CN110474135A - Phase shifter package and antenna for base station - Google Patents
Phase shifter package and antenna for base station Download PDFInfo
- Publication number
- CN110474135A CN110474135A CN201910760341.1A CN201910760341A CN110474135A CN 110474135 A CN110474135 A CN 110474135A CN 201910760341 A CN201910760341 A CN 201910760341A CN 110474135 A CN110474135 A CN 110474135A
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- route
- phase shifter
- radiant output
- coupling
- phase
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- 230000008878 coupling Effects 0.000 claims abstract description 83
- 238000010168 coupling process Methods 0.000 claims abstract description 83
- 238000005859 coupling reaction Methods 0.000 claims abstract description 83
- 230000010363 phase shift Effects 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000010287 polarization Effects 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 239000012120 mounting media Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
This application involves a kind of phase shifter package and antenna for base station.Phase shifter package includes at least two coupling pieces.Each coupling piece includes coupling circuit.Feeding network includes at least two radiant output units being electrically connected to each other.Radiant output unit it is corresponding to coupling piece setting and quantity it is identical.Each radiant output unit includes phase shifter route, power divider route and radiant output end；The coupling circuit of phase shifter route and corresponding coupling piece is of coupled connections and can be with travel(l)ing phase；Power divider route is electrically connected phase shifter route and radiant output end；Radiant output end is for being electrically connected radiating element.Each radiating element of the application antenna for base station corresponding one can independently carry out the phase shift function unit of phase change, and then can independently carry out phase change to each radiating element, to improve antenna for base station phase shift flexibility.
Description
Technical field
This application involves antenna technical fields, more particularly to a kind of phase shifter package and antenna for base station.
Background technique
In mobile communications network covering, antenna for base station is one of key equipment of optimizing network coverage.Traditional base station
Antenna usually has multiple radiating elements.The phase shift process of each radiating element is concentrated and not flexible so that antenna be difficult into
Row Optimization Debugging.For example, needing to carry out phase shift, the mobile of phase can be to directional diagram in the application process of antenna for base station
It has an impact.And directional diagram influences the radiation coverage of antenna.It is ineffective due to traditional base station antenna phase shift process concentration
It is living, so that directional diagram is difficult to correct, to influence antenna coverage effect.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of shifting that can improve antenna for base station phase shift flexibility
Phase device assembly and antenna for base station.
A kind of phase shifter package, comprising:
At least two coupling pieces, each coupling piece includes coupling circuit；
Feeding network, including at least two radiant output units being electrically connected to each other, the radiant output unit with it is described
Coupling piece is accordingly arranged and quantity is identical, each radiant output unit include phase shifter route, power divider route with
And radiant output end, the coupling circuit of the phase shifter route and corresponding coupling piece be of coupled connections and can with travel(l)ing phase,
The power divider route is electrically connected the phase shifter route and the radiant output end, and the radiant output end is for electricity
Connect radiating element.
The length or shape of the coupling circuit on each coupling piece are different in one of the embodiments,.
The coupling circuit includes coupling part and interconnecting piece in one of the embodiments, and the coupling part is connected to institute
It states the two sides of interconnecting piece and can be of coupled connections with the phase shifter route, the length or shape phase of the interconnecting piece on each coupling piece
It is different.
The length or shape of the phase shifter route of each radiant output unit are different in one of the embodiments,.
The line width of the power divider route of each radiant output unit is different in one of the embodiments,.
In one of the embodiments,
The phase shifter package further includes pull rod and at least two rotating bars, and the rotating bar is corresponding to the coupling piece
Setting and quantity is identical, each rotating bar includes first end and second end,
The first end of each rotating bar is connected to the pull rod, the second end of each rotating bar with corresponding institute
It is coaxially connected to state coupling piece,
The pull rod is mobile to drive the rotating bar rotation, and the rotating bar rotation drives the coupling piece and the rotation
Bar rotates coaxially.
The radiant output end includes the first output end and second output terminal in one of the embodiments,.
In one of the embodiments,
The phase shifter route includes the first phase shift route and the second phase shift route, and the power divider route includes
First distributed lines and the second distributed lines；
First distributed lines are electrically connected the first phase shift route and first output end, second distribution
Route is electrically connected the second phase shift route and the second output terminal.
The feeding network further includes the second power divider route, second power in one of the embodiments,
Commutator circuit is electrically connected the phase shifter route of the radiant output unit described in one of them, is used for transmission aerial signal.
A kind of antenna for base station, including at least two radiating elements and phase shifter package described in any of the above embodiments, it is described
Radiating element setting corresponding to the radiant output unit and quantity is identical, the radiant output end of each radiant output unit electricity
It is connected to corresponding radiating element.
The coupling circuit of above-mentioned phase shifter package, the phase shifter route and corresponding coupling piece is of coupled connections and can be with
Travel(l)ing phase.So the coupling line of the phase shifter route of each radiant output unit and its corresponding coupling piece
Road forms a phase shift function unit.Also, each radiant output unit includes the radiation for being electrically connected radiating element
Output end.Therefore, using the antenna for base station of the application phase shifter package, each radiating element corresponding one can independently carry out phase
The phase shift function unit that position changes, and then phase change can independently be carried out to each radiating element, to improve base station day
Line phase shift flexibility.
Detailed description of the invention
Fig. 1 is the phase shifter package schematic diagram in one embodiment；
Fig. 2 is the coupling piece schematic diagram in one embodiment；
Fig. 3 is the feeding network schematic diagram in one embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
Phase shifter package and antenna for base station provided by the present application can be applied in mobile communications network covering.
In one embodiment, a kind of antenna for base station, including phase shifter package and at least two radiating elements are provided
(not shown).
With reference to Fig. 1, phase shifter package includes feeding network 100 and at least two coupling pieces 200.It is each to couple with reference to Fig. 2
Piece 200 includes coupling circuit 210.Coupling piece 200 can be the medium for foring conductive transmission line (i.e. coupling circuit 210)
Plate, such as can be the dielectric-slab for covering copper.
High-frequency dielectric printed circuit board (PCB) can be used in feeding network 100.PCB is upper can be using modes shapes such as printings
At microstripline, to form feeding network.For example, two sides, which can be used, in feeding network 100 covers copper high-frequency dielectric printed circuit
Plate (PCB).
Meanwhile with reference to Fig. 3, the present embodiment setting feeding network 100 includes at least two radiant outputs being electrically connected to each other
Unit 110.With reference to Fig. 1 and Fig. 3, radiant output unit 110 it is corresponding to coupling piece 200 setting and quantity it is identical.That is a spoke
Penetrate the corresponding coupling piece 200 of output unit 110.Coupling piece 200 can be fixed on feeding network by mounting medium plate 300
On 100.
Each radiant output unit 110 includes phase shifter route 111, power divider route 112 and radiant output
End 113.Wherein, the phase shifter route 111 of each radiant output unit 110 with 210 coupling of coupling circuit of corresponding coupling piece 200
Conjunction connects and can be with travel(l)ing phase.That is, the phase shifter route 111 of each radiant output unit 110 and its corresponding coupling piece
200 coupling circuit 210 forms a phase shift function unit.210 surface of coupling circuit of coupling piece 200 can cover a kind of spy
Different material comes so that coupling circuit 210 and phase shifter route 111 are realized and are electrically connected by coupling.
Specifically, for a phase shift function unit, with reference to Fig. 3, phase shifter route 111 can have two and mutually break
The phase shift sub-line road 111a opened.Phase shift sub-line road 111a can be set to arc or other shapes.Meanwhile with reference to Fig. 2, the shifting
The coupling circuit 210 of phase functional unit has two parts opposite with two phase shift sub-line road 111a, and then can be simultaneously with two
A phase shift sub-line road 111a coupling.Aerial signal on same phase shift function unit is by phase shift in phase shifter route 111
Route 111a is transferred on coupling circuit 210, then is transferred to another phase shift sub-line road 111a by coupling circuit 210.It can manage
Solution, " aerial signal " of the application meaning refer to electric signal.
With reference to Fig. 2 and Fig. 3, the phase shifter route 111 and coupling circuit 210 of the same phase shift function unit are opposite to be moved
It is dynamic so that the face position of the two changes so that aerial signal transmission range (in coupling circuit 210 not with shifting
The length of the opposite part of phase device route 111) it changes, and then change phase.
The power divider route 112 of same radiant output unit 110 is electrically connected phase shifter route 111 and radiant output
End 113.Radiating element it is corresponding to radiant output unit 110 setting and quantity it is identical.The radiant output of each radiant output unit 110
End 113 is electrically connected to corresponding radiating element.Therefore, each radiating element corresponds to the shifting that can independently carry out phase change
Phase functional unit.
With reference to Fig. 3, after the aerial signal of antenna for base station is transferred to a radiant output unit 110, by phase shifter route
111 with the cooperation of coupling circuit 210 and carry out phase shift.Then, by the power divider route of the radiant output unit 110
112 distribute a part of aerial signal of phase shift to predetermined power amount to radiant output end 113 by a certain percentage, and via connection
Radiant output end 113 and radiating element will be transferred to the aerial signal of predetermined power amount after distribution, and then be radiated from
Electromagnetic wave is formed by space.Here predetermined power amount can be configured according to actual needs.
Each radiant output unit 110 on feeding network 100 is electrically connected to each other, the phase shift of above-mentioned radiant output unit 110
Another part aerial signal crossed will continue to by the line transmission on feeding network 100 to next radiant output unit 110
Phase shifter route 111 on.Then, by 111 phase shift of phase shifter route on next radiant output unit 110, and under
Power divider route 112 on one radiant output unit 110 distributes a part of aerial signal to next radiant output list
The radiant output end 113 of member 110, and it is transferred to another radiating element, and then be radiated free space and form electromagnetic wave.Successively
Circulation, until the last one radiant output unit 110 and radiating element.
Certainly, radiating element also can receive in addition to radiating outwardly other than electromagnetic signals to free space
The electromagnetic wave signal of external world's transmitting, and electric signal transmission is converted to radiant output end 113 by electromagnetic wave signal, then, pass through
It crosses and is transmitted using power divider route 112.The specific receive process of the electromagnetic wave signal of antenna for base station be and above-mentioned electromagnetism
An opposite process of the specific emission process of wave signal.
Therefore, the present embodiment antenna for base station can independently carry out phase change to each radiating element, to improve base
Station antenna phase shift flexibility.
In one embodiment, the length or shape of the coupling circuit 210 on each coupling piece 200 are different.At this point, each phase shift
When the phase shifter route 111 and coupling circuit 210 of functional unit relatively move, the transmission range of aerial signal changes different.Cause
This, each phase shift function unit can provide different phase changes for each radiating element, and then can be adjusted by phase change
Antenna performance.
For example, an antenna for base station can first be designed, so that the respective tool of the coupling circuit 210 on its each coupling piece 200
There is different length (or shape).Then directional diagram is characterized, and according to directional diagram characterization result, directional diagram is repaired
It is multiple.The length (or shape) of the coupling circuit 210 on each coupling piece 200 is adjusted, until making the phase change of each radiating element
Caused directional diagram variation can mutually compensate, so that directional diagram is repaired, so that the directional diagram of antenna for base station is finally indeformable.Cause
This, the antenna for base station after final adjustment can be radiated in the preferred range, and guarantee good coverage effect.
The coupling circuit 210 of each coupling piece 200 can specifically include coupling part 211 and interconnecting piece 212.Coupling part 211 connects
It connects the two sides in interconnecting piece 212 and can be of coupled connections with phase shifter route 111.Specifically, each coupling can be set in the present embodiment
Length or the shape for closing the interconnecting piece 212 on piece 200 are different, and then are convenient for the processing sets up of coupling circuit 210.Certainly, may be used
It is different with length or shape that coupling part 211 is arranged, or the length or shape of coupling part 211 Yu interconnecting piece 212 are set simultaneously
It is different.
Certainly, in this other embodiments, the length of the phase shifter route 111 of each radiant output unit 110 also can be set
Degree or shape are different.At this point, when the phase shifter route 111 of each phase shift function unit and coupling circuit 210 relatively move, antenna letter
Number transmission range variation it is also different.Therefore, each phase shift function unit may be that each radiating element provides different phase changes
Change.
In one embodiment, the line width of the power divider route 112 of each radiant output unit 110 is different.Power point
The line width of orchestration route 112 determines the intensity for being output to the aerial signal at radiant output end 113.Therefore, design can be passed through
The line width of the power divider route 112 of each radiant output unit 110 is different, and each radiant output end 113 is made to export difference
The aerial signal of intensity, so that radiating element can obtain the aerial signal of varying strength.
In one embodiment, with reference to Fig. 1, phase shifter package further includes pull rod 400 and at least two rotating bars 500.
Pull rod 400 can move left and right under the drive of transmission device.Each rotating bar 500 includes first end 510 and second end
520.The first end 510 of each rotating bar 500 is connected to pull rod 400.Specifically, a mistake can be equipped in each rotating bar 500
Hole 500a.Pull rod 400 is equipped at least two connection structures, 310 (the connection knot for the via hole 500a that each rotating bar 500 can be inserted
Structure 310 can be the connector being mounted on pull rod, can also be the structure of pull rod itself) so that pull rod 400 moves left and right
When, each rotating bar 500 can be driven and rotate.
Rotating bar 500 it is corresponding to coupling piece 200 setting and quantity it is identical.Meanwhile the second end 520 of each rotating bar 500 is equal
It is coaxially connected with corresponding coupling piece 200.Therefore, when pull rod 400 moves left and right under the drive of transmission device, rotating bar 500
It can be rotated coaxially around the rotation axis of the two with coupling piece 200, so that the phase shifter route of same phase shift function unit
111 relatively move with coupling circuit 210.At this point, but the shape of setting phase shifter route 111 is arc-shaped.
In one embodiment, with reference to Fig. 3, radiant output end 113 includes the first output end 1131 and second output terminal
1132, so that radiant output end 113 can carry out two-way output.At this point it is possible to which it includes polarization mode that radiating element, which is arranged,
Different the first subelements (for example, by using vertical polarization mode) and the second subelement (for example, by using horizontal polarization mode).Together
First output end 1131 at one radiant output end 113 and second output terminal 1132 and the first subelement of corresponding radiating element with
And second subelement electrical connection so that antenna for base station be dipole antenna.Certainly, the application antenna for base station may be monopole
Antenna, the application are not limited thereto system.
Meanwhile with continued reference to Fig. 3, it includes the first phase-shift line that phase shifter route 111, which can also be further arranged, in the present embodiment
Road 1111 and the second phase shift route 1112.Power divider route 112 includes the first distributed lines 1121 and the second distribution
Route 1122.
First distributed lines 1121 are electrically connected the first phase shift route 1111 and the first output end 1131, the second distributed lines
1122 the second phase shift routes 1112 of electrical connection and second output terminal 1132, and then improve the power transmission function of antenna.
Certainly, the application is not limited thereto system, the phase shifter route 111 and power divider route of the present embodiment
112 can also be unlike this.For example, first output end 1131 and second output terminal 1132 at radiant output end 113 can also be with
It is drawn by same power divider route 112.
In one embodiment, feeding network 100 further includes the second power divider route 120.Second power divider
Route 120 is used for transmission aerial signal.Specifically, the second power divider route 120 is electrically connected the radiant output of one of them
The phase shifter route 111 of unit 110.
During base station antenna radiation electromagnetic wave signal, the second power divider route 120 is by the day from base station
Line signal distributes certain quantity of power to the radiant output unit 110 being connected electrically according to a certain percentage.Then by above-mentioned
The mode of embodiment introduction, the aerial signal from base station, which is eventually passed through, is electrically connected radiating element with each radiant output unit 110
Give off electromagnetic wave signal.
During antenna for base station receives electromagnetic wave signal, each radiant output unit 110 is electrically connected radiating element radiation
It receives electromagnetic wave signal and is translated into electric signal, electric signal is summarized step by step then and is transmitted to the second power divider route
120, the second power divider route 120 is by the electric signal transmission finally summarized to base station.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of phase shifter package characterized by comprising
At least two coupling pieces, each coupling piece includes coupling circuit；
Feeding network, including at least two radiant output units being electrically connected to each other, the radiant output unit is coupled with described
Piece is accordingly arranged and quantity is identical, and each radiant output unit includes phase shifter route, power divider route and spoke
Penetrate output end, the coupling circuit of the phase shifter route and corresponding coupling piece is of coupled connections and can be described with travel(l)ing phase
Power divider route is electrically connected the phase shifter route and the radiant output end, and the radiant output end is for being electrically connected
Radiating element.
2. phase shifter package according to claim 1, which is characterized in that the length of the coupling circuit on each coupling piece
Or shape is different.
3. phase shifter package according to claim 2, which is characterized in that the coupling circuit includes coupling part and connect
Portion, the coupling part is connected to the two sides of the interconnecting piece and can be of coupled connections with the phase shifter route, on each coupling piece
Interconnecting piece length or shape it is different.
4. phase shifter package according to claim 1, which is characterized in that the phase shifter line of each radiant output unit
The length or shape on road are different.
5. phase shifter package according to claim 1, which is characterized in that the power divider route of each radiant output unit
Line width it is different.
6. phase shifter package according to claim 1, which is characterized in that
The phase shifter package further includes pull rod and at least two rotating bars, and the rotating bar is corresponding to the coupling piece to be arranged
And quantity is identical, each rotating bar includes first end and second end,
The first end of each rotating bar is connected to the pull rod, the second end of each rotating bar with the corresponding coupling
It is coaxially connected to close piece,
The pull rod is mobile to drive the rotating bar rotation, and the rotating bar rotation drives the coupling piece and the rotating bar same
Axis rotation.
7. phase shifter package according to claim 1, which is characterized in that the radiant output end include the first output end with
And second output terminal.
8. phase shifter package according to claim 7, which is characterized in that
The phase shifter route includes the first phase shift route and the second phase shift route, and the power divider route includes first
Distributed lines and the second distributed lines；
First distributed lines are electrically connected the first phase shift route and first output end, second distributed lines
It is electrically connected the second phase shift route and the second output terminal.
9. phase shifter package according to claim 1, which is characterized in that the feeding network further includes the second power distribution
Device route, the second power divider route are electrically connected the phase shifter route of the radiant output unit described in one of them, use
In transmission antenna signal.
10. a kind of antenna for base station, including at least two radiating elements and the described in any item phase shifter groups of claim 1-9
Part, the radiating element it is corresponding to the radiant output unit setting and quantity it is identical, the radiation of each radiant output unit
Output end is electrically connected to corresponding radiating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910760341.1A CN110474135A (en) | 2019-08-16 | 2019-08-16 | Phase shifter package and antenna for base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910760341.1A CN110474135A (en) | 2019-08-16 | 2019-08-16 | Phase shifter package and antenna for base station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110474135A true CN110474135A (en) | 2019-11-19 |
Family
ID=68510993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910760341.1A Pending CN110474135A (en) | 2019-08-16 | 2019-08-16 | Phase shifter package and antenna for base station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110474135A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1505850A (en) * | 2001-02-19 | 2004-06-16 | 3 | Cellular base station antenna |
| EP2259379A2 (en) * | 2009-05-22 | 2010-12-08 | Alpha Wireless Limited | A phase shifter |
| CN103975485A (en) * | 2013-12-02 | 2014-08-06 | 广东通宇通讯股份有限公司 | Base station antenna feed network |
| US20150214593A1 (en) * | 2014-01-24 | 2015-07-30 | Gamma Nu, Inc. | High-frequency phase shifter capable of shielding radiation |
| CN210156523U (en) * | 2019-08-16 | 2020-03-17 | 广东曼克维通信科技有限公司 | Phase shifter assembly and base station antenna |
-
2019
- 2019-08-16 CN CN201910760341.1A patent/CN110474135A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1505850A (en) * | 2001-02-19 | 2004-06-16 | 3 | Cellular base station antenna |
| EP2259379A2 (en) * | 2009-05-22 | 2010-12-08 | Alpha Wireless Limited | A phase shifter |
| CN103975485A (en) * | 2013-12-02 | 2014-08-06 | 广东通宇通讯股份有限公司 | Base station antenna feed network |
| US20150214593A1 (en) * | 2014-01-24 | 2015-07-30 | Gamma Nu, Inc. | High-frequency phase shifter capable of shielding radiation |
| CN210156523U (en) * | 2019-08-16 | 2020-03-17 | 广东曼克维通信科技有限公司 | Phase shifter assembly and base station antenna |
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