CN105449378B - Dual-polarization antenna apparatus - Google Patents
Dual-polarization antenna apparatus Download PDFInfo
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- CN105449378B CN105449378B CN201410394725.3A CN201410394725A CN105449378B CN 105449378 B CN105449378 B CN 105449378B CN 201410394725 A CN201410394725 A CN 201410394725A CN 105449378 B CN105449378 B CN 105449378B
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- 239000000758 substrate Substances 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims 2
- 238000004891 communication Methods 0.000 abstract description 12
- 230000009977 dual effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 230000010287 polarization Effects 0.000 description 9
- 230000005855 radiation Effects 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a kind of dual-polarization antenna apparatus, which includes：The asymmetric dipole antenna unit of orthogonally located two couple；Wherein, each pair of asymmetric dipole antenna unit includes two dipoles, and each dipole has unequal two arms of length.The dual-polarization antenna apparatus of the present invention has good broadband, low section characteristic, and provides the antenna pattern stablized in bandwidth of operation, to be adapted to the antenna for base station of different wireless communication systems.
Description
Technical field
The present invention relates to antenna technical fields, more particularly to are applied to dual-polarization antenna apparatus.
Background technology
Now, almost everyone has a mobile phone, mobile phone to be not limited only to voice data transmission, it is also necessary to pass
Defeated high-definition picture or multimedia.This requirement has very high data rate to all users.This guiding mobile communication service
The LTE of exploitation and recent decades from 2G to 3G.The effective solution for improving data rate is that increasing wireless communication answers
Bandwidth.On the other hand, in order to increase channel capacity, to reduce the quantity of antenna element and minimize the peace of antenna for base station
Region is filled, most viable solution is the technology using polarity diversity.Therefore, use broadband double in a wireless communication system
Poliarizing antenna disclosure satisfy that above-mentioned requirements.
Inventor in the implementation of the present invention, it is found that broadband dual polarized antenna in the prior art exists as follows not
Foot：Broadband, low section characteristic are still not ideal enough, and the antenna pattern in bandwidth of operation is not sufficiently stable, and cannot be adapted to
The antenna for base station of different wireless communication systems.
Invention content
The embodiment of the present invention provides a kind of dual-polarization antenna apparatus, to have good broadband, low section characteristic, and
The antenna pattern stablized in bandwidth of operation, to be adapted to the antenna for base station of different wireless communication systems, the dual polarization are provided
Antenna assembly includes：
The asymmetric dipole antenna unit of orthogonally located two couple；Wherein, each pair of asymmetric dipole antenna unit includes
Two dipoles, each dipole have unequal two arms of length.
In one embodiment, the subtended angle between two arms of each dipole is not equal to 180 °.
In one embodiment, the longer arm of all dipoles is physically connected to each other.
In one embodiment, the open end of each dipole adds stub.
In one embodiment, it is also associated between the output port of each dipole and the output port of power divider
Balanced to unbalanced transformer, the balanced to unbalanced transformer physically support connected dipole, and for impedance matching with the company of excitation
The dipole connect.
In one embodiment, the balanced to unbalanced transformer is conical by its shape, and the smaller one end in cross section supports connected idol
It is extremely sub.
In one embodiment, the balanced to unbalanced transformer is obliquely outward positioned on ground plane, and the balance turns
Ground plane on the inside of parallel operation is equipped with rectangular channel.
In one embodiment, the height of the dual-polarization antenna apparatus is 0.22 λ, and wherein λ is oneself at 2.2GHz frequencies
By space wavelength.
Dual-polarization antenna apparatus in the embodiment of the present invention includes the asymmetric dipole antenna list of orthogonally located two couple
Member, wherein each pair of asymmetric dipole antenna unit includes two dipoles, each dipole has unequal two of length
Arm so that the dual-polarization antenna apparatus has good broadband, low section characteristic, and provides the radiation stablized in bandwidth of operation
Directional diagram, to be adapted to the antenna for base station of different wireless communication systems.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.In the accompanying drawings：
Fig. 1 to Fig. 5 shows that the dual-polarization antenna apparatus for developing into the embodiment of the present invention by conventional dipole sub-antenna shows
It is intended to；
Fig. 6 is the vertical view exemplary plot of dual-polarization antenna apparatus in the embodiment of the present invention；
Fig. 7 is the schematic diagram of balanced to unbalanced transformer in the embodiment of the present invention；
Fig. 8 is the vertical view of balanced to unbalanced transformer in the embodiment of the present invention；
Fig. 9 is the upward view of balanced to unbalanced transformer in the embodiment of the present invention；
Figure 10 is the schematic diagram of feeding network in the embodiment of the present invention；
Figure 11 is the vertical view exemplary plot of dual polarized antenna in the embodiment of the present invention；
Figure 12 is the side view exemplary plot of dual polarized antenna in the embodiment of the present invention；
Figure 13 is S in the embodiment of the present invention11And S22Simulation result diagram relative to frequency；
Figure 14 is S in the embodiment of the present invention21Simulation result diagram relative to frequency；
Figure 15 and Figure 16 is the radiation diagram of dual polarized antenna in the embodiment of the present invention.
Specific implementation mode
Understand in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the accompanying drawings to this hair
Bright embodiment is described in further details.Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
For inventor it is considered that the brachium of conventional dipole sub-antenna is equal, this so that the broadband of antenna, low section are special
Property is not ideal enough, and the antenna pattern in bandwidth of operation is not sufficiently stable, and cannot be adapted to the base of different wireless communication systems
Station antenna, therefore a kind of dual-polarization antenna apparatus is provided in embodiments of the present invention, which includes orthogonal put
The asymmetric dipole antenna unit of two couples set, wherein each pair of asymmetric dipole antenna unit includes two dipoles, each
There is dipole unequal two arms of length, this configuration the dual-polarization antenna apparatus can be made to have good broadband, low
Section characteristic, and the antenna pattern stablized in bandwidth of operation is provided, to be adapted to the base station day of different wireless communication systems
Line is specially adapted to LTE base station antenna.
When it is implemented, in the dual-polarization antenna apparatus of the embodiment of the present invention, two pairs of asymmetric dipole antenna units are just
It hands over and places, dual polarization may be implemented.The dual-polarization antenna apparatus of the embodiment of the present invention is enhancing broadband characteristics, and it is non-right to have used
The dipole arm length of title controls antenna impedance.Specifically, each pair of asymmetric dipole antenna unit includes two dipoles,
Each dipole includes two arms, and one of arm is shorter, another arm is longer.This is equal with the brachium of conventional dipole sub-antenna
It is different.
Fig. 1 to Fig. 5 shows that the dual-polarization antenna apparatus for developing into the embodiment of the present invention by conventional dipole sub-antenna shows
It is intended to.It is traditional director in Fig. 1, it can be seen that the length of two arms 1 and 2 of dipole is identical.It is in this way
There is excellent radiation characteristic, dipole should be placed on 0.25 λ that is above the ground level0.Fig. 2 is the dual polarization of the embodiment of the present invention
The dipole schematic diagram of antenna assembly, it can be seen that the length of two arms 3 and 4 of dipole is unequal.
It is largely that the geometry of plane is similar with conventional dipole, the dipole in the embodiment of the present invention can also be
The geometry of plane, the geometry of the plane refer to that two arms of dipole extend on straight line, i.e. dipole
Subtended angle between two arms is equal to 180 °.In one embodiment, in order to reduce it is highly advantageous, dipole can also be made to have
The geometry of bending, when implementation each dipole two arms between subtended angle be not equal to 180 °.As shown in figure 3, by dipole
Two arms 3 and 5 of son are bent.The dipole arm curved shape of dual-polarization antenna apparatus can be such that dual-polarization antenna apparatus has
The characteristic of standby low section, the dipole after two brachiocylloosis, which is placed on ground plane, can make dual-polarization antenna apparatus provide band
There is the directional radiation of low section characteristic.And the curved shape of dipole arm can reduce antenna height, so as in design day
When linear array, lowers the integral thickness of antenna significantly, be particularly conducive on the Antenna Design for possessing electric conditioning function.
In order to have a pair of asymmetrical dipole element, structure shown in Fig. 4 is provided, a pair of asymmetric idol is provided in Fig. 4
Pole sub-antenna unit, two of which dipole, a dipole have unequal two arms 3 and 5 of length, another dipole
With unequal two arms 7 and 6 of length；The structure not only realizes low section, but also has broadband character.
The above-mentioned asymmetric dipole antenna unit of orthogonally located two couple, each pair of asymmetric dipole antenna unit include two
There is unequal two arms of length, the structure dual-polarization antenna apparatus impedance bandwidth to be made to increase for a dipole, each dipole,
And provide the antenna pattern stablized in bandwidth of operation.In embodiment, not only two arm lengths of dipole are unequal, Er Qiesuo
There is the longer arm of dipole that can physically be connected to each other.
When it is implemented, can also be connected between the output port of each dipole and the output port of power divider
Balanced to unbalanced transformer (printed balun), balanced to unbalanced transformer physically can support connected dipole, and be used for impedance
It is equipped with and excites connected dipole.The asymmetric idol of a pair for the balanced to unbalanced transformer that it is 8 and 9 with reference numeral that Fig. 5, which is shown,
Pole sub-antenna unit, the same Fig. 4 of remaining mark meaning.When dipole is connected to power divider by balanced to unbalanced transformer, Ke Yiti
It for better impedance matching and realizes linear polarization, realizes the broad band performance of dual-polarization antenna apparatus.Balance turns in embodiment
Unmatched impedance transformation can be 50 Europe by parallel operation, to excite connected dipole.
Balanced to unbalanced transformer can be taper in embodiment, and the smaller one end in cross section supports connected dipole.
Fig. 6 is the vertical view exemplary plot of dual-polarization antenna apparatus in the embodiment of the present invention.In Fig. 6, dipole 10 and 12 can
Realize that the polarization in a direction, dipole 11 and 13 can realize the polarization in another direction.As a part for connection, Fig. 7
For the schematic diagram of balanced to unbalanced transformer in the embodiment of the present invention.14,15,16 and of balanced to unbalanced transformer of four tapers is shown in Fig. 7
17.The vertical view of balanced to unbalanced transformer is shown in Fig. 8.Metal micro-strip line 18 is positioned at the top of printed circuit board 19.Its middle-end
Mouth 20 is uneven port, and port 21 is a balance ports.The upward view of balanced to unbalanced transformer is shown in Fig. 9.Metal connects
Ground wire 22 is positioned at the lower section of printed circuit board 19.Its middle port 20 is uneven port, and port 21 is a balance ports.
When it is implemented, stub can be added in the open end of each dipole.For feeding network, in dipole
The stub of open end load is used to widen the impedance of antenna, in order to realize wide bandwidth operation.Figure 10 is that the present invention is implemented
The schematic diagram of feeding network in example.Figure 10 includes wideband power distributor 23 and 24 and stub 25 and 26, the feed
Network can realize S on the frequency band of 1.70GHz to 2.80GHz11<The wider impedance bandwidth of -15dB.Meanwhile in work frequency
It is 4-6deg to take unbalance in phase.
When it is implemented, balanced to unbalanced transformer can be obliquely outward positioned on ground plane, and on the inside of balanced to unbalanced transformer
Ground plane on can set rectangular channel.Figure 11 is the vertical view exemplary plot of dual polarized antenna in the embodiment of the present invention.Figure 12 is this
The side view exemplary plot of dual polarized antenna in inventive embodiments.Rectangular channel is set on ground plane in Figure 12 on the inside of balanced to unbalanced transformer
S3, flow away to avoid electric current.Parameter values in Figure 11 and Figure 12 about antenna size and substrate can be found in table one and table two.
Table one
| Parameter | Lg | Wg | L1 | L2 | L3 | L4 | S1 |
| Numerical value/mm | 160 | 160 | 14 | 2.0 | 29.50 | 60 | 11.8 |
| Numerical value/λ0 | 1.173 | 1.173 | 0.103 | 0.015 | 0.216 | 0.440 | 0.087 |
| Parameter | S2 | S3 | W1 | W2 | W3 | W4 | h1 |
| Numerical value/mm | 1.0 | 1.35 | 0.21 | 0.4 | 0.46 | 1.95 | 2.8 |
| Numerical value/λ0 | 0.007 | 0.010 | 0.002 | 0.003 | 0.003 | 0.014 | 0.021 |
| Parameter | h2 | h3 | h4 | H | |||
| Numerical value/mm | 5.2 | 1.6 | 0.81 | 30.41 | |||
| Numerical value/λ0 | 0.038 | 0.012 | 0.006 | 0.223 |
Table two
| Substrate | Dielectric constant | Loss factor | Thickness/mm |
| FR4 | 4.4 | 0.02 | 1.6 |
| Taconic RF-60 | 6.15 | 0.0028 | 0.81 |
| Duroid 6010 | 10.2 | 0.0023 | 1.27 |
The dual-polarization antenna apparatus of the embodiment of the present invention is emulated using HFSS softwares, Figure 13 is the embodiment of the present invention
Middle S11And S22Simulation result relative to frequency.Simulation result shows that the dual-polarization antenna apparatus of the embodiment of the present invention is in port
Impedance bandwidth (S with about 48.55% (1.70~2.79GHz) at 111<- 10dB), and have about 47.87% at port 2
Impedance bandwidth (the S of (1.70~2.77GHz)22<-10dB).Bandwidth at the two ports covers LTE working frequency models
It encloses.
Figure 14 is S in the embodiment of the present invention21Simulation result relative to frequency.As can be seen from Figure 14 isolation, increasing
The relationship of benefit and frequency, the isolation between middle port 1 and port 2 is better than 40dB, and realizes and stablize on bandwidth of operation
Gain (changes) from 7.53dBi to 9dBi.
Figure 15 and Figure 16 is provided respectively for horizontal plane and vertical plane port 1 and port 2, in 1.71GHz, 2.2GHz and
The simulation radiation diagram of 2.69GHz excitation antenna elements.As shown in Figure 15 and Figure 16, cross-pole can be realized for all in the case of
Change, and front and back ratio is less than -20dB and is higher than 18dB.Importantly, radiation diagram is stable on working band.
When it is implemented, the dual-polarization antenna apparatus in the embodiment of the present invention is low section, highly can be 0.22 λ,
Wherein λ is the free space wavelength at 2.2GHz frequencies.Compared with conventional dipole sub-antenna, the dual polarization in the embodiment of the present invention
Antenna assembly height is reduced.
In conclusion 2G, 3G and LTE need broadband dual polarized antenna to adapt to several wireless communication systems, the present invention
Dual-polarization antenna apparatus in embodiment has good broadband, low section and dual-polarized characteristic, can with low-cross polarization,
Symmetric radiation and the constant gain in operating frequency range, and the antenna pattern stablized in bandwidth of operation is provided, very
It is suitable for modern wireless communication systems, is adapted to the antenna for base station of different wireless communication systems, is particularly suitable for LTE bases
Station antenna.
In addition, the dual-polarization antenna apparatus in the embodiment of the present invention has on wide impedance bandwidth and working frequency band surely
Fixed gain, this not only allows for preferably fabrication tolerance, but also can reduce the quantity of antenna used, and reduce antenna at
This.Also, the low section of dual-polarization antenna apparatus will make antenna easy for installation, more attractive；Dual polarization simultaneously can pass through polarization
Diversity improves communication quality.Therefore, the dual-polarization antenna apparatus in the embodiment of the present invention will have huge market in future.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection domain of invention.
Claims (4)
1. a kind of dual-polarization antenna apparatus, which is characterized in that including：
The asymmetric dipole antenna unit of orthogonally located two couple；Wherein, each pair of asymmetric dipole antenna unit includes two
Dipole, each dipole have unequal two arms of length；
Two arms of each dipole are located on the face of substrate；Between two arms of each dipole be located at perpendicular to
Subtended angle on the face of substrate is not equal to 180 °；
Balanced to unbalanced transformer is also associated between the output port of each dipole and the output port of power divider, it is described flat
Weighing apparatus converter physically supports connected dipole, and for impedance matching to excite connected dipole；Wherein, it puts down
Unmatched impedance transformation is 50 Europe by weighing apparatus converter, to excite connected dipole；The balanced to unbalanced transformer is cone shape
Shape, the smaller one end in cross section support connected dipole；
The height of the dual-polarization antenna apparatus is 0.22 λ, and wherein λ is the free space wavelength at 2.2GHz frequencies.
2. dual-polarization antenna apparatus as described in claim 1, which is characterized in that the longer arm of all dipoles is physically
It is connected to each other.
3. dual-polarization antenna apparatus as described in claim 1, which is characterized in that the open end of each dipole adds cutting back
Line.
4. dual-polarization antenna apparatus as described in claim 1, which is characterized in that the balanced to unbalanced transformer is obliquely outward placed
On ground plane, and the ground plane on the inside of the balanced to unbalanced transformer is equipped with rectangular channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410394725.3A CN105449378B (en) | 2014-08-12 | 2014-08-12 | Dual-polarization antenna apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394725.3A CN105449378B (en) | 2014-08-12 | 2014-08-12 | Dual-polarization antenna apparatus |
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| CN105449378A CN105449378A (en) | 2016-03-30 |
| CN105449378B true CN105449378B (en) | 2018-11-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10141635B2 (en) * | 2016-11-14 | 2018-11-27 | Antwave Technology Limited | Systems, apparatus, and methods to optimize antenna performance |
| EP3714508A1 (en) * | 2018-01-24 | 2020-09-30 | Snap Inc. | Hybrid antenna system for wearable devices |
| CN109037937A (en) * | 2018-08-06 | 2018-12-18 | 北方工业大学 | Wide-beam circularly polarized antenna applied to satellite positioning |
| EP4033604A1 (en) * | 2021-01-25 | 2022-07-27 | Nokia Shanghai Bell Co., Ltd. | Dipole antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916910A (en) * | 2010-07-08 | 2010-12-15 | 华为技术有限公司 | Base station antenna unit and base station antenna |
| CN203644952U (en) * | 2013-12-02 | 2014-06-11 | 江苏捷士通射频系统有限公司 | Dual polarization radiation unit and antenna |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI252608B (en) * | 2005-06-17 | 2006-04-01 | Ind Tech Res Inst | Dual-band dipole antenna |
| TWI474560B (en) * | 2011-01-10 | 2015-02-21 | Accton Technology Corp | Asymmetric dipole antenna |
| CN102800929B (en) * | 2012-07-02 | 2016-05-25 | 广东通宇通讯股份有限公司 | A kind of radiating element and corresponding aerial array |
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2014
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916910A (en) * | 2010-07-08 | 2010-12-15 | 华为技术有限公司 | Base station antenna unit and base station antenna |
| CN203644952U (en) * | 2013-12-02 | 2014-06-11 | 江苏捷士通射频系统有限公司 | Dual polarization radiation unit and antenna |
Non-Patent Citations (1)
| Title |
|---|
| 宽带小型化扼流结构及其天线应用研究;杨校伟;《中国优秀硕士学位论文全文数据库 信息科技辑》;20131215(第S2期);正文第38-41页及图3-20、图3-21 * |
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