CN106961016B - Four-unit MIMO antenna with different polarization and directional patterns - Google Patents
Four-unit MIMO antenna with different polarization and directional patterns Download PDFInfo
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- CN106961016B CN106961016B CN201710316242.5A CN201710316242A CN106961016B CN 106961016 B CN106961016 B CN 106961016B CN 201710316242 A CN201710316242 A CN 201710316242A CN 106961016 B CN106961016 B CN 106961016B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
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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
-
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0075—Stripline fed arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a four-unit MIMO antenna with different polarization and patterns, which comprises a dielectric substrate, a floor printed on the back of the dielectric substrate, an MIMO antenna printed on the front of the dielectric substrate and isolation strips; the MIMO antenna is formed by rotationally arranging four identical antenna units at the center of 90 degrees; the isolation strip is vertically erected above the dielectric substrate, and the center of the isolation strip coincides with the center of the MIMO antenna. The MIMO antenna is formed by arranging four identical antenna units in a 90-degree center rotation mode, and the area of the antenna is reduced by half compared with that of a traditional half-wavelength patch antenna by adopting a method of loading patch short-circuit metal columns, so that the structure is compact; the microstrip printing technology is used, so that the antenna is higher in integration degree, lighter in weight, lower in cost and shorter in processing period; by using vertical spacer bars, the correlation coefficient between antenna ports is reduced, and the structure is more compact on the basis of ensuring high isolation effect compared with other decoupling techniques.
Description
Technical Field
The invention relates to the technical field of microwave millimeter wave passive devices, in particular to a four-unit MIMO antenna with different polarizations and patterns.
Background
With the rapid development of modern communication systems, the requirements of people on data transmission rates between devices are higher and higher, and meanwhile, in order to adapt to the commercialization requirements of microwave millimeter wave circuits, the communication devices also have to have the characteristics of miniaturization, light weight and low cost. The multiband miniature MIMO (multi-Input multi-Out-put) antenna is a compact and low-cost antenna generated under such a situation. MIMO antennas can increase channel capacity by using multi-antenna techniques, thereby effectively increasing the data transmission rate of the system.
However, the space left for antenna design is very limited due to the demand for miniaturization of communication devices. Placing multiple antennas close together can effectively reduce the size of the overall antenna system, but the mutual coupling between the antennas in a limited space is strong, and the correlation coefficient between the antennas is high, so that the diversity performance of the MIMO antenna is drastically deteriorated. The existing decoupling technology in the miniaturized multi-antenna design has various types, such as utilizing a defected ground structure, introducing an electromagnetic band gap structure, decoupling a matching network, utilizing a mushroom cloud structure and the like, but the technologies have certain defects, such as defected ground can damage a floor structure, the application range of the antenna is limited, and the occupied space of the antenna is increased by the three methods, so that the technology is not suitable for the miniaturized design. Furthermore, these techniques are mostly designed for decoupling of two antennas, and for decoupling of multiple antennas or multiple frequency bands, practical implementation becomes more complicated. Therefore, there are many problems to be solved in the design of miniaturized MIMO antennas with high isolation.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a four-unit MIMO antenna with different polarizations and patterns so as to overcome the defects of low design isolation, heavy weight, large volume, high processing cost and difficult integration of the conventional MIMO antenna.
Therefore, the invention provides a four-unit MIMO antenna with different polarization and patterns, which comprises a dielectric substrate, a floor printed on the back of the dielectric substrate, an MIMO antenna printed on the front of the dielectric substrate and isolation strips; the MIMO antenna is formed by rotationally arranging four identical antenna units at the center of 90 degrees; the isolation strip is vertically erected above the dielectric substrate, and the center of the isolation strip coincides with the center of the MIMO antenna.
Further, each antenna unit structure consists of a feed microstrip line, a symmetrical matching groove, a radiation metal patch, a loading L-shaped gap and a patch short circuit metal column; the feed microstrip line is inserted into the radiating metal patch from the side face to form symmetrical matching grooves; the patch short-circuit metal posts are positioned at two sides of the symmetrical matching groove; the loading L-shaped slot is positioned on the radiating metal patch, one side of the loading L-shaped slot is close to the patch short-circuit metal column and parallel to the feed microstrip line, and the other side of the loading L-shaped slot is far away from the patch short-circuit metal column and perpendicular to the feed microstrip line.
Further, the isolation strip consists of a cross-shaped metal strip, a cross-shaped metal microstrip line printed on the surface of the medium substrate and a short circuit metallization through hole; the cross metal strip is connected with the floor through a cross metal microstrip line and a short circuit metallization through hole.
Compared with the prior art, the invention has the following beneficial effects:
1. the structure is compact, the MIMO antenna is formed by arranging four identical antenna units in a 90-degree center rotation way, and the area of the antenna is reduced by half compared with the area of a traditional half-wavelength patch antenna by adopting a method of loading a patch short-circuit metal column;
2. the microstrip printing technology is used, so that the antenna is higher in integration degree, lighter in weight, lower in cost and shorter in processing period;
3. by using the vertical isolation strip, the correlation coefficient between the antenna ports is reduced, and compared with other decoupling technologies, the structure is more compact on the basis of ensuring high isolation effect;
4. the L-shaped slot loading method is adopted, so that the original miniaturized antenna is additionally provided with a working frequency band, the dual-band antenna has the characteristics of dual frequency bands, good working performance can be ensured in both frequency bands, and the two frequency bands can reach a good matching state simultaneously by adjusting the length of the matching groove.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a four-element MIMO antenna with different polarizations and patterns according to the present invention, wherein:
a dielectric substrate 1, a floor 2, a MIMO antenna 3 and a spacer 4;
the feed microstrip line 31, the symmetrical matching groove 32, the radiating metal patch 33, the loading L-shaped slot 34 and the patch short circuit metal column 35;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the present embodiment provides a four-unit MIMO antenna with different polarizations and patterns, which includes a dielectric substrate 1, a floor board 2 printed on the back surface of the dielectric substrate 1, a MIMO antenna 3 printed on the front surface of the dielectric substrate 1, and a spacer 4; the MIMO antenna 3 is formed by arranging four identical antenna units in a 90-degree rotation mode; the isolation strip 4 is vertically arranged above the dielectric substrate 1, and the center of the isolation strip is coincident with the center of the MIMO antenna 3.
Each antenna unit structure consists of a feed microstrip line 31, a symmetrical matching groove 32, a radiation metal patch 33, a loading L-shaped gap 34 and a patch short-circuit metal column 35, wherein the loading L-shaped gap 34 is close to the outermost edge of the MIMO antenna 3 and a cross-shaped metal strip 41, and the length of the loading L-shaped gap 34 can be changed according to the required frequency.
The feed microstrip line 31 is inserted into the radiating metal patch 33 from the side to form a symmetrical matching slot 32; the patch short circuit metal posts 35 are located on both sides of the symmetrical matching groove 32; the loading L-shaped slit 34 is located on the radiating metal patch 33, one side is close to the patch short-circuit metal column 35, parallel to the feeding microstrip line 31, and the other side is far from the patch short-circuit metal column 35, perpendicular to the feeding microstrip line 31.
The isolation strip 4 consists of a cross-shaped metal strip 41, a cross-shaped metal microstrip line 42 printed on the surface of the medium substrate 1 and a short circuit metallization through hole 43; the cross-shaped metal strip 41 is connected to the floor 2 by a cross-shaped metal microstrip line 42 and a short-circuit metallized via 43.
The working principle is as follows: the MIMO antenna 3 is formed by arranging four identical antenna units in a 90-degree rotation way, and linear polarization in four directions of 0 degree, 90 degrees, 180 degrees and 270 degrees is realized; by loading the patch short-circuit metal posts 35, the antenna size is reduced by half compared with the traditional half-wavelength patch antenna, thereby achieving the purpose of miniaturization; the antenna has the characteristic of double frequency bands by loading the L-shaped gap 34 on the antenna unit, and the impedance matching of the two frequency bands can be matched simultaneously by adjusting the length of the symmetrical matching groove 32; in the isolation strip 4, the cross-shaped metal strip 41 is connected with the floor 2 through the cross-shaped metal microstrip line 42 and the short circuit metallization through hole 43, port isolation in two frequency bands is effectively reduced through reflection action of the isolation strip 4, and meanwhile, the maximum radiation direction of the directional diagram is deviated from the normal direction of the plane of the substrate by 30 degrees.
To further illustrate the feasibility of the above technical solution, a specific design example is given below, and a four-element MIMO antenna with different polarizations and patterns, where the overall MIMO antenna system has dimensions as follows: the dielectric substrate of the printed antenna was F4B having a thickness of 1.96mm, a relative permittivity of 2.55 and a loss tangent of 0.002. The radiation piece size of single antenna element is 12mm x 12mm, and feeder total length is 9.7mm, and L loading gap total length is 18.5mm, and the paster edge distance is 2mm, in the parting bead, replaces cross metal strip by the strap of printing on the base plate both sides, and cross base plate adopts the F4B of thickness 0.8mm, and the parting bead height is 2mm, length 26mm. The test results show that the two operating frequency bands of the antenna are: 3.471GHz-3.529GHz and 5.678GHz-5.721GHz, peak gain ranges from 2.65dBi to 2.85dBi, peak efficiency in the low frequency band is 63% and peak efficiency in the high frequency band is 65%; the isolation in the low frequency band is greater than 18.4dB and the isolation in the high frequency band is greater than 22.7dB.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (2)
1. The four-unit MIMO antenna with different polarization and directional patterns is characterized by comprising a dielectric substrate, a floor printed on the back surface of the dielectric substrate, an MIMO antenna printed on the front surface of the dielectric substrate and isolation strips; the MIMO antenna is formed by rotationally arranging four identical antenna units at the center of 90 degrees; the isolation strip is vertically arranged above the dielectric substrate, and the center of the isolation strip is overlapped with the center of the MIMO antenna; each antenna unit consists of a feed microstrip line, a symmetrical matching groove, a radiation metal patch, a loading L-shaped gap and a patch short circuit metal column; the feed microstrip line is inserted into the radiating metal patch from the side face to form symmetrical matching grooves; the patch short-circuit metal posts are positioned at two sides of the symmetrical matching groove; the loading L-shaped slot is positioned on the radiating metal patch, one side of the loading L-shaped slot is close to the patch short-circuit metal column and parallel to the feed microstrip line, and the other side of the loading L-shaped slot is far away from the patch short-circuit metal column and perpendicular to the feed microstrip line.
2. The four-unit MIMO antenna with different polarizations and patterns according to claim 1, wherein the isolation strip consists of a cross-shaped metal strip, a cross-shaped metal microstrip line printed on the surface of a dielectric substrate and a short circuit metallization through hole; the cross metal strip is connected with the floor through a cross metal microstrip line and a short circuit metallization through hole.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316242.5A CN106961016B (en) | 2017-05-08 | 2017-05-08 | Four-unit MIMO antenna with different polarization and directional patterns |
| RU2018131077U RU187412U1 (en) | 2017-05-08 | 2017-07-03 | FOUR ELEMENT MIMO ANTENNA WITH VARIOUS POLARIZATION STATES AND DIRECTION DIAGRAMS |
| PCT/CN2017/091441 WO2018205393A1 (en) | 2017-05-08 | 2017-07-03 | Four-element mimo antenna with different polarizations and directional patterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316242.5A CN106961016B (en) | 2017-05-08 | 2017-05-08 | Four-unit MIMO antenna with different polarization and directional patterns |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106961016A CN106961016A (en) | 2017-07-18 |
| CN106961016B true CN106961016B (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710316242.5A Active CN106961016B (en) | 2017-05-08 | 2017-05-08 | Four-unit MIMO antenna with different polarization and directional patterns |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN106961016B (en) |
| RU (1) | RU187412U1 (en) |
| WO (1) | WO2018205393A1 (en) |
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| MX2020014284A (en) * | 2018-06-27 | 2021-05-27 | Amphenol Antenna Solutions Inc | Quad-port radiating element. |
| CN108987947B (en) * | 2018-06-27 | 2024-04-16 | 广东通宇通讯股份有限公司 | 3D-MID technology array antenna |
| RU2725130C2 (en) * | 2018-06-29 | 2020-06-29 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский автомобильно-дорожный государственный технический университет (МАДИ)" | Method for wireless transmission and reception of data |
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| CN113131975A (en) * | 2019-12-31 | 2021-07-16 | 中兴通讯股份有限公司 | Antenna array decoupling method, device, system and storage medium |
| CN112164890B (en) * | 2020-08-31 | 2023-05-09 | 西安朗普达通信科技有限公司 | Stacked decoupling network |
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| CN114696081B (en) * | 2022-04-08 | 2023-10-10 | 苏州迈斯维通信技术有限公司 | Multi-order resonant high-isolation broadband cavity array antenna system |
| CN114597647B (en) * | 2022-04-11 | 2023-08-11 | 成都空间矩阵科技有限公司 | 1bit reconfigurable transmission array unit |
| CN114843762B (en) * | 2022-04-20 | 2023-05-16 | 电子科技大学 | MIMO antenna with reconfigurable frequency |
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- 2017-05-08 CN CN201710316242.5A patent/CN106961016B/en active Active
- 2017-07-03 WO PCT/CN2017/091441 patent/WO2018205393A1/en active Application Filing
- 2017-07-03 RU RU2018131077U patent/RU187412U1/en active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106961016A (en) | 2017-07-18 |
| RU187412U1 (en) | 2019-03-05 |
| WO2018205393A1 (en) | 2018-11-15 |
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