CN108565551B - Plane broadband millimeter wave MIMO antenna - Google Patents
Plane broadband millimeter wave MIMO antenna Download PDFInfo
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- CN108565551B CN108565551B CN201810563930.6A CN201810563930A CN108565551B CN 108565551 B CN108565551 B CN 108565551B CN 201810563930 A CN201810563930 A CN 201810563930A CN 108565551 B CN108565551 B CN 108565551B
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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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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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 plane broadband millimeter wave MIMO antenna, which comprises a dielectric substrate, an excitation port, a floor, a first radiation unit group and a second radiation unit group; the first radiation unit group consists of a first radiation unit and a second radiation unit, the first radiation unit is formed by connecting two strip-shaped patches which are not in the same direction, one strip-shaped patch is connected with the excitation port, the other strip-shaped patch is close to the center of the medium substrate, and the second radiation unit is a strip-shaped patch which is close to the first radiation unit and is close to the center of the medium substrate; the second radiation unit group is composed of a third radiation unit and a fourth radiation unit, the third radiation unit is formed by connecting two strip-shaped patches which are not in the same direction, one strip-shaped patch is connected with one end of a floor, the other strip-shaped patch is close to the center of the medium substrate, the other end of the floor is connected with an excitation port, and the fourth radiation unit is a strip-shaped patch which is close to the third radiation unit and is close to the center of the medium substrate. The invention is independently controllable and has good characteristics.
Description
Technical Field
The invention relates to the technical field of millimeter wave antennas, in particular to a planar broadband millimeter wave MIMO antenna.
Background
Millimeter wave refers to electromagnetic waves having frequencies in the range of 30GHz-300GHz, corresponding to wavelengths in the range of 1mm-10mm. In recent years, due to the current situation of crowding of spectrum resources and the continuous increase of demand for high-speed communication, the millimeter wave field has become an extremely active field for research, development and utilization of international electromagnetic spectrum resources. The millimeter wave frequency band has a large number of continuous spectrum resources, and provides possibility for realizing ultra-high-speed broadband wireless communication.
In 2010, the millimeter wave national emphasis laboratory of the university of eastern and south has proposed to develop the millimeter wave near-remote communication standard Q-LINKPAN (where Q represents the Q-band at 40-50 GHz, LINKPAN represents that short-distance high-speed coverage (PAN) and long-distance high-speed transmission (LINK) can be supported) in China, and research is carried out in the same year. The ieee802.11aj Task Group (TG) formally holds for 9 months 2012. The standard is mainly driven by enterprises and research institutions in China, and comprises two frequency bands of 59-64 GHz and 43.5-47 GHz, wherein IEEE802.1laj (45 GHz) is mainly based on a short-range standard Q-LINKPAN-S. In 12 months in 2013, the industrial information system respectively issues notification of frequency use matters of the point-to-point wireless access system in the 40-50 GHz frequency band fixed service and the broadband wireless access system in the mobile service. Short-range high-rate communication (PAN) is allocated 5.9GHz (42.3 GHz-47GHz,47.2GHz-48.4 GHz), mobile service planning in the frequency band is used for broadband wireless access systems, while long-range high-rate communication (LINK) is allocated 3.6GHz (40.5 GHz-42.3GHz,48.4GHz-50.2 GHz), and fixed service planning in the frequency band is used for point-to-point wireless access systems. These indicate that the millimeter wave communication technology in China will be spread out in the Q-band.
The physical layer transmission of Q-LINKPAN or ieee802.1laj (45 GHz) is intended to employ a MIMO technique (i.e., a MIMO technique). The technology can effectively improve the capacity and reliability of a wireless communication system under the condition of limited frequency spectrum resources, and is widely applied to a plurality of wireless communication systems. The use of the millimeter wave band in mobile communication systems will allow base stations to carry hundreds or thousands of antennas and to operate simultaneously, and this key technology is therefore also known as "Massive MIMO". The development of millimeter wave communication technology in China provides opportunities for designing millimeter wave antennas and challenges. Meanwhile, with the high-speed development of mobile intelligent terminals, the design of millimeter wave antennas applied to mobile phone terminals will also become a hot spot and difficulty in future research.
Millimeter wave antennas and MIMO antenna decoupling have been studied and invented with some success. With the rapid development of millimeter wave wireless traffic, much research has focused on how to achieve broadband of millimeter wave antennas. In many millimeter wave antenna research and inventive designs, SIW (substrate integrated waveguide), multilayer PCB (printed circuit board), LTCC (low temperature carbon fired ceramic) and the like technologies are mentioned and used. Since the 60GHz band is freely opened, a considerable part of the antenna design of the invention is mainly applied to the band, but the invention of the millimeter wave antenna applied to the Q-band is relatively few. In the MIMO antenna, miniaturization and wideband antenna research and design have been paid attention to. Many related inventions have proposed various methods for improving isolation between small MIMO antenna elements. While few inventions apply to small MIMO antenna designs in the Q-band.
Amer Hagras et al, in 2012, in IEEE Antennas and Propagation Society International Symposium, entitled "Low-mutual coupling antenna array for millimeter-wave MIMO applications" which is an antenna operating in the 60GHz band, use a dielectric resonant antenna as the element antenna, and a slot etched in the floor to "block" the surface current, while the metal strip between the two antennas acts as a resonant element, which reduces the mutual coupling between the antenna elements.
In the existing millimeter wave antenna design, how to increase the impedance bandwidth is mainly considered, the independent and controllable performance is considered, and the problem of how to reduce the mutual coupling between antenna units is rarely considered in the design of MIMO (multiple input multiple output) of the antenna.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a plane broadband millimeter wave MIMO antenna which is independently controllable, compact in structure and good in characteristics, simultaneously realizes the characteristics of low mutual coupling, wide bandwidth and the like, has the design requirement of a terminal MIMO antenna system with controllable performance, and is suitable for being integrated on a communication terminal equipment system.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: a planar broadband millimeter wave MIMO antenna comprises a dielectric substrate, an excitation port, a floor, a first radiation unit group and a second radiation unit group; the first radiation unit group is printed on the front surface of the medium substrate and consists of a first radiation unit and a second radiation unit, the first radiation unit is formed by connecting two strip-shaped patches which are not in the same direction, one strip-shaped patch is connected with an excitation port positioned at the edge of the medium substrate, the other strip-shaped patch is close to the center of the medium substrate, and the second radiation unit is a strip-shaped patch and is positioned beside the strip-shaped patch of the first radiation unit which is close to the center of the medium substrate; the second radiation unit group is printed on the back of the medium substrate and consists of a third radiation unit and a fourth radiation unit, the third radiation unit is formed by connecting two strip-shaped patches which are not in the same direction, one strip-shaped patch is connected with one end of a floor printed on the back of the medium substrate, the other strip-shaped patch is close to the center of the medium substrate, the other end of the floor is connected with an excitation port, and the fourth radiation unit is a strip-shaped patch and is positioned beside the strip-shaped patch of the third radiation unit which is close to the center of the medium substrate.
The first radiating element groups are parallel to each other, and strip-shaped metal strips printed on the front surface of the dielectric substrate are arranged between the two first radiating element groups; the second radiating element groups are parallel to each other, and a T-shaped slot etched on the back surface of the medium substrate is arranged between the two second radiating element groups.
The first radiating element group is perpendicular to each other, and the second radiating element group is perpendicular to each other.
The second radiating element of the first radiating element group is parallel to the strip-shaped patch of the first radiating element, which is close to the center of the dielectric substrate, and the other strip-shaped patch of the first radiating element is perpendicular to the edge of the dielectric substrate.
The fourth radiating element of the second radiating element group is parallel to the strip-shaped patch of the third radiating element, which is close to the center of the dielectric substrate, and the other strip-shaped patch of the third radiating element is perpendicular to the edge of the dielectric substrate.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, four patch radiating units are introduced, so that the impedance bandwidth is greatly increased, and by properly adjusting the size of each microstrip patch unit, the independent controllability of each resonance point can be realized, and the good impedance bandwidth can be obtained.
2. For the antennas of the two unit groups, the strip-shaped metal belt is introduced into the front surface of the dielectric substrate, and the T-shaped slot is introduced into the bottom surface, so that the MIMO antenna array can obtain good isolation in a very wide frequency range.
3. The invention has wider impedance bandwidth and simpler structure, and is suitable for various millimeter wave mobile communication system devices.
Drawings
Fig. 1 is a schematic front view of the antenna of the present invention in embodiment 1.
Fig. 2 is a schematic bottom view of the antenna of the invention in embodiment 1.
Fig. 3 is a diagram showing the simulation results of the S-parameters of the antenna of the present invention in example 1.
Fig. 4 is a schematic front view of an antenna with two parallel unit groups in embodiment 2.
Fig. 5 is a schematic diagram of the bottom surface of the antenna with two parallel unit groups in embodiment 2.
Fig. 6 is a diagram showing the simulation result of the S-parameter of the antenna in example 2.
Fig. 7 is a schematic front view of an antenna with two vertically arranged unit groups in embodiment 3.
Fig. 8 is a schematic diagram of the bottom surface of the antenna with two unit groups vertically arranged in embodiment 3.
Fig. 9 is a diagram showing the simulation result of the S-parameter of the antenna in embodiment 3.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Example 1
As shown in fig. 1 and fig. 2, the planar wideband millimeter wave MIMO antenna provided in this embodiment includes a dielectric substrate 5, an excitation port 6, a floor 7, a first radiating element group and a second radiating element group, where the material of the dielectric substrate 5 used is Rogers 5880, and the thickness of the dielectric substrate is 0.508mm, the first radiating element group is printed on the front surface of the dielectric substrate 5, and is composed of a first radiating element 1 and a second radiating element 2, where the first radiating element 1 is formed by connecting two strip-shaped patches that are not in the same direction, and one of the strip-shaped patches is perpendicular to the edge of the dielectric substrate 5 and is connected with the excitation port 6 located at the edge of the dielectric substrate 5, the other strip-shaped patch is close to the center of the dielectric substrate 5, and the second radiating element 2 is a strip-shaped patch located beside the strip-shaped patch of the first radiating element 1 close to the center of the dielectric substrate 5 and is parallel to the strip-shaped patch; the second radiation unit group is printed on the back of the dielectric substrate 5 and consists of a third radiation unit 3 and a fourth radiation unit 4, the third radiation unit 3 is formed by connecting two strip-shaped patches which are not in the same direction, one strip-shaped patch is perpendicular to the edge of the dielectric substrate 5 and is connected with one end of a floor 7 printed on the back of the dielectric substrate 5, the other strip-shaped patch is close to the center of the dielectric substrate 5, the other end of the floor 7 is connected with an excitation port 6, and the fourth radiation unit 4 is a strip-shaped patch, is positioned beside the strip-shaped patch of the third radiation unit 3 close to the center of the dielectric substrate 5 and is parallel to the strip-shaped patch.
As shown in fig. 3, the first resonance point 31 in the figure is mainly controlled by the first radiation unit 1, and the resonance point 31 can be moved by adjusting the length of the first radiation unit 1; the second resonance point 32 is generated by the third radiating element 3, and the resonance point 32 can be moved by adjusting the length of the second radiating element 3; the third resonance point 33 is mainly controlled by the second radiation unit 2 and the fourth radiation unit 4, and the resonance point 33 can be moved by adjusting the dimensions of the second radiation unit 2 and the fourth radiation unit 4.
Example 2
As shown in fig. 4 and 5, unlike the embodiment 1, the first radiation unit groups of the present embodiment have two parallel to each other, and a strip-shaped metal strip 8 printed on the front surface of the dielectric substrate 5 is provided between the two first radiation unit groups; the second radiating element groups are parallel to each other, and a T-shaped slot 9 etched on the back surface of the medium substrate 5 is arranged between the two radiating element groups. The impedance bandwidth of the antenna can be very wide by the action of the patch, and the relative bandwidth reaches 57.8% (27.2-49.3 GHz).
The greater the number of radiating elements integrated in a limited space, the more difficult it is to obtain a high degree of isolation. In the existing MIMO antenna design, a decoupling structure is added between the antennas because of mainly aiming at reducing the mutual coupling problem between the antenna units, and in the design, a strip-shaped metal belt 8 and a T-shaped slot 9 are added between two unit groups for reducing the surface current conducted to the other antenna when the antenna works, so that the isolation degree of an excitation port can be well improved.
The antenna provided in this embodiment includes two unit groups and two excitation ports (not shown) on the same side of the dielectric substrate, and two unit groupsIn the middle, a strip metal strip 8 and a floor T-shaped slot 9 are added, effectively reducing the mutual coupling between the units. As can be seen from FIG. 6, at this time S 21 Less than-19 dB in the whole working frequency band, and S 11 Substantially coincident with the case trace when a single antenna occurs, 3 resonance points occur.
Example 3
As shown in fig. 7 and 8, unlike embodiment 1, the first radiating element group of this embodiment has two radiating element groups perpendicular to each other, and the second radiating element group has two radiating element groups perpendicular to each other, and the antenna provided in this embodiment includes two element groups and two excitation ports (not shown in the drawings), the excitation ports are on two adjacent sides of the dielectric substrate, and the decoupling structure is not added to the antenna. As can be seen from FIG. 9, at this time S 21 Less than-15 dB in the whole working frequency band, and S 11 Substantially similar to the case when a single antenna is used.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so variations in shape and principles of the present invention should be covered.
Claims (3)
1. The utility model provides a plane broadband millimeter wave MIMO antenna which characterized in that: the device comprises a dielectric substrate, an excitation port, a floor, a first radiation unit group and a second radiation unit group; the first radiation unit group is printed on the front surface of the medium substrate and consists of a first radiation unit and a second radiation unit, the first radiation unit is formed by connecting two strip-shaped patches which are not in the same direction, one strip-shaped patch is connected with an excitation port positioned at the edge of the medium substrate, the other strip-shaped patch is close to the center of the medium substrate, and the second radiation unit is a strip-shaped patch and is positioned beside the strip-shaped patch of the first radiation unit which is close to the center of the medium substrate; the second radiation unit group is printed on the back of the medium substrate and consists of a third radiation unit and a fourth radiation unit, the third radiation unit is formed by connecting two strip-shaped patches which are not in the same direction, one strip-shaped patch is connected with one end of a floor printed on the back of the medium substrate, the other strip-shaped patch is close to the center of the medium substrate, the other end of the floor is connected with an excitation port, and the fourth radiation unit is a strip-shaped patch and is positioned beside the strip-shaped patch of the third radiation unit which is close to the center of the medium substrate; the first radiating element groups are parallel to each other, and strip-shaped metal strips printed on the front surface of the dielectric substrate are arranged between the two first radiating element groups; the two second radiating element groups are parallel to each other, and a T-shaped slot etched on the back surface of the medium substrate is arranged between the two second radiating element groups; the first radiating element group is perpendicular to each other, and the second radiating element group is perpendicular to each other.
2. A planar broadband millimeter wave MIMO antenna according to claim 1, wherein: the second radiating element of the first radiating element group is parallel to the strip-shaped patch of the first radiating element, which is close to the center of the dielectric substrate, and the other strip-shaped patch of the first radiating element is perpendicular to the edge of the dielectric substrate.
3. A planar broadband millimeter wave MIMO antenna according to claim 1, wherein: the fourth radiating element of the second radiating element group is parallel to the strip-shaped patch of the third radiating element, which is close to the center of the dielectric substrate, and the other strip-shaped patch of the third radiating element is perpendicular to the edge of the dielectric substrate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810563930.6A CN108565551B (en) | 2018-06-04 | 2018-06-04 | Plane broadband millimeter wave MIMO antenna |
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| CN201810563930.6A CN108565551B (en) | 2018-06-04 | 2018-06-04 | Plane broadband millimeter wave MIMO antenna |
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| CN108565551B true CN108565551B (en) | 2023-08-22 |
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| CN111541025B (en) * | 2020-04-10 | 2021-10-26 | 华南理工大学 | Circularly polarized multi-input multi-output dielectric resonator antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470644A (en) * | 2016-01-07 | 2016-04-06 | 华南理工大学 | Millimeter wave MIMO antenna |
| CN106953168A (en) * | 2017-03-28 | 2017-07-14 | 华南理工大学 | A kind of plane millimeter wave mimo antenna |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470644A (en) * | 2016-01-07 | 2016-04-06 | 华南理工大学 | Millimeter wave MIMO antenna |
| CN106953168A (en) * | 2017-03-28 | 2017-07-14 | 华南理工大学 | A kind of plane millimeter wave mimo antenna |
Non-Patent Citations (1)
| Title |
|---|
| 周大利 ; 周骏 ; 杨驾鹏 ; 沈亚 ; .宽带毫米波微带天线的设计.电子元件与材料.2018,(第02期),全文. * |
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| CN108565551A (en) | 2018-09-21 |
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