CN114122740A - Feeding device for realizing wide and narrow beam switching of MIMO array antenna - Google Patents
Feeding device for realizing wide and narrow beam switching of MIMO array antenna Download PDFInfo
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- CN114122740A CN114122740A CN202111435242.XA CN202111435242A CN114122740A CN 114122740 A CN114122740 A CN 114122740A CN 202111435242 A CN202111435242 A CN 202111435242A CN 114122740 A CN114122740 A CN 114122740A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 22
- 230000008878 coupling Effects 0.000 claims description 20
- 238000010168 coupling process Methods 0.000 claims description 20
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- 238000002955 isolation Methods 0.000 claims description 11
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0075—Stripline fed arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/04—Multimode antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
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Abstract
The invention provides a feeding device for realizing wide and narrow beam switching of an MIMO array antenna, which comprises: the power distribution network, the phase change control mechanism and the impedance change mechanism; the power distribution network comprises: a signal transmission strip line having: the signal input end, the first signal output end and the second signal output end; the phase change control mechanism is arranged on a transmission path between the signal input end and the first signal output end in a sliding manner, can be communicated or disconnected with the signal input end and the first signal output end, and can adjust the length of the transmission path between the signal input end and the first signal output end in a sliding manner when being communicated; the impedance transformation mechanism is arranged on the signal transmission belt line where the signal input end is positioned in a sliding manner and can adjust the relative coverage area of the dielectric block and the signal transmission belt line in a sliding manner. The invention can realize the wide and narrow beam switching of the MIMO array antenna aiming at different application scenes, thereby realizing different service beam coverage.
Description
Technical Field
The invention relates to the technical field of mobile communication antennas, in particular to a feeding device for realizing wide and narrow beam switching of an MIMO array antenna.
Background
With the rapid development of mobile communication, 5G communication technology is mature, and a base station is an important part of 5G development application. At present, for different application scenarios, the form of the 5G MIMO base station antenna is also more and more diversified, for example, a common 64TR base station antenna without an integrated filter, a 64TR MIMO base station antenna with an integrated filter, a 32TR electrically tunable antenna without an integrated filter, and the like.
However, with the development of different services, for example, different communication coverage areas without changing the form of the antenna, some flexible design needs to be made on the conventional implementation manner at present to meet different service requirements. Therefore, it is necessary to provide a further solution to the above-mentioned needs.
Disclosure of Invention
The present invention is directed to a MIMO array antenna to overcome the disadvantages of the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a feeding device for implementing wide and narrow beam switching of a MIMO array antenna, comprising: the power distribution network, the phase change control mechanism and the impedance change mechanism;
the power distribution network comprises: a signal transmission strip line having: the signal input end, the first signal output end and the second signal output end;
the phase change control mechanism is arranged on a transmission path between the signal input end and the first signal output end in a sliding manner, can connect or disconnect the signal input end and the first signal output end, and can adjust the length of the transmission path between the signal input end and the first signal output end in a sliding manner when the signal input end and the first signal output end are connected;
the impedance transformation mechanism is arranged on the signal transmission belt line where the signal input end is located in a sliding mode, and the characteristic impedance of a belt line area covered by the impedance transformation mechanism can be adjusted through sliding.
As an improvement of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention, the signal transmission strip line includes: a first signal transmission strip line, a second signal transmission strip line and a third signal transmission strip line;
the second signal transmission strip line is U-shaped, and one end of the first signal transmission strip line is connected to the middle position of the second signal input end; the third signal transmission strip line is positioned outside the U-shaped arm on one side of the second signal transmission strip line in parallel.
As a feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention, the other end of the first signal transmission strip line forms a signal input terminal, the one end of the third signal transmission strip line forms a second signal output terminal, the other end of the third signal transmission strip line is aligned with the end of the U-shaped arm on one side, and the end of the U-shaped arm on the other side of the second signal transmission strip line forms a first signal output terminal.
As an improvement of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention, the phase change control mechanism includes a U-shaped coupling strip line, the U-shaped coupling strip line is slidably disposed between the third signal transmission strip line and the U-shaped arm on one side of the second signal transmission strip line, and one end of the U-shaped coupling strip line is capable of being coupled to the other end of the third signal transmission strip line, and the other end of the U-shaped coupling strip line is capable of being coupled to the end of the U-shaped arm on the one side.
As an improvement of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention, the U-shaped coupling strip line is fixed on a dielectric substrate.
As an improvement of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention, the impedance transforming mechanism includes a sliding dielectric block, and the sliding dielectric block is slidably disposed on the first signal transmission strip line and coupled to the first signal transmission strip line.
As an improvement of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention, the impedance transforming mechanism further includes a metal cover body, the metal cover body is fixed above the first signal transmission strip line through a metal pad, and the sliding dielectric block can be accommodated in the metal cover body.
As an improvement of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention, the length of the first signal transmission strip line is 1/4 × λ, and the open end line length L1+ L2 of the power distribution network is 1/4 × λ + n/2 × λ, where λ is a wavelength, and n is 1,2 … ….
As an improvement of the feeding apparatus for implementing wide and narrow beam switching by the MIMO array antenna of the present invention, the power distribution network further includes: a metal ground, a dielectric substrate, and an insulating isolation film;
the dielectric substrate is located on one surface of the metal ground, and the insulating isolation films are located between the signal transmission strip line and the phase change control mechanism and between the signal transmission strip line and the impedance transformation mechanism.
Compared with the prior art, the invention has the beneficial effects that:
the invention can realize the wide and narrow beam switching of the MIMO array antenna aiming at different application scenes, thereby realizing different service beam coverage.
Through the structural design, the invention can realize a physical phase shifting mode, change different downtilts of the array antenna and simultaneously realize the control of the electrical downtilt.
The invention has simple structure and can conveniently realize the mode switching of the phase-shifting state and the fracture state. And the scheme can realize perfect impedance matching between the phase-shifting state and the fracture state, and reduce signal loss.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a feeding device for implementing wide and narrow beam switching for a MIMO array antenna according to an embodiment of the present invention;
fig. 2 is a schematic exploded perspective view of a feeding device for implementing wide-narrow beam switching of the MIMO array antenna in fig. 1;
fig. 3 is a schematic diagram of a phase-shifting operating state of a feeding device for implementing wide and narrow beam switching by the MIMO array antenna according to the present invention in a phase-shifting operating mode;
fig. 4 is a schematic diagram of a fracture working state of a feed device for implementing wide and narrow beam switching of the MIMO array antenna according to the present invention in a fracture working mode;
FIG. 5 is a standing wave simulation diagram of a signal input end of a feeding device for realizing wide and narrow beam switching of the MIMO array antenna according to the present invention in a phase-shifting mode;
fig. 6 is a simulation result diagram of the first signal output end and the second signal output end of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna according to the present invention in the phase-shifting operation mode;
fig. 7 is a standing wave simulation diagram of a signal input end in a breaking working mode of a feeding device for implementing wide and narrow beam switching of the MIMO array antenna according to the present invention;
fig. 8 is an insertion loss simulation diagram of the first signal output end in the breaking working mode of the feeding device for implementing wide and narrow beam switching of the MIMO array antenna of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides a feeding apparatus for implementing wide and narrow beam switching for a MIMO array antenna, including: a power distribution network 10, a phase change control mechanism 20, and an impedance transformation mechanism 30.
The power distribution network 10 includes: signal transmission band line 11, metal ground 12, dielectric substrate 13, insulating isolating film 14.
The signal transmission line 11 includes: a signal input terminal 110, a first signal output terminal 111, and a second signal output terminal 112. In order to realize different communication coverage ranges based on the same MIMO array antenna, different use requirements are met. By adjusting the length of the transmission path between the signal input terminal 110 and the second signal output terminal 112, and the connection and disconnection therebetween, the corresponding electrical downtilt control and the beam width control of the array antenna can be achieved.
Specifically, the phase change control mechanism 20 is slidably disposed on the transmission path between the signal input port 110 and the first signal output port 111, and by controlling the sliding distance of the phase change control mechanism 20, the phase change is realized from the change of the signal transmission path between the input port 110 and the first signal output port 111; the phase change control mechanism 20 is continuously slid until the strip line 11 is completely disconnected from the strip line 21, so that the wide-narrow switching of the array beam is realized.
Therefore, mode switching of a phase-shifting state and a breaking state can be conveniently realized. And the length of the transmission path between the signal input end 110 and the second signal output end 112 can be adjusted by sliding when the two ends are connected, so that corresponding phase change is caused, and the control of the phase of the second signal output end 112 is realized. Meanwhile, the signal phases of the first signal output end 111 and the second signal output end 112 are also changed correspondingly, so that the corresponding control of the electrical downtilt is realized.
That is, when the phase change control mechanism 20 slides within a certain stroke range, the signal input terminal 110 and the first signal output terminal 111 can be kept connected, and with the sliding of the phase change control mechanism 20, the transmission line state of the power distribution network 10 changes, which further causes the transmission path length between the signal input terminal 110 and the second signal output terminal 112 to change. When the phase change control mechanism 20 moves to be separated from the signal input terminal 110 and the first signal output terminal 111, the signal input terminal 110 and the first signal output terminal 111 are disconnected, and the phase shift state is converted into the breaking state.
In one embodiment, the signal transmission strip line 11 includes: a first signal transmission strip line 101, a second signal transmission strip line 102, and a third signal transmission strip line 103.
The second signal transmission strip line 102 is U-shaped, and one end of the first signal transmission strip line 101 is connected to the middle position of the second signal input end 110; the third signal transmission strip line 103 is located in parallel outside the U-shaped arm on the side of the second signal transmission strip line 102.
At this time, the other end of the first signal transmission strip line 101 forms a signal input terminal 110, the one end of the third signal transmission strip line 103 forms a second signal output terminal 112, the other end is aligned with the end of the U-shaped arm on one side, and the end of the U-shaped arm on the other side of the second signal transmission strip line 102 forms a first signal output terminal 111.
Based on the power distribution network 10 with the above structure, the phase change control mechanism 20 includes a U-shaped coupling strip 21. The U-shaped coupling strip 21 is fixed to a dielectric substrate 22. At this time, the U-shaped coupling strip line 21 is slidably disposed between the third signal transmission strip line 103 and the U-shaped arm on the second signal transmission strip line 102, and one end thereof can be coupled and conducted with the other end of the third signal transmission strip line 103, and the other end thereof can be coupled and conducted with the end of the U-shaped arm on the one side.
As shown in fig. 3 and 4, when an external force is applied to the U-shaped coupling strip line 21 to slide, the signal transmission path from the signal input terminal 110 to the second signal output terminal 112 is lengthened or shortened, which causes a corresponding phase change, and the phase of the second signal output terminal 112 is controlled, so that the phase difference between the signals of the first signal output terminal 111 and the second signal output terminal 112 is correspondingly changed, and the corresponding electrical downtilt is controlled.
With the continuous sliding of the U-shaped coupling strip 21, the operating state is the breaking operating state until the U-shaped coupling strip 21 is completely separated from the signal input terminal 110 to the second signal output terminal 112. Because the array sub-units of the second signal output end 112 are in the non-operating state, the number of the array units is correspondingly reduced, so that the MIMO array antenna completes the mode switching from the narrow beam operating mode to the wide beam operating mode; on the contrary, when the state is switched from the broken state to the phase-shifting state, the number of array units is correspondingly increased, so that the MIMO array antenna completes the mode switching from the wide beam working mode to the narrow beam working mode, thereby realizing different service beam coverage.
Further, a dielectric substrate 13 is disposed on one side of the metal ground 12, and an insulating isolation film 14 is disposed between the signal transmission strip line 11 and the U-shaped coupling strip line 21. The insulating isolation film 14 can be realized by coating green oil or plating film. The insulating isolation film 14 can isolate the U-shaped coupling strip line 21 from the U-shaped arms on the third signal transmission strip line 103 and the second signal transmission strip line 102. Meanwhile, the insulating isolation film 14 can protect the U-shaped arms on one side of the U-shaped coupling strip line 21, the third signal transmission strip line 103 and the second signal transmission strip line 102, so as to prevent the metal strip lines from being abraded in the sliding sheet moving process. In one embodiment, the insulating isolation films 14 are formed on the respective regions of the signal transmission strip line 11 and the U-shaped coupling strip line 21.
In order to avoid impedance mismatch when the control device 20 performs switching between the sliding phase shift state and the fracture state, which affects impedance matching between the signal input terminal 110 and the first signal output terminal 111, correspondingly, an impedance transformation mechanism 30 is added to the first signal transmission strip line 101 on which the signal input terminal 110 is located, which can slide relative to the first signal transmission strip line 101, and further change the relative area therebetween, so that the characteristic impedance of the strip line region covered by the impedance transformation mechanism can be adjusted by sliding, and impedance matching between the signal input terminal 110 and the first signal output terminal 111 is achieved.
Specifically, the impedance transforming mechanism 30 includes: a sliding medium block 32 and a metal cover 31.
Wherein, the sliding medium block 32 is slidably disposed on the first signal transmission strip line 101 and coupled with the first signal transmission strip line 101. The metal cap 31 is fixed above the first signal transmission strip line 101 by a metal pad 15 on the dielectric substrate 13, and electrical conduction of the metal cap 31 to the metal ground 12 is achieved by the metal pad 15. The sliding medium block 32 can be accommodated in the metal cover 31 and closely attached to the first signal transmission line 101. Meanwhile, the edge isolation film 14 is located between the signal transmission line 11 and the impedance transforming mechanism 30. The insulating isolation film 14 may be formed by coating a green oil or a plating film, and may protect the sliding dielectric block 32 and the first signal transmission strip line 101.
When the phase change control mechanism 20 continuously slides until the strip lines 102, 103 and 21 are completely separated, the wide and narrow beam switching of the array antenna is completed, and simultaneously the sliding dielectric block 32 also slides until the coverage area of the sliding dielectric block 32 is completely separated from the strip line 101, so that the impedance transformation is completed, and the impedance matching between the signal input end 110 and the first signal output end 111 is realized. In one embodiment, according to microwave transmission line theory: the length of the first signal transmission strip 101 is 1/4 × λ, and the open end line length L1+ L2 of the power distribution network 10 is 1/4 × λ + n/2 × λ, where λ is a wavelength, and n is 1,2 … …. When the above relation is satisfied, the input impedance of the open end is 0, and the impedance transformation device also completes the corresponding impedance transformation.
To verify the technical effect of the MIMO array antenna of the present invention, fig. 7 and 8 show the same.
Fig. 5 and 6 show results of simulation of the standing wave at the input end of the signal, the first signal output end and the second signal output end in the phase-shift operating mode according to the embodiment of the present invention, where the standing wave at the input end is not more than 1.1 in the simulation result, and the first signal output end and the second signal output end have good matching performance, and have good power distribution performance (or may be in an unequal power division state) when the standing wave at the input end is between-3.19 dB and-3.27 dB.
Fig. 7 and 8 show insertion loss of the signal input terminal and the first signal output terminal in the fracture state operating mode according to the embodiment of the present invention, from the simulation result, the signal input terminal is less than or equal to 1.15, and has a good matching performance, and meanwhile, the insertion loss of the output port of the first signal output terminal is less than or equal to-0.26, and has a good transmission performance.
In summary, the present invention can implement wide and narrow beam switching of the MIMO array antenna in different application scenarios, thereby implementing different service beam coverage. Through the structural design, the invention can realize a physical phase shifting mode, change different downtilts of the array antenna and simultaneously realize the control of the electrical downtilt. The invention has simple structure and can conveniently realize the mode switching of the phase-shifting state and the fracture state. And the scheme can realize perfect impedance matching between the phase-shifting state and the fracture state, and reduce signal loss.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A feeding device for realizing wide and narrow beam switching of a MIMO array antenna is characterized in that the feeding device for realizing wide and narrow beam switching of the MIMO array antenna comprises: the power distribution network, the phase change control mechanism and the impedance change mechanism;
the power distribution network comprises: a signal transmission strip line having: the signal input end, the first signal output end and the second signal output end;
the phase change control mechanism is arranged on a transmission path between the signal input end and the first signal output end in a sliding manner, can connect or disconnect the signal input end and the first signal output end, and can adjust the length of the transmission path between the signal input end and the first signal output end in a sliding manner when the signal input end and the first signal output end are connected;
the impedance transformation mechanism is arranged on the signal transmission belt line where the signal input end is located in a sliding mode, and the characteristic impedance of a belt line area covered by the impedance transformation mechanism can be adjusted through sliding.
2. The feeding apparatus for implementing wide and narrow beam switching of the MIMO array antenna according to claim 1, wherein the signal transmission line comprises: a first signal transmission strip line, a second signal transmission strip line and a third signal transmission strip line;
the second signal transmission strip line is U-shaped, and one end of the first signal transmission strip line is connected to the middle position of the second signal input end; the third signal transmission strip line is positioned outside the U-shaped arm on one side of the second signal transmission strip line in parallel.
3. The feeding apparatus for implementing wide and narrow beam switching of a MIMO array antenna according to claim 2, wherein the other end of the first signal transmission strip line forms a signal input terminal, the one end of the third signal transmission strip line forms a second signal output terminal, the other end of the third signal transmission strip line is aligned with the end of the U-shaped arm on one side, and the end of the U-shaped arm on the other side of the second signal transmission strip line forms a first signal output terminal.
4. The feeding device for implementing wide and narrow beam switching of a MIMO array antenna according to claim 3, wherein the phase change control mechanism includes a U-shaped coupling strip line, the U-shaped coupling strip line is slidably disposed between the third signal transmission strip line and the U-shaped arm on one side of the second signal transmission strip line, and one end of the U-shaped coupling strip line is capable of being coupled to the other end of the third signal transmission strip line, and the other end of the U-shaped coupling strip line is capable of being coupled to the end of the U-shaped arm on one side.
5. The feeding device for implementing wide and narrow beam switching of the MIMO array antenna according to claim 4, wherein the U-shaped coupling strip line is fixed on a dielectric substrate.
6. The feeding apparatus for implementing wide and narrow beam switching of a MIMO array antenna as claimed in claim 3, wherein the impedance transforming mechanism includes a sliding dielectric block, and the sliding dielectric block is slidably disposed on the first signal transmission strip line and coupled to the first signal transmission strip line.
7. The feeding device for implementing wide-and-narrow beam switching of the MIMO array antenna according to claim 6, wherein the impedance transformation mechanism further includes a metal cover, the metal cover is fixed above the first signal transmission strip line by a metal pad, and the sliding dielectric block is capable of being housed in the metal cover.
8. The feeding device for implementing wide and narrow beam switching of the MIMO array antenna according to claim 6, wherein the length of the first signal transmission strip line is 1/4 λ, and the length of the open end line of the power distribution network is L1+ L2 ═ 1/4 λ + n/2 λ, where λ is wavelength, and n ═ 0,1,2 … ….
9. The MIMO array antenna of any one of claims 1 and 4-7, wherein the power division network further comprises: a metal ground, a dielectric substrate, and an insulating isolation film;
the dielectric substrate is located on one surface of the metal ground, and the insulating isolation films are located between the signal transmission strip line and the phase change control mechanism and between the signal transmission strip line and the impedance transformation mechanism.
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| CN109638391A (en) * | 2018-11-09 | 2019-04-16 | 华南理工大学 | Moving-medium phase shifter and antenna for base station |
| CN112271420A (en) * | 2020-11-03 | 2021-01-26 | 深圳市深大唯同科技有限公司 | Microstrip phase shifter |
| CN112751148A (en) * | 2020-12-24 | 2021-05-04 | 京信通信技术(广州)有限公司 | Phase shifter and electrically tunable antenna |
| CN113178700A (en) * | 2020-12-28 | 2021-07-27 | 京信通信技术(广州)有限公司 | Phase shifter, power division network, antenna and base station |
| CN112803163A (en) * | 2020-12-31 | 2021-05-14 | 华南理工大学 | Phase shift circuit, phase shifter and antenna |
| CN113193313A (en) * | 2021-05-27 | 2021-07-30 | 摩比天线技术（深圳）有限公司 | Phase shifter and antenna system |
| CN113410593A (en) * | 2021-06-11 | 2021-09-17 | 京信通信技术(广州)有限公司 | Power distribution network, phase shifting device and antenna |
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Application publication date: 20220301 |