CN113517561A - High-isolation antenna for 5G mobile communication - Google Patents
High-isolation antenna for 5G mobile communication Download PDFInfo
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- CN113517561A CN113517561A CN202110412042.6A CN202110412042A CN113517561A CN 113517561 A CN113517561 A CN 113517561A CN 202110412042 A CN202110412042 A CN 202110412042A CN 113517561 A CN113517561 A CN 113517561A
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- 238000002955 isolation Methods 0.000 title claims abstract description 32
- 238000010295 mobile communication Methods 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 238000004512 die casting Methods 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000003491 array Methods 0.000 claims abstract description 9
- 230000005855 radiation Effects 0.000 claims description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 2
- 230000001808 coupling effect Effects 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 238000004422 calculation algorithm Methods 0.000 description 2
- 238000005388 cross polarization Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
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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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a high-isolation antenna for 5G mobile communication in the field of mobile communication, which comprises a reflection bottom plate with an adjustable angle, wherein a metal isolation strip and a plurality of die-casting antenna arrays arranged in an array are fixed on the reflection bottom plate; and the bottom of the reflection bottom plate is also fixedly provided with a power divider, and the power divider is connected with the die-cast antenna array through a coaxial transmission line. The invention reduces the mutual coupling effect between the antenna units and reduces the risk of signal crosstalk.
Description
Technical Field
The invention relates to the field of mobile communication, in particular to a high-isolation antenna for 5G mobile communication.
Background
With the explosive growth of mobile broadband services, 5G communication systems have been deployed commercially. The outdoor macro station, the indoor small station, the micro station and the like form a three-dimensional coverage network, so that the network density is increased. In order to meet the increasing demand for network optimization, operators need to seek an antenna scheme with easy operation, high efficiency, low cost and high flexibility. Antenna downtilt is a common method for realizing network optimization, however, mechanical downtilt will cause pattern distortion, increase inter-cell interference, affect user experience, and hardly meet the network operation requirements of high efficiency and large data volume. For the design of the base station antenna, the horizontal plane directional diagram of the antenna array is determined by the form of the antenna unit and the cross section shape of the reflecting plate, and the radiation parameters such as horizontal plane half-power beam width, front-to-back ratio and the like are decisive. The dual-polarized base station antenna array shows good performance in the aspects of meeting the requirement of multi-system co-site and rapid development of micro-cells, and is concerned by the industry. The broadband and miniaturized dual-polarized base station array antenna can effectively reduce call loss and interference, and is widely applied to an LTE system.
The broadband dual-polarized antenna for base station communication in the prior art still has the problems of insufficient isolation and signal crosstalk, and the applicant proposes an improvement on the problem.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a wide beam array antenna based on dual-polarized crossed dipole units, aims to achieve the purposes of optimizing coverage and inhibiting same frequency interference by adjusting the beam width, and provides a high-performance base station antenna for urban living environments.
In order to achieve the purpose, the invention provides the following technical scheme:
a high isolation antenna for 5G mobile communication comprises a reflection bottom plate with an adjustable angle, wherein a metal isolation strip and a plurality of die-casting antenna arrays arranged in an array are fixed on the reflection bottom plate, the die-casting antenna arrays are symmetrically arranged in front and back of the metal isolation strip, and the metal isolation strip and the top of the die-casting antenna array are positioned at the same height; and the bottom of the reflection bottom plate is also fixedly provided with a power divider, and the power divider is connected with the die-cast antenna array through a coaxial transmission line.
As an improved scheme of the invention, the center distance between the left die-cast antenna array and the right die-cast antenna array which are adjacent to each other and are positioned on the same side of the metal isolating strip is 85 +/-10 mm, and the center distance between the front die-cast antenna array and the back die-cast antenna array which are adjacent to each other and are positioned on the different sides is 70 +/-10 mm.
As a development of the invention, four die-cast antenna elements are provided, forming a 2 x 2 antenna array.
As an improved scheme of the invention, the die-cast antenna array comprises a feed sheet, a balun and two groups of orthogonally placed radiation arms, wherein each of the two groups of radiation arms corresponds to one balun and is vertically fixed with the balun, and the balun is fixed on a reflection bottom plate and is connected with a coaxial transmission line; the number of the radiating arms of each group is two, the feed sheet comprises two crossed but non-contact multi-section bent copper sheets, one end of each copper sheet is connected with one radiating arm, and the other end of each copper sheet penetrates through the other radiating arm of the same group downwards and then is connected with the balun.
As a modified scheme of the invention, the surface of the radiation arm is hollowed.
As a modified scheme of the invention, an aluminum block extends downwards from the bottom of the outer end of the radiation arm.
As an improved scheme of the invention, the left side and the right side of the reflection bottom plate are both provided with angle adjusting devices, each angle adjusting device comprises an L-shaped structural member, the side surface of each L-shaped structural member is provided with an arc-shaped adjusting hole, the reflection bottom plate is rotationally fixed on the side surface of each L-shaped structural member, and the left side surface and the right side surface of the reflection bottom plate are also provided with columns which can limit and slide in the arc-shaped adjusting holes.
As an improved scheme of the present invention, the power divider includes two one-to-four power dividers and one-to-two power divider, and the one-to-four power divider and the one-to-two power divider are T-type microstrip power dividers.
As a modified scheme of the invention, two N-shaped joints are fixed on the lower surface of the reflecting bottom plate.
Has the advantages that: the invention increases the metal isolation strips with equal height at the central line of the front die-casting antenna array and the rear die-casting antenna array, thereby reducing the mutual coupling effect between the antenna units and reducing the risk of signal crosstalk. Meanwhile, the space between the elements of the antenna array is optimized by adopting an optimization algorithm, so that the beam width of a directional diagram is greatly improved, and the dual-polarized antenna array has low cross polarization and simultaneously shows good dual-polarized radiation characteristics.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic bottom view of the present invention;
FIG. 3 is a schematic structural diagram of a reflective backplane of the present invention;
fig. 4 is a schematic structural diagram of the die-cast antenna array of the present invention;
FIG. 5 is a schematic bottom view of the die cast antenna array of the present invention;
FIG. 6 is a schematic structural diagram of a metal spacer bar according to the present invention;
FIG. 7 is a schematic structural view of an angle adjustment apparatus according to the present invention;
FIG. 8 is an S parameter simulation and actual map of return loss of the present invention;
fig. 9 is a simulated and actual view of the 1710MHz antenna radiation pattern of the 2 x 2 antenna array of the present invention;
fig. 10 is a simulated and actual view of the 2200MHz antenna radiation pattern of the 2 x 2 antenna array of the present invention;
fig. 11 is a simulated and actual view of the 2690MHz antenna radiation pattern of the 2 x 2 antenna array of the present invention.
In the figure: 1-a reflective backplane; 11-a circular hole; 12-holes; 13-a fixation hole; 14-a column; 15-well; 2-die casting the oscillator antenna; 21-a feed tab; 22-balun; 23-a radiating arm; 24-a coaxial transmission line; 25-an aluminum block; 3-a metal spacer bar; 31-L type fixed bend angle; 32-rectangular voids; 4-angle adjusting means; 41-radian adjusting holes; 42-mounting holes; 43-L-shaped structural member.
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.
Referring to fig. 1-2, a high isolation antenna for 5G mobile communication, includes that reflection bottom plate 1, die-casting oscillator antenna 2, metal parting strip 3, merit divide the ware, wherein reflection bottom plate 1 passes through angle adjusting device angle regulation, and angle adjusting device, reflection bottom plate 1, die-casting array antenna 2 and metal parting strip are the CNC machine and add the aluminium material. The overall size of the invention is 270mm 129mm 131mm (length width height).
In example 1, the number of die-cast array antennas 2 is 4 in total, and 2 × 2 antenna arrays are formed. In other embodiments, arrays with different forms such as 4 × 4 may also be used, and the structure and principle of the die-cast array antenna are the same as those in the present embodiment. As shown in fig. 4-5, the die-cast antenna element 2 has an overall size of 53.14mm × 53.14mm × 47.06mm (length × width × height), and includes a feed tab 21 made of a metal material, a balun 22, a radiation arm 23, and a plastic spacer 25. The number of the baluns 22 is two, and the baluns are fixed on the reflecting base plate 1 through the circular holes 11 to support the antenna and the impedance transformation. A plastic shim 25 is placed between the balun 22 and the reflective backplane 1, cutting off the current propagation path.
The radiating arms 23 are provided in two orthogonal sets, each set consisting of two diecast bodies of the same size and shape (length, width, 25.12mm) and thickness, 3 mm. In a preferred embodiment, the surface of the radiating arm 23 is provided with a plurality of hollowed-out portions for reducing the weight of the die-cast antenna array 2, extending the current path, and reducing the overall size of the antenna. In a preferred embodiment, the bottom of the outer end of the radiating arm 23 extends downward by an aluminum block 25 with a length of 4mm to extend the current path and reduce the lateral dimension of the radiating arm 23.
Each set of radiating arms 23 is fixed perpendicular to one balun 22. The feed piece 21 comprises two mutually crossed but non-contact multi-segment bent copper sheets, one end of each copper sheet is connected with the radiation arm 23, and the other end of each copper sheet passes through the same group of radiation arms 23 to be connected with the balun 22 for feeding the radiation arms 23. That is, two radiation arms 23 of the same group are diagonally disposed.
The balun 22 is used for impedance transformation and adjusting the impedance characteristics of the radiating arm 23. The coaxial transmission line 24 is formed of an aluminum column having a hollow cylindrical diameter and filled with a medium inside, and is integrally formed with the balun 22. The coaxial transmission line 24 is connected between the radiating arm 23 and the power divider, and is used for transmitting signals to the feeding sheet 21, and also plays a role in supporting the radiating arm 23.
The structure of the reflective backplane 1 is shown in figure 3. The upper surface of the reflection base plate 1 has four sets of round holes 11 for fixing the die-cast element antennas 2 corresponding to the number of the die-cast element antennas 2, and the diameter of the round holes 11 is 10.6mm in the embodiment. The distance between die-cast antenna elements is optimized by an algorithm and three-dimensional simulation software in the present embodiment, for example, for a 2 x 2 antenna array, the center distance between two adjacent die-cast antenna elements on the left and right on the same side of the metal spacer is 85 ± 10mm, preferably 85mm, and the center distance between two adjacent die-cast antenna elements on the front and back on the opposite side of the metal spacer is 70 ± 10mm, preferably 70 mm. Through simulation tests, the antenna arrays such as 2 x 2, 2 x 4 or 4 x 4 adopt the space, so that the characteristics of wide beams can be ensured, the mutual influence among the arrays can be reduced, and the isolation among the ports is improved.
The power divider comprises two one-to-four power dividers and one-to-two power divider, and the one-to-four power divider and the one-to-two power divider are T-shaped microstrip power dividers. The center of the reflecting bottom plate 1 is provided with an irregular hole 12, the hole 12 is used for installing and adjusting the one-to-two power divider 6, and the maximum size of the hole 12 in the embodiment is 65.5mm x 35mm (length x width). Two groups of 4 fixing holes 13 are respectively arranged on two sides of the hole 12 and are respectively used for fixing the two one-to-four power dividers. The one-to-four power divider and the one-to-two power divider are both connected with the die-cast antenna array 2 through a coaxial transmission line 24. Two N-type connectors are fixed on the lower surface of the reflecting bottom plate 1 and connected with a coaxial transmission line 24.
As shown in fig. 6, the metal spacer 3 includes two L-shaped fixing corners 31 and a rectangular gap 32, the L-shaped fixing corners 31 are used for fixing on the reflective base plate 1, and the rectangular gap 32 is used for reducing the overall weight. The whole size of metal parting strip 3 is 142mm 37mm (length is high), and is located same height with the top of die-casting antenna array 2 to die-casting antenna array 2 is around metal parting strip 3 symmetrical arrangement, has consequently reduced the mutual coupling effect between the antenna element, improves the isolation, has reduced the risk of signal crosstalk, the improvement antenna's of ability to a great extent radiation pattern.
In order to meet the actual communication requirements, in the present embodiment, the angle adjusting devices 4 are additionally installed on the left and right sides of the reflection base plate 1, so that the radiation angle of the antenna can be adjusted according to the actual situation, and the optimal communication performance is exerted.
The two sides of the reflection bottom plate 2 are both provided with folded plates, the outer side surfaces of the folded plates extend to form a metal column 14 with the length of about 5mm, and a hole 15 with the diameter of about 4mm is formed in the outer side surfaces of the folded plates. As shown in fig. 7, the angle adjusting means comprises an L-shaped structural member 43, the overall dimension of the L-shaped structural member 43 being about 78mm by 90mm (length by height). An arc-shaped adjusting hole 41 is formed in the side face of the L-shaped structural member 43, and the angle of the arc-shaped adjusting hole 41 can be 60 degrees. The side surface of the L-shaped structural member 43 is also provided with a mounting hole 42 with the diameter of 4mm, the mounting hole 42 is used for being matched with the hole 15, and the reflecting bottom plate 1 and the L-shaped structural member 43 are rotationally fixed through bolts and the like.
When the reflecting bottom plate 1 is installed and connected with the L-shaped structural member 43, the column 14 passes through the arc-shaped adjusting hole 41 and is limited by the arc-shaped adjusting hole. When the reflection base plate 1 is rotated back and forth with the mounting hole 42 as a base point, the radiation angle of the antenna can be adjusted, and the cylinder 14 slides in the arc-shaped adjusting hole 41. The bottom of the L-shaped structural member 43 is provided with two through holes with the diameter of 4mm, so that the antenna can be integrally fixed on the carrier.
The working principle of the invention is as follows: an input signal is input from the N-type connector, then transmitted to the one-to-two power divider through the coaxial transmission line 24, then transmitted to the one-to-four power divider through the coaxial transmission line 24, then enters the radiation arm 23 after being subjected to impedance conversion by the balun 22, and is emitted into the air after passing through the array antenna. The one-to-two power divider and the one-to-four power divider have the function of stabilizing amplitude-phase output, so that energy can be evenly distributed to each antenna. For the die-casting oscillator antenna 2, a hollow technology is adopted, so that the weight of the radiation arm 23 is reduced, the propagation path of current can be prolonged, and the die-casting oscillator antenna with good radiation performance is formed.
The technical effects of the present invention will be further explained by combining simulation and actual measurement experiments.
1. Simulation and actual measurement conditions and contents:
in the simulation experiment, electromagnetic simulation software HFSS _19.0 is adopted to simulate the frequency response of the invention within the range of 1710-.
The experiment was performed in a microwave dark room environment using a vector network analyzer N5230A. Experiment 1 the VSWR of the present invention was tested and the experimental results are shown in fig. 8. Experiment 2 the radiation patterns of the present invention at 1.71GHz, 2.2GH and 2.69GHz were tested and the results are shown in fig. 9, 10 and 11.
2. Simulation and actual measurement result analysis:
fig. 8 is a VSWR simulation and actual measurement diagram of the high isolation wide beam dual-polarized antenna for 5G mobile communication, in which the abscissa in fig. 8 is frequency and the unit is GHz; fig. 9-11 are radiation patterns, in dBi, for a high isolation wide beam dual polarized antenna for 5G mobile communications.
Fig. 8 shows that the high isolation wide beam mobile communication antenna of the present invention has good port characteristics, and the voltage standing wave ratio of both polarized ports is less than 1.5. The die-casting element antenna is provided with two resonance points, the first resonance point is located near 1710MHz, the second resonance point is located near 2500MHz, the impedance bandwidth of the antenna is widened through the interaction of the two resonance points, and the relative bandwidth of the antenna is 50% through calculation.
As can be seen from fig. 8, the high-isolation wide-beam mobile communication antenna of the present invention has good port isolation characteristics. The port isolation is a parameter for measuring the mutual influence degree between ports with different polarizations, and is a parameter which is not negligible in mobile communication, and the higher isolation is beneficial to the quality and the communication capacity of the mobile communication. In the working frequency band of 1710MHz-2690MHz, the isolation between the antenna ports of the invention is more than 20 dB.
Fig. 9-11 show antenna radiation patterns of different frequency points, which have excellent radiation performance, and as can be seen from fig. 9, the half-power beam width of the elevation surface of the invention at the low frequency point of 1710MHz is 48.4 degrees, the half-power beam width of the azimuth surface is 55.3 degrees, and the antenna gain is 10.68 dBi; as can be seen from fig. 10, the half-power beam width in the pitching plane of the medium frequency point 2200MHz of the present invention is 40.5 degrees, the half-power beam width in the azimuth plane is 49.1 degrees, and the antenna gain is 12.35 dBi; as can be seen from fig. 11, the half-power beamwidth at pitch of the present invention at a high frequency point of 2690MHz is 33.4 degrees, the half-power beamwidth at azimuth is 38.9 degrees, and the antenna gain is 13.15 dBi.
Therefore, the antenna has the characteristics of high isolation and wide beam, has low cross polarization and simultaneously shows good dual-polarization radiation characteristic.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (9)
1. The utility model provides a high isolation antenna for 5G mobile communication which characterized in that, includes angle regulation's reflection bottom plate, be fixed with the die-casting antenna array that metal parting strip and a plurality of array were arranged on the reflection bottom plate, symmetrical arrangement around the metal parting strip is about to the die-casting antenna array, and the top of metal parting strip and die-casting antenna array is located same height.
2. The high-isolation antenna for 5G mobile communication according to claim 1, wherein the distance between the centers of the two die-cast antenna arrays adjacent to each other on the left and right on the same side of the metal isolating strip is 85 ± 10mm, and the distance between the centers of the two die-cast antenna arrays adjacent to each other on the front and back on the opposite side is 70 ± 10 mm.
3. The high isolation antenna for 5G mobile communication according to claim 1, wherein the die-cast antenna elements are four in number, forming a 2 x 2 antenna array.
4. The high-isolation antenna for 5G mobile communication according to claim 1, wherein the die-cast antenna array comprises a feed plate, a balun and two groups of orthogonally placed radiating arms, the two groups of radiating arms respectively correspond to one balun and are vertically fixed with the balun, and the balun is fixed on the reflecting bottom plate and is connected with a coaxial transmission line; the number of the radiating arms of each group is two, the feed sheet comprises two crossed but non-contact multi-section bent copper sheets, one end of each copper sheet is connected with one radiating arm, and the other end of each copper sheet penetrates through the other radiating arm of the same group downwards and then is connected with the balun.
5. The high isolation antenna for 5G mobile communication according to claim 4, wherein the surface of the radiation arm is hollowed.
6. A high isolation antenna for 5G mobile communication according to claim 4 or 5, wherein an aluminum block extends downwards from the bottom of the outer end of the radiating arm.
7. The high isolation antenna for 5G mobile communication according to claim 1, wherein angle adjusting devices are installed on the left side and the right side of the reflection bottom plate, each angle adjusting device comprises an L-shaped structural member, an arc-shaped adjusting hole is formed in the side surface of each L-shaped structural member, the reflection bottom plate is rotationally fixed on the side surface of each L-shaped structural member, and cylinders sliding in the arc-shaped adjusting holes in a limiting manner are further arranged on the left side surface and the right side surface of the reflection bottom plate.
8. The high-isolation antenna for 5G mobile communication according to claim 1 or 4, wherein a power divider is further fixed at the bottom of the reflection bottom plate, and the power divider is connected with the die-cast antenna array through a coaxial transmission line; the power divider comprises two one-to-four power dividers and one-to-two power divider, and the one-to-four power divider and the one-to-two power divider are T-shaped microstrip power dividers.
9. The high isolation antenna for 5G mobile communication according to claim 1, wherein two N-type connectors are fixed on the lower surface of the reflecting bottom plate.
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| CN202110412042.6A CN113517561A (en) | 2021-04-16 | 2021-04-16 | High-isolation antenna for 5G mobile communication |
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| CN202110412042.6A CN113517561A (en) | 2021-04-16 | 2021-04-16 | High-isolation antenna for 5G mobile communication |
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| CN112582796A (en) * | 2020-11-30 | 2021-03-30 | 佛山市波谱达通信科技有限公司 | Shot-light antenna level (l) ing support and shot-light antenna |
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