CN113346225A - Broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair - Google Patents
Broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair Download PDFInfo
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- CN113346225A CN113346225A CN202110625895.8A CN202110625895A CN113346225A CN 113346225 A CN113346225 A CN 113346225A CN 202110625895 A CN202110625895 A CN 202110625895A CN 113346225 A CN113346225 A CN 113346225A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—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
- 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
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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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
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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
- H01Q15/24—Polarising devices; Polarisation filters
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
- H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements
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Abstract
The invention discloses a broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair, and relates to the technical field of antenna engineering. The invention mainly aims to solve the problems of narrow bandwidth, missing horizontal polarization and limited MIMO performance of the existing router antenna. The antenna pair is formed by combining two metal cavity antennas with openings on one side in a back-to-back mode, overall horizontal omnidirectional coverage is achieved, the metal cavity antennas radiate horizontal polarized waves, high isolation is kept between the two feed ports, and good MIMO performance is achieved. The antenna pair realizes broadband and miniaturization through methods of height shortening, semi-sealing of a radiation opening surface and the like. Therefore, the invention can be widely applied to equipment such as a wireless router supporting Wi-Fi 6E.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a broadband horizontal polarization horizontal omni-directional coverage MIMO (Multiple-Input Multiple-Output) antenna pair.
Background
With the development of wireless communication technology, wireless routers supporting Wi-Fi functions enter thousands of households, the Wi-Fi standard is continuously developed and updated, and the transmission rate is increasingly increased. However, as the number of intelligent devices needing to access a wireless network in a room is increased remarkably, the past Wi-Fi standard is under increasing pressure on channel capacity and communication rate. In recent years, Wi-Fi 6 and Wi-Fi 6E pass authentication successively, wherein a new 6GHz frequency band is added to the Wi-Fi 6E, so that the channel capacity can be remarkably improved, and the congestion problem of the traditional 2.4GHz and 5GHz frequency bands can be effectively relieved. And the addition of a new frequency band usually means the increase of the number of the router antennas, the attractiveness is reduced, and the production cost is obviously improved. In addition, the conventional wireless router antenna structure and size limitation determine that it is difficult to cover a wide frequency band of the 6GHz band. Therefore, in order to reduce the number of the router antennas and the production cost, it is necessary to design a small antenna capable of simultaneously covering 5GHz and 6GHz bands.
Conventional wireless router antennas include primarily monopole antennas, dipole antennas, and other antennas based on both variants. The limitations in the form and size of the antenna make it difficult to cover the newly added 6GHz band. The routers in the current market basically support the MIMO technology, and generally, the MIMO performance can be improved by increasing the number of antennas. However, for the above-mentioned vertically polarized antennas commonly used in the router antennas at present, it is difficult for two vertically polarized antennas to achieve high isolation under a short distance condition, so that in a limited space, increasing the number of antennas may cause deterioration of the isolation, and finally, may directly limit the improvement of the MIMO performance. In addition, the antenna structure determines that the electromagnetic waves transmitted and received by the antenna structure can only be vertically polarized, and people often hold and place the mobile phone in a nearly horizontal state in a real scene, and the electromagnetic waves transmitted and received by the mobile phone are horizontally polarized. The polarization mismatch between the router antenna and the mobile phone antenna can be solved only by polarization rotation when electromagnetic waves propagate in a rich scattering environment, and the communication speed and the transmission range of signals are sacrificed. In summary, the current router antenna still has the problems of limited bandwidth, polarization and MIMO technology. Therefore, a broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair is designed, which can better adapt to the broadband requirement of Wi-Fi 6E standard, can introduce horizontal polarization, improve the communication speed and range, and can place twice the number of antennas in the same original space, thereby obviously increasing the number of antennas and fully playing the advantages of new technology.
The antenna of the metal cavity has changeable shapes and more modes, and horizontal polarization is easy to realize. However, under the same working frequency, the size of the metal cavity antenna is obviously larger than that of a monopole antenna and a dipole antenna, so that the metal cavity antenna occupies more space when being used for a wireless router, limits the number of the total antennas, influences the overall attractiveness of a product, and reduces the working bandwidth of the antenna when reducing the size of the cavity. Therefore, under the requirement of a new standard for a wider bandwidth, designing a miniaturized cavity antenna capable of maintaining broadband performance is extremely demanded and challenging.
Disclosure of Invention
In order to overcome the defects of the existing wireless router antenna, adapt to the requirements of Wi-Fi 6E standard on the antenna and solve the problems of narrow bandwidth, missing horizontal polarization and limited MIMO performance of the existing router antenna, the invention aims to provide a broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair, which can simultaneously cover 5GHz and 6GHz frequency bands and has the characteristic of miniaturization.
In order to achieve the purpose, the invention adopts the technical scheme that:
a broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair is formed by combining a first metal cavity antenna and a second metal cavity antenna which are completely the same in a back-to-back symmetrical mode and is characterized in that radiation opening surfaces of the first metal cavity antenna and the second metal cavity antenna are respectively located on the opposite sides of a combining surface of the first metal cavity antenna and the second metal cavity antenna, and except the radiation opening surfaces, the other side surfaces of the first metal cavity antenna and the second metal cavity antenna are metal closed surfaces.
And the first metal cavity antenna and the second metal cavity antenna are combined into a common first metal sheet, and the first metal sheet and the second metal sheet are separated by the first metal sheet.
The radiation opening surface is semi-sealed by the metal sheet II to enhance cavity resonance, so that the antenna can realize broadband under the condition of small width, and the antenna can be transmitted forwards and backwards along the metal sheet when an electric field radiates outwards to enhance radiation in the front-back direction, and meanwhile, the lateral radiation performance is basically unchanged, and the range of 180 degrees of a horizontal plane is better covered.
The semi-seal is formed by extending a second metal sheet from two sides of the radiation opening surface to the middle, so that the size of the radiation opening surface is reduced.
And a horizontal metal column for antenna excitation is arranged through the first metal cavity antenna and the second metal cavity antenna so as to enable the cavity to generate a horizontal polarization electric field, and the metal column is a coaxial line inner conductor and is parallel to the plane where the radiation opening surface is located.
And the first metal cavity antenna and the second metal cavity antenna are provided with round holes for adjusting the impedance matching of the antennas on the surface where at least one end of the metal column is located, and the metal column and the round holes are concentric.
If a vertical connecting line of the combining surface and the radiation opening surface is taken as an x direction, the x direction is assumed to be horizontal, the horizontal direction perpendicular to the x direction is a y direction, the directions perpendicular to the x direction and the y direction are z directions, the maximum size of the first metal cavity antenna and the second metal cavity antenna in the x direction is width, the maximum size of the y direction is depth, the maximum size of the z direction is height, the width and the height respectively affect a basic mode and a tertiary mode of cavity resonance, the resonance frequency of the tertiary mode is reduced by reducing the height of the cavity, the primary mode is gradually close to the basic mode, and the broadband is realized.
The upper surface and the lower surface of the first metal cavity antenna and the second metal cavity antenna are sealed by the third metal sheet, so that electromagnetic wave radiation to the upper side and the lower side is effectively prevented, side-emitting gain is improved, and coupling between the two cavities is reduced.
The first metal cavity antenna and the second metal cavity antenna are cuboid, cylindrical or quadrangular, and the upper surface and the lower surface of the first metal cavity antenna and the second metal cavity antenna are of gradually-shrinking structures or are sealed without metal.
And the first metal cavity antenna and the second metal cavity antenna are filled with media.
The first metal cavity antenna and the second metal cavity antenna are made of metal-covered PCB boards.
Compared with the prior art, the single antenna pair can simultaneously cover 5GHz and 6GHz frequency bands of Wi-Fi 6E. The introduction of horizontal polarization can adapt to more communication scenes and improve the communication quality. Meanwhile, two antennas are designed in the space of the original single antenna to form an MIMO antenna pair, so that the appearance of the router is attractive, the number of the antennas can be increased remarkably, and the channel capacity is improved. In addition, the all-metal structure enables the antenna to be high in efficiency, low in cost and easy to process. Therefore, the broadband horizontal polarization horizontal omni-directional coverage MIMO antenna designed by the invention has a great number of advantages compared with the traditional router antenna, and has wider application prospect under the new standard Wi-Fi 6E of the wireless communication technology.
Drawings
Fig. 1 is a schematic diagram of an antenna pair structure.
FIG. 2 is a schematic diagram of the antenna pair of embodiment 1 in terms of millimeter (mm) structure and size
Fig. 3 is a plot of antenna versus S-parameter for example 1, where (a) is the plot of S11 versus half-seal sheet width, and (b) is the plot of antenna versus impedance matching and isolation for the final design.
Fig. 4 is the antenna versus horizontal plane pattern of example 1, where (a), (b), (c), and (d) correspond to 5.5GHz, 6GHz, 6.5GHz, and 7GHz, respectively.
Fig. 5 is a schematic structural diagram of a large-sized antenna pair according to embodiment 2.
Fig. 6 is a schematic structural diagram of an antenna pair based on a PCB board according to embodiment 3.
Fig. 7 is a schematic structural view (perspective view) of an antenna pair according to embodiment 4.
Fig. 8 is a schematic structural diagram (top view) of an antenna pair in embodiment 4.
Fig. 9 is a schematic structural diagram of a cylindrical antenna pair in embodiment 5.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, the present invention relates to a broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair, which is formed by combining a first metal cavity antenna 1 and a second metal cavity antenna 8 which are completely the same in a back-to-back manner, and the two antennas share a joint surface and are mirror-symmetrical along the joint surface to form a whole, i.e. an MIMO antenna pair. The term "back" refers to the radiation opening surfaces of the first metal cavity antenna 1 and the second metal cavity antenna 8 being on opposite sides, i.e. the radiation opening surfaces (i.e. the shaded area in fig. 1) of the two are on opposite sides of the junction surface.
For convenience of description, in the present invention, a vertical connection line between the bonding surface and the radiation port surface is defined as an x direction, and the x direction is assumed to be horizontal, a horizontal direction perpendicular to the x direction is a y direction, and a direction perpendicular to the x direction and the y direction is a z direction, so that upper and lower surfaces of the metal cavity antenna 1 and the metal cavity antenna two 8, that is, "two surfaces perpendicular to the z direction", and the remaining surfaces are defined as "side surfaces".
In the structure shown in fig. 1, the first metal cavity antenna 1 and the second metal cavity antenna 8 both adopt a rectangular parallelepiped shape, and five surfaces of the cavity are closed, but other shapes such as a cylinder or a quadrangular prism can be adopted, and the upper surface and the lower surface of the cavity can adopt a gradually-shrinking structure or have no metal closure. A medium can exist in the first metal cavity antenna 1 and the second metal cavity antenna 8, and the medium can be air or other medium. In a specific process, the first metal cavity antenna 1 and the second metal cavity antenna 8 can be both made of metal-covered PCB boards.
In the invention, the joint surface is the first metal sheet 5, and the first metal cavity antenna 1 and the second metal cavity antenna 8 are separated by the first metal sheet 5. The second metal sheet 2 can extend from two sides of the radiation opening surface to the middle to reduce the size of the radiation opening surface. And a y-direction metal post 6 is respectively arranged through the first metal cavity antenna 1 and the second metal cavity antenna 8, and the metal post 6 is a coaxial line inner conductor and is parallel to the plane where the radiation opening surface is positioned for antenna excitation so as to enable the cavity to generate a horizontal polarization electric field. The first metal cavity antenna 1 and the second metal cavity antenna 8 are provided with a round hole 7 used for adjusting impedance matching of the antennas on the surface where at least one end of the metal column 6 is located, and the metal column 6 is concentric with the round hole 7.
The maximum size in the x direction of the metal cavity antenna I1 and the maximum size in the y direction of the metal cavity antenna II 8 are used as the width, the maximum size in the y direction is used as the depth, the maximum size in the z direction is used as the height, the width and the height respectively influence the primary mode and the tertiary mode of cavity resonance, the height of the cavity is reduced, the resonance frequency of the tertiary mode can be obviously reduced, the tertiary mode is gradually close to the primary mode, and the broadband is realized. In addition, the upper and lower surfaces of the first metal cavity antenna 1 and the second metal cavity antenna 8 can be sealed by the third metal sheet 3, so that the radiation of electromagnetic waves to the upper side and the lower side is effectively prevented, the side-emitting gain is improved, and the coupling between the two antenna cavities is reduced.
In order to further reduce the size of the antenna, the width of the cavity is obviously narrowed, but when the cavity is not sealed, the resonance is poor under the required working frequency, the whole antenna mainly radiates with a metal column 6 monopole, the radiation opening surface of the invention is semi-sealed by the metal sheet II 2, the cavity resonance can be obviously enhanced, the bandwidth is expanded, the broadband of the antenna can be realized under the condition of smaller width, in addition, the arrangement of the metal sheet II 2 is more favorable for supporting a horizontal electric field on the opening surface, the electric field can be transmitted back and forth along the metal sheet II 2 when radiating outwards, the radiation in the front and back direction is enhanced, meanwhile, the lateral radiation performance is basically kept unchanged, and the range of 180 degrees on the horizontal plane is better covered. The semi-closed design plays an important role in expanding bandwidth and horizontal plane coverage.
Therefore, the MIMO antenna is directly combined with two cavity antennas which have the size far smaller than that of the two cavity antennas with the same frequency, the widths of the two cavity antennas are not narrowed, and the two cavity antennas are not semi-sealed. The two feeding ports have high isolation. The invention realizes broadband and miniaturization by methods of height shortening, radiation opening surface half-sealing and the like, and the obtained MIMO antenna pair has the characteristics of horizontal polarization and horizontal omnidirectional coverage, can obviously improve the communication performance when used for a wireless router, and can be widely applied to equipment such as a wireless router supporting Wi-Fi 6E.
The following are several specific embodiments of the present invention.
Example 1
The whole structure of the antenna pair is shown in fig. 2, and the antenna pair is composed of two identical metal cavity antennas, the middle of the antenna pair is separated by a metal sheet, and the radiation port faces shown by two side shadows radiate outwards. The dimensions of the antenna pair in the x, y and z directions are 10.6 mm, 12.9 mm and 60 mm, respectively. The antenna of the present embodiment is an air medium, but other media may be used instead. The middle metal cylinder is a coaxial line inner conductor, the radius is 0.6 mm, and the two antennas are excited by the point, work in a basic mode and a third mode and radiate outwards through openings on two sides. The metal column is opposite to a round hole with the radius of 1.7 mm for adjusting impedance matching, and the metal column and the round hole are concentric. The radiation opening surface is provided with a second metal sheet for partially sealing, the second metal sheet is used for reinforcing a cavity resonance mode and increasing the bandwidth of the antenna, as can be seen from (a) in fig. 3, the second metal sheet is widened, the radiation opening surface is reduced, the bandwidth of the antenna is gradually increased, the size of the second metal sheet finally selected by the design is 3.3 mm, and the corresponding opening width is 4 mm, as shown by shading in the figure. The isolation between the two antenna ports is as shown in fig. 3 (b), and reaches more than-19 dB in the whole bandwidth. The radiation pattern of the antenna is shown in fig. 4, and it can be seen from (a), (b), (c) and (d) in fig. 4 that, under the same frequency, two antennas respectively cover 180 degrees of horizontal plane, and the two antennas combine to realize the omnidirectional coverage of the horizontal plane, thereby having better MIMO performance.
Example 2
The overall structure of the antenna pair is shown in figure 5. The antenna is formed by combining two identical metal cavity antennas with the side walls removed back to back, the two antennas radiate outwards from radiation ports shown by two side shadows respectively, and the feeding mode is the same as that of the embodiment 1. Compared with the embodiment 1, the whole width of the antenna pair is obviously widened, the cavity can excite the primary mode and the tertiary mode under the condition of no semi-sealed metal sheet II 2, and the working bandwidth of the antenna is ensured. Compared with the embodiment 1, the size of the antenna pair is sacrificed, but the antenna pair still has the characteristics of horizontal polarization and horizontal omnidirectional coverage, and the two ports still have higher isolation.
Example 3
The overall structure of the antenna pair is shown in figure 6. The metal sheet four 4 is a PCB board, the antenna uses a microstrip line for feeding, and other metal sheets can be replaced by the PCB board. The two metal cavity antennas radiate outwards from the radiation port surfaces shown by the shadows on the two sides respectively, the radiation port surfaces still have the characteristic of semi-sealing, the cavity resonance mode can be obviously enhanced under the condition that the width of the antenna is narrow, and the bandwidth of the antenna is increased. The antenna of the embodiment is also horizontally polarized to the radiated electromagnetic waves, two ports can keep high isolation, and a directional diagram can also realize horizontal omnidirectional coverage.
Example 4
The overall structure of the antenna pair is shown in fig. 7 and 8. The third metal sheet 3 of the antenna is replaced by a gradually-contracted pyramid, and the radiation opening surface is also extended towards the two tips. The pyramid-shaped gradually-shrinking structure can also reduce the third-order mode resonance frequency of the cavity, prevent electromagnetic waves from radiating to the upper side and the lower side of the cavity, and weaken the coupling between the two cavities. The semi-sealed radiation opening surface can also enhance the cavity resonance mode and increase the antenna bandwidth. The horizontally polarized electromagnetic wave is radiated outwards from the radiation port of the semi-seal shown by the shadow, and the directional diagrams of the two antennas cover the horizontal omnidirectional direction together. The two ports of the antenna can keep high isolation degree, and the MIMO performance is good.
Example 5
The overall structure of the antenna pair is shown in figure 9. The single antenna is in a semi-cylindrical structure and is opened at the side of the circular arc, the two antennas are combined to form a complete cylinder, and the middle of the complete cylinder is separated by a first metal sheet 5. The curved characteristic of circular arc makes the radiation oral area that the shadow shows have the characteristics similar to from both sides half seal, can strengthen the cavity resonance, expands the working bandwidth. The antenna radiates horizontally polarized electromagnetic waves, the whole antenna pair can realize horizontal omnidirectional coverage, and the ports of the two antennas can also keep higher isolation.
Claims (10)
1. A broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair is formed by combining a first metal cavity antenna (1) and a second metal cavity antenna (8) which are completely the same in a back-to-back symmetrical mode and is characterized in that radiation opening surfaces of the first metal cavity antenna (1) and the second metal cavity antenna (8) are respectively located on the opposite sides of a combining surface of the first metal cavity antenna and the second metal cavity antenna, and except the radiation opening surfaces, the other side surfaces of the first metal cavity antenna and the second metal cavity antenna are metal closed surfaces.
2. The pair of broadband horizontally-polarized horizontally-omni-directional coverage MIMO antennas according to claim 1, wherein the joint surface of the first metal cavity antenna (1) and the second metal cavity antenna (8) is a common first metal sheet (5), and the first metal sheet (5) and the second metal cavity antenna are separated.
3. The pair of wideband horizontally polarized horizontally omni-directional coverage MIMO antennas of claim 1, wherein the radiating aperture is half-sealed with the second metal sheet (2) to enhance the cavity resonance, and enable the electric field to propagate forward and backward along the second metal sheet (2) when radiating outward, thereby enhancing the radiation in the forward and backward directions, and simultaneously keeping the broadside performance substantially unchanged, so as to better cover the 180-degree range of the horizontal plane.
4. The pair of wideband horizontally polarized horizontally omni-directional coverage MIMO antennas of claim 3, wherein the semi-seal is a second metal sheet (2) extending from both sides of the radiation aperture face to the middle to reduce the size of the radiation aperture face.
5. The pair of broadband horizontally-polarized horizontally-omni-directional coverage MIMO antennas according to claim 1, wherein a horizontal metal post (6) for antenna excitation is disposed through the first metal cavity antenna (1) and the second metal cavity antenna (8) so that the cavity generates a horizontally-polarized electric field, and the metal post (6) is a coaxial inner conductor and is parallel to a plane where the radiation opening surface is located.
6. The pair of broadband horizontally-polarized horizontally-omni-directional coverage MIMO antennas according to claim 5, wherein the first metal cavity antenna (1) and the second metal cavity antenna (8) are provided with a circular hole (7) for adjusting the impedance matching of the antennas on the surface where at least one end of the metal column (6) is located, and the metal column (6) is concentric with the circular hole (7).
7. The pair of broadband horizontally polarized horizontally omni-directional coverage MIMO antennas according to claim 1, wherein a vertical connection line between the combining surface and the radiation port surface is an x direction, the x direction is horizontal, a horizontal direction perpendicular to the x direction is a y direction, and directions perpendicular to the x direction and the y direction are z directions, a maximum dimension of the first metal cavity antenna (1) and the second metal cavity antenna (8) in the x direction is a width, a maximum dimension of the y direction is a depth, a maximum dimension of the z direction is a height, and the width and the height respectively affect a fundamental mode and a tertiary mode of cavity resonance, and the resonant frequency of the tertiary mode is reduced by reducing the height of the cavity to gradually approach the fundamental mode, thereby realizing broadband.
8. The pair of wideband horizontally-polarized horizontally-omni-directional coverage MIMO antennas according to claim 1, wherein the upper and lower surfaces of the first metal cavity antenna (1) and the second metal cavity antenna (8) are both sealed by the third metal sheet (3), so as to effectively prevent electromagnetic waves from radiating to the upper and lower sides, improve lateral radiation gain, and reduce coupling between the two cavities.
9. The pair of broadband horizontally-polarized horizontally-omni-directional coverage MIMO antennas according to claim 1, wherein the first metal cavity antenna (1) and the second metal cavity antenna (8) are rectangular, cylindrical or quadrangular, and the upper and lower surfaces thereof are tapered structures or are closed without metal.
10. The pair of wideband horizontally polarized horizontally omni-directional coverage MIMO antennas of claim 1, wherein the first metal cavity antenna (1) and the second metal cavity antenna (8) are made of metal-clad PCB boards.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625895.8A CN113346225A (en) | 2021-06-04 | 2021-06-04 | Broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625895.8A CN113346225A (en) | 2021-06-04 | 2021-06-04 | Broadband horizontal polarization horizontal omni-directional coverage MIMO antenna pair |
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| CN113346225A true CN113346225A (en) | 2021-09-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100090924A1 (en) * | 2008-10-10 | 2010-04-15 | Lhc2 Inc | Spiraling Surface Antenna |
| WO2011157172A2 (en) * | 2011-06-03 | 2011-12-22 | 华为技术有限公司 | Omni-directional antenna |
| US20130249756A1 (en) * | 2012-03-23 | 2013-09-26 | Lhc2 Inc | Multi-Slot Common Aperture Dual Polarized Omni-Directional Antenna |
| CN110112547A (en) * | 2019-05-05 | 2019-08-09 | 华南理工大学 | A kind of wideband dual polarized omnidirectional antenna of 5G high-isolation |
-
2021
- 2021-06-04 CN CN202110625895.8A patent/CN113346225A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100090924A1 (en) * | 2008-10-10 | 2010-04-15 | Lhc2 Inc | Spiraling Surface Antenna |
| WO2011157172A2 (en) * | 2011-06-03 | 2011-12-22 | 华为技术有限公司 | Omni-directional antenna |
| US20130249756A1 (en) * | 2012-03-23 | 2013-09-26 | Lhc2 Inc | Multi-Slot Common Aperture Dual Polarized Omni-Directional Antenna |
| CN110112547A (en) * | 2019-05-05 | 2019-08-09 | 华南理工大学 | A kind of wideband dual polarized omnidirectional antenna of 5G high-isolation |
Non-Patent Citations (1)
| Title |
|---|
| PEIQIN LIU ET AL.: "Horizontally Polarized Omnidirectional Antenna Using Open-ended Cavity", 《IEEE》 * |
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