CN107453044A - A kind of dual polarization micro-base station mimo antenna unit - Google Patents
A kind of dual polarization micro-base station mimo antenna unit Download PDFInfo
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- CN107453044A CN107453044A CN201710608854.1A CN201710608854A CN107453044A CN 107453044 A CN107453044 A CN 107453044A CN 201710608854 A CN201710608854 A CN 201710608854A CN 107453044 A CN107453044 A CN 107453044A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention discloses a kind of dual polarization micro-base station mimo antenna unit, is related to antenna technical field, including antenna element, divider wall and dual polarization compact micro-base station aerial array, the antenna element include feeder panel and radiant panel；Divider wall includes the 3rd dielectric-slab and frequency-selective surfaces (FSS) isolated location of periodic arrangement；Dual polarization compact micro-base station aerial array includes the antenna element and the divider wall.Compared with prior art, the present invention solves the problems, such as that micro-base station antenna miniaturization degree is low, can not meet that broadband demand and isolation are low.
Description
Technical field
The present invention relates to antenna technical field, especially a kind of dual polarization micro-base station MIMO antenna elements.
Background technology
As radio communication develops at a high speed to wideband multifunction direction, there is frequency in the wireless communication resources provided by macro base station
The problem of blind spot be present, in order to solve the above problems, micro- base occur in the deficiency of spectrum resource, signal transmission congestion, signal covering
Stand technology, micro-base station technology is the covering supplement to macro base station technology, and nowadays increasing densely inhabited district and interior are adopted
Carry out signal covering with micro-base station, and realize that good coverage effect, easy deployment installation, channel capacity be high and low cost will
Ask, meet the demand of LTE network development.
MIMO (Multiple-Input Multiple-Output) technology refers in transmitting terminal and receiving terminal respectively using more
Individual transmitting antenna and reception antenna, signal is set to transmit and receive by multiple antennas of transmitting terminal and receiving terminal, it is logical so as to improve
Believe quality.It can make full use of space resources, and MIMO is realized by multiple antennas, not increase frequency spectrum resource and antenna hair
In the case of penetrating power, system channel capacity can be increased exponentially, obvious advantage is shown, is considered as of future generation mobile logical
The core technology of letter.
At present, micro-base station is limited due to small volume and to the size of antenna, and the volume of base station, which reduces, causes antenna
Size declines, and then causes the unstable of the characteristics such as some antenna gains, radiation efficiency, bandwidth or even deteriorate；Also result in
Standing-wave ratio narrows, and weakens the coupling effect between antenna element, can be interfered with each other between channel.And design a kind of micro-base station and MIMO
Antenna communication pattern should meet the requirement of miniaturization, require that broadband and high-isolation requirement are still current issue again.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of dual polarization micro-base station mimo antenna unit, and it can be solved
Existing micro-base station antenna should meet small form factor requirements, require broadband and the problem of high-isolation again.
In order to solve the above problems, the technical solution adopted in the present invention is：
A kind of dual polarization micro-base station mimo antenna unit, including feeder panel and radiant panel, the feeder panel include ground plane
And current feed department, the current feed department include feed layer and dielectric portion, the feed layer includes the first mutually isolated transmission line and the
Two transmission lines, the ground plane are arranged in the dielectric portion, and the media fraction is segmented into the first medium of up-down structure
Plate and second medium plate；The ground plane is provided with symmetrical first groove of diagonal and the second groove, first transmission line,
The ground plane and first groove form the first feeding network, second transmission line, the ground plane and described second
Groove forms the second feeding network；The radiant panel is set in parallel in the top of the current feed department；The feed layer is arranged at institute
State the bottom of second medium plate.
In above-mentioned technical proposal, more specifically technical scheme can also be：First medium plate and second medium plate are difference
Dielectric constant；Radiant panel horizontal cross-section clips the square structure of triangle in corner respectively, and radiant panel is connected by short-circuit post
The ground plane is connect, the center in the center of circle of the top and bottom of the short-circuit post, the center of the radiant panel and the ground plane is same
On one axis.
Further：Plastic foam is provided between the radiant panel and the feed layer, the plastic foam is wrapped in
The short-circuit post, the plastic foam are centrally located on the axis of the short-circuit post.
Further：It is recessed provided with " work " font and symmetrical first groove of diagonal and second at the ground plane diagonal
Groove；First groove includes first paragraph rectangular recess, second segment linear recess and the 3rd section of long square groove, and described second
Groove includes the 4th section of long square groove, the 5th section of linear recess and the 6th section of long square groove.
Further：First transmission line include being arranged at the first port of end, first paragraph transmission line, second segment
Transmission line, the 3rd section of transmission line and the 4th section of transmission line；
First transmission line extends from the first port to the direction at bottom to the top of the second medium plate；
First transmission line prolongs from the first port to the direction at bottom to the top of the second medium plate
Stretch；From the end of first transmission line and along the first paragraph transmission line after second segment transmission line increase line width
Bearing of trend extends；The 3rd section of transmission line is from the second segment line end and using drift angle as 45 ° of isosceles three
The angular bending for realizing 45 ° of corner cuts；The 4th section of transmission line is from the end of the 3rd section of transmission line and with described
Two sections of transmission lines into 135 ° extension and it is vertical with the second segment linear recess.
Further：Second transmission line includes being arranged at the second port of end, the 5th section of transmission line, the 6th section of biography
Defeated line, the 7th section of transmission line and the 8th section of transmission line；
Second transmission line extends from the second port to the bottom of the second medium plate to top-direction；
The 5th section of transmission line is from the second port to the direction at bottom to the top of the second medium plate
Extension, the 6th section of transmission line transmit after increasing line width from the end of the 5th section of transmission line and along described 5th section
Line bearing of trend extension, the 7th section of transmission line from the 6th section of line end and using drift angle as 45 ° etc.
Lumbar triangle shape realizes the bending of 45 ° of corner cuts, and the 8th section of transmission line is from the 7th section of line end and described
Six sections of transmission lines into 135 ° extension and it is vertical with the 5th section of linear recess.
A kind of divider wall suitable for aerial array, including the 3rd dielectric-slab and the frequency-selective surfaces of periodic arrangement
Isolated location, the bottom of the 3rd dielectric-slab are provided with connector；The isolated location is positioned over the surface of the 3rd dielectric-slab.
In above-mentioned technical proposal, more specifically technical scheme can also be：The isolated location is loading opening Q-RING
Minor matters, the square opening ring minor matters include first paragraph microstrip line, second segment microstrip line, the 3rd section of microstrip line, the 4th section of micro-strip
Line, the 5th section of microstrip line, the 6th section of microstrip line and the 7th section of microstrip line；The first paragraph microstrip line is parallel to the 3rd medium
The bottom of plate, the second segment microstrip line are vertically connected with the first paragraph microstrip line and gone out from the first paragraph microstrip line end
The top extension of the 3rd dielectric-slab is sent to, the 3rd section of microstrip line is vertically connected with the second segment microstrip line, described
4th section of microstrip line is vertically connected with the 3rd section of microstrip line and from the 3rd section of microstrip line end to the described 3rd
The bottom extension of dielectric-slab, the 5th section of microstrip line are vertically connected with the 4th section of microstrip line and are situated between parallel to the described 3rd
The bottom of scutum, the 6th section of microstrip line are located at the perpendicular bisector of the 3rd section of microstrip line and to the bottoms of the 3rd dielectric-slab
Portion extends, and the 7th section of microstrip line is vertically connected with the 6th section of microstrip line and extended from the 6th section of microstrip line side
To opposite side.
A kind of dual polarization compact micro-base station aerial array, including a pair of above-mentioned dual polarization micro-base station mimo antenna units
With the above-mentioned divider wall suitable for aerial array, connector on the divider wall and the company set on the second medium plate
Opening is connect to match and be perpendicularly fixed on the perpendicular bisector of the feeder panel.
In above-mentioned technical proposal, more specifically technical scheme can also be：The divider wall cuts to form first from middle part
Divider wall and the second divider wall, realize that part loads the divider wall.
By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：
1. ground plane to be arranged to the inside of dielectric portion, thus media fraction is cut into the two layer medium plate of up-down structure,
The bandwidth of micro-base station antenna can be increased, experiment shows bandwidth range in 2.5GHz-2.7GHz frequency；Radiant panel is put down
Row is in current feed department above, and the feed layer of current feed department is arranged at the bottom of second medium plate, the first power transmission line, the second power transmission line with connect
Thus the first feeding network and the second feeding network that stratum is formed employ horizontal positioned feed to radiating layer FD feed
Network, electromagnetic coupled can occur in the first groove and the second groove respectively and produce cornerwise along first medium plate two
Electromagnetic wave, the polarization of ele direction being coupled on radiant panel are mutually perpendicular to, and ensure that the isolation between antenna port is high.
2. the Miniaturization Design of micro-base station can effectively adapt to narrow and small base station space；Mimo antenna design ensures antenna element
Between work independently of one another.Dual-polarized mimo antenna technology not only improves receiving ability by polarity diversity, saves frequency spectrum resource,
And signal fadeout and increase channel quantity are prevented by space diversity.
3. the first medium plate and second medium plate that are separated by ground plane use different dielectric constants, first medium plate
Structure with second medium plate can be with identical so that it is simple to make feeder panel technique.
4. the horizontal cross-section of radiant panel clips the square structure of triangle in corner respectively, the electromagnetic consumable of reduction, increase
Add omni-directional.
5. radiant panel connects ground plane by short-circuit post, the isolation of frequency bandwidth is improved, experiment display is short not adding
The isolation of low frequency portions of bandwidth is 25dB during the post of road, and after adding short-circuit post, the isolation of low frequency portions of bandwidth is bright to be more than
30dB；The top and bottom center of circle of short-circuit post, radiant panel center, the line of ground plane center four points one, can reach more preferable symmetrical configuration
Property, stability.
6. increasing the distance between radiant panel and feed layer, and plastic foam is installed, plastic foam wraps up short-circuit post, so as to
Reduce interfering for electric feed signal.
7. the first groove and the second groove are arranged into symmetrical " work " the type structure of diagonal, the first groove is further lifted
Electromagnetic coupled between the first transmission line between the second groove and the second transmission line.
8. the first transmission line and the second transmission line are respectively classified into multistage, realize and the first transmission line and the second transmission line are entered
Row impedance matching is handled；First transmission line and the second transmission line are vertical with the first groove and the second groove respectively, realize first
Transmission line produces electromagnetic coupled and the spoke above first medium plate in the first groove and the second transmission line in the second groove
Plate is penetrated to be fed.
9. divider wall is using the isolated location of the frequency-selective surfaces of periodic arrangement, experiment display, when the isolated location
When the resonant frequency of structure and the resonant frequency of incidence wave are coincide, incidence wave can not penetrate the frequency rotation table of the periodic arrangement
Face, it is to be less than -10dB, i.e. designed periodic arrangement frequency surface of revolution in 2.5GHz-2.7GHz in frequency range
The incidence of the frequency wave can be greatly reduced；When loading the divider wall, experiment shows that return loss is all higher than 14dB, has good
Good stationary wave characteristic, and not same polarization interport isolation is both greater than 30dB, meets the design requirement of dual polarized antenna.
10. micro-base station antenna has just used above-mentioned MIMO micro-base stations antenna and divider wall, meet volume minimize, broadband with
And the requirement that isolation is high.
11. divider wall is cut open from middle part, the first divider wall and the second divider wall are formed after cutting, realize part loading every
From wall, to reduce the reflective surface area of certain media substrate；Experiment display, after the divider wall that part loads the present invention,
In 2.5GHz-2.7GHz frequency range, the isolation between antenna element not same polarization port is improved to 32dB.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the assembling schematic diagram for the dual polarization micro-base station mimo antenna unit that the first embodiment of the invention provides；
Fig. 2 is the front schematic view shown in Fig. 1；
Fig. 3 is the reverse side schematic diagram shown in Fig. 1；
Fig. 4 is the side schematic view shown in Fig. 1；
Fig. 5 is the schematic diagram of the ground plane shown in Fig. 1；
Fig. 6 is that the reflectance factor of the dual polarization micro-base station mimo antenna unit shown in Fig. 1 emulates schematic diagram；
Fig. 7 is the dual polarization micro-base station mimo antenna unit shown in Fig. 4 in the case of adding and not adding short-circuit two kinds of post
The comparison schematic diagram of antenna port isolation；
Electric field magnitude distribution when Fig. 8 is the dual polarization micro-base station mimo antenna unit port excitation shown in Fig. 1；
Fig. 9 be the dual polarization micro-base station mimo antenna unit shown in Fig. 1 first port in 2.6GHz E faces, H faces
Main polarization directional diagram and Cross polarization pattern characteristic；
Figure 10 be the dual polarization micro-base station mimo antenna unit shown in Fig. 2 second port in 2.6GHz E faces, H faces
Main polarization directional diagram and Cross polarization pattern characteristic；
Figure 11 is the divider wall structural representation suitable for aerial array；
Figure 12 is the transmissison characteristic schematic diagram of electromagnetic wave vertical incidence cycle isolated location as shown in figure 11；
In the case that Figure 13 is the divider wall for being not loaded with the present invention, a pair of dual polarization micro-base station MIMO antenna elements are respectively held
The emulation schematic diagram of the reflectance factor of mouth.
In the case that Figure 14 is the divider wall for being not loaded with the present invention, a pair of dual polarization micro-base station MIMO antenna elements are respectively held
The emulation schematic diagram of the transmission coefficient of mouth；
In the case that Figure 15 is an increase metal division board and only increases divider wall of the invention, a pair of dual polarization micro-base stations
Isolation comparison diagram between mimo antenna unit same polarization port；
Figure 16 is the assembling schematic diagram of the aerial array of the divider wall of overall loading as described in Figure 11；
Figure 17 is the assembling schematic diagram of the aerial array of the divider wall of part loading as described in Figure 11；
Isolation comparison diagrams of the Figure 18 between each port of aerial array shown in Figure 16；
Figure 19 be from the aerial array shown in Figure 16 be improved to aerial array shown in Figure 17 before and after isolation between each port
Spend comparison diagram.
Symbol description is as follows in figure：
100- dual polarization micro-base station mimo antenna units, 70- feeder panels, 50- radiant panels, 10- ground planes, 20- feeds
Portion, 30- feed layers, the transmission lines of 31- first, 310- first ports, 311- first paragraph transmission lines, 312- second segment transmission lines,
The 3rd section of transmission line of 313-, the 4th section of transmission line of 314-, the transmission lines of 32- second, the 6th section of the 5th section of transmission line of 321-, 322- biography
The 7th section of transmission line of defeated line, 323-, the 8th section of transmission line of 324-, 320- second ports, 40- dielectric portion, 41- first mediums
Plate, 42- second medium plates, 421- the 3rd are open, and 422- the 4th is open, the grooves of 11- first, 111- first paragraph rectangular recess,
112- second segment linear recess, the 3rd section of long square groove of 113-, the grooves of 12- second, the 4th section of long square groove of 121-, 122-
5th section of linear recess, the 6th section of long square groove of 123-, 51- short circuit posts, 511- first are open, and 512- second is open, 52-
Plastic foam, 80- connectors, 60- divider walls, the connectors of 611- first, the connectors of 612- second, the dielectric-slabs of 61- the 3rd, 62-
Isolated location, 621- first paragraph microstrip lines, 622- second segment microstrip lines, the 3rd section of microstrip line of 623-, the 4th section of micro-strip of 624-
Line, the 5th section of microstrip line of 625-, the 6th section of microstrip line of 626-, the 7th section of microstrip line of 627-, 210- dual polarized antennas, dual polarization are tight
Gather type micro-base station aerial array 200, the first divider wall 601 and the second divider wall 602.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described：
Embodiment 1：
Dual polarization micro-base station mimo antenna unit 100 as shown in Figures 1 to 5, the dual polarization micro-base station mimo antenna list
Member 100 includes feeder panel 70 and radiant panel 50, and the feeder panel 70 includes ground plane 10, current feed department 20, and current feed department 20 is used for spoke
The feed-in electromagnetic wave signal of plate 50 is penetrated, and includes feed layer 30 and dielectric portion 40；Ground plane 10 is arranged inside dielectric portion 40, and will
Dielectric portion 40 is divided into the first medium plate 41 and second medium plate 42 of up-down structure；Radiant panel 50 is set in parallel in feed layer 30
Top.Wherein, feed layer 30 is arranged at the bottom of second medium plate 42, including the first transmission line 31 and the second transmission line 32,
First transmission line 31 is arranged at the front view left-half of feed layer 30 and is provided with first port 310, and the second transmission line 32 is set
It is placed in the front view right half part of feed layer 30 and is provided with second port 320, first port 310 and second port 320 is used respectively
In mutually isolated to the FD feed of feed layer 30, the first transmission line 31 and the second transmission line 32.
Wherein, dielectric portion 40 is divided into the first medium plate 41 of up-down structure and the tool of second medium plate 42 by ground plane 10
The body ration of division does not limit.Alternatively, ground plane 10 is according to 5:Dielectric portion 40 is divided into up-down structure by 6 ration of division
First medium plate 41 and second medium plate 42, or other rations of division, to reach the bandwidth of increase antenna.
Alternatively, first medium plate 41 and second medium plate 42 are in the case of relative dielectric constant difference, structure size
Can be with identical.Such as：The length of first medium plate 41 and second medium plate 42, width are identical or identical with caliper portion.
Ground plane 10 can be metal patch structure, and the first transmission line 31 and the second transmission line 32 can be microstrip transmission line.
Alternatively, first medium plate 41 and the set of second medium plate 42 can be printed circuit board (PCB), ground plane 10 it is printable and
Between first medium plate 41 and the second medium plate 42, the first transmission line 31 and first transmission line 31 are printed in second Jie
Scutum 42.
It is provided with the symmetrical groove 12 of first groove 11 and second of diagonal at the diagonal of ground plane 10, the first transmission line 31,
Ground plane 10 and thereon the first groove 11 form the first feeding network, the second transmission line 32, ground plane 10 and the second groove thereon
12 the second feeding networks of composition, the first feeding network and the second feeding network are used for the feed-in electromagnetic wave signal of radiant panel 50.
The dual polarization micro-base station mimo antenna unit 100, employs horizontal positioned feeding network, in first port 310
After the FD feed of second port 320, electromagnetic coupled can occur at the first groove 11 and the second groove 12 respectively and produce
Two cornerwise electromagnetic waves extended along first medium plate 41, the polarization of ele direction being coupled on radiant panel are mutually hung down
Directly, it ensure that the isolation between antenna port is high.
As shown in figure 4, to install and improve stability, radiant panel 50 connects ground plane 10, radiation by short-circuit post 51
The opening of plate 50 centrally disposed first 511, the opening of second medium plate 42 centrally disposed second 512, the center of circle of the short-circuit top and bottom of post 51,
The center of radiant panel 50 and the line of 10 center of ground plane four points one.
During installation, short-circuit post 51 connects ground plane 10 from the insertion second medium plate 42 of the second opening 512, and is open from first
511 insertion radiant panels 50, while the center of circle of the top and bottom of short-circuit post 51, the center of radiant panel 50, the center of ground plane 10, the first opening
511 centers and the second opening line of 512 center six points one, to reach more preferable structural symmetry, stability.
As shown in figure 4, in order to lift coupling effect, increase the distance between radiant panel 50 and feed layer 30 and plastics are installed
Foam 52, short-circuit post 51 are wrapped in short-circuit post 51 using plastic foam 52.
As shown in figure 5, in order to be lifted between the first groove 11 and the first transmission line 31 and the second groove 12 and second passes
Electromagnetic coupled between defeated line 32, the first groove 11 and the second groove 12 are respectively " work " font groove, wherein, the first groove
11 include first paragraph rectangular recess 111, second segment linear recess 112 and with the 3rd section of long square groove 113, the second groove
12 include the 4th section of long square groove 121, the 5th section of linear recess 122 and the 6th section of long square groove 123.
First groove 11 and the second groove 12 can also be the other shapes such as cross, I shapes, C-shaped, the He of the first groove 11
Second groove 12 refers to above-mentioned " work " font groove design.
As shown in Fig. 2 the horizontal cross-section of radiant panel 50 clips the square structure of triangle in corner respectively, reduction need not
The electromagnetic consumable wanted, increase omni-directional.
The bottom at the top of first medium version 41, the surface of ground plane 10 and second medium version 42 is brought into close contact, earthing rod 51
Surface, radiant panel 50, plastic foam 52 and ground plane 10 closely connect.
Using the dual polarization micro-base station mimo antenna unit 100 of offer, the first feeding network and the second feeding network can be with
To the feed-in electromagnetic wave signal of radiant panel 50 by way of coupling, i.e., feed layer 30 and ground plane 10 by way of coupling to spoke
Penetrate the FD feed of plate 50.Specifically, energy produces electromagnetism coupling by the first transmission line 31 at the first groove 11 of ground plane 10
Close, its energy is radiated from the first groove 11 coupling radiant panel 50.Similarly, energy passes through the second transmission line 32 in ground plane 10
The second groove 12 at produce electromagnetic coupled, its energy from the second groove 12 coupling radiant panel 50 radiated.
First port 310 is located at the end of first transmission line 31 and from the bottom of the second medium plate 42
Extend to the top；As shown in figure 3, the first transmission line 31 includes first paragraph transmission line 311, second segment transmission line the 312, the 3rd
Section transmission line 313 and the 4th section of transmission line 314, realize and impedance matching processing is carried out to transmission line.
First paragraph transmission line 311 is from the end of first port 310 to the base plane of second medium plate 42 to top-direction
Extension, second segment transmission line 312 extend after increasing line width along the direction of first paragraph transmission line 311, the 3rd section of transmission line 313 from second
Set out and realize the bending of 45 ° of corner cuts, the 4th section of transmission line 314 using drift angle as 45 ° of isosceles triangle in section transmission line 312 end
Extend from the 3rd section of end of transmission line 313 and second segment transmission line into 135 ° and diagonally and hung down with the first groove 11
Directly, realize that the first transmission line 31 produces electromagnetic coupled at the first groove 11 and the radiant panel 50 above first medium plate 41 enters
Row feed.
Second port 320 be arranged at the end of second transmission line 32 and from the bottom of second medium plate 42 to
The top extension；As shown in figure 3, the second transmission line 32 include the 5th section of transmission line 321, the 6th section of transmission line 322, the 7th section
Transmission line 323 and the 8th section of transmission line 324, realize and impedance matching processing is carried out to transmission line.
5th section of transmission line 321 is from the end of second port 320 to the base plane of second medium plate 42 to top-direction
Extension, the 6th section of transmission line 322 extend after increasing line width along the 5th section of direction of transmission line 321, and the 7th section of transmission line 323 is from the
Set out and realize the bending of 45 ° of corner cuts, the 8th section of transmission line using drift angle as 45 ° of isosceles triangle in six sections of ends of transmission line 322
324 from the 7th section of end of transmission line 323 and the 6th section of transmission line into 135 ° and diagonally extension and with the second groove 12
Vertically, realize that the second transmission line 32 produces electromagnetic coupled and the radiant panel 50 above first medium plate 41 at the second groove 12
Fed.
As shown in figure 3, the first transmission line 31 and transmission line 32 do not contact in feed layer 30, and the latter end of the first transmission line 31
Latter end angle with the second transmission line 32 is in 45 °, i.e. the first transmission line 31 and the second transmission line 32 are mutually isolated, and the first feed
Network and the coupling of the signal in orthogonal of the second feeding network feed-in.
First transmission line 31 and the second transmission line 32 can also be other shapes, and such as C-shaped, L shapes, but total principle is：The
One transmission line 31 and the second transmission line 32 do not contact, i.e. the first transmission line 31 and second transmission line 32 are mutually isolated, and first
The latter end angle of the latter end of transmission line 31 and the second transmission line 32 be ± 45 ° and respectively with the first groove 11 of ground plane 10 and
Two grooves 12 are vertical coupled, realize that dual polarization is fed.
Dual polarization micro-base station mimo antenna unit 100 also includes a pair of connectors 80, for the first feeding network and
Two feeding network FD feeds, a connector 80 electrically connect with first port 310, another connector 80 and second port 320
Electrical connection.
One in connector 80 electrically connects with first port 310, the electricity of another and second port 320 in connector 80
Connection, can specifically realize electrical connection by way of welding.
Connector 80 is radio frequency connector, microwave high-frequency connector or microwave connector is alternatively referred to as when frequency is higher, such as
SMA Sub-Miniature-A, the characteristic impedance of connector is 50 ohm.
In use, the first feeding network and the second feeding network carry out couple feed by connecting SMA to radiant panel 50.
Specifically, microwave signal is by one of SMA feed-ins, and energy is by the first transmission line 31 the of ground plane 10
Electromagnetic coupled is produced at one groove 11, its energy is radiated from the first groove 11 coupling radiant panel 50.Similarly, microwave signal
By another SMA feed-in, energy produces electromagnetic coupled, its energy by the second transmission line 32 at the second groove 12 of ground plane 10
Amount is radiated from the second groove 12 coupling radiant panel 50.
The size of dual polarization micro-base station mimo antenna unit 100 is 0.87 λ0×1.74λ0×0.43λ0。
As shown in fig. 6, schematic diagram is emulated for the reflectance factor of dual polarization micro-base station mimo antenna unit 100 of the present invention, its
In, solid line emulates schematic diagram for the reflectance factor of first port 310, and dotted line is illustrated for the reflectance factor emulation of second port 320
Figure.From diagram, the bandwidth of operation of the dual polarization micro-base station mimo antenna 100 of embodiment of the present invention is wider,
In 2.5GHz-2.7GHz frequency range, the reflectance factor of first port 310 and second port 320 is respectively less than -14dB, meets
Micro-base station antenna standing wave ratio is less than 1.5 index request.
As shown in Figure 7 and Figure 8, Fig. 7 is the antenna port isolation in the case of adding and not adding short-circuit 51 two kinds of post
High frequency is compared in comparison schematic diagram, the coupling that simulation result is shown between low frequency part first port 310 and second port 320
Part is strong, and in the case where not adding short-circuit post 51, the isolation of low frequency portions of bandwidth is 25dB, illustrates first port
Coupling between 310 and second port 320 be present.Fig. 8 is electric field magnitude distribution when port is encouraged, and first port 310 is carried out
After excitation, the diagonal of radiant panel 50 is nearby the peak value of electric field, and is the zero point region of voltage near another diagonal,
Another port is similarly.Therefore at the center of radiant panel 50 for the minimum value of the whole voltage of radiant panel 50, added in this position
Short-circuit post 51 influences less, i.e., not changing the isolation of beamwidth of antenna and can two antennas of raising on the radiation mode of antenna, imitates
Interport isolation after the short-circuit post 51 of true result display addition between first port 310 and second port 320 is more than 30dB.
If Fig. 9 and Figure 10 are respectively the first port 310 and of dual polarization micro-base station mimo antenna unit 100 of the present invention
Main polarization directional diagram and the Cross polarization pattern characteristic in Two-port netwerk 320 E faces, H faces in 2.6GHz.Simulation result shows,
Dual polarization micro-base station mimo antenna unit all meets HPBW in the range of frequency 2.5GHz-2.7GHz>60 °, cross polarization ratio is more than
20dB requirement, and front and rear ratio about 10dB.
It is the divider wall 60 with band-stop response suitable for aerial array of the present invention, to improve day shown in Figure 11
Same polarization interport isolation and cross polarization interport isolation between line unit, divider wall 60 include the 3rd dielectric-slab 61 and week
The frequency-selective surfaces FSS isolated locations 62 of phase property arrangement, isolated location 62 is positioned over the surface of the 3rd dielectric-slab 61.
Divider wall 60 is used in the optional assembling mode of aerial array, and the concrete structure of a pair of dual polarized antennas 210 is not
Limit.The cellular construction of a pair of dual polarized antennas 210 is identical with the structure of dual polarization micro-base station mimo antenna unit 100.
Divider wall 60 is fixed and is disposed vertically in feeder panel 70 and positioned at the perpendicular bisector of a pair of dual polarized antennas 210.
Specifically, fixed at the perpendicular bisector between each pair antenna 210 and be disposed vertically divider wall 60, in two days
The emittance in the direction between line 210 will be weakened, so as to which the energy coupling between two antennas can also reduce, i.e. antenna
Same polarization interport isolation and cross polarization interport isolation between 210 will improve.
As shown in figure 11, loading the isolated location 62 of the square opening ring of T-shaped minor matters includes first paragraph microstrip line 621, the
Two sections of microstrip lines 622, the 3rd section of microstrip line 623, the 4th section of microstrip line 624, the 5th section of microstrip line 625, the 6th section of microstrip line 626
With the 7th section of microstrip line 627.Wherein, first paragraph microstrip line 621 is parallel to the bottom of the 3rd dielectric-slab 61, second segment microstrip line
622 are vertically connected with first paragraph microstrip line 621 and prolong from the end of first paragraph microstrip line 621 to the top of the 3rd dielectric-slab 61
Stretch, the 3rd section of microstrip line 623 is vertically connected with second segment microstrip line 622, the 4th section of microstrip line 624 and the 3rd section of microstrip line 623
Be vertically connected and extend from the 3rd section of end of microstrip line 623 to the bottom of the 3rd dielectric-slab 61, the 5th section of microstrip line 625 with
4th section of microstrip line 624 is vertically connected and is located at the 3rd parallel to the bottom of the 3rd dielectric-slab 61, the 6th section of microstrip line 626
The perpendicular bisector of section microstrip line 623 simultaneously extends, the 7th section of microstrip line 627 and the 6th section of microstrip line to the bottom of the 3rd dielectric-slab 61
626 are vertically connected and extend to opposite side from the 6th section of side of microstrip line 626.
Wherein, the concrete structure of the frequency-selective surfaces FSS isolated locations 62 of periodic arrangement and unlimited in divider wall 60
It is fixed, there are triskelia unit, hexagonal cells, anchor unit, square alignment unit of curling up.
The simple to install and stability of divider wall 60 are improved, second medium plate 42 is provided with the 3rd opening 421 and the 4th and opened
Mouth 422, divider wall 60 each extends over the first connector 611 and the second connector 612 in two bottom sides, to divider wall 60
Installation.3rd opening 421 and the 4th opening 422 are respectively positioned on the perpendicular bisector of a pair of dual polarized antennas 210 and are symmetrical with the 3rd
The center line of dielectric-slab 61, the first connector 611 and the second connector 612 are open 422 points with the 3rd opening 421 and the 4th respectively
Do not match, be conveniently connected.
If in a pair of antennas, the first port of an antenna is port 1, and second port is port 2；The of another antenna
Single port is port 3, and second port is port 4.The identical port of different antennae is properly termed as same polarization port, such as not on the same day
The first port and first port of line, or second port and second port, i.e. port 1 and port 3, or port 2 and port
4.The different port of different antennae is properly termed as not same polarization port, such as the first port and second port of different antennae, or
Person's second port and first port, i.e. port 1 and port 4, or port 2 and port 3.
The size of divider wall 60 is 50mm × 100mm × 1mm.
It is the transmissison characteristic schematic diagram of electromagnetic wave vertical incidence isolated location 62 as shown in figure 12.Simulation result shows, when
When the resonant frequency of the cellular construction and the resonant frequency of incidence wave are coincide, incidence wave can not penetrate the surface, and it is in 2.5GHz-
It is less than -10dB in 2.7GHz, i.e. designed surface can greatly reduce the incidence of the frequency wave.
As shown in Figure 13 and Figure 14 for be not loaded with the present invention divider wall 60 in the case of each port of a pair of dual polarizations it is anti-
Penetrate the emulation schematic diagram of coefficient and transmission coefficient.Simulation result shows that the return loss of each port is all higher than 14dB, has good
Good stationary wave characteristic, and not same polarization interport isolation is both greater than 30dB, meets the design requirement of dual polarized antenna.But from
As can be seen that isolation diminishes suddenly between same polarization port in 2.5GHz-2.7GHz in Figure 14, illustrate same polarization port
Between interference can be produced apart from due to too small.
As shown in figure 15 between a metal-loaded division board and the same polarization port for the divider wall 60 for only loading the present invention
Isolation comparison diagram.Simulation result shows that the isolation of simple metal-loaded plate has reached 32dB, and is loaded with the present invention's
The antenna of divider wall 60, the isolation between same polarization port have reached 35dB, and HFS has been even up to 42dB. contrasts can
Knowing the divider wall 60 of the present invention has preferable band-stop response, while the height of divider wall 60 of the invention in emulation to the ripple of the frequency
Degree can but play the effect of high isolation, this illustrates that FSS divider walls play compared to metal division board much smaller than the height of metal wall
The effect of one reduction section.In addition, be loaded with the present invention divider wall 60 after four ports reflectance factor be also both less than-
14dB, it may be said that bright each antenna element has good impedance matching in 2.5GHz-2.7GHz.
As shown in Figure 16 to Figure 17, a kind of dual polarization compact micro-base station aerial array 200, the micro- base of dual polarization compact
Station antenna array 200 includes a pair of antennas 210 and divider wall 60, the structure of antenna 210 and dual polarization micro-base station in the present embodiment
The structure of mimo antenna unit 100 is identical, the divider wall that the structure of divider wall 60 is the frequency-selective surfaces FSS of periodic arrangement
60 structure is identical, and antenna 210 includes the feeder panel 70 and radiant panel 50 being made up of ground plane and current feed department, and divider wall 60 is fixed
In feeder panel 70, to lift the isolation between different antennae.
Divider wall 60 is fixed on feeder panel 70 and positioned at the perpendicular bisector of a pair of antennas 210.
Antenna in dual polarization compact micro-base station aerial array 200 is dual polarized antenna, and the overall chi of a pair of antennas
It is very little in 200mm × 100mm × 5mm, the size of divider wall 60 is 50mm × 100mm × 1mm.
After the entirety of dual polarization compact micro-base station aerial array 210 for the present invention loads divider wall 60 as shown in figure 18,
Isolation schematic diagram between each port.Simulation result is shown, after overall loading divider wall 60, the isolation between same polarization port
Degree is all higher than 30dB.But it can be found that difference on antenna element from the data of another group of not same polarization interport isolation
The interport isolation that polarizes is deteriorated in low frequency part.Although the wave energy of the frequency is largely absorbed by frequency-selective surfaces structure,
It is due to polarized wave between antenna element by frequency-selective surfaces partial dispersion, when swashing corresponding to the ripple of another polarised direction
When encouraging port and receiving the polarized wave of these all directions, the interport isolation for causing antenna element is deteriorated.
Such as Figure 14 and Figure 18, it is known that the overall loading divider wall of dual polarization compact micro-base station aerial array 200 of the invention
Before and after 60, the numerical value change of each interport isolation.Because divider wall carries out part reflection to electromagnetic wave, not same polarization end result in
Isolation between mouthful deteriorates, but in the case where being not loaded with divider wall, the isolation between not same polarization port is again relatively good.
Dual polarization compact micro-base station antenna system includes multiple dual polarization compact micro-base station aerial arrays 200；It is bipolar
Divider wall is set between change compact micro-base station aerial array 200.
Dual polarization micro-base station mimo antenna unit, divider wall and the antenna that above-mentioned all embodiments of the present invention provide
Array has good interport isolation, moderate dimensions, meets the requirement of micro-base station size, had both gone for micro-base station communication system
System, is readily applicable to full duplex communication system, is also used as mimo antenna, and other any possible application scenarios
In.
Embodiment 2：
As shown in Figure 17 and Figure 19, as a further improvement on the present invention, Figure 17 is the antenna that part loads divider wall 60
Array schematic diagram, the assembling mode of divider wall 60 is further improved, divider wall 60 is cut open from middle part, cuts shape after certain distance
Into the first divider wall 601 and the second divider wall 602, realize that part loads divider wall 60 of the present invention, to reduce certain media substrate
Reflective surface area.Figure 19 is difference between antenna element in the case of aerial array integrally loads and partly loads 60 two kinds of divider wall
Isolation contrast schematic diagram between polarization port.Simulation result shows, after the divider wall 60 that part loads the present invention, especially
Ground, in 2.5GHz-2.7GHz frequency range, the isolation between antenna element not same polarization port is improved to 32dB.
The other technical characteristics of the present embodiment 2 are same as Example 1.
Claims (10)
1. a kind of dual polarization micro-base station mimo antenna unit, including feeder panel (70) and radiant panel (50), the feeder panel (70)
Including ground plane (10) and current feed department (20), the current feed department (20) includes feed layer (30) and dielectric portion (40), the feed
Layer (30) includes mutually isolated the first transmission line (31) and the second transmission line (32), it is characterised in that：The radiant panel (50)
It is set in parallel in the top of the current feed department (20)；The ground plane (10) is arranged in the dielectric portion (40), and by described in
Dielectric portion (40) is divided into the first medium plate (41) and second medium plate (42) of up-down structure；The feed layer (30) is arranged at
The bottom of the second medium plate (42)；The ground plane (10) is recessed provided with symmetrical first groove (11) of diagonal and second
Groove (12), first transmission line (31), the ground plane (10) and first groove (11) form the first feeding network, institute
State the second transmission line (32), the ground plane (10) and second groove (12) and form the second feeding network.
2. dual polarization micro-base station mimo antenna unit according to claim 1, it is characterised in that：Radiant panel (50) is horizontal to be cut
The square structure of triangle is clipped in face in corner respectively, and radiant panel (50) connects the ground plane by short-circuit post (51)
(10), the center in the center of circle of the top and bottom of the short-circuit post (51), the center of the radiant panel (50) and the ground plane (10)
On the same axis.
3. dual polarization micro-base station mimo antenna unit according to claim 1 or 2, it is characterised in that：First medium plate
(41) and second medium plate (42) is different dielectric constant；It is provided between the radiant panel (50) and the feed layer (30)
Plastic foam (52), the plastic foam (52) are wrapped in the short-circuit post (51), and the plastic foam (52) is centrally located at
On the axis of the short-circuit post (51).
4. dual polarization micro-base station mimo antenna unit according to claim 3, it is characterised in that：First groove (11)
With second groove (12) be " work " font and diagonal is symmetrical；It is recessed that first groove (11) includes first paragraph rectangle
Groove (111), second segment linear recess (112) and the 3rd section long square groove (113), second groove (12) include the 4th section
Rectangular recess (121), the 5th section of linear recess (122) and the 6th section long square groove (123).
5. dual polarization micro-base station mimo antenna unit according to claim 4, it is characterised in that：First transmission line
(31) include being arranged at the first port (310) of end, first paragraph transmission line (311), second segment transmission line (312), the 3rd section
Transmission line (313) and the 4th section of transmission line (314)；
First transmission line (31) is from the first port (310) to the side at bottom to the top of the second medium plate (42)
To extension；
First transmission line (311) from the first port, (to the bottom of the second medium plate (42) extremely push up by 310)s
The direction extension in portion；After second segment transmission line (312) the increase line width from the end of first transmission line (311) simultaneously
Extend along the bearing of trend of the first paragraph transmission line (311)；The 3rd section of transmission line (313) is from the second segment transmission line
(312) end is set out and is realized the bending of 45 ° of corner cuts using drift angle as 45 ° of isosceles triangle；The 4th section of transmission line (314)
From the end of the 3rd section of transmission line (313) and with the second segment transmission line (312) into 135 ° extension and with it is described
Second segment linear recess (112) is vertical.
6. dual polarization micro-base station mimo antenna unit according to claim 4, it is characterised in that：Second transmission line
(32) include being arranged at the second port (320) of end, the 5th section of transmission line (321), the 6th section of transmission line (322), the 7th section
Transmission line (323) and the 8th section of transmission line (324)；
Second transmission line (32) is from the second port (320) to the bottom of the second medium plate (42) to top-direction
Extension；
The 5th section of transmission line (321) from the second port (320)s to the bottom of the second medium plate (42) extremely
The direction extension at top, the 6th section of transmission line (322) go out after increasing line width from the end of the 5th section of transmission line (321)
Send out and extend along the bearing of trend of the 5th section of transmission line (321), the 7th section of transmission line (323) passes from described 6th section
Set out and realize the bending of 45 ° of corner cuts, the 8th section of transmission line using drift angle as 45 ° of isosceles triangle in defeated line (322) end
(324) from the 7th section of transmission line (323) end and the 6th section of transmission line (322) into 135 ° of extensions and with it is described
5th section of linear recess (122) is vertical.
A kind of 7. divider wall suitable for aerial array, it is characterised in that：Including the 3rd dielectric-slab (61) and periodic arrangement
The isolated location (62) of frequency-selective surfaces, the bottom of the 3rd dielectric-slab (61) are provided with connector；The isolated location
(62) it is positioned over the surface of the 3rd dielectric-slab (61).
8. the divider wall according to claim 7 suitable for aerial array, it is characterised in that：The isolated location (62) is
Loading opening Q-RING minor matters, the square opening ring minor matters include first paragraph microstrip line (621), second segment microstrip line (622),
3rd section of microstrip line (623), the 4th section of microstrip line (624), the 5th section of microstrip line (625), the 6th section of microstrip line (626) and the 7th
Section microstrip line (627)；The first paragraph microstrip line (621) is parallel to the bottom of the 3rd dielectric-slab (61), the second segment
Microstrip line (622) and the first paragraph microstrip line (621) be vertically connected and from first paragraph microstrip line (621) end to
The top extension of 3rd dielectric-slab (61), the 3rd section of microstrip line (623) are vertical with the second segment microstrip line (622)
It is connected, the 4th section of microstrip line (624) and the 3rd section of microstrip line (623) are vertically connected and from the 3rd section of microstrip lines
(623) end set out to the 3rd dielectric-slab (61) bottom extension, the 5th section of microstrip line (625) with described 4th section
Microstrip line (624) is vertically connected and is located at parallel to the bottom of the 3rd dielectric-slab (61), the 6th section of microstrip line (626)
The perpendicular bisector of the 3rd section of microstrip line (623) simultaneously extends, the 7th section of micro-strip to the bottom of the 3rd dielectric-slab (61)
Line (627) is vertically connected with the 6th section of microstrip line (626) and extended to from the 6th section of microstrip line (626) side another
Side.
A kind of 9. dual polarization compact micro-base station aerial array, it is characterised in that：Including a pair of such as any one of claims 1 to 7
Divider wall described in described dual polarization micro-base station mimo antenna unit and any one of claim 8 to 10, the divider wall
Connector matches with the connection opening set on the second medium plate (42) and is perpendicularly fixed at hanging down for the feeder panel (70)
On straight bisector.
10. dual polarization compact micro-base station aerial array according to claim 9, it is characterised in that：The divider wall from
Cut to form the first divider wall (601) and the second divider wall (602) in middle part.
Priority Applications (1)
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|---|---|---|---|
| CN201710608854.1A CN107453044A (en) | 2017-07-25 | 2017-07-25 | A kind of dual polarization micro-base station mimo antenna unit |
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| CN201710608854.1A CN107453044A (en) | 2017-07-25 | 2017-07-25 | A kind of dual polarization micro-base station mimo antenna unit |
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| CN111403899A (en) * | 2018-12-27 | 2020-07-10 | 华为技术有限公司 | Multi-frequency antenna structure |
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| US11749881B2 (en) | 2020-03-24 | 2023-09-05 | Commscope Technologies Llc | Base station antennas having an active antenna module and related devices and methods |
| US11909121B2 (en) | 2020-03-24 | 2024-02-20 | Commscope Technologies Llc | Radiating elements having angled feed stalks and base station antennas including same |
| WO2021251735A1 (en) * | 2020-06-08 | 2021-12-16 | 삼성전자 주식회사 | Antenna structure and electronic device comprising same |
| WO2022007248A1 (en) * | 2020-07-07 | 2022-01-13 | 深圳市信维通信股份有限公司 | 5g millimeter wave dual-polarized antenna unit, antenna array, and terminal device |
| CN113036420A (en) * | 2021-05-13 | 2021-06-25 | 网络通信与安全紫金山实验室 | Antenna unit and antenna module |
| WO2023029431A1 (en) * | 2021-08-31 | 2023-03-09 | Commscope Technologies Llc | Base station antennas having at least one grid reflector and related devices |
| CN114843772A (en) * | 2022-04-25 | 2022-08-02 | 重庆邮电大学 | Dual-frequency dual-circular-polarization high-isolation Fabry-Perot cavity MIMO antenna and processing method thereof |
| WO2023216217A1 (en) * | 2022-05-13 | 2023-11-16 | 京东方科技集团股份有限公司 | Antenna and electronic device |
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Application publication date: 20171208 |