CN101483277B - Triple polarized conformal antenna - Google Patents
Triple polarized conformal antenna Download PDFInfo
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- CN101483277B CN101483277B CN2008102475550A CN200810247555A CN101483277B CN 101483277 B CN101483277 B CN 101483277B CN 2008102475550 A CN2008102475550 A CN 2008102475550A CN 200810247555 A CN200810247555 A CN 200810247555A CN 101483277 B CN101483277 B CN 101483277B
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- 239000000758 substrate Substances 0.000 claims abstract description 45
- 230000005404 monopole Effects 0.000 claims abstract description 28
- 230000010287 polarization Effects 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000009977 dual effect Effects 0.000 abstract description 12
- 238000002955 isolation Methods 0.000 abstract description 8
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000005684 electric field Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
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Abstract
A three polarization conformal antenna belongs to the multi-input and multi-output antennae technique field characterized in that the antennae is overlappingly composed of a medium substrate 1 and a medium substrate 2, a dual polarization round patch is attached on the surface of the substrate, two H shape seams are located on a grounding plane between two substrates, a coupling feed is performed between the dual polarization round patch and two microstrip feed lines, the two microstip feed lines are on the lower surface of the substrate 2 and respectively under the two H shape seams, orthogonal polarization of two directions parallel with X axis and Y axis is formed by the feed mode, the two H shape seams are placed in a T shape for improving the isolation of the two seams, a disk loading monopole antenna is added to the round patch center, and the performance characteristic that a parallel inductance improves the antennae is induced so as to form a polarization direction parallel with the Z axis. The invention has advantages of high strength, good concealment and little occupation space.
Description
Technical field
The invention belongs to the technical field of three poliarizing antennas in the multiple-input and multiple-output mimo wireless communication technology.
Background technology
The mimo wireless communication Study on Technology is an important content of current wireless Communication Studies.The core concept of mimo system is to use a plurality of antennas simultaneously at communication system transmitter and receiver two ends, and the spatial degrees of freedom that makes full use of wireless multipath channel is to improve power system capacity and transmission rate.The MIMO technology is considered to be in the strong solution that realizes ever-increasing capacity requirement in the environment of rich multipath.The breadboard researcher of Bell shows that to the research work of mimo system mimo system has the ability that the power system capacity of making significantly improves, if transmitting antenna is M, accepting antenna is N, then power system capacity can reach a single aerial system min (M, N) doubly.
All mention the mimo system of linear monopole array in many articles of having delivered, multi-polarization antenna has then just begun to receive publicity.Andrews et al. mentions in his literary composition, and in complicated multi-path environment, the antenna with multipolarization character can improve the radio communication channel capacity.A.S.Konanur proposes a kind of vector antenna that is made up of annulus and dipole in his literary composition, result of study shows that multi-polarization antenna MIMO array is bigger than the channel capacity of the single-polarized antenna array of same antenna unit number.Because coefficient correlation is very low between the branch of different polarised directions, can regard separate transceiver channel as fully.Therefore, multi-polarization antenna can utilize volume still less to realize the independent multipath passage of more statistics, thereby improves power system capacity and transmission rate effectively.
Three poliarizing antennas make full use of three mutually orthogonal characteristics of direction of principal axis of space coordinates, design three orthogonal direction polarization, in limited volume, realize three independently transceiver channels.Das et al. works out a kind of three poliarizing antennas that are made up of dual polarization circular patch and monopole.Gray et al. has introduced a kind of three poliarizing antennas that are made up of dual polarization dielectric resonator and monopole in his literary composition.Itoh et al. has then proposed a kind of three poliarizing antennas that are made up of two vertical clearance gap and monopole.
Summary of the invention
Existing three poliarizing antennas have all adopted stereochemical structure, and this makes their range of application receive suitable restriction.
The object of the present invention is to provide the three polarization conformal antennas that a kind of intensity is high, profile is hidden, occupy little space.
Simultaneously, in order to improve the isolation between each port, the present invention proposes the method that adopts coupling feed and coaxial feed to combine.
The invention is characterized in and contain: the 1st dielectric substrate, the 2nd dielectric substrate and loading monopole antenna, wherein: the 1st dielectric substrate is foursquare, and W=L, W are wide, and L is long, high h
1, there is a circular patch to be attached on said the 1st dielectric substrate upper surface, the center of the center of circle of this circular patch and the 1st dielectric substrate overlaps, and the diameter of said circular patch is R;
The 2nd dielectric substrate is long to be L, and wide is W, W=L, high h
2The upper surface of the 2nd dielectric substrate overlaps with the lower surface of said the 1st dielectric substrate, and this coincidence face is a ground plane, and two H shape seams are arranged on said coincidence face; Wherein, First H shape seam is along the Y direction arranged perpendicular, and the Y shaft position in the circular patch center of circle on center, slit and the 1st dielectric substrate upper surface is consistent, and the middle transverse arm that this first H shape is stitched is La at the height of vertical direction
1, the middle transverse arm width of this first H shape seam is wa
1, the width of two arms in this first H shape seam respectively is wa
2, the height of two arms respectively is La
2, second H shape seam is along negative X axis direction horizontal arrangement, and the middle transverse arm length in the horizontal direction of this second H shape seam is La
1, the middle transverse arm width of this second H shape seam is wa
1, the height of two arms in this second H shape seam respectively is La
2, width respectively is wa
2, the center of this seam is consistent with the circular patch center Y shaft position on the 1st dielectric substrate upper surface, in X axis positive direction one side; Begin from said the 2nd dielectric substrate edge,, paste one article of the 1st microstrip feed line along X axis direction; This feeder line port is P1, the 1st microstrip feed line length P1
L=ds
1+ ls
1The center of the 1st microstrip feed line is perpendicular corresponding with the center of said first H shape seam, in this circular patch Y axis positive direction one side, from beginning along the following edge of said the 1st dielectric substrate; Being parallel to said Y direction, is D in the center of circle horizontal direction distance apart from this circular patch
2One article of the 2nd microstrip feed line pasted at the place, and the 2nd microstrip feed line port is P2, the 2nd microstrip feed line length P2
L=ds
2+ ls
2, the center of the 2nd microstrip feed line is perpendicular corresponding with the center at said second H shape seam center, and said microstrip feed line stitches the said circular patch feed that is coupled through said first H shape seam and second H shape;
Load monopole antenna and be with the loading disk loading of a diameter r, the length of this loading monopole antenna is h
0, this loading monopole antenna lower end links to each other with the inner wire of a coaxial line that passes from the central point of said equitant the 1st dielectric substrate and the 2nd dielectric substrate, and the outer conductor of this coaxial line is simultaneously and link to each other with the circular patch introducing of content of said ground plane.
Fig. 2 has provided the reflection coefficient of antenna actual measurement, can see that each port reflection coefficient less than the bandwidth range measurement result of-10dB respectively as follows: S
11(monopole port M1) bandwidth 2.38-2.59GHz, S
22(port P1) bandwidth 2.38-2.62GHz, S
33(port P2) bandwidth 2.40-2.61GHz.
Fig. 3 has provided the isolation of surveying between antenna three ports.Can find out, the isolation of port P1 and port M1 in bandwidth range less than-16dB, the isolation of port P1 and port P2 in bandwidth range less than-30dB, port P2 and port M1 in bandwidth range less than-40dB.Measurement result shows that the mutual isolation effect of three ports of groove coupling feed three poliarizing antennas is desirable, all can work alone.
Fig. 4 is each port actual measurement directional diagram.For the ease of the comparison of directional diagram, all directional diagrams have all carried out corresponding normalization.Figure (a) is XZ, the YZ face directional diagram of port P1 (b).From can knowing the figure as a result, E_theta is greater than E_phi in the XZ face, and in the YZ face, E_phi explains then that greater than Etheta the electric field of port P1 radiation is parallel to the X axle.The XZ of port P2, YZ face directional diagram can see also that for scheming (c) (d) electric field of outbound port P2 radiation is parallel with the Y axle.Figure (e) (f) is depicted as XZ, the YZ face directional diagram of port M1.No matter can find out from measured result, still be the YZ face at the XZ face, and the E_theta of port M1 is greater than E_phi, and the electric field that port M1 is described is for being parallel to Z-direction.It is thus clear that antenna has three orthogonal polarizations patterns.
Description of drawings
Fig. 1 three poliarizing antenna structure chart: a, vertical view, b, positive end view.1-circular patch wherein, 2-loads disk, the 3-dielectric substrate, 4-loads disk, 5-circular patch, the apertured ground plane of 6-, 7-inductance, 8-feeder line 1 and port P1,9-feeder line 2 and port P2,10-coaxial line and port M1.
Fig. 2 three port reflection coefficient measured curves.
The change curve of any two ports of Fig. 3 in frequency band range.
Fig. 4 three ports actual measurement antenna pattern:
(a) XZ plane, port P1 feed
(b) YZ plane, port P1 feed
(c) XZ plane, port P2 feed
(d) YZ plane, port P2 feed
(e) XZ plane, coaxial line port M1 feed
(f) YZ plane, coaxial line port M1 feed
Embodiment
Adopting the double slit coupling is design dual polarized antenna method commonly used to the paster feed, and the slit coupling can improve the isolation between port effectively, and this method that the present invention adopts is just carried out feed to circular patch and formed dual polarization.Antenna structure is as shown in Figure 1.Antenna is made up of two layer medium layer substrate, is respectively dielectric substrate 1 and dielectric substrate 2.The dual polarization circular patch is attached to substrate 1 upper surface.The ground plane of two " H " groove parts between dielectric substrate 1 and substrate 2, feed is coupled between dual polarization circular patch and feeder line.Article two, microstrip feed line is positioned at the lower surface of dielectric substrate 2, and lays respectively at the below in corresponding slit, and feed forms and the X axle, the orthogonal polarization of the both direction that the Y axle is parallel.Two " H " shape slits are " T " shape places, and is used to improve the isolation in two slits.
Because the electric field of two orthogonal modess in the paster center that has encouraged on the circular patch is all zero, two orthogonal modes are not exerted an influence so can add shorting pin or other short circuit condition in dual polarization circular patch center.The design that we propose has been utilized this short circuit boundary condition just, and a coaxial line is passed from the paster central point.The outer conductor of coaxial line links to each other with dual polarization circular patch unit with ground plane simultaneously.The inner wire of coaxial line links to each other with the monopole antenna that a disk loads.The electric field that this monopole antenna has encouraged is parallel with the Z axle.In the mode of operation of monopole antenna, the dual polarization circular patch is used as the earth.
The present invention has adopted loading monopole antenna rather than quarter-wave monopole antenna as radiating element, thereby has reduced the height of monopole effectively.In the operating frequency of 2.6GHz, the quarter-wave monopole antenna needs the height of 29mm, and traditional loading monopole antenna also has the height of 15mm usually.In order to guarantee conformal requirement, the height of the loading monopole antenna that the present invention adopts is 5mm.Along with the reduction that loads the monopole antenna height, the equivalent parallel capacitance that loads between disk and the earth begins to increase, thereby the port match that causes loading monopole antenna worsens.In order to offset the influence of equivalent parallel electric capacity; The present invention has introduced the shunt inductance of 1.5nH at antenna input; Resonant circuit that shunt inductance, electric capacity constitute is offseted at the working frequency range interior resonance of antenna, thereby realized the antenna feed impedance of pure resistance characteristic.
The concrete size of antenna is as shown in Figure 1, and Fig. 1 a and Fig. 1 b are respectively the vertical view and the end views of antenna.The entire antenna volume is 94mm*94mm*10.8mm.The dielectric constant of dielectric substrate 1 is 2.6, and the dielectric constant of dielectric substrate 2 is 4.5.Two dielectric layers are by W, L, R, h
1And h
2Definition, " H " groove part crack is by ds, ls, la
1, la
2, wa
1, wa
2, the D definition loads monopole antenna by h
0, the r definition.The design parameter of actual antennas is following: W=L=94mm, R=40mm, h
1=5mm, h
2=0.8mm, h
0=5mm, r=15.6mm.Port one: ds
1=32.5mm, ls
1=7mm, la
1=17mm, la
2=2mm, wa
1=1mm, wa
2=4mm, D
1=0mm.Port 2:ds
2=47mm, ls
2=8.8mm, la
1=11.4mm, la
2=2mm, wa
1=1mm, wa
2=4mm, D
2=12.3mm.
The dual polarization circular patch has encouraged and has been parallel to X, and the electric field of two orthogonal directions of Y axle loads the monopole excitation and worked the field that is parallel to Z-direction, so this antenna has formed the polarization of three directions.
Claims (3)
1. the conformal antenna of a polarization is characterized in that containing: the 1st dielectric substrate, the 2nd dielectric substrate with load monopole antenna, wherein:
The 1st dielectric substrate is foursquare, and W=L, W are wide, and L is long, high h
1, there is a circular patch to be attached on said the 1st dielectric substrate upper surface, the center of the center of circle of this circular patch and the 1st dielectric substrate overlaps, and the diameter of said circular patch is R;
The 2nd dielectric substrate is long to be L, and wide is W, W=L, high h
2The upper surface of the 2nd dielectric substrate overlaps with the lower surface of said the 1st dielectric substrate, and this coincidence face is a ground plane, and two H shape seams are arranged on said coincidence face; Wherein, First H shape seam is along the Y direction arranged perpendicular, and the Y shaft position in the circular patch center of circle on center, slit and the 1st dielectric substrate upper surface is consistent, and the middle transverse arm that this first H shape is stitched is La at the height of vertical direction
1, the middle transverse arm width of this first H shape seam is wa
1, the width of two arms in this first H shape seam respectively is wa
2, the height of two arms respectively is La
2, second H shape seam is along negative X axis direction horizontal arrangement, and the middle transverse arm length in the horizontal direction of this second H shape seam is La
1, the middle transverse arm width of this second H shape seam is wa
1, the height of two arms in this second H shape seam respectively is La
2, width respectively is wa
2, the center of this second H shape seam is consistent with the circular patch center Y shaft position on the 1st dielectric substrate upper surface, in X axis positive direction one side; Begin from said the 2nd dielectric substrate edge,, paste one article of the 1st microstrip feed line along X axis direction; This feeder line port is P1, the 1st microstrip feed line length P1
L=ds
1+ ls
1The center of the 1st microstrip feed line is perpendicular corresponding with the center of said first H shape seam, in this circular patch Y axis positive direction one side, from beginning along the following edge of said the 1st dielectric substrate; Being parallel to said Y direction, is D in the center of circle horizontal direction distance apart from this circular patch
2One article of the 2nd microstrip feed line pasted at the place, and the 2nd microstrip feed line port is P2, the 2nd microstrip feed line length P2
L=ds
2+ ls
2, the center of the 2nd microstrip feed line is perpendicular corresponding with the center of said second H shape seam, and said microstrip feed line stitches the said circular patch feed that is coupled through said first H shape seam and second H shape;
Load monopole antenna and be with the loading disk loading of a diameter r, the length of this loading monopole antenna is h
0, this loading monopole antenna lower end links to each other with the inner wire of a coaxial line that passes from the central point of equitant said the 1st dielectric substrate and the 2nd dielectric substrate, and the outer conductor of this coaxial line links to each other with circular patch with said ground plane simultaneously.
2. the conformal antenna of a kind of three polarization according to claim 1 is characterized in that: the wide W=94mm of said the 1st dielectric substrate, high h
1=5mm, the diameter R=40mm of said circular patch, the long L=94mm of said the 2nd dielectric substrate, wide W=94mm, high h
2=0.8mm, the middle transverse arm of said first H shape seam is at the height La of vertical direction
1=17mm, middle transverse arm width wa
1=1mm, the width of two arms respectively are wa
2=4mm, the height of two arms respectively are La
2=2mm, the height La of two arms in said second H shape seam
2=2mm highly respectively is wa
2=4mm, said the 1st microstrip feed line length P1
L=ds
1+ ls
1, ds
1=32.5mm, ls
1=7mm, said the 2nd microstrip feed line and circular patch center of circle horizontal direction distance B
2=12.3mm, the 2nd microstrip feed line length P2
L=ds
2+ ls
2, ds
2=47mm, ls
2=8.8mm, the diameter r=15.6mm of said loading disk.
3. the conformal antenna of a kind of three polarization according to claim 1 is characterized in that: the center at said circular patch adds a shunt inductance; Use said shunt inductance; The resonant circuit that loads the equivalent parallel electric capacity formation between disk and the ground plane produces resonance and makes electric capacity and inductance cancel out each other in the working frequency range of this loading monopole antenna, realize the antenna feed impedance of pure resistance characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102475550A CN101483277B (en) | 2008-12-30 | 2008-12-30 | Triple polarized conformal antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102475550A CN101483277B (en) | 2008-12-30 | 2008-12-30 | Triple polarized conformal antenna |
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| Publication Number | Publication Date |
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| CN101483277A CN101483277A (en) | 2009-07-15 |
| CN101483277B true CN101483277B (en) | 2012-07-25 |
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| CN101615724B (en) * | 2009-07-21 | 2013-05-22 | 清华大学 | Conformal tri-polarization antenna |
| JP5048092B2 (en) * | 2010-02-16 | 2012-10-17 | 東芝テック株式会社 | Antenna and portable device |
| JP2011171839A (en) * | 2010-02-16 | 2011-09-01 | Toshiba Tec Corp | Antenna and portable apparatus |
| US8786509B2 (en) | 2010-03-16 | 2014-07-22 | Raytheon Company | Multi polarization conformal channel monopole antenna |
| CN102354809B (en) * | 2011-08-09 | 2014-04-02 | 华南理工大学 | Double-frequency and double-polarization antenna capable of operating in compass satellite navigation system and mobile third-generation (3G) network |
| CN102891360A (en) * | 2012-09-29 | 2013-01-23 | 航天恒星科技有限公司 | Broadband miniaturization double-rotating circularly polarized antenna |
| FR3007215B1 (en) * | 2013-06-17 | 2015-06-05 | Zodiac Data Systems | SOURCE FOR PARABOLIC ANTENNA |
| CN103858277B (en) * | 2013-12-20 | 2015-12-30 | 华为技术有限公司 | A kind of three poliarizing antennas |
| CN104103906A (en) * | 2014-08-01 | 2014-10-15 | 东南大学 | Low-cost microwave- and millimeter-wave polarized antenna of multi-layer PCB (Printed circuit board) process |
| CN104241824B (en) * | 2014-09-12 | 2017-04-05 | 华南理工大学 | A kind of universal combined reader antenna |
| CN104485522B (en) * | 2014-12-15 | 2018-01-05 | 宁波安陆通信科技有限公司 | A kind of dual polarization slot-coupled antenna |
| CN104934712A (en) * | 2015-07-01 | 2015-09-23 | 成都众易通科技有限公司 | Vehicle-mounted radio frequency signal transceiving device |
| CN104993236A (en) * | 2015-07-01 | 2015-10-21 | 成都众易通科技有限公司 | Floor device applied to vehicle radio frequency signal transmit-receive apparatus |
| CN105071044B (en) * | 2015-08-12 | 2018-08-14 | 四川省韬光通信有限公司 | A kind of small high isolation degree dual polarization medium resonator antenna |
| CN105762482B (en) * | 2016-03-07 | 2019-02-05 | 联想(北京)有限公司 | A kind of dual polarized antenna and electronic equipment |
| CN107785649A (en) * | 2016-08-26 | 2018-03-09 | 中国移动通信集团河北有限公司 | A kind of three poliarizing antennas |
| CN107342458B (en) * | 2017-07-02 | 2020-04-28 | 中国航空工业集团公司雷华电子技术研究所 | Angle-feed broadband high-isolation dual-polarized antenna |
| CN111585031A (en) * | 2020-06-22 | 2020-08-25 | 南京信息工程大学 | Multi-polarization microstrip antenna based on double-slit coupling structure |
| CN115101930B (en) * | 2022-07-15 | 2022-11-15 | 广东工业大学 | Dual-frequency satellite navigation antenna with edge-loaded resonant branches |
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| CN101483277A (en) | 2009-07-15 |
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