5G. Therefore, the antenna device of the above embodiment can support 5G two-way MIMO signal access, and support omnidirectional coverage of signals of at least one frequency band of 2G, 3G, and 4G, thereby enhancing 5G coverage capability, and equalizing signal coverage of different systems. The polarization isolation between the three antenna units is improved by the different polarization directions adopted by the three antenna units, the interference between the antenna units is reduced, and the signal transmission quality is improved. In addition, the two antenna units are independently arranged without combining with the existing 2G, 3G or 4G antenna units, so that the arrangement of the combiner can be reduced.
The embodiment of the disclosure adopts a bowl-shaped middle-low frequency oscillator design, and the 5G vertical oscillator and the 4G oscillator are multiplexed into a space, so that a two-layer antenna structure of a 5G vertical oscillator/4G oscillator +5G horizontal oscillator is formed. The embodiment of the disclosure adopts a small-size edge coverage enhancement type multimode multi-mode broadband antenna, and designs a high-integration edge coverage enhancement type multimode multi-mode broadband indoor distribution antenna. The embodiment of the disclosure greatly facilitates engineering implementation, improves the appearance of the antenna, and reduces the volume of the antenna.
Some specific embodiments of the antenna arrangement of the present disclosure are described below in conjunction with fig. 2-7.
Fig. 2 is a schematic structural diagram of another embodiment of an antenna apparatus according to the present disclosure. The antenna device includes: a first layer of antenna structures and a second layer of antenna structures disposed along a central axis of the antenna device, wherein: the first layer of antenna structure comprises a first antenna unit and a second antenna unit, and the second layer of antenna structure is a third antenna unit.
As shown in fig. 2, the first antenna element may include elements 112 operating in a first polarization direction of a predetermined frequency band. In some embodiments, the predetermined frequency band may be a 5G frequency band, for example, a 3.5GHz frequency band or 3300-.
As shown in fig. 2, the second antenna unit may include: an omnidirectional antenna element 122 operating in at least one frequency band different from the predetermined frequency band. In some embodiments, when the preset frequency band is a 5G frequency band, the at least one frequency band different from the preset frequency band is, for example, at least one of 2G, 3G and 4G frequency bands.
As shown in fig. 2, the third antenna unit includes: a vibrator 212 operating in a second polarization direction of the preset frequency band; the second polarization direction is perpendicular to the first polarization direction. For example, the first polarization direction is, for example, a vertical polarization direction, and the second polarization direction is, for example, a horizontal polarization direction, and is not limited to the illustrated example.
In the above embodiments of the present disclosure, the element 112 and the omnidirectional antenna element 122 in the first polarization direction are spatially multiplexed, and a "5G vertical element/4G element +5G horizontal element" two-layer antenna structure is obtained.
The embodiments of the present disclosure provide a small-sized edge coverage enhanced multimode multi-mode broadband antenna. The antenna comprises a medium-low frequency antenna unit and 3.5GHz (two-path dual polarization).
The antenna device of the above-mentioned embodiment of this disclosure comprises 2/3/4G antenna element and metal reflection bottom plate, 5G horizontal polarization oscillator and 5G vertical polarization oscillator triplex, and 2/3/4G signal and 5G double-circuit MIMO signal are connected respectively to three antenna element, need not additionally to increase the combiner, utilizes special structural design simultaneously, guarantees high polarization isolation between the three antenna element, reduces the interference between the antenna.
In the 5G vertical polarization part of the above-mentioned embodiment of the present disclosure, the 5G vertical polarization antenna element is implemented by an independent metal sheet, and the antenna is a vertical polarization omnidirectional antenna, which is light in weight, simple in structure and capable of metal mold opening.
In the 5G horizontal polarization structure of the above embodiment of the present disclosure, the 5G horizontal polarization antenna element is formed by one printed board, the Top layer is 3 sets of symmetric microstrip lines, and an included angle between each two microstrip lines is 120 degrees, so that the problems of uneven edge coverage of the existing indoor signal and low gain of a directional diagram of 85 degrees (room division edge coverage position) are solved, and the Bot layer is a feed network.
The medium-low frequency omnidirectional antenna of the embodiment of the disclosure is composed of a metal oscillator, a metal reflection bottom plate, an L-shaped metal tuner and a feeder line fixing support.
According to the antenna structure disclosed by the embodiment, the medium-low frequency antenna and the 2 3.5GHz antennas are integrated at the same time, the phenomenon that the frequency span of a single oscillator is too large is avoided, and the radiation performance of the antenna is ensured.
The bowl-shaped antenna oscillator structure is designed in the embodiment of the disclosure, the structural space is fully utilized, and the whole volume is equivalent to that of a medium-low frequency antenna.
Some embodiments of the second antenna element of the present disclosure are described below in conjunction with fig. 2 and 3.
Fig. 3 is a schematic structural diagram of some embodiments of a second antenna unit of the present disclosure. As shown in fig. 2 and 3, the second antenna unit 120 may further include a reflective plate 121, wherein the reflective plate 121 has a disc shape; the center line of the reflector plate 121 coincides with the center axis of the antenna device.
In some embodiments, the reflective plate 121 is a metal reflective backplane.
In some embodiments, the reflective plate 121 may be used as a reflective plate for the omnidirectional antenna element 122 of the second antenna element, the element 112 of the first polarization direction of the first antenna element, the element 212 of the second polarization direction of the third antenna element, and three antenna elements.
In some embodiments, as shown in fig. 2 and 3, the omnidirectional antenna element 122 is a hollow cylindrical cavity ("bowl"); the wall of the cylindrical cavity (bowl wall) is provided with a U-shaped groove 127. The number of the slots can be designed according to the actual design requirement.
In some embodiments, as shown in fig. 2 and 3, the omnidirectional antenna element 122 is shaped like a "bowl", and a center line of the omnidirectional antenna element 122 coincides with a center line of the metal reflective base plate 121.
The U-shaped groove 127 is formed in the embodiment of the present disclosure, so that electromagnetic field distribution can be improved, and indoor signal distribution is more uniform.
In some embodiments, as shown in fig. 2 and 3, the second antenna unit 120 may further include a first insulating support member 123, wherein: the omnidirectional antenna element 122 is a cylindrical cavity; the omnidirectional antenna element 122 is disposed on the reflection plate 121 through a first insulating support member 123.
In some embodiments, as shown in fig. 2 and 3, the first insulating support member 123 may be implemented as an L-shaped metal tuner and a feeder fixing bracket.
In some embodiments, as shown in fig. 2 and 3, the metal omnidirectional antenna element 122 and the metal reflective bottom plate 121 are connected together by an L-shaped metal tuner and a feeder bracket, and are fastened by a metal nut.
In some embodiments, the number of the L-shaped metal tuner and the feeder fixing bracket is three, which are used for fixing the "bowl" shaped antenna element and the metal reflection bottom plate, and two of the L-shaped metal tuner and the feeder fixing bracket are used for fixing the feeding wires of the 5G horizontally and vertically polarized antenna (the element 112 in the first polarization direction and the element 212 in the second polarization direction).
In some embodiments, as shown in fig. 2, the first feed line 124 is a feed line for the omnidirectional antenna element 123, the second feed line 114 is a feed line for the first polarization element 112, and the third feed line 214 is a feed line for the second polarization element 212.
In some embodiments, the feed line of the omnidirectional antenna element 123 is fed using a radio frequency coaxial line, i.e. a radio frequency coaxial line, wherein: the outer conductor of the radio frequency coaxial line is connected with the top of the reflecting plate 121; the inner conductor of the radio frequency coaxial line is connected to the omnidirectional antenna element 122 and is used for feeding the omnidirectional antenna element 122.
In some embodiments, as shown in fig. 2 and 3, the second antenna unit may further include: a tuner 125 fixed to the reflection plate 121.
In some embodiments, the tuner 125 may be an L-shaped metal tuner for improving antenna element performance.
In some embodiments, the number of tuners 125 is 3.
In some embodiments, the L-shaped metal tuner may be implemented as an impedance matching circuit for selecting circuit elements having matched impedance values to improve the performance of the circuit.
In some embodiments, as shown in fig. 2 and 3, the second antenna unit may further include: screw holes 126. As shown in fig. 2 and 3, the edge of the metal reflector plate 121 is designed with three screw holes 126 for fixing the whole antenna and the remote active unit.
The second antenna unit of the embodiment of the disclosure is convenient to process by adopting the bowl-shaped antenna oscillator, has low cost and can be formed in one step by using a stamping mode; the embodiment of the disclosure adopts a metal oscillator mode, and the electrical property and the radiation property are good.
Some embodiments of the third antenna element of the present disclosure are described below in conjunction with fig. 2, 4a, 4b, 5a, and 5 b.
Fig. 4a and 4b are schematic diagrams of some embodiments of a third antenna element of the present disclosure. As shown in fig. 2, 4a and 4b, the third antenna element 210 has a disk shape.
As shown in fig. 2, 4a and 4b, the third antenna unit of the present disclosure may include a first printed circuit board PCB substrate 211, an element 212 of a second polarization direction, and a second insulating support member 213. Fig. 4a shows the front side (TOP side, side facing away from the reflector plate 121) of the first PCB substrate 211, and fig. 4b shows the back side (BOTTOM side, side facing the reflector plate 121) of the first PCB substrate 211.
In some embodiments, the first PCB substrate 211 is circular.
As shown in fig. 2 and 4a, the vibrator 212 with the second polarization direction is disposed on a surface of the first PCB substrate facing away from the reflection plate 121.
In some embodiments, as shown in fig. 2 and 4a, the vibrators 212 in the second polarization direction are multiple and are arranged at equal intervals along the circumferential direction of the first PCB substrate; the oscillator 212 in the second polarization direction is a microstrip line oscillator; the second polarization direction is a horizontal polarization direction.
In some embodiments, as shown in fig. 2 and 4a, the number of the vibrators 212 in the second polarization direction is 6, and the vibrators are respectively arranged on radial axes of the disk, which are mutually included at an angle of 60 degrees. In some embodiments, as shown in fig. 4a, the dipoles 212 of the second polarization direction are patterned on a first PCB substrate 211. The pattern of the six tentacles that protrude out is the placement of the vibrators 212 of the second polarization direction, and the middle hexagonal part is provided with devices that guide electromagnetic waves to the vibrators on the six tentacles.
In some embodiments, as shown in fig. 2 and 4a, the elements 212 of the second polarization direction are divided into 3 groups; the oscillator 212 in the second polarization direction is composed of three groups of microstrip line oscillators symmetric with the center of a circle.
In some embodiments, as shown in fig. 4b, the BOTTOM surface (the surface facing the reflective plate 121) of the first PCB substrate 211 is provided with a microstrip feed line 216 for feeding the oscillator 212 with the second polarization direction. The BOTTOM surface of the first PCB substrate 211 is a feed network, and the feed line is fed by a radio frequency coaxial line.
In some embodiments, as shown in fig. 4b, the microstrip feed lines are divided into 3 groups, and are respectively disposed at positions corresponding to the vibrators 212 in the second polarization direction on the other side of the first PCB substrate. As shown in fig. 4b, 3 sets of microstrip feed lines are arranged with their centers at an angle of 120 ° with each other.
In some embodiments, the inner conductor of the radio frequency coaxial line is connected to a corresponding pad of the microstrip feed line for feeding the oscillator 212 of the second polarization direction. The outer conductor of the radio frequency coaxial line may be connected to a reflection plate or grounded.
The oscillator 212 and the microstrip feed line in the second polarization direction are designed to solve the problems that the coverage of the edge of the existing indoor signal is not uniform, and the gain of the coverage position (for example, 85 DEG of a directional diagram) of the edge of the indoor signal is low. The inventors simulated the coverage of the 5G signal and fig. 5a shows a graph of the simulation results of the coverage of the first antenna element of some embodiments of the present disclosure. Fig. 5a shows a directional diagram of the first antenna element 110 (vertical polarization direction), wherein the H-plane represents the magnetic plane parallel to the magnetic field direction and the E-plane represents the electrical plane parallel to the electric field direction. Fig. 5b illustrates a graph of simulation results for coverage of a third antenna element according to some embodiments of the present disclosure. The third antenna element 210 (horizontally polarized) directional diagram is shown in fig. 5b, where the H-plane represents the magnetic plane and the E-plane represents the electrical plane. It can be seen from the figure that the maximum gain direction of the antenna arrangement of the present disclosure ranges from-60 deg. to-85 deg. at the edges. The above embodiments of the present disclosure may satisfy the optimal requirement for gain in the edge coverage direction in each indoor scene
In some embodiments, as shown in fig. 2, 4a and 4b, the third antenna element of the present disclosure may further include a notch 215 designed at an edge of the first PCB substrate 211.
In some embodiments, as shown in fig. 2, the first PCB substrate 211 may be disposed on the cylindrical cavity wall of the omnidirectional antenna element 122 through a gap 215 and a second insulating support member 213.
In some embodiments, the second insulating support member 213 may be implemented as three plastic snaps. The edge of the first PCB substrate 211 is designed with a notch, and can be fixed on the wall of the cylindrical cavity of the 2G/3G/4G omnidirectional antenna oscillator through three plastic buckles.
In some embodiments, as shown in fig. 2, 4a and 4b, the central aperture 127 of the first PCB substrate 211 is used for mounting a first antenna element (first polarization transducer 112). Thereby making the structure of the whole antenna device more compact.
Some embodiments of the first antenna element of the present disclosure are described below in conjunction with fig. 2, 6a, 6b and 6 c.
Fig. 6a, 6b and 6c are schematic diagrams of some embodiments of a first antenna element of the present disclosure. As shown in fig. 2, 6a, 6b and 6c, the first polarization direction transducer 112 is a metal plate; the vibrator 112 in the first polarization direction is fixed at the center of the first PCB substrate; the first polarization direction is a vertical polarization direction.
In some embodiments, as shown in fig. 6a and 6b, the first polarization direction vibrator 112 is a trapezoidal metal sheet; the upper part of the trapezoid metal sheet is wider than the lower part of the trapezoid metal sheet is narrower.
In some embodiments, as shown in fig. 2, 6a, and 6b, the trapezoid-shaped metal sheet includes a lower edge extension 111, and the lower edge extension 111 fixes the first polarization-direction vibrator 112 at the center of the first PCB substrate; the middle part 113 of the lower part of the trapezoid metal sheet is a feeder welding spot, and the antenna is fed by a radio frequency coaxial line.
The metal sheet disclosed by the embodiment of the disclosure has the advantages of light weight, capability of opening the die, low cost, high reliability and convenience in installation.
The antenna device of the above-mentioned embodiment of this disclosure comprises four bibliographic bases, second antenna element (2/3/4G antenna element), third antenna element (5G horizontal polarization oscillator) and first antenna element (5G vertical polarization oscillator), realizes high polarization isolation between the three antenna elements of special design, and whole antenna height is lower simultaneously, can satisfy dual polarization antenna height size requirement.
The 2/3/4G antenna element of the above-mentioned embodiment of this disclosure is "bowl" shape, and the bowl wall is opened U type groove 127 design.
The metal reflective backplane of the above-described embodiments of the present disclosure has an L-tuner thereon for improving the performance of the antenna element.
The metal reflection bottom plate and the metal oscillator of the above-mentioned embodiment of the present disclosure are connected through the L-type tuner and the feeder fixing bracket.
The 5G vertical polarization antenna element of the above embodiments of the present disclosure realizes a vertical polarization omnidirectional antenna by an independent metal sheet.
The 5G horizontal polarization antenna oscillator of the embodiment of the disclosure is composed of a PCB, the top layer is composed of three groups of microstrip lines symmetrical around the circle center, the included angle between every two microstrip lines is 120 degrees, the Bot layer is a microstrip line feed network, and the antenna gain is uniform.
Fig. 7a and 7b are schematic external views of further embodiments of the antenna device of the present disclosure. As shown in fig. 7a and 7b, the antenna device 10 of the present disclosure may further include: the radome 300 may have a shape of a radome of a conventional indoor ceiling antenna, as shown in fig. 7a and 7b, or may have another shape.
Further, the antenna device 10 may further include: and a bottom cover 400 detachably coupled to the radome 300. For example, the radome 300 and the bottom cover 400 may be provided with a snap member to couple the two. A hole may be provided in the bottom cover 400, and a cable for feeding may be inserted through the hole to supply power to each antenna unit. A heat dissipation structure may be further provided on the bottom cover 400.
Further, the antenna device 10 may further include: the mounting plate 500 coupled to the bottom cover 400 facilitates mounting of the antenna device on a wall or ceiling. The antenna device 10 may support mounting means such as hanging, pole (optional), etc.
For example, as shown in fig. 1 or fig. 2, the first layer antenna structure 100 (including the first antenna unit 110 and the second antenna unit 120) and the second layer antenna structure 200 (being the third antenna unit 210) may be sequentially disposed at an interval from the radome 300 toward the bottom cover 400 along the central axis of the antenna device 10.
In some embodiments, as shown in fig. 7a and 7b, the antenna device 10 further comprises: a radio frequency active unit and a dc feed 600. The rf active unit is disposed behind the reflection plate 121 along the central axis of the antenna device in a direction from the top of the radome to the bottom thereof. The radio frequency active unit includes, for example, an amplifier and the like. One end of the dc feeder 600 is connected to the rf active unit for feeding the rf active unit. The dc feed line 600 may enter the inside of the radome 300 through a hole in the bottom cover 400.
In some embodiments, as shown in fig. 7a and 7b, the antenna device 10 further comprises: and the radio-frequency coaxial line 700 is used for feeding the three antenna elements. The rf coaxial cable 700 may also enter the radome 300 through a hole in the bottom cover 400. The direct current feeder 600 and the radio frequency coaxial line 700 are provided with joints, so that the installation is convenient.
In some embodiments, the overall dimensions of the antenna assembly 10 are about 123mm in height, about 224mm in chassis diameter, and about 2.4L in volume.
The embodiment of the disclosure designs a small-size multi-frequency multi-mode antenna with high integration degree, which comprises an 2/3/4G antenna and a two-way MIMO antenna element, and can support 2/3/4G and two-way MIMO signals to be respectively accessed.
The small-size multi-frequency multi-mode antenna and the far-end radio frequency active unit designed by the embodiment of the invention are integrated, the original passive room branch head end antenna is directly replaced in a 5G frequency conversion room decomposition solution, and the installation is convenient and rapid.
The small-size multi-frequency multi-mode antenna designed by the embodiment of the disclosure supports 5G signal edge coverage enhancement, and enables 2G/3G/4G/5G coverage to be balanced.
The antenna device design of the above embodiments of the present disclosure enhances the 5G coverage capability, and balances the 2G, 4G, and 5G coverage.
The antenna device design structure of the embodiment of the disclosure is beneficial to improving the out-of-roundness of the horizontal plane directional diagram of the antenna and enables the coverage to be more uniform.
The antenna device of the embodiment of the disclosure has the advantages of high integrated design, high reliability, low cost and batch production.
The antenna device of the above embodiment of the present disclosure is designed for indoor distribution systems, and highly integrates 2/3/4G and 5G antennas and a radio frequency active unit, and is small in size and light in weight.
The antenna device disclosed by the embodiment of the disclosure is specially designed for an indoor distribution system, and a far-end active unit and an antenna integrated device can directly replace an original indoor distribution passive antenna, so that the installation is convenient and rapid.
The antenna device of the above-mentioned embodiment of this disclosure can be used to the indoor distribution of 5G and reform transform the scene, and the space of active radio frequency part has been reserved in the product design simultaneously, can be used to active room branch system of 5G, especially frequency shift room branch system.
According to another aspect of the present disclosure, there is provided an indoor distribution system comprising an antenna arrangement as described in any of the embodiments above (e.g. any of the embodiments of fig. 1-3, 4a, 4b, 6a, 6b, 7a and 7 b).
The indoor distribution system adopts the small-size edge coverage enhancement type indoor multi-mode multi-system omnidirectional ceiling antenna, so that the 5G coverage capability of the indoor distribution system is enhanced, and 2G, 4G and 5G coverage is balanced.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (16)
1. An antenna device, comprising:
a first layer of antenna structures and a second layer of antenna structures disposed along a central axis of the antenna device;
the first layer of antenna structure comprises a first antenna unit and a second antenna unit, and the second layer of antenna structure is a third antenna unit;
the first antenna element includes: the oscillator works in a first polarization direction of a preset frequency band;
the second antenna unit includes: the omnidirectional antenna oscillator works on at least one frequency band different from the preset frequency band;
the third antenna unit includes: the oscillator works in a second polarization direction of the preset frequency band; the second polarization direction is perpendicular to the first polarization direction.
2. The antenna device according to claim 1, wherein the second antenna unit further comprises a reflection plate, wherein:
the reflecting plate is disc-shaped;
the central line of the reflecting plate is superposed with the central axis of the antenna device.
3. The antenna device according to claim 2, wherein the second antenna element further comprises a first insulating support member, wherein:
the omnidirectional antenna oscillator is a cylindrical cavity;
the omnidirectional antenna oscillator is arranged on the reflecting plate through a first insulating supporting component.
4. The antenna device of claim 3, wherein the omnidirectional antenna element is a hollow cylindrical cavity;
and a U-shaped groove is formed in the wall of the cylindrical cavity of the omnidirectional antenna oscillator.
5. The antenna device according to any of claims 2-4, wherein the third antenna element further comprises a second dielectric support member and a first printed circuit board, PCB, substrate, wherein:
the oscillator in the second polarization direction is arranged on one surface of the first PCB substrate, which is back to the reflecting plate;
the other surface of the first PCB substrate is provided with a micro-strip feeder line for feeding the oscillator in the first polarization direction;
the first PCB substrate is arranged on the wall of the cylindrical cavity of the omnidirectional antenna oscillator through a second insulating support component.
6. The antenna device according to claim 5,
the vibrators in the second polarization direction are multiple and are arranged at equal intervals along the circumferential direction of the first PCB substrate; the oscillator in the second polarization direction is a microstrip line oscillator; the second polarization direction is a horizontal polarization direction.
7. The antenna device according to claim 6,
the first PCB substrate is a disc;
the number of the vibrators in the second polarization direction is 6, and the vibrators are respectively arranged on the radial axes with the included angles of 60 degrees on the disc.
8. The antenna device according to claim 7,
the vibrators in the second polarization direction are divided into 3 groups;
the microstrip feeder lines are divided into 3 groups and are respectively arranged at the positions of the other surface of the first PCB substrate corresponding to the vibrators in the second polarization direction.
9. The antenna device according to claim 5,
the oscillator in the first polarization direction is in a metal sheet shape;
the oscillator in the first polarization direction is fixed at the center of the first PCB substrate.
10. The antenna device according to claim 9,
the oscillator in the first polarization direction is a trapezoidal metal sheet;
the upper part of the trapezoid metal sheet is wide and the lower part of the trapezoid metal sheet is narrow;
the first polarization direction is a vertical polarization direction.
11. The antenna device of claim 10,
the trapezoid metal sheet comprises a lower edge extension part, and the lower edge extension part fixes the oscillator in the first polarization direction at the center of the first PCB substrate;
the middle of the lower part of the trapezoidal metal sheet is provided with a feeder line welding spot, and the antenna is fed by a radio frequency coaxial line.
12. The antenna device according to any one of claims 2 to 4, the second antenna unit further comprising a tuner fixed to a reflection plate, wherein:
the tuner is used for improving the performance of the antenna element.
13. The antenna device according to any of claims 2-4, further comprising:
the antenna house, with the bottom that antenna house detachable is connected, with the installation piece that the bottom is connected.
14. The antenna device of claim 13, further comprising:
a radio frequency active unit and a direct current feeder;
the radio frequency active unit is arranged behind the reflecting plate along the central axis of the antenna device in the direction from the top of the antenna housing to the bottom of the antenna housing; the bottom of the antenna housing is one side of an opening of the antenna housing;
one end of the direct current feeder is connected with the radio frequency active unit and used for feeding power to the radio frequency active unit;
and a hole is formed in the bottom cover, and the direct current feeder enters the interior of the antenna housing through the hole.
15. The antenna device according to any of claims 1-4,
the preset frequency band comprises: 5G frequency band.
16. An indoor distribution system comprising an antenna arrangement as claimed in any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020765833.8U CN212062698U (en) | 2020-05-11 | 2020-05-11 | Antenna device and indoor distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020765833.8U CN212062698U (en) | 2020-05-11 | 2020-05-11 | Antenna device and indoor distribution system |
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| Publication Number | Publication Date |
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| CN212062698U true CN212062698U (en) | 2020-12-01 |
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| CN202020765833.8U Active CN212062698U (en) | 2020-05-11 | 2020-05-11 | Antenna device and indoor distribution system |
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| CN (1) | CN212062698U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663446A (en) * | 2022-12-27 | 2023-01-31 | 京信通信技术(广州)有限公司 | Ceiling antenna |
-
2020
- 2020-05-11 CN CN202020765833.8U patent/CN212062698U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663446A (en) * | 2022-12-27 | 2023-01-31 | 京信通信技术(广州)有限公司 | Ceiling antenna |
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