CN206225537U - A kind of broadband polarization restructural antenna for base station - Google Patents
A kind of broadband polarization restructural antenna for base station Download PDFInfo
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- CN206225537U CN206225537U CN201621086049.4U CN201621086049U CN206225537U CN 206225537 U CN206225537 U CN 206225537U CN 201621086049 U CN201621086049 U CN 201621086049U CN 206225537 U CN206225537 U CN 206225537U
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- oscillator unit
- branch
- medium substrate
- base station
- oscillator
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Abstract
The utility model discloses a kind of broadband polarization restructural antenna for base station, including the first oscillator unit, second oscillator unit, feeding network and medium substrate, first oscillator unit and the mutually orthogonal nesting of the second oscillator unit are fixed on the upper surface of medium substrate, the feeding network is printed on the lower surface of medium substrate, described first and second oscillator unit includes printing vibrator, parasitic element, feeding microstrip line and oscillator unit medium substrate, the printing vibrator and parasitic element are printed on the upper surface of oscillator unit medium substrate, the parasitic element is located at the top of printing vibrator, the feeding microstrip line is located at the lower surface of oscillator unit medium substrate, feeding microstrip line is connected with feeding network.This beamwidth of antenna can substantially cover 698 960MHz, can substantially cover GSM900 and LTE700 frequency ranges.
Description
Technical field
The utility model is related to antenna of mobile communication base station field, more particularly to a kind of broadband polarization restructural base station day
Line.
Background technology
Antenna for base station as GSM important component, its performance has decisive work to GSM
With.Compared to ordinary antennas, polarization reconfigurable antenna can improve spatial degrees of freedom in order to improve wireless communication system and be
System capacity, improves the availability of frequency spectrum, improves the transmission rate of communication system.In addition, polarization reconfigurable antenna is for multipath effect
The signal fadeout for causing also has certain inhibitory action, improves immunocompetence of the system to interference signal.
The polarization restructural of antenna is presently mainly realized by controllable feed system and controllable gap.The former is to feed
System loads variable reactance or switched feed position, produce the phase difference of different working modes to realize the restructural of polarization.
The latter is then, in the suitable position etching gap of antenna, the flow path of antenna current to be changed using RF switch, realizes antenna
Polarization restructural.
Utility model content
For the shortcoming for overcoming prior art to exist and a kind of not enough, broadband polarization restructural base station of the utility model offer
Antenna.
The utility model is adopted the following technical scheme that：
A kind of broadband polarization restructural antenna for base station, including the first oscillator unit, the second oscillator unit, feeding network and Jie
Matter substrate, first oscillator unit and the mutually orthogonal nesting of the second oscillator unit are fixed on the upper surface of medium substrate, described
Feeding network is printed on the lower surface of medium substrate, described first and second oscillator unit include printing vibrator, parasitic element,
Feeding microstrip line and oscillator unit medium substrate, the printing vibrator and parasitic element are printed on the upper of oscillator unit medium substrate
Surface, the parasitic element is located at the top of printing vibrator, and the feeding microstrip line is located at the following table of oscillator unit medium substrate
Face, feeding microstrip line is connected with feeding network.
The printing vibrator of first and second oscillator unit includes oscillator unit left arm, oscillator unit right arm and the line of rabbet joint, described
, on oscillator unit medium substrate longitudinal midline specular, the line of rabbet joint is located at and shakes for oscillator unit left arm and oscillator unit right arm
The longitudinal midline of subelement medium substrate.
First and second oscillator unit also includes fluting, longitudinal midline of the fluting positioned at oscillator unit medium substrate
On, the line of rabbet joint of the first oscillator unit is located at the top of the first oscillator unit medium substrate longitudinal midline, the groove of the second oscillator unit
Line is located at the bottom of the first oscillator unit medium substrate longitudinal midline；
The fluting of the first oscillator unit is positioned at the bottom of the first oscillator unit medium substrate longitudinal midline, the second oscillator unit
Fluting positioned at the second oscillator unit medium substrate longitudinal midline top.
The feeding microstrip line includes the first matching section, the second coupled section and the 3rd matching section, second coupled section point
Not perpendicular to first and the 3rd matching section, second coupled section is perpendicular to oscillator unit medium substrate longitudinal midline.
Second coupled section of the first oscillator unit raises up at Coupling point, and the second coupled section of the second oscillator unit exists
It is downwardly convex at Coupling point.
The feeding network is specially Wilkinson power divider, including feed port, output branch road, quarter-wave long pass
Defeated line, branch road, the first branch, the second branch, the 3rd branch and the 4th branch, first branch and branch road respectively with four/
One wavelength transmission line is connected, and the first output branch road and the second output branch road that the output branch route is parallel to each other are constituted, described
Second branch, the 3rd branch are separated by branch road, and the feed port is located at the center of medium substrate, the left and right of the feed port
Both sides are provided for carrying out first and second switch of linear polarization and circular polarisation switching, and it is left that the first switch is located at feed port
Between side and the 4th branch, the second switch is located between feed port right side and quarter-wave transmission line, the 4th point
Be respectively provided with the 3rd and the 4th switch between branch and first and second output branch road, first branch and the second output branch road it
Between set the 5th switch, second branch, the 3rd branch and first output branch road between be respectively provided with the 6th and the 7th switch,
The the 8th and the 9th switch is respectively provided between the branch road and the second branch, the 3rd branch.
First branch and the second branch length difference a quarter λg, first branch and the 3rd branch length
Difference a quarter λg, λgRespective antenna centre frequency 820MHz wavelength in media as well, the quarter-wave transmission line
The Ω of characteristic impedance 70.7, its characteristic impedance of each branch is 50 Ω.
When second switch, the 5th switch, the 7th switch and the 9th switch are opened simultaneously, left-hand circular polarization is realized；When second
Switch, the 5th switch, the 6th switch and the 8th are closed triumphant while opening, and realize right-handed circular polarization；
When first switch and the 3rd switch are opened simultaneously, electric current realizes+45 ° of line poles by the first output branch road, antenna
Change；When first switch and the 4th switch are opened simultaneously, electric current realizes -45 ° of linear polarizations by the second output branch road, antenna.
The fluting is identical with the thickness of oscillator unit medium substrate.
The height of first and second oscillator unit is 0.3 λ0~0.5 λ0, λ0It is 365.9mm, the parasitic element
Longitudinal midline on oscillator unit medium substrate is symmetrical.
The beneficial effects of the utility model：
(1) the utility model uses the mutually orthogonal nesting of oscillator unit of two planar structures, simple structure, two oscillators
Only need to intert between unit and nest together, be fixed on dielectric-slab.
(2) impedance bandwidth is further widened using parasitic element；
(3) feed structure is the combination of a printing wideband balun and modified Wilkinson power divider, realize left-right rotary and
Native 45 ° of broadband polarization reconfigurable antennas of four kinds of polarization modes.The beamwidth of antenna can substantially cover 698-960MHz, can cover substantially
GSM900 and LTE700 frequency ranges.
Brief description of the drawings
Fig. 1 is a kind of structural representation of broadband polarization restructural antenna for base station of the utility model；
Fig. 2 is the structural representation of the first oscillator unit in the utility model Fig. 1；
Fig. 3 is the structural representation of the second oscillator unit in the utility model Fig. 1；
Fig. 4 is the structural representation of feeding network in the utility model Fig. 1；
Fig. 5 is circular polarisation broadband of the present utility model figure；
Fig. 6 is Circular polarization ratio bandwidth figure of the present utility model；
Fig. 7 is native 45 ° of polarization bandwidth figure of the present utility model；
Fig. 8 is in 820MHz radiation when a kind of broadband polarization restructural antenna for base station of the present utility model is in left-hand circular polarization
Directional diagram；
Fig. 9 is in 820MHz antenna patterns when a kind of broadband polarization restructural antenna for base station is in right-handed circular polarization；
Figure 10 is in 820MHz antenna patterns when a kind of broadband polarization restructural antenna for base station polarizes in+45 °；
Figure 11 is in 820MHz antenna patterns when a kind of broadband polarization restructural antenna for base station polarizes in -45 °.
Specific embodiment
With reference to embodiment and accompanying drawing, the utility model is described in further detail, but reality of the present utility model
Apply mode not limited to this.
Embodiment
As shown in figure 1, a kind of broadband polarization restructural antenna for base station, including the first oscillator unit 1, the second oscillator unit 2,
Feeding network and medium substrate 3, the mutually orthogonal nesting of first oscillator unit, 1 and second oscillator unit 2 are fixed on medium base
The upper surface of plate 3, the feeding network is printed on the lower surface of medium substrate 3, and described first and second oscillator unit includes
Printing vibrator, parasitic element, feeding microstrip line and oscillator unit medium substrate, the printing vibrator and parasitic element are printed on and shake
The upper surface of subelement medium substrate, the parasitic element is located at the top of printing vibrator, and the feeding microstrip line is located at oscillator
Copper is covered in the lower surface of unit medium substrate, medium substrate front, and feeding microstrip line is connected by the via that metallizes with feeding network.
The height of first, second oscillator unit is 0.3 λ0~0.5 λ0, λ0It is 365.9mm.
It is as shown in Figure 2 the structure of the first oscillator unit, such as Fig. 3 is the structure of the second oscillator unit, the first oscillator unit
Structure with the second oscillator unit is essentially identical, and the printing vibrator of first and second oscillator unit includes oscillator unit left arm, shakes
Subelement right arm and the line of rabbet joint, the oscillator unit left arm and oscillator unit right arm are on oscillator unit medium substrate longitudinal midline mirror
As symmetrical, longitudinal midline of the line of rabbet joint positioned at oscillator unit medium substrate.
As shown in Fig. 2 printing vibrator of the structure of the first oscillator unit including the first oscillator unit, the first oscillator unit
The oscillator unit medium substrate 7 of parasitic element 4C, the feeding microstrip line of the first oscillator unit and the first oscillator unit, described first
The printing vibrator of oscillator unit includes the groove of the first oscillator unit left arm 4A, the first oscillator unit right arm 4B and the first oscillator unit
Line 5, the parasitic element of first oscillator unit is located at the top of the printing vibrator of the first oscillator unit, the first oscillator unit
The longitudinal midline of oscillator unit medium substrate of the printing vibrator on the first oscillator unit is symmetrical.
As shown in figure 3, printing vibrator of the structure of the second oscillator unit including the second oscillator unit, the second oscillator unit
The medium substrate 12 of parasitic element 9C, the feeding microstrip line of the second oscillator unit and the second oscillator unit, the second oscillator list
The printing vibrator of unit includes the line of rabbet joint 10 of the second oscillator unit left arm 9A, the second oscillator unit right arm 9B and the first oscillator unit.
As shown in Fig. 2 the feeding microstrip line of the first oscillator unit includes the first matching section 8A, first of the first oscillator unit
Second coupled section 8B of oscillator unit and the 3rd matching section 8C of the first oscillator unit are constituted.First oscillator unit first
First the second coupled section of oscillator unit, the first matching section 8A are respectively perpendicular to section and the matching section of the first oscillator unit the 3rd
A length of 0.1~0.3 λ0, its characteristic impedance is 50 Ω, a length of 0.05~0.15 λ of the 3rd matching section 8C0, its characteristic impedance is 50 Ω,
Second coupled section of first oscillator unit raises up at Coupling point.
As shown in figure 3, the first matching section 13A of the feeding microstrip line of the second oscillator unit including the second oscillator unit, the
The second coupled section 13B and the 3rd matching section 13C of the second oscillator unit of two oscillator units.The first of second oscillator unit
3rd matching section of matching section and the second oscillator unit is respectively perpendicular to the second coupled section of the second oscillator unit, and described second shakes
Second coupled section of subelement is downwardly convex at Coupling point.
In order to slot milling realizes the mutually nested of two oscillator units, respectively in the first oscillator unit medium substrate
The fluting 6 of the first oscillator unit equal to medium plate thickness is provided with the middle of 7 downwards.As shown in figure 3, second oscillator unit is situated between
The fluting 11 of the second oscillator unit equal to medium plate thickness, the fluting of the first oscillator unit and the second oscillator list are provided with scutum
The fluting of unit is respectively positioned on the midline of place medium substrate, and the second coupled section 8B of corresponding the first oscillator unit is in Coupling point
Place is to recessed, and the second coupled section 13B of the second oscillator unit is concave up at Coupling point.
The line of rabbet joint of the first oscillator unit is located at the top of the first oscillator unit medium substrate longitudinal midline, the second oscillator unit
The line of rabbet joint be located at the first oscillator unit medium substrate longitudinal midline bottom；
The fluting of the first oscillator unit is positioned at the bottom of the second oscillator unit medium substrate longitudinal midline, the second oscillator unit
Fluting positioned at the second oscillator unit medium substrate longitudinal midline top.
As shown in figure 4, the lower surface of medium substrate 3 sets feeding network, specially one improved Wilkinson work(point
Device, including feed port, output branch road, quarter-wave transmission line, the first branch 14A, the second branch 14B1, the 3rd branch
14B2 and the 4th branch 14C, the first output branch road 14D and the second output branch road 14E structures that the output branch route is parallel to each other
Into the second branch 14B1, the 3rd branch 14B2 are separated by branch road 14B, and the feed port 15 is located in medium substrate
Centre, the left and right sides of the feed port is provided for carrying out first and second switch of linear polarization and circular polarisation switching, described
First switch S1 be located at feed port left side and the 4th branch 14C between, the second switch S2 be located at feed port right side with
Between quarter-wave transmission line, the 3rd is respectively provided between the 4th branch 14C and first and second output branch road 14D, 14E
And the 4th switch, set the 5th between the outputs of the first branch 14A and second branch road 14E and switch S5, second branch
It is respectively provided with the 6th and the 7th switch between 14B1, the 3rd branch 14B2 and the first output branch road 14D, the branch road 14B and the
The the 8th and the 9th switch is respectively provided between two branch 14B1, the 3rd branch 14B2.
First branch and the second branch length difference a quarter λg, first branch and the 3rd branch length
Difference a quarter λg, λgRespective antenna centre frequency 820MHz wavelength in media as well, the quarter-wave transmission line
The Ω of characteristic impedance 70.7, its characteristic impedance of each branch is 50 Ω, first branch and branch road respectively with quarter-wave
Transmission line connection long, the quarter-wave transmission line is rectangle.
First branch 14A sections and the 3rd branch 14B2 sections of difference a quarter λ of power splittergLength difference, so as to produce 90 °
Phase difference, when second switch, the 5th switch, the 7th switch and the 9th switch are opened simultaneously, realizes left-hand circular polarization；
First branch 14A sections and second branch 14B1 sections difference a quarter λ of power splittergLength difference, it is same to produce 90 °
Phase difference, when second switch, the 5th switch, the 6th switch and the 8th switch are opened simultaneously, realizes right-handed circular polarization；
When first switch and the 3rd switch are opened simultaneously, electric current realizes+45 ° of lines by the first output branch road 14D, antenna
Polarization；When first switch and the 4th switch are opened simultaneously, electric current realizes -45 ° of line poles by the second output branch road 14E, antenna
Change.
First oscillator unit dielectric-slab 7 and the second oscillator unit dielectric-slab 12 and horizontal plane dielectric-slab 3 in the present embodiment
Use high frequency sheet material RO4350B, thickness 1.52mm, relative dielectric constant 3.48.
First oscillator unit 1 of the present embodiment and the height of the second oscillator unit 2 are about 0.2~0.4 λ0, long by about 0.4~
0.5λ0。
The length of the first matching section of first, second oscillator unit is 0.1~0.3 λ in the present embodiment0, width is
3.5mm, the second coupling segment length is 27mm, and width is 2.5mm, and the 3rd matching segment length is 0.05~0.15 λ0, width is
2.5mm。
The length of dielectric-slab 3 is 350mm in the present embodiment, and width is 250mm.The quarter-wave transmission line of power splitter
Width is 2.5mm, and the width of remainder is 3.5mm.
Its characteristic impedance of the branch of power splitter both sides is 50 Ω, and there is a quarter λgLength difference, so as to produce 90 °
Phase difference.Branch 14A a quarter λs more long than branch 14B2g, branch 14B a quarter λs more long than branch 14Ag, in order to save sky
Between, microstrip line is bent.Branch 14D and branch 14E have been drawn in feed port upper end, two kinds of linear polarizations have been realized.In feedback
The appropriate position of electric network is provided with nine switches altogether, realizes four kinds of restructurals of polarization mode.
As shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, the utility model realizes four kinds using nine switches
The restructural of polarization mode, feed structure is the combination of a printing wideband balun and modified power splitter, and the beamwidth of antenna can be covered
698-960MHz, with roomy, antenna pattern stabilization, high gain, truly realizes broadband polarization restructural.
Above-described embodiment is the utility model preferably implementation method, but implementation method of the present utility model is not by described
The limitation of embodiment, it is other it is any without departing from the change made under Spirit Essence of the present utility model and principle, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, be included within protection domain of the present utility model.
Claims (9)
1. a kind of broadband polarization restructural antenna for base station, it is characterised in that including the first oscillator unit, the second oscillator unit, feedback
Electric network and medium substrate, first oscillator unit and the mutually orthogonal nesting of the second oscillator unit are fixed on the upper of medium substrate
Surface, the feeding network is printed on the lower surface of medium substrate, described first and second oscillator unit include printing vibrator,
Parasitic element, feeding microstrip line and oscillator unit medium substrate, the printing vibrator and parasitic element are printed on oscillator unit Jie
The upper surface of matter substrate, the parasitic element is located at the top of printing vibrator, and the feeding microstrip line is located at oscillator unit medium
The lower surface of substrate, feeding microstrip line is connected with feeding network.
2. a kind of broadband polarization restructural antenna for base station according to claim 1, it is characterised in that first and second oscillator
The printing vibrator of unit includes oscillator unit left arm, oscillator unit right arm and the line of rabbet joint, the oscillator unit left arm and oscillator unit
Right arm is located in the longitudinal direction of oscillator unit medium substrate on oscillator unit medium substrate longitudinal midline specular, the line of rabbet joint
Line.
3. a kind of broadband polarization restructural antenna for base station according to claim 2, it is characterised in that first and second oscillator
Unit also includes fluting, and the fluting is located on the longitudinal midline of oscillator unit medium substrate, the line of rabbet joint position of the first oscillator unit
In the top of the first oscillator unit medium substrate longitudinal midline, the line of rabbet joint of the second oscillator unit is located at the first oscillator unit medium base
The bottom of plate longitudinal midline；
The fluting of the first oscillator unit positioned at the bottom of the first oscillator unit medium substrate longitudinal midline, open by the second oscillator unit
Groove is located at the top of the second oscillator unit medium substrate longitudinal midline.
4. a kind of broadband polarization restructural antenna for base station according to claim 1, it is characterised in that the feeding microstrip line
Including the first matching section, the second coupled section and the 3rd matching section, second coupled section is respectively perpendicular to first and the 3rd matching
Section, second coupled section is perpendicular to oscillator unit medium substrate longitudinal midline.
5. a kind of broadband polarization restructural antenna for base station according to claim 4, it is characterised in that the first oscillator unit
Second coupled section raises up at Coupling point, and the second coupled section of the second oscillator unit is downwardly convex at Coupling point.
6. a kind of broadband polarization restructural antenna for base station according to claim 1, it is characterised in that the feeding network tool
Body is Wilkinson power divider, including feed port, output branch road, quarter-wave transmission line, branch road, the first branch, the
Two branches, the 3rd branch and the 4th branch, first branch and branch road are connected with quarter-wave transmission line respectively, described
The the first output branch road and the second output branch road that output branch route is parallel to each other are constituted, and second branch, the 3rd branch are by propping up
Road separates, and the feed port is located at the center of medium substrate, and the left and right sides of the feed port is provided for into line pole
Change first and second switch with circular polarisation switching, the first switch is located between feed port left side and the 4th branch, institute
Second switch is stated between feed port right side and quarter-wave transmission line, the 4th branch exports branch with first and second
The the 3rd and the 4th switch is respectively provided between road, setting the 5th between first branch and the second output branch road switchs, described
The the 6th and the 7th switch is respectively provided between second branch, the 3rd branch and the first output branch road, the branch road and the second branch,
The the 8th and the 9th switch is respectively provided between 3rd branch.
7. a kind of broadband polarization restructural antenna for base station according to claim 6, it is characterised in that first branch and
Second branch length difference a quarter λg, first branch and the 3rd branch length differ a quarter λg, λgCorrespondence
Center of antenna frequency 820MHz wavelength in media as well, characteristic impedance 70.7 Ω of the quarter-wave transmission line, each point
Prop up its characteristic impedance and be 50 Ω.
8. a kind of broadband polarization restructural antenna for base station according to claim 3, it is characterised in that the fluting and oscillator
The thickness of unit medium substrate is identical.
9. a kind of broadband polarization restructural antenna for base station according to claim 1, it is characterised in that it is described first and second
The height of oscillator unit is 0.3 λ0~0.5 λ0, λ0It is 365.9mm, the parasitic element is on oscillator unit medium substrate
Longitudinal midline is symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621086049.4U CN206225537U (en) | 2016-09-27 | 2016-09-27 | A kind of broadband polarization restructural antenna for base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621086049.4U CN206225537U (en) | 2016-09-27 | 2016-09-27 | A kind of broadband polarization restructural antenna for base station |
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| Publication Number | Publication Date |
|---|---|
| CN206225537U true CN206225537U (en) | 2017-06-06 |
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ID=58782803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621086049.4U Expired - Fee Related CN206225537U (en) | 2016-09-27 | 2016-09-27 | A kind of broadband polarization restructural antenna for base station |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229668A (en) * | 2016-09-27 | 2016-12-14 | 华南理工大学 | A kind of broadband polarization restructural antenna for base station |
| CN109326894A (en) * | 2018-11-13 | 2019-02-12 | 上海海事大学 | A kind of crossed dipole plasma antenna |
| CN109546334A (en) * | 2018-10-31 | 2019-03-29 | 中天宽带技术有限公司 | A kind of low section cross oscillator for multifrequency antenna for base station |
-
2016
- 2016-09-27 CN CN201621086049.4U patent/CN206225537U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229668A (en) * | 2016-09-27 | 2016-12-14 | 华南理工大学 | A kind of broadband polarization restructural antenna for base station |
| CN106229668B (en) * | 2016-09-27 | 2023-08-18 | 华南理工大学 | Broadband polarization reconfigurable base station antenna |
| CN109546334A (en) * | 2018-10-31 | 2019-03-29 | 中天宽带技术有限公司 | A kind of low section cross oscillator for multifrequency antenna for base station |
| CN109546334B (en) * | 2018-10-31 | 2020-09-29 | 中天宽带技术有限公司 | Low-profile cross oscillator for multi-frequency base station antenna |
| CN109326894A (en) * | 2018-11-13 | 2019-02-12 | 上海海事大学 | A kind of crossed dipole plasma antenna |
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Granted publication date: 20170606 Termination date: 20190927 |