CN108777351B - MIMO planar antenna system for 5G communication and mobile terminal thereof - Google Patents
MIMO planar antenna system for 5G communication and mobile terminal thereof Download PDFInfo
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- CN108777351B CN108777351B CN201810347488.3A CN201810347488A CN108777351B CN 108777351 B CN108777351 B CN 108777351B CN 201810347488 A CN201810347488 A CN 201810347488A CN 108777351 B CN108777351 B CN 108777351B
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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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
- H01Q1/2266—Supports; Mounting means by structural association with other equipment or articles used with computer equipment disposed inside the computer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- 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
-
- 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
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses a MIMO planar antenna system for 5G communication and a mobile terminal thereof, wherein the MIMO planar antenna system for 5G communication comprises at least eight planar antenna units, and is characterized in that the planar antenna units are pentagonal in shape and comprise a first long side, a second long side, a first short side, a third long side and a second short side which are connected end to end in sequence, and a feed point is arranged on the planar antenna units and is close to the second short side. Different from the traditional rectangular planar antenna unit, the planar antenna unit is pentagonal and comprises three long sides and two short sides, so that the isolation between the antenna units is high, the channel capacity can be effectively increased, and the feeding point is arranged close to the second short side, so that the planar antenna unit can be effectively excited to generate double resonance; the planar antenna unit of the invention has greatly reduced occupied area, and is beneficial to saving space and reducing cost when being applied to a mobile terminal.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a MIMO planar antenna system for 5G communication and a mobile terminal thereof.
Background
In 2017, the China industry and communication department has defined 5G Sub-6 (lower than 6 GHz) frequency bands of 3.3-3.6 GHz and 4.8-5 GHz, and has disclosed and collected ideas of 24.75-27.5 GHz and 37-42.5 GHz millimeter wave 5G frequency band planning. As is well known, MIMO (Multi-Input-Multi-Output) antenna technology can effectively improve channel capacity and communication quality, and will be applied to an antenna system of 5G Sub-6. In order to ensure the performance and the space of the 5G Sub-6MIMO antenna system, the metal back shell of the existing mobile terminal equipment is likely to be replaced by nonmetal materials such as glass, ceramic, plastic and the like; however, in order to secure the mechanical strength of the mobile terminal, the metal frame will be largely preserved, so that the headroom and the "ground" height of the antenna will be greatly reduced, which makes the 5GSub-6MIMO antenna design difficult.
In general, a conventional rectangular planar antenna structure is used for a mobile terminal device based on a metal frame, and as shown in fig. 1, a schematic diagram of a conventional MIMO rectangular planar antenna system with 8 antenna units in 5G Sub-6 is shown, and three resonances, 3.4GHz, 4.1GHz and 5GHz, respectively, can be excited by a suitable feeding manner. As shown in FIG. 2, the S parameter diagram of the antenna system in FIG. 1 is shown, the isolation of S11 is less than-6 dB in the 3.3-5 GHz frequency band, however, the isolation of S21 at the second resonance is only-8 dB, the isolation of S21 at the 3.3-3.6 GHz is only-14 dB, the isolation of S4.8-5 GHz is only-12 dB, and the lower isolation enables more energy of the antenna unit to be coupled to the adjacent antenna unit, thereby reducing the channel capacity.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the MIMO planar antenna system for 5G communication and the mobile terminal thereof are provided, the isolation between antenna units is high, and the channel capacity can be effectively increased.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a MIMO planar antenna system for 5G communication, includes eight at least planar antenna unit, planar antenna unit's shape is the pentagon, planar antenna unit is including first long limit, the long limit of second, first minor face, third long limit and the second minor face of end to end in proper order, be equipped with the feed point on the planar antenna unit, the feed point is close to the setting of second minor face.
The invention adopts another technical scheme that:
a mobile terminal comprising the MIMO planar antenna system for 5G communication.
The invention has the beneficial effects that: different from the traditional rectangular planar antenna unit, the planar antenna unit is pentagonal and comprises three long sides and two short sides, so that the isolation between the antenna units is high, the channel capacity can be effectively increased, and the feeding point is arranged close to the second short side, so that the planar antenna unit can be effectively excited to generate double resonance; the planar antenna unit of the invention has greatly reduced occupied area, and is beneficial to saving space and reducing cost when being applied to a mobile terminal.
Drawings
Fig. 1 is a schematic structural diagram of a conventional MIMO antenna system for 5G communication on a mobile terminal;
fig. 2 is an S-parameter diagram of the antenna system of fig. 1;
fig. 3 is a schematic structural diagram of a MIMO planar antenna system for 5G communication according to an embodiment of the present invention on a mobile terminal;
fig. 4 is a schematic diagram of a planar antenna unit in a planar antenna system according to a first embodiment of the present invention;
fig. 5 is an S-parameter diagram of the first planar antenna unit in fig. 3;
fig. 6 is an S-parameter diagram of the second planar antenna unit in fig. 3;
fig. 7 is an efficiency diagram of the MIMO planar antenna system for 5G communication of fig. 3;
fig. 8 is an ECC diagram of the MIMO planar antenna system for 5G communication in fig. 3.
Description of the reference numerals:
1. a first planar antenna unit; 2. a second planar antenna element; 3. a planar antenna unit; 4. a dielectric layer; 5. a metal layer; 6. a clearance area; 7. a first long border; 8. a second long border; 31. a first long side; 32. a second long side; 33. a first short side; 34. a third long side; 35. a second short side; 36. a feeding point.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
The most critical concept of the invention is as follows: the planar antenna unit comprises a first long side, a second long side, a first short side, a third long side and a second short side which are connected end to end in sequence, the isolation between the antenna units is high, and the channel capacity can be effectively increased.
Referring to fig. 3 and 4, a MIMO planar antenna system for 5G communication includes at least eight planar antenna units 3, where the shape of the planar antenna unit 3 is pentagonal, the planar antenna unit 3 includes a first long side 31, a second long side 32, a first short side 33, a third long side 34, and a second short side 35 that are sequentially connected end to end, a feeding point 36 is disposed on the planar antenna unit 3, and the feeding point 36 is disposed near the second short side.
From the above description, the beneficial effects of the invention are as follows: different from the traditional rectangular planar antenna unit, the planar antenna unit is pentagonal and comprises three long sides and two short sides, so that the isolation degree between the antenna units is high, the channel capacity can be effectively increased, the feeding point is arranged close to the second short side, the planar antenna unit can be effectively excited to generate double resonance, the number and arrangement modes of the planar antenna unit can be set according to the needs, and the lengths of the first long side, the second long side, the first short side, the third long side and the second short side can be set according to the needs.
Further, the first short side 33 is disposed parallel to the first long side 31, and the second short side 35 is disposed parallel to the second long side 32.
Further, the connection between the first long side 31 and the second long side 32 forms a right angle.
As can be seen from the above description, the planar antenna unit of the present invention may be formed by cutting two acute angles from a planar antenna having a right triangle shape.
Further, the connection between the first long side 31 and the second long side 32 forms an acute angle or an obtuse angle.
As can be seen from the above description, the planar antenna unit of the present invention may be formed by cutting two acute angles from an acute triangle or an obtuse triangle.
The invention relates to another technical scheme that:
a mobile terminal comprising the MIMO planar antenna system for 5G communication.
As can be seen from the above description, when applied to a mobile terminal, the planar antenna unit 3 occupies a substantially reduced area, which is beneficial to saving space and reducing cost.
Further, the antenna further comprises a dielectric plate and a metal frame, the dielectric plate is rectangular, the metal frame comprises a first long frame 7 and a second long frame 8, the first long frame 7 is close to one long side of the dielectric plate, the second long frame 8 is close to the other long side of the dielectric plate, and the planar antenna unit 3 is close to the first long frame 7 or the second long frame 8.
As is apparent from the above description, the planar antenna unit is disposed near both long sides of the mobile terminal.
Further, the number of the planar antenna units 3 is eight.
Further, the planar antenna unit 3 includes a first antenna group, a second antenna group, a third antenna group and a fourth antenna group, where the first antenna group, the second antenna group, the third antenna group and the fourth antenna group each include two planar antenna units 3, the first antenna group and the second antenna group are respectively close to the first long frame 7 and are symmetrically arranged relative to the long-edge center line of the dielectric plate, and the third antenna group and the fourth antenna group are respectively close to the second long frame 8 and are symmetrically arranged relative to the long-edge center line of the dielectric plate.
Further, the first antenna group and the second antenna group form a first antenna assembly, the third antenna group and the fourth antenna group form a second antenna assembly, and the first antenna assembly and the second antenna assembly are symmetrically arranged relative to the center line of the short side of the dielectric plate.
Further, the dielectric plate comprises a metal layer 5 and a dielectric layer 4 which are sequentially stacked, a clearance area 6 is formed in a non-overlapping area of the dielectric layer 4 and the metal layer 5, the clearance area 6 is close to two short sides of the dielectric plate, and a 2G antenna, a 3G antenna, a 4G antenna, a WIFI antenna, a Bluetooth antenna and a GPS antenna are respectively arranged in the clearance area 6.
From the above description, it is clear that the planar antenna system of the present invention does not affect the existing arrangement of other antennas.
Referring to fig. 3 to 8, a first embodiment of the present invention is as follows:
a mobile terminal as shown in fig. 3 includes a dielectric plate, a metal frame, and a MIMO planar antenna system for 5G communication, where the MIMO planar antenna system for 5G communication includes at least eight planar antenna units 3, and in this embodiment, 8 planar antenna units 3 are illustrated as an example. The mobile terminal can be a handheld device such as a mobile phone and a tablet, namely, the mobile terminal can be a mobile phone with a frame made of metal and a rear shell made of nonmetal. As shown in fig. 4, the planar antenna unit 3 is pentagonal, the planar antenna unit 3 includes a first long side 31, a second long side 32, a first short side 33, a third long side 34, and a second short side 35 that are connected end to end in sequence, a feeding point 36 is disposed on the planar antenna unit 3, the feeding point 36 is disposed near the second short side 35, and a specific position of the feeding point 36 can be adjusted appropriately as required. Preferably, the first short side 33 is disposed parallel to the first long side 31, and the second short side 35 is disposed parallel to the second long side 32. In this embodiment, the connection between the first long edge 31 and the second long edge 32 may form a right angle, and the connection between the first long edge 31 and the second long edge 32 may also form an acute angle or an obtuse angle. The lengths of the first long side 31, the second long side 32, the first short side 33, the third long side 34, and the second short side 35, and the angles of the junctions of the respective sides may be set as needed.
The shape of dielectric plate is the rectangle, the metal frame includes first long frame 7 and the long frame 8 of second, first long frame 7 is close to one of them long limit setting of dielectric plate, the long frame 8 of second is close to another long limit setting of dielectric plate, planar antenna unit 3 is close to first long frame 7 or the long frame 8 setting of second. The planar antenna unit 3 includes first antenna group, second antenna group, third antenna group and fourth antenna group, first antenna group, second antenna group, third antenna group and fourth antenna group all include two the planar antenna unit 3, first antenna group and second antenna group are close to respectively first long frame 7 sets up, just first antenna group and second antenna group are for the long limit central line symmetry setting of dielectric slab, third antenna group and fourth antenna group are close to respectively second long frame 8 sets up, just third antenna group and fourth antenna group are for the long limit central line symmetry setting of dielectric slab. The first antenna assembly and the second antenna assembly form a first antenna assembly, the third antenna assembly and the fourth antenna assembly form a second antenna assembly, and the first antenna assembly and the second antenna assembly are symmetrically arranged relative to the center line of the short side of the dielectric plate. In this implementation, the dielectric plate includes metal level 5 and dielectric level 4 that stacks gradually and sets up, and metal level 5 is located the below of dielectric level 4, and the area of dielectric level 4 is greater than metal level 5, and metal level 5 can be regarded as the reference "ground" of plane antenna unit 3, is equivalent to the metal part such as mainboard, platelet, battery and the metal center of cell-phone, dielectric level 4 and 5 non-overlapping area are clearance district 6, clearance district 6 is close to two minor faces setting of dielectric plate, be equipped with 2G antenna, 3G antenna, 4G antenna, WIFI antenna, bluetooth antenna and GPS antenna respectively in clearance district 6.
In this embodiment, the planar antenna unit 3 may be manufactured by FPC technology and attached to a non-metal back shell or middle frame, or may be laser etched to a non-metal back shell or support by LDS technology.
As shown in fig. 5, the S parameter diagram of the first planar antenna unit 1 in the MIMO planar antenna system for 5G communication is shown, where it can be seen that in the frequency bands of 3.3-3.6 GHz and 4.8-5 GHz, S11 is less than-7.3 dB, and the isolation between other antennas is worst S51, which is less than-17.7 dB.
As shown in fig. 6, the S parameter diagram of the second planar antenna unit 2 in the MIMO planar antenna system for 5G communication is shown, where it can be seen that in the frequency bands of 3.3-3.6 GHz and 4.8-5 GHz, S11 is less than-6.4 dB, and the isolation between other antennas is worst S62, which is less than-17.8 dB.
As shown in fig. 7, the efficiency of the MIMO planar antenna system for 5G communication is shown, and it can be seen from the graph that the efficiency of the antenna is above 68.8% in the frequency bands of 3.3-3.6 GHz and 4.8-5 GHz.
As shown in fig. 8, the ECC diagram of the MIMO planar antenna system for 5G communication is shown, where the ECC of the antenna is less than 0.02 in the 3.3-3.6 GHz and 4.8-5 GHz frequency bands.
The MIMO planar antenna system for 5G communication in the embodiment can cover 3.3-3.6 GHz and 4.8-5 GHz dual-band in 5G communication, has high isolation between planar antenna units and increased channel capacity, has small occupied area, can effectively save mobile phone space and reduces cost.
In summary, the MIMO planar antenna system for 5G communication and the mobile terminal thereof provided by the present invention have high isolation between planar antenna units, increased channel capacity, and can effectively save space of the mobile terminal and reduce cost.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (9)
1. The MIMO planar antenna system for 5G communication comprises at least eight planar antenna units, and is characterized in that the planar antenna units are pentagonal in shape, each planar antenna unit comprises a first long side, a second long side, a first short side, a third long side and a second short side which are sequentially connected end to end, a feed point is arranged on each planar antenna unit, and the feed point is arranged close to the second short side;
the first short side is parallel to the first long side, and the second short side is parallel to the second long side.
2. The MIMO planar antenna system for 5G communication as claimed in claim 1, wherein the junction of the first long side and the second long side forms a right angle.
3. The MIMO planar antenna system for 5G communication as claimed in claim 1, wherein the junction of the first long side and the second long side forms an acute angle or an obtuse angle.
4. A mobile terminal comprising the MIMO planar antenna system for 5G communication of any one of claims 1-3.
5. The mobile terminal of claim 4, further comprising a dielectric plate and a metal bezel, wherein the dielectric plate is rectangular in shape, the metal bezel comprises a first long bezel and a second long bezel, the first long bezel is disposed proximate one of the long sides of the dielectric plate, the second long bezel is disposed proximate the other long side of the dielectric plate, and the planar antenna unit is disposed proximate either the first long bezel or the second long bezel.
6. The mobile terminal of claim 5, wherein the number of planar antenna units is eight.
7. The mobile terminal of claim 6, wherein the planar antenna unit includes a first antenna group, a second antenna group, a third antenna group, and a fourth antenna group, wherein the first antenna group, the second antenna group, the third antenna group, and the fourth antenna group each include two planar antenna units, the first antenna group and the second antenna group are disposed near the first long border, respectively, and the first antenna group and the second antenna group are disposed symmetrically with respect to a long border center line of the dielectric plate, the third antenna group and the fourth antenna group are disposed near the second long border, respectively, and the third antenna group and the fourth antenna group are disposed symmetrically with respect to a long border center line of the dielectric plate.
8. The mobile terminal of claim 7, wherein the first antenna group and the second antenna group form a first antenna assembly, and the third antenna group and the fourth antenna group form a second antenna assembly, the first antenna assembly and the second antenna assembly being symmetrically disposed with respect to a short side center line of the dielectric plate.
9. The mobile terminal according to claim 5, wherein the dielectric plate comprises a metal layer and a dielectric layer which are sequentially stacked, a non-overlapping area of the dielectric layer and the metal layer is a clearance area, the clearance area is arranged close to two short sides of the dielectric plate, and a 2G antenna, a 3G antenna, a 4G antenna, a WIFI antenna, a bluetooth antenna and a GPS antenna are respectively arranged in the clearance area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810347488.3A CN108777351B (en) | 2018-04-18 | 2018-04-18 | MIMO planar antenna system for 5G communication and mobile terminal thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810347488.3A CN108777351B (en) | 2018-04-18 | 2018-04-18 | MIMO planar antenna system for 5G communication and mobile terminal thereof |
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| CN108777351A CN108777351A (en) | 2018-11-09 |
| CN108777351B true CN108777351B (en) | 2023-10-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021000079A1 (en) * | 2019-06-29 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Antenna module and mobile terminal |
| WO2021000081A1 (en) * | 2019-06-29 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Antenna module and mobile terminal |
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