CN103956587B - Double polarization array antenna unit and low section high-isolation mimo antenna - Google Patents
Double polarization array antenna unit and low section high-isolation mimo antenna Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of double polarization array antenna unit, including multiple radiating elements, the first polarization feeding network that connect corresponding with the plurality of radiating element and the second polarization feeding network respectively, multiple feed port that described first polarization feeding network is connected with the plurality of radiating element are the first feed port, multiple feed port that described second polarization feeding network is connected with the plurality of radiating element are the second feed port, wherein, the connected mode of constant amplitude homophase feed is used between adjacent described first feed port, the connected mode of the anti-phase feed of constant amplitude is used between adjacent described second feed port.The embodiment of the invention also discloses a kind of low section high-isolation mimo antenna utilizing above-mentioned double polarization array antenna unit to constitute.Using the present invention can effectively reduce the Outside Dimensions of entirety, manufacturing process is simple, and is effectively improved cross polarization and isolation.
Description
Technical field
The present invention relates to antenna of mobile communication base station field, particularly relate to a kind of double polarization array antenna list
First and low section high-isolation mimo antenna.
Background technology
In moving communicating field, in order to improve anti-multipath jamming ability and promote speech quality, generally
Dual polarized antenna can be used to carry out polarity diversity reception.And generally use vertical in wireless access field
The dual polarized antenna of straight polarization+horizontal polarization constitutes MIMO multichannel, in data transfer rate and diversity reception
Effect has obvious advantage, the space that the key concept of MIMO is provided by utilizing mimo antenna
Degree of freedom effectively promotes the spectrum efficiency of wireless communication system, with promoting transmission rate and improve communication
Quality.
WLAN antenna is owing to frequency is higher and relative frequency narrower bandwidth, and base plate is less, typically now
Oscillator uses the form complex process such as balun, and oscillator height is higher, and general double polarized micro strip antenna
There is the undesirable problem of isolation.
Such as, the Chinese patent of Patent No. CN201220612873.4 discloses the four of a kind of 2.4G
Unit vertical-horizontal dual-polarized antenna vibrator its use L-type probe couple feed microstrip antenna oscillator,
Feeding network uses the microstrip line constant amplitude co-phasing network of bilayer copper clad plate design.But the mode used is deposited
In shortcomings such as isolation poor (only 26dB), assemblings complicated (step is more):
Isolation: the microstrip antenna that described antenna uses, in the case of not taking other measure, is isolated
Degree typically can only achieve about 25dB, cross polarization only have about 20dB and feeding network be constant amplitude with
Phase network, does not improve isolation.
Assembling is complicated, size is bigger than normal: parts are many, feeding network, L-type probe, microband paste, the end
Plates etc., need first to fill feeding network on base plate, be welded to feedback again by L-type probe in an assembling process
On electric network (4 unit 8 times), installing microband paste, number of assembling steps is too many, and causes size bigger than normal.
Same, a kind of dual polarization disclosed in the Chinese patent of Patent No. CN201220489268.2
Mimo antenna battle array is also to there is identical problem.Its oscillator uses barron structure, and oscillator height is about
0.25 wavelength, antenna height is of a relatively high.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of double polarization array antenna unit and low
Section high-isolation mimo antenna, so that overcome cannot in the WLAN mimo antenna of prior art
The problems such as the little mutual coupling of realization, wide bandwidth, small size, unstable properties, reduce the size of antenna,
Reduce the amount of parts of antenna, improve the cross polarization ratio of antenna, isolation index, improving product
Conformity of production.
For achieving the above object, the present invention provides a kind of double polarization array antenna unit, including multiple spokes
Penetrate unit, respectively first polarization feeding network and second pole that connects corresponding with the plurality of radiating element
Change feeding network, multiple feeds that described first polarization feeding network is connected with the plurality of radiating element
Port is the first feed port, and described second polarization feeding network is connected with the plurality of radiating element
Multiple feed port are the second feed port, wherein, use between adjacent described first feed port
The connected mode of constant amplitude homophase feed, uses the anti-phase feedback of constant amplitude between adjacent described second feed port
The connected mode of electricity；It is positioned at described first feedback of distributing point the same side of described first polarization feeding network
Use the connected mode that constant amplitude homophase is series feed between electricity port, be positioned at the feedback of described first polarization feeding network
Constant amplitude is used between described first feed port and described first feed port of opposite side of electricity point side
Homophase the connected mode presented；It is positioned at distributing point the same side described of described second polarization feeding network
Use the connected mode that constant amplitude is anti-phase and presents between the second feed port, be positioned at described second polarization transmission network
Adopt between described second feed port and described second feed port of opposite side of the distributing point side of network
Connected mode that is anti-phase by constant amplitude and that present.
Further, described double polarization array antenna unit is the linear array element of 1*N, described many
Individual radiating element is N number of, and wherein, described N is the even number more than or equal to 2.
Further, described N is 2,4,6 or 8.
Further, when described N is equal to 2, it is positioned at the distributing point of described second polarization feeding network
Described second feed port of side is half ripple with the described second feed port phase contrast of opposite side
Long；When described N is more than 2, it is positioned at distributing point side described of described second polarization feeding network
Second feed port is a wavelength with the described second feed port phase contrast of opposite side.
Further, described double polarization array antenna unit is the antenna using vertical+horizontal polarization mode
Unit, described first polarization feeding network is horizontal polarization feeding network, described second polarization transmission network
Network is vertical polarization feeding network, and described first feed port is horizontal feed port, described second feedback
Electricity port is vertical feed port.
Further, described double polarization array antenna unit is the antenna list using ± 45 ° of polarization modes
Unit, described first polarization feeding network is+45 ° of polarization feeding networks, described second polarization feeding network
For-45 ° of polarization feeding networks, described first feed port is+45 ° of feed port, described second feed end
Mouth is-45 ° of feed port.
Further, the described integrated antenna element of double polarization array antenna unit, the plurality of spoke
Penetrate unit, the first polarization feeding network and the second polarization feeding network and strike out one by aluminium alloy.
Further, each described radiating element is square-shaped metal sheet, and the length of side is 0.5 wavelength.
The present invention also provides for a kind of low section high-isolation mimo antenna, connects including base plate, radio frequency
Device, multiple parasitic element and above-mentioned double polarization array antenna unit, described radio frequency connector is located at institute
Stating the bottom surface of base plate, described double polarization array antenna unit is located at the surface of described base plate, the plurality of
Parasitic element is connected respectively multiple radiating elements of described double polarization array antenna unit.
Further, the plurality of parasitic element, double polarization array antenna unit and base plate pass through metal
Support column realizes connecting and fixing.
Further, described double polarization array antenna unit is 0.02～0.05 wavelength with the distance of base plate,
Described double polarization array antenna unit is 0.05～0.10 wavelength with the distance of the plurality of parasitic element.
Further, the first polarization feeding network and second of described double polarization array antenna unit polarizes
Distributing point on feeding network is respectively by feeding with the weld on described base plate.
Further, each described parasitic element is aluminium alloy disk, uses aluminium alloy punch forming,
And a diameter of 0.4 wavelength.
Use the method have the advantages that
1, double polarization array antenna unit of the present invention and antenna use feeding network and radiating element
Integration, dual polarization design, involved product has that parts are few, manufacturing process simple, cost
The feature such as cheap；
2, in the feeding network of two polarization of double polarization array antenna unit of the present invention and antenna
Use constant amplitude homophase feed between the first feed port, between the second feed port, then use the anti-phase feed of constant amplitude；
Therefore, for any antenna unit, adjacent antenna units work in combination all can be found so that excitation
Main polarization radiation superposition in the same direction, cross polarization radiations is reversely offset simultaneously, and such transmission coefficient S21 is very
Low, improve cross polarization and isolation；
3, use homophase series feed+and present technical method with traditional and present feeding technique method at WLAN
Advantage main on antenna is to reduce size, decreases the line radiation impact for antenna simultaneously；
4, use homophase series feed+and present the feeding network of technical method with traditional and present feeding technique side
Comparing of method, the area that feeding network takies can reduce about half.
The dislocation paraphase feeding technique method involved by this patent is used to feed skill with traditional constant amplitude homophase
Art compares isolation and the cross polarization ratio that can promote antenna.Use dislocation paraphase feeding technique method
The isolation of WLAN antenna can be risen to more than 35dB, axial cross polarization than 30dB with
On, ± 60 ° of cross polarization ratios, at more than 20dB, are much better than the requirement of mobile communication.This patent is main
It is applicable to the frequency range (2.4G frequency range, 5.8G frequency range) of wireless access system, is simultaneously applicable to relatively
Antenna described in the bandwidth double polarized micro strip antenna this patent less than 20% is the polarization side of vertical+level
Formula it can also be used to ± 45 ° polarization dual polarized antennas.
Accompanying drawing explanation
Fig. 1 is the structural representation of the double polarization array antenna unit of first embodiment of the invention；
Fig. 2 is that the structure of the horizontal polarization feeding network of the double polarization array antenna unit shown in Fig. 1 is shown
It is intended to；
Fig. 3 is that the structure of the vertical polarization feeding network of the double polarization array antenna unit shown in Fig. 1 is shown
It is intended to；
Fig. 4 is the structural representation of the single radiating element of the double polarization array antenna unit shown in Fig. 1；
Fig. 5 is the structural representation of the double polarization array antenna unit of second embodiment of the invention；
Fig. 6 is the structural representation of the double polarization array antenna unit of third embodiment of the invention；
Fig. 7 is the structural representation of the double polarization array antenna unit of fourth embodiment of the invention；
Fig. 8 is the structural representation of the double polarization array antenna unit of fifth embodiment of the invention；
The structural representation of a kind of low section high-isolation mimo antenna that Fig. 9 provides for the present invention；
Figure 10 is the side structure schematic diagram of the low section high-isolation mimo antenna shown in Fig. 9；
Figure 11 is the structure schematic diagram of the low section high-isolation mimo antenna shown in Fig. 9
Figure 12 is the structural representation of the parasitic element of the low section high-isolation mimo antenna shown in Fig. 9
Figure.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this
Invention is described in further detail.
The invention provides a kind of double polarization array antenna unit and with this double polarization array antenna list
The low section high-isolation mimo antenna of unit, this double polarization array antenna unit includes that multiple radiation is single
Unit, the respectively first polarization feeding network that connect corresponding with the plurality of radiating element and the second polarization feedback
Electric network, multiple feed port that described first polarization feeding network is connected with the plurality of radiating element
Being the first feed port, described second polarization feeding network is multiple with what the plurality of radiating element was connected
Feed port is the second feed port, wherein, uses constant amplitude between adjacent described first feed port
The connected mode of homophase feed, uses the anti-phase feed of constant amplitude between adjacent described second feed port
Connected mode.This double polarization array antenna unit is the linear array element of 1*N, the plurality of radiation
Unit is N number of, and wherein, described N is the even number more than or equal to 2, such as, described N can be 2,
4,6 or 8.It addition, the described integrated antenna element of double polarization array antenna unit, the plurality of
Radiating element, the first polarization feeding network and the second polarization feeding network strike out one by aluminium alloy.
Multiple embodiments in conjunction with Fig. 1～10 to the double polarization array antenna unit of the present invention and low are cutd open
Face high-isolation mimo antenna is described in detail.
With reference to Fig. 1, for first embodiment of the invention, disclose the double polarization array antenna of a kind of Unit four
Unit 10, and the double polarization array antenna unit of the present embodiment is the sky using vertical+horizontal polarization mode
Line unit, this antenna element is the linear array element of 1*4, and it includes four radiating elements 11, divides
Do not present with horizontal polarization feeding network 12 and the vertical polarization of the described corresponding connection of four radiating elements 11
Electric network 13, four feeds that described horizontal polarization feeding network 12 is connected with described four radiating elements
Port is horizontal feed port 121, described vertical polarization feeding network 13 and described four radiating elements
Four feed port connected are vertical feed port 131.Described four radiating elements 11, level pole
Change feeding network 12 and vertical polarization feeding network 13 by the stamping forming integral antenna of aluminium alloy
Unit.Each described radiating element 11 is square-shaped metal sheet, and the length of side is 0.5 wavelength, described
Four radiating elements 11 are arranged in linear array, as shown in Figure 4 in the way of the length of side is just to the length of side.
Wherein, the connection side of constant amplitude homophase feed is used between adjacent described horizontal feed port 121
Formula, uses the connected mode of the anti-phase feed of constant amplitude between adjacent described vertical feed port 131.
Concrete, shown in 1 and Fig. 2, described four radiating elements 11 include the first radiating element
11a, the second radiating element 11b, the 3rd radiating element 11c and the 4th radiating element 11d, described
In horizontal polarization feeding network 12, described horizontal feed port 121 includes the first horizontal feed port
121a, the second horizontal feed port 121b, the 3rd horizontal feed port 121c and the 4th level feed
Port 121d.Described horizontal polarization feeding network 12 is respectively by described first horizontal feed port 121a
It is connected with described first radiating element 11a, single by the second horizontal feed port 121b and the second radiation
Unit 11b connects, and is connected and logical by the 3rd horizontal feed port 121c and the 3rd radiating element 11c
Cross the 4th horizontal feed port 121d and the 4th radiating element 11d connects.Wherein, described first level
Feed port 121a, the second horizontal feed port 121b, the 3rd horizontal feed port 121c and the 4th
In horizontal feed port 121, two of arbitrary neighborhood connect, such as, in this reality for constant amplitude homophase feed
Execute in example, if the current feed phase of described first horizontal feed port 121a is 90 °, then, described
Two horizontal feed port 121b, the 3rd horizontal feed port 121c and the 4th horizontal feed port 121d
Current feed phase be 90 °.
It addition, described first horizontal feed port 121a and the second horizontal feed port 121b are positioned at water
The side of the distributing point 122 of mean pole feeding network 12, the 3rd horizontal feed port 121c and
Four horizontal feed port 121d are positioned at the opposite side of distributing point 122, wherein, described first level feed
The connected mode that constant amplitude homophase is series feed is used between port 121a and the second horizontal feed port 121b,
Described 3rd horizontal feed port 121c and the 4th horizontal feed port 121d are also adopted by constant amplitude homophase
Series feed connected mode.And be positioned at the side of the distributing point 122 of described horizontal polarization feeding network 12
Described first horizontal feed port 121a, the second horizontal feed port 121b and be positioned at described horizontal polarization
Described 3rd horizontal feed port 121c of the opposite side of the distributing point 122 of feeding network 12, the 4th water
Constant amplitude homophase the connected mode presented is used between flat feed port 121d.
Shown in 1 and Fig. 3, in described vertical polarization feeding network 13, described vertical feed end
Mouthfuls 131 include the first vertical feed port 131a, the second vertical feed port 131b, the 3rd vertically present
Electricity vertical feed port 131d of port 131c and the 4th.Described vertical polarization feeding network 13 is respectively
It is connected, by second with described first radiating element 11a by the described first vertical feed port 131a
Vertical feed port 131b and the second radiating element 11b connect, by the 3rd vertical feed port 131c
It is connected with the 3rd radiating element 11c and by the 4th vertical feed port 131d and the 4th radiating element
11d connects.Wherein, the described first vertical feed port 131a, the second vertical feed port 131b,
In 3rd vertical feed port 131c and the 4th vertical feed port 131, two of arbitrary neighborhood are
Anti-phase feed connects, such as, in the present embodiment, if the described first vertical feed port 131a
Current feed phase is 0 °, then, the current feed phase of the described second vertical feed port 131b is 180,
The current feed phase of the 3rd vertical feed port 131c is 360 ° (being equivalent to 0 °) and the 4th vertical
The current feed phase of feed port 131d is 540 ° (being equivalent to 180 °).
It addition, the described first vertical feed port 131a and the second vertical feed port 131b are positioned at vertical
The side of the distributing point 132 of straight polarization feeding network 13, the 3rd vertical feed port 131c and the
Four vertical feed port 131d are positioned at the opposite side of distributing point 132, and wherein, described first vertically feeds
Use, between vertical feed port 131b of port 131a and second, the connected mode that constant amplitude is anti-phase and presents,
It is anti-phase that described 3rd vertical feed port 131c and the 4th vertical feed port 131d are also adopted by constant amplitude
And the connected mode presented.And be positioned at the side of the distributing point 132 of described vertical polarization feeding network 13
Described first vertical feed port 131a, the second vertical feed port 131b and be positioned at described vertical polarization
Described 3rd vertical feed port 131c of the opposite side of the distributing point 132 of feeding network 13, the 4th hang down
Then use, between straight feed port 131d, the connected mode that constant amplitude is anti-phase and presents.
In the present embodiment, due to the horizontal polarization feeding network of described double polarization array antenna unit 10
Constant amplitude homophase is used to feed between the horizontal port 121 of 12, and the vertical end of vertical polarization feeding network 13
The anti-phase feed of constant amplitude (i.e. dislocation paraphase feed) is used between mouth 131.Therefore, for arbitrary radiating element
Adjacent radiation unit work in combination all can be found so that the main polarization radiation superposition in the same direction of excitation for 11,
Cross polarization radiations is reversely offset simultaneously, and such transmission coefficient S21 is the lowest, improve cross polarization and
Isolation.In being such as connected with vertical polarization feeding network, radiating element can be reduced to current phasor,
This polarization components and heteropolar component can be divided into, owing to radiating element feed placement is contrary, therefore
Cause the superposition of this polarization components, the reverse cancellation of heteropolar component, promote the polarization purity of antenna, reduce
The mutual coupling of two-port, thus reach to improve cross polarization than the purpose improving isolation.
With reference to Fig. 5, for the structural representation of the double polarization array antenna unit of second embodiment of the invention.
Double polarization array antenna unit 20 disclosed in this embodiment and Unit four of the first embodiment shown in Fig. 1
Double polarization array antenna unit 10 structure similar, except for the difference that, the dual-polarized array sky of the present embodiment
Line unit be the double polarization array antenna unit of Unit eight, i.e. antenna element be the linear array list of 1*8
Unit, it include eight radiating elements 21, respectively with the level of the described corresponding connection of eight radiating elements 21
Polarization feeding network 22 and vertical polarization feeding network 23, described horizontal polarization feeding network 22 and institute
Eight feed port stating eight radiating elements connections are horizontal feed port 221, and described vertical polarization is presented
Eight feed port that electric network 23 is connected with described eight radiating elements are vertical feed port 231.
Described eight radiating elements 21, horizontal polarization feeding network 22 and vertical polarization feeding network 23 pass through
Aluminium alloy stamping forming integral antenna unit.
Wherein, the connection side of constant amplitude homophase feed is used between adjacent described horizontal feed port 221
Formula, uses the connected mode of the anti-phase feed of constant amplitude between adjacent described vertical feed port 231.
Described eight radiating elements 21 and horizontal polarization feeding network 22, vertical polarization feeding network 23
Structure, annexation and described horizontal feed port 221, vertical feed port 231 position close
It is basically identical with the double polarization array antenna unit 10 of the first embodiment shown in Fig. 1, omits at this
Describe in detail.
With reference to Fig. 6, for the structural representation of the double polarization array antenna unit of third embodiment of the invention.
Double polarization array antenna unit 30 disclosed in this embodiment and Unit four of the first embodiment shown in Fig. 1
Double polarization array antenna unit 10 structure similar, except for the difference that, the dual-polarized array sky of the present embodiment
Line unit be the double polarization array antenna unit of Unit two, i.e. antenna element be the linear array list of 1*2
Unit, it includes two radiating elements 31, the level of connection corresponding with said two radiating element 31 respectively
Polarization feeding network 32 and vertical polarization feeding network 33, described horizontal polarization feeding network 32 and institute
Two feed port stating two radiating elements connections are horizontal feed port 321, and described vertical polarization is presented
Two feed port that electric network 33 is connected with said two radiating element are vertical feed port 331.
Said two radiating element 31, horizontal polarization feeding network 32 and vertical polarization feeding network 33 pass through
Aluminium alloy stamping forming integral antenna unit.
Wherein, the connection side of constant amplitude homophase feed is used between adjacent described horizontal feed port 321
Formula, uses the connected mode of the anti-phase feed of constant amplitude between adjacent described vertical feed port 331.
Said two radiating element 31 and horizontal polarization feeding network 32, vertical polarization feeding network 33
Structure, annexation and described horizontal feed port 321, vertical feed port 331 position close
It is basically identical with the double polarization array antenna unit 10 of the first embodiment shown in Fig. 1, except for the difference that,
Be positioned at described vertical polarization feeding network 33 distributing point 332 side vertical feed port 331a with
The vertical feed port 331b phase contrast of opposite side is half wavelength rather than a wavelength.
With reference to Fig. 7, for the structural representation of the double polarization array antenna unit of fourth embodiment of the invention.
Double polarization array antenna unit 40 disclosed in this embodiment and Unit four of the first embodiment shown in Fig. 1
Double polarization array antenna unit 10 structure similar, except for the difference that, dual-polarized array disclosed in embodiment
Antenna element 40 is the antenna element using ± 45 ° of polarization modes, and this antenna element is also the line of 1*4
Property array element, it include four radiating elements 41, respectively corresponding with described four radiating elements 41 even
+ 45 ° of polarization feeding networks 42 connect and-45 ° of polarization feeding networks 43, described+45 ° of polarization feeds
Four feed port that network 42 is connected with described four radiating elements are+45 ° of feed port 421, institute
State-45 ° of polarization four feed port being connected with described four radiating elements of feeding networks 43 and be-45 °
Feed port 431.Described four radiating elements 41 ,+45 ° polarization feeding network 42 and-45 ° of polarization
Feeding network 43 is by aluminium alloy stamping forming integral antenna unit.
Wherein, the connection side of constant amplitude homophase feed is used between adjacent described+45 ° of feed port 421
Formula, uses the connected mode of the anti-phase feed of constant amplitude between adjacent described-45 ° of feed port 431.
Described four radiating elements 41 and+45 ° of polarization feeding network 42 ,-45 ° polarization feeding networks
Structure, annexation and the position of described+45 421 ,-45 ° of feed port 431 of feed port of 43
Relation of putting is basically identical, at this with the double polarization array antenna unit 10 of the first embodiment shown in Fig. 1
Omit and describe in detail.
With reference to Fig. 8, for the structural representation of the double polarization array antenna unit of fifth embodiment of the invention.
This antenna element is also the linear array element of 1*4, it include four radiating elements 51, respectively with institute
State corresponding+45 ° of polarization feeding networks 52 connected of four radiating elements 51 and-45 ° of polarization transmission networks
Network 53, four feed ends that described+45 ° of polarization feeding networks 52 are connected with described four radiating elements
Mouth is+45 ° of feed port 521, described-45 ° of polarization feeding networks 53 and described four radiating elements
Four feed port connected are-45 ° of feed port 531.Described four radiating elements 51 ,+45 °
Polarization feeding network 52 and-45 ° of polarization feeding networks 53 are by aluminium alloy stamping forming integration sky
Line unit.
Double polarization array antenna unit 50 disclosed in the present embodiment and four of the 4th embodiment shown in Fig. 7
Double polarization array antenna unit 40 structure of unit is similar, except for the difference that, and Unit four of the 4th embodiment
Four radiating elements 41 of double polarization array antenna unit 40 arrange in the way of the length of side is just to the length of side
Linear array, and four radiating elements 51 of double polarization array antenna unit 50 disclosed in the present embodiment
It is arranged in linear array in the way of positive diagonal angle, angle.
Wherein, the connection side of constant amplitude homophase feed is used between adjacent described+45 ° of feed port 521
Formula, uses the connected mode of the anti-phase feed of constant amplitude between adjacent described-45 ° of feed port 531.
Described four radiating elements 51 and+45 ° of polarization feeding network 52 ,-45 ° polarization feeding networks
Structure, annexation and the position of described+45 521 ,-45 ° of feed port 531 of feed port of 53
Relation of putting is basically identical, at this with the double polarization array antenna unit 10 of the first embodiment shown in Fig. 1
Omit and describe in detail.
With reference to Fig. 9～12, for the low section high-isolation mimo antenna of an embodiment of the present invention, bag
Include base plate 1, radio frequency connector 6, multiple parasitic element 3 and double polarization array antenna unit 2, institute
Stating radio frequency connector 6 and be located at the bottom surface of described base plate 1, described double polarization array antenna unit 2 is located at
The surface of described base plate 1, the plurality of parasitic element 3 is connected respectively described dual-polarized array sky
Multiple radiating elements of line unit 2.Two kinds of polarised directions of described double polarization array antenna unit 2
The distributing point of feeding network is respectively by welding feed with the joint 1a on described base plate 1, such as Figure 11 institute
Show.
Concrete, each described parasitic element 3 is aluminium alloy disk, uses aluminium alloy punch forming,
And a diameter of 0.4 wavelength, as shown in figure 12.And each parasitic element 3, double polarization array antenna
Unit 2 and base plate 1 realize connecting and fixing, as shown in Figure 10 by metal support column 4,5.Its
In, described double polarization array antenna unit 2 is 0.02～0.05 wavelength with the distance of base plate 1, described double
Polarization array antenna unit 2 is 0.05～0.10 wavelength with the distance of each parasitic element 3.Therefore,
Antenna height only has about 0.1 wavelength in the case of not calculating outer housing, far below general antenna oscillator
0.25 wavelength.
Concrete, described double polarization array antenna unit 2 can for above-mentioned any embodiment described by pair
Polarization array antenna unit, such as, in the mimo antenna of the present embodiment, described dual-polarized array
Antenna element 2 have employed the double polarization array antenna unit of Unit four of the first embodiment shown in Fig. 1
10.It is to be understood that, in the mimo antenna of the present embodiment, it is possible to use other embodiments
Double polarization array antenna unit.
In sum, use the method have the advantages that
1, double polarization array antenna unit of the present invention and antenna use feeding network and radiating element
Integration, dual polarization design, involved product has that parts are few, manufacturing process simple, cost
The feature such as cheap；
2, in the feeding network of two polarization of double polarization array antenna unit of the present invention and antenna
Use constant amplitude homophase feed between the first feed port, between the second feed port, then use the anti-phase feed of constant amplitude；
Therefore, for any antenna unit, adjacent antenna units work in combination all can be found so that excitation
Main polarization radiation superposition in the same direction, cross polarization radiations is reversely offset simultaneously, and such transmission coefficient S21 is very
Low, improve cross polarization and isolation；
3, use homophase series feed+and present technical method with traditional and present feeding technique method at WLAN
Advantage main on antenna is to reduce size, decreases the line radiation impact for antenna simultaneously；
4, use homophase series feed+and present the feeding network of technical method with traditional and present feeding technique side
Comparing of method, the area that feeding network takies can reduce about half.
The dislocation paraphase feeding technique method involved by this patent is used to feed skill with traditional constant amplitude homophase
Art compares isolation and the cross polarization ratio that can promote antenna.Use dislocation paraphase feeding technique method
The isolation of WLAN antenna can be risen to more than 35dB, axial cross polarization than 30dB with
On, ± 60 ° of cross polarization ratios, at more than 20dB, are much better than the requirement of mobile communication.This patent is main
It is applicable to the frequency range (2.4G frequency range, 5.8G frequency range) of wireless access system, is simultaneously applicable to relatively
Antenna described in the bandwidth double polarized micro strip antenna this patent less than 20% is the polarization side of vertical+level
Formula it can also be used to ± 45 ° polarization dual polarized antennas.
Above disclosed only one preferred embodiment of the present invention, can not limit with this certainly
The interest field of the present invention, the equivalent variations therefore made according to the claims in the present invention, still belong to the present invention
The scope contained.
Claims (13)
1. a double polarization array antenna unit, it is characterized in that, including multiple radiating elements, the first polarization feeding network that connect corresponding with the plurality of radiating element and the second polarization feeding network respectively, multiple feed port that described first polarization feeding network is connected with the plurality of radiating element are the first feed port, multiple feed port that described second polarization feeding network is connected with the plurality of radiating element are the second feed port, wherein, the connected mode of constant amplitude homophase feed is used between adjacent described first feed port, the connected mode of the anti-phase feed of constant amplitude is used between adjacent described second feed port；
Use the connected mode that constant amplitude homophase is series feed between described first feed port of the distributing point the same side being positioned at described first polarization feeding network, between described first feed port and described first feed port of opposite side of the distributing point side of described first polarization feeding network, use constant amplitude homophase the connected mode presented；
Use, between described second feed port of the distributing point the same side being positioned at described second polarization feeding network, the connected mode that constant amplitude is anti-phase and presents, use, between described second feed port and described second feed port of opposite side of the distributing point side of described second polarization feeding network, the connected mode that constant amplitude is anti-phase and presents.
2. double polarization array antenna unit as claimed in claim 1, it is characterised in that described double polarization array antenna unit is the linear array element of 1*N, and the plurality of radiating element is N number of, and wherein, described N is the even number more than 2.
3. double polarization array antenna unit as claimed in claim 2, it is characterised in that described N is 4,6 or 8.
4. double polarization array antenna unit as claimed in claim 2, it is characterised in that described second feed port of distributing point side being positioned at described second polarization feeding network is a wavelength with the described second feed port phase contrast of opposite side.
5. the double polarization array antenna unit as described in any one of claim 2～4, it is characterized in that, described double polarization array antenna unit is the antenna element using vertical+horizontal polarization mode, described first polarization feeding network is horizontal polarization feeding network, described second polarization feeding network is vertical polarization feeding network, described first feed port is horizontal feed port, and described second feed port is vertical feed port.
6. double polarization array antenna unit as claimed in claim 1, it is characterized in that, described double polarization array antenna unit is the antenna element using ± 45 ° of polarization modes, described first polarization feeding network is+45 ° of polarization feeding networks, described second polarization feeding network is-45 ° of polarization feeding networks, described first feed port is+45 ° of feed port, and described second feed port is-45 ° of feed port.
7. double polarization array antenna unit as claimed in claim 1, it is characterized in that, the described integrated antenna element of double polarization array antenna unit, the plurality of radiating element, the first polarization feeding network and the second polarization feeding network strike out one by aluminium alloy.
8. double polarization array antenna unit as claimed in claim 1, it is characterised in that each described radiating element is square-shaped metal sheet, and the length of side is 0.5 wavelength.
9. one kind low section high-isolation mimo antenna, it is characterized in that, including base plate, radio frequency connector, multiple parasitic element and the double polarization array antenna unit as according to any one of claim 1～8, described radio frequency connector is located at the bottom surface of described base plate, described double polarization array antenna unit is located at the surface of described base plate, and the plurality of parasitic element is connected respectively multiple radiating elements of described double polarization array antenna unit.
Low section high-isolation mimo antenna the most as claimed in claim 9, it is characterised in that the plurality of parasitic element, double polarization array antenna unit and base plate realize connecting and fixing by metal support column.
The 11. low section high-isolation mimo antenna as described in claim 9 or 10, it is characterized in that, described double polarization array antenna unit is 0.02～0.05 wavelength with the distance of base plate, and described double polarization array antenna unit is 0.05～0.10 wavelength with the distance of the plurality of parasitic element.
12. low section high-isolation mimo antenna as claimed in claim 9, it is characterised in that the distributing point on the first polarization feeding network of described double polarization array antenna unit and the second polarization feeding network is respectively by feeding with the weld on described base plate.
13. low section high-isolation mimo antenna as claimed in claim 9, it is characterised in that each described parasitic element is aluminium alloy disk, use aluminium alloy punch forming, and a diameter of 0.4 wavelength.
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| CN201410160554.8A CN103956587B (en) | 2014-04-21 | 2014-04-21 | Double polarization array antenna unit and low section high-isolation mimo antenna |
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| CN107078402B (en) * | 2015-09-30 | 2020-02-14 | 华为技术有限公司 | Beam forming method and device |
| CN105356049B (en) * | 2015-11-11 | 2019-07-19 | 珠海纳睿达科技有限公司 | A kind of direct connection Double-polarization micro-strip array antenna |
| CN205319307U (en) | 2015-12-16 | 2016-06-15 | 华为技术有限公司 | Planar array antenna and communication equipment |
| KR102342978B1 (en) * | 2018-01-19 | 2021-12-24 | 삼성전자 주식회사 | An antenna module including insulator and a base station including the antenna module |
| CN110061353B (en) * | 2019-04-22 | 2020-07-31 | 东南大学 | Miniaturized Ku full-band satellite antenna array |
| CN114447579A (en) * | 2021-06-04 | 2022-05-06 | 中兴通讯股份有限公司 | Antenna element and antenna array |
| CN114449650A (en) * | 2021-12-13 | 2022-05-06 | 西安电子科技大学 | Single base station positioning method based on 5G |
| CN114188715A (en) * | 2021-12-31 | 2022-03-15 | 深圳市道通智能汽车有限公司 | Microstrip antenna and millimeter wave radar |
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