CN116864985B - MIMO antenna - Google Patents
MIMO antenna Download PDFInfo
- Publication number
- CN116864985B CN116864985B CN202310748686.1A CN202310748686A CN116864985B CN 116864985 B CN116864985 B CN 116864985B CN 202310748686 A CN202310748686 A CN 202310748686A CN 116864985 B CN116864985 B CN 116864985B
- Authority
- CN
- China
- Prior art keywords
- antenna
- clearance area
- grounding plate
- lead
- excitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005284 excitation Effects 0.000 claims abstract description 28
- 230000001939 inductive effect Effects 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 5
- 230000005684 electric field Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Details Of Aerials (AREA)
Abstract
The invention relates to the technical field of microwave communication, and discloses a MIMO antenna, which comprises: including symmetry setting up first antenna and second antenna on the ground plate, and first antenna and second antenna structure are the same, and first antenna and second antenna all include: the first clearance area is a side opening of the grounding plate; the excitation structure I is arranged in the clearance area I and used for controlling the impedance matching of the antenna; the first resonance structure is arranged in the clearance area I and is connected with the first excitation structure and the clearance area I, and the first resonance structure, the first excitation structure and the clearance area I form an annular excitation structure; and a T-shaped decoupling structure is arranged on the outer side of the grounding plate and positioned between the first antenna and the second antenna and used for decoupling the first antenna from the second antenna. The invention can solve the problem of low isolation of two antennas in a limited space in the existing MIMO antenna, and the distance between two excitation units is very close, thereby improving the integration level of the antenna device.
Description
Technical Field
The invention relates to the technical field of microwave communication, in particular to a MIMO antenna.
Background
Antennas have become an integral device in various wireless devices for transmitting and receiving electromagnetic wave signals. The multi-antenna technology can greatly improve the wireless transmission rate, and is widely used in the scenes of fourth-generation mobile communication, fifth-generation communication systems, everything interconnection and the like. To ensure excellent antenna characteristics, high isolation or low coupling between antennas must be achieved.
While MIMO technology is continuously developed, restrictions and requirements put forward by various application scenarios are increasing. Of these, the most critical is the contradiction between the multiplication of the number of antennas and the reduction of the space reserved for the antenna arrangement. Multiple antenna elements are arranged in a limited space, so that strong mutual coupling effect is easy to generate, and the performance of the antenna elements is influenced. Therefore, how to design a MIMO antenna that meets performance requirements quickly and efficiently in a limited space is a very research-wise and valuable task.
Disclosure of Invention
The embodiment of the invention provides a MIMO antenna, which aims to solve the problem that in the prior art, the isolation of two antennas in a limited space is low.
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to an embodiment of the present invention, there is provided a MIMO antenna.
In one embodiment, the MIMO antenna comprises: comprises a first antenna and a second antenna which are symmetrically arranged on a grounding plate, wherein the structures of the first antenna and the second antenna are the same,
The first antenna and the second antenna each include: the first clearance area is an opening at the side edge of the grounding plate; the excitation structure I is arranged in the clearance area I and used for controlling the impedance matching of the antenna; the first resonance structure is arranged in the clearance area I and connected with the first excitation structure and the clearance area I, and the first resonance structure, the first excitation structure and the clearance area I form an annular excitation structure;
And a T-shaped decoupling structure is arranged on the outer side of the grounding plate and positioned between the first antenna and the second antenna and used for decoupling the first antenna from the second antenna.
In one embodiment, the excitation structure one comprises a feed and a wire one, wherein two ends of the wire one are respectively connected with the feed and the resonance structure, and the feed is connected with the grounding plate.
In one embodiment, the excitation structure one further includes n components, n is an integer greater than or equal to 1, and the components are connected to the middle of the wire one, and the components are wires, inductance elements or capacitance elements.
In one embodiment, in the case where n is greater than or equal to 2, n components are connected in series to the middle of the first wire.
In one embodiment, the first resonant structure includes a second conductive wire, and two ends of the second conductive wire are connected to the ground plate.
In one embodiment, the first resonant structure further includes m capacitive elements, where m is an integer greater than or equal to 1, and the capacitive elements are connected to a middle portion of the second conductive wire.
In one embodiment, in the case where m is greater than or equal to 2, m capacitive elements are connected in series in the middle of the second wire.
In one embodiment, the T-shaped decoupling structure comprises: the second clearance area is positioned at the outer side of the grounding plate; and the third lead is positioned in the clearance area II, connected with the grounding plate, connected with the third lead and formed into a T-shaped structure with the third lead.
In one embodiment, the T-shaped decoupling structure further includes h inductive elements, h is an integer greater than or equal to 1, and the inductive elements are connected to the middle of the third wire.
In one embodiment, in the case where h is greater than or equal to 2, h inductance elements are connected in series in the middle of the third wire.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
The invention can solve the problem of low isolation of two antennas in a limited space in the existing MIMO antenna, and the distance between two excitation units is very close, thereby improving the integration level of the antenna device.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of a MIMO antenna according to an exemplary embodiment;
Fig. 2 is a schematic diagram ii of a MIMO antenna according to an exemplary embodiment;
fig. 3 is an S-parameter diagram of a MIMO antenna according to an exemplary embodiment.
In the figure:
1. A ground plate; 2. a first antenna; 3. a second antenna; 4. a first clearance area; 5. feeding electricity; 6. a first conducting wire; 7. a component; 8. a second conducting wire; 9. a capacitive element; 10. a second clearance area; 11. a third conducting wire; 12. a fourth wire; 13. an inductance element.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in, or substituted for, those of others. The scope of the embodiments herein includes the full scope of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like herein are used merely to distinguish one element from another element and do not require or imply any actual relationship or order between the elements. Indeed the first element could also be termed a second element and vice versa. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a structure, apparatus or device that comprises the element. Various embodiments are described herein in a progressive manner, each embodiment focusing on differences from other embodiments, and identical and similar parts between the various embodiments are sufficient to be seen with each other.
The terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein refer to an orientation or positional relationship based on that shown in the drawings, merely for ease of description herein and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus are not to be construed as limiting the invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanically or electrically coupled, may be in communication with each other within two elements, may be directly coupled, or may be indirectly coupled through an intermediary, as would be apparent to one of ordinary skill in the art.
Herein, unless otherwise indicated, the term "plurality" means two or more.
Herein, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
Herein, the term "and/or" is an association relation describing an object, meaning that three relations may exist. For example, a and/or B, represent: a or B, or, A and B.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Fig. 1 shows an embodiment of a MIMO antenna of the present invention.
In this alternative embodiment, the MIMO antenna includes: including symmetry set up first antenna 2 and second antenna 3 on ground plate 1, just first antenna 2 with second antenna 3 structure is the same, wherein, first antenna 2 with second antenna 3 all includes: the first clearance area 4 is a side opening of the grounding plate 3; the excitation structure I is arranged in the clearance area I4 and used for controlling the impedance matching of the antenna; the first resonance structure is arranged in the clearance area I4 and is connected with the first excitation structure and the clearance area I4, and the first resonance structure, the first excitation structure and the clearance area I4 form an annular excitation structure; a T-shaped decoupling structure is arranged outside the ground plate 1 and between the first antenna 2 and the second antenna 3, so as to decouple the first antenna 2 from the second antenna 3.
As further shown in fig. 1, in this alternative embodiment, the excitation structure one includes a feed 5 and a wire one6, wherein two ends of the wire one6 are respectively connected to the feed 5 and the resonance structure, and the feed 5 is connected to the ground plate 1. The excitation structure I further comprises n components 7, n is an integer greater than or equal to 1, the components 7 are connected to the middle of the lead I, and n components 7 are connected in series to the middle of the lead I6 under the condition that n is greater than or equal to 2.
For the first antenna and the second antenna, the component 7 is used for controlling impedance matching of the antennas, where the component 7 may be a wire, an inductance element or a capacitance element, or any combination of a wire, an inductance element and a capacitance element. Of course, in practical application, the component 7 may not be configured, and only the feeding 5 and the first wire 6 may form an excitation structure.
As further shown in fig. 1, in this alternative embodiment, the first resonant structure includes a second conductive wire 8, and two ends of the second conductive wire 8 are connected to the ground plate 1. The first resonant structure further includes m capacitive elements 9,m that are integers greater than or equal to 1, and the capacitive element 9 is connected to the middle portion of the second conductive wire 8, where m is greater than or equal to 2, and the m capacitive elements 9 are connected in series to the middle portion of the second conductive wire 8.
For the first antenna and the second antenna, the capacitive element 9 is used to control the resonant frequency of the antenna, and the capacitive element 9 has a capacitive component, and may be a lumped element, such as a chip capacitor, a varactor diode, a transistor, or the like, or a distributed element, such as a parallel wire, a transmission line, or the like. Instead of a capacitive element, a combination of elements may be used to obtain a certain capacitance, for example, the capacitive element 9 may be replaced by a combination of capacitive and inductive elements.
As further shown in fig. 1, in this alternative embodiment, the decoupling structure comprises: a second clearance area 10 is positioned outside the grounding plate 1; and a third wire 11 is positioned in the clearance area II 10 and connected with the grounding plate 1, and a fourth wire 12 is connected with the third wire 11 and forms a T-shaped structure with the third wire 11. The decoupling structure further comprises h inductance elements 13, h is an integer greater than or equal to 1, and the inductance elements 13 are connected to the middle of the third conductive wire 11. In the case where h is 2 or more, h inductance elements 13 are connected in series to the middle of the third wire 11.
In practical application, the inductance value of the inductance element 13 or the length of the fourth wire 12 is adjusted to control the resonance frequency of the decoupling structure. The inductance element 13 has an inductance component, and may be a lumped element such as a chip inductor, a chip resistor, or the like, or a distributed element such as a wire, a coil, or the like.
Fig. 2 shows another embodiment of a MIMO antenna according to the present invention, in which the layout of the antenna and the decoupling structure is identical to the embodiment shown in fig. 1, and the excitation structures of the two antennas are ring structures belonging to a magneto-rheological ring (Megnetic current) which is arranged at the position where the half-wave mode magnetic field on the long side of the ground plate is strongest, so that the half-wave mode of the antenna is sufficiently excited, and the other antenna modes are not excited; the decoupling structure adopts a T-shaped structure, the T-shaped structure belongs to a current probe (Electric probe), the current probe is arranged at the position with the strongest Electric field of the full wave mode on the long side of the grounding plate, the full wave mode on the long side of the grounding plate is fully excited, and the excitation structure and the decoupling structure of the antenna excite different modes respectively, so that the decoupling structure has smaller influence on the antenna performance.
Fig. 3 shows an S-parameter diagram of the MIMO antenna of the present invention. As can be seen from fig. 3, the curves 3a and 3b are the reflection coefficients generated by the first antenna and the second antenna, respectively, and the curve 3c represents the isolation between the two antennas, which can reach more than 15dB, which indicates that the isolation is maintained high although the distance between the two antennas is very close, and the added decoupling structure does not deteriorate the S parameters of the two antennas.
The present invention is not limited to the structure that has been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (5)
1. A MIMO antenna is characterized by comprising a first antenna and a second antenna which are symmetrically arranged on a grounding plate, wherein the first antenna and the second antenna have the same structure, and the first antenna and the second antenna are arranged on the same structure,
The first antenna and the second antenna each include: the first clearance area is an opening at the side edge of the grounding plate; the excitation structure I is arranged in the clearance area I and used for controlling the impedance matching of the antenna; the first resonance structure is arranged in the clearance area I and connected with the first excitation structure and the clearance area I, and the first resonance structure, the first excitation structure and the clearance area I form an annular excitation structure; the annular excitation structure belongs to a magnetic ring, and the magnetic ring is arranged at the position with the strongest half-wave mode magnetic field on the long side of the grounding plate, so that the half-wave mode of the antenna is fully excited, and other antenna modes cannot be excited;
A T-shaped decoupling structure is arranged on the outer side of the grounding plate and positioned between the first antenna and the second antenna and used for decoupling the first antenna from the second antenna, the T-shaped decoupling structure belongs to a current probe, and the current probe is arranged at the position with the strongest electric field of the full-wave mode of the long side of the grounding plate so as to fully excite the full-wave mode of the long side of the grounding plate;
The excitation structure I comprises a feed and a lead I, wherein two ends of the lead I are respectively connected with the feed and the resonance structure, and the feed is connected with the grounding plate; the excitation structure I further comprises n components, n is an integer greater than or equal to 1, the components are connected to the middle of the lead I, and the components are leads, inductance elements or capacitance elements;
The first resonance structure comprises a second lead, and two ends of the second lead are connected with the grounding plate;
The first resonance structure further comprises m capacitance elements, m is an integer greater than or equal to 1, and the capacitance elements are connected to the middle part of the second lead;
The T-shaped decoupling structure comprises: the second clearance area is positioned at the outer side of the grounding plate; and the third lead is positioned in the clearance area II, connected with the grounding plate, connected with the third lead and formed into a T-shaped structure with the third lead.
2. The MIMO antenna of claim 1, wherein n components are connected in series in a middle portion of the first wire in a case where n is greater than or equal to 2.
3. The MIMO antenna according to claim 2, wherein in the case where m is greater than or equal to 2, m capacitive elements are connected in series to the middle of the second wire.
4. The MIMO antenna of claim 3 wherein the T-shaped decoupling structure further comprises h inductive elements, h being an integer greater than or equal to 1, and the inductive elements being connected to the middle of the third conductor.
5. The MIMO antenna of claim 4 wherein in the case where h is greater than or equal to 2, h inductive elements are connected in series in the middle of the third wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310748686.1A CN116864985B (en) | 2023-06-25 | 2023-06-25 | MIMO antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310748686.1A CN116864985B (en) | 2023-06-25 | 2023-06-25 | MIMO antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116864985A CN116864985A (en) | 2023-10-10 |
| CN116864985B true CN116864985B (en) | 2024-09-17 |
Family
ID=88224302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310748686.1A Active CN116864985B (en) | 2023-06-25 | 2023-06-25 | MIMO antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116864985B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317103A (en) * | 2017-06-23 | 2017-11-03 | 曲龙跃 | A kind of integral type dual-antenna system |
| CN114843779A (en) * | 2022-06-13 | 2022-08-02 | 深圳汉阳天线设计有限公司 | Double-antenna structure with high isolation and design method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921038A (en) * | 2015-12-24 | 2017-07-04 | 华为技术有限公司 | Multi-input/output antenna |
| CN110829026B (en) * | 2019-12-06 | 2024-10-11 | 朴海燕 | Isolated ground radiation antenna and MIMO antenna system |
| CN113381184B (en) * | 2021-05-06 | 2022-05-24 | 荣耀终端有限公司 | Antenna decoupling structure, MIMO antenna and terminal |
-
2023
- 2023-06-25 CN CN202310748686.1A patent/CN116864985B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317103A (en) * | 2017-06-23 | 2017-11-03 | 曲龙跃 | A kind of integral type dual-antenna system |
| CN114843779A (en) * | 2022-06-13 | 2022-08-02 | 深圳汉阳天线设计有限公司 | Double-antenna structure with high isolation and design method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116864985A (en) | 2023-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9160079B2 (en) | Compact multi-band antenna | |
| CN210489828U (en) | Isolated ground radiation antenna and MIMO antenna system | |
| US9407014B2 (en) | Antenna device | |
| CN210723351U (en) | Integrated MIMO antenna system | |
| CN104518283A (en) | Antenna with Multifrequency Capability for Miniaturized Applications | |
| KR20110093599A (en) | Ground radiator using capacitor | |
| CN110829026B (en) | Isolated ground radiation antenna and MIMO antenna system | |
| KR101740060B1 (en) | Antenna Feeding Structure and Antenna | |
| CN111129752A (en) | Self-decoupling MIMO antenna system | |
| CN111463571A (en) | Self-decoupling MIMO antenna system based on orthogonal current mode | |
| KR101174400B1 (en) | Space-adaptive self-resonator for wireless power transfer based on resonance | |
| RU2566608C2 (en) | High-frequency antenna | |
| CN102906938A (en) | Antenna having a broadband power supply structural body, and a power supply method | |
| CN114843779A (en) | Double-antenna structure with high isolation and design method | |
| CN110931961A (en) | Compact MIMO antenna system based on connecting wire | |
| CN116864985B (en) | MIMO antenna | |
| CN216750303U (en) | Antenna structure and electronic equipment | |
| Ohira et al. | Dipole antenna pair revisited from kQ product and Poincare distance for wireless power transfer invited | |
| WO2011126306A1 (en) | Antenna having a broadband power supply structural body, and a power supply method | |
| CN116417794B (en) | High-isolation MIMO antenna | |
| CN213460094U (en) | Double-radiator antenna and electronic equipment | |
| CN210723352U (en) | Compact MIMO antenna system based on connecting wire | |
| CN115207622B (en) | Double-fed monomer antenna and electronic equipment | |
| KR101605228B1 (en) | Multiband Internal Antenna using Loop Structure | |
| CN107611568B (en) | Antenna and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |