CN110061349A - A kind of broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair - Google Patents
A kind of broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair Download PDFInfo
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- CN110061349A CN110061349A CN201910381177.3A CN201910381177A CN110061349A CN 110061349 A CN110061349 A CN 110061349A CN 201910381177 A CN201910381177 A CN 201910381177A CN 110061349 A CN110061349 A CN 110061349A
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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
- H01Q1/24—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
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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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
-
- 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
-
- 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
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- Computer Networks & Wireless Communication (AREA)
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Abstract
A kind of broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair, comprising: metal floor is provided with one or more floor joint in long side；The metal edge frame of four sides closure connection, is provided with even number frame gap thereon；One group or more of orthogonal antenna pair, every group of orthogonal antenna to contain 2 antenna elements, including apex drive minor matters, first and second sides edged feeder minor matters, first and second coupling minor matters.The orthogonal mode of 2 antenna elements of orthogonal antenna centering, therefore in two antenna set at lower achievable high isolation characteristic.In addition, the modes such as metal edge frame and multi-mode collaborative work are used to further broaden the bandwidth of antenna element.The present invention has many advantages, such as that broadband, metal edge frame are compatible, isolation is high, headroom is small and two antenna set is at suitable for using mobile phone as the 5G mimo antenna of the various small mobile terminals of representative.
Description
Technical field
The invention belongs to antenna technical fields, are related to a kind of 5G MIMO antenna for mobile phone, in particular to a kind of to be based on orthogonal mode
The broadband 5G MIMO antenna for mobile phone of formula pair.
Background technique
With the fast development of mobile communication business, traditional forth generation (4G) mobile communication system can no longer meet day
The demands such as traffic rate, capacity, the time delay that benefit increases.In order to further enhance traffic rate, expand message capacity and reduction
Communication delay, the 5th generation (5G) mobile communication system start in the mobile terminal devices such as mobile phone, tablet computer dispose 6GHz with
Under (Sub-6GHz) frequency range multiple-input and multiple-output (MIMO) antenna.MIMO technology is established by the dual-mode antenna of multiple isolation
A plurality of independent data flow, thus the appearance of communication system can be exponentially promoted in the case where not increasing bandwidth and transmission power
Amount.However, the size-constrained and electromagnetic environment of the small mobile terminals equipment such as mobile phone is complicated, the coupling between antenna can deteriorate
The performance of mimo system brings huge challenge to the design of mimo antenna.Therefore, how in the case where short distance is laid out
It realizes the decoupling between antenna element, is the critical issue of 5G MIMO antenna for mobile phone design.
Currently, both at home and abroad more unified 5G standard bands mainly include n77 (3.3~4.2GHz), n78 (3.3~
3.8GHz) and n79 (4.4~5GHz) three frequency ranges.However, existing 5G MIMO antenna for mobile phone technology, such as patent
[CN108511890A] and document [" Two Asymmetrically Mirrored Gap-Coupled Loop Antennas
as a Compact Building Block for Eight-Antenna MIMO Array in the Future
Smartphone ", Kin-Lu Wong etc., " IEEE Transactions on Antennas and Propagation ", the
Volume 65, in April, 2017] in propose is narrow-band antenna, the 5G standard bands of global general-use can not be completely covered, and do not have
Consider influence of the mobile phone metal edge frame to antenna, not can be used directly in the metal edge frame smart phone of mainstream.
Summary of the invention
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide one kind to be suitable for metal edge frame environment
And the 5G MIMO antenna for mobile phone with broadband radiation characteristic, by orthogonal modes technology make 2 integrated antenna elements realize every
From, and the bandwidth of antenna element is further broadened in such a way that metal edge frame and multi-mode cooperate etc., it can cover
5G n77 of global general-use, n78, n79 frequency range.By the identical orthogonal modes antenna of multiple groups to the metal for being symmetrically deployed in mobile phone
On floor, that is, it may make up 5G MIMO antenna for mobile phone.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair, comprising:
Metal floor 1, edge are provided with N number of floor joint 1a, are covered with medium substrate above the metal floor 1.
Metal edge frame 2, for four sides closure connection structure, bottom edge is connected with the edge of metal floor 1, metal edge frame 2
On be provided with 2N frame gap 3, the first frame gap 3aIt partners frame gap 3 with the second frame gap 3b, the first frame
Gap 3a and the second frame gap 3b are symmetrical along the center line of floor joint 1a, and have centainly with the both ends of floor joint 1a
Spacing；
For N group orthogonal antenna to 4, every group of orthogonal antenna is distributed in a floor joint 1a 4 correspondences, and is located at the first side
Frame gap 3aAnd second between the 3b of frame gap, the orthogonal antenna includes that center first feeds minor matters 4a, side first to 4
Feed minor matters 4b, side second feeds minor matters 4c, the first coupling minor matters 4d and second couples minor matters 4e, the feed minor matters of side first
The feed of 4b and second minor matters 4c, which is symmetrically distributed, feeds the two sides of minor matters 4a, the first coupling minor matters 4d and the second coupling in center first
It closes minor matters 4e to be symmetrically distributed in the two sides of the feed minor matters 4a of center first, the first coupling minor matters 4d is located at side first and feeds branch
It saves 4b and center first is fed between minor matters 4a, the second coupling minor matters 4e is located at the feed minor matters 4c of side second and center first is presented
Between electric minor matters 4a.
The top that the orthogonal antenna is etched in medium substrate to 4, the first feed minor matters 4a and metal edge frame 2 are direct
Connection, or spacing is equipped between metal edge frame 2.
The first feed minor matters 4a is rectangle or T-shape, and the side first feeds minor matters 4b, side second feeds branch
Saving 4c, the first coupling minor matters 4d and the second coupling minor matters 4e is rectangle or " ┌ " type or " ┐ " type.
The side first feeds minor matters 4b and side second feeds and is equipped with spacing between minor matters 4c and metal edge frame 2；Institute
The coupling of the first coupling minor matters 4d and second minor matters 4e is stated to be directly connected to metal edge frame 2；The side first feed minor matters 4b and
Spacing is equipped between first coupling minor matters 4d；The side second feeds minor matters 4cAnd second coupling minor matters 4e between be equipped between
Away from.
The center first feeds minor matters 4a and is motivated by the first feed port 5a in metal floor 1；The side first
Feed minor matters 4b and side second feed minor matters 4c by metal floor 1 the second feed port 5b and third feed port 5c it is same
Time difference shunt excitation is encouraged.
It is connected with matching element 6a between the first feed minor matters 4a and the first feed port 5a, matching can not also be connect
Element.The side first feeds minor matters 4b and side second feeds minor matters 4c and the second feed port 5b and third feed port
It is connected separately with matching element 6b and 6c between 5c, matching element can not also be connect.
The excitation of the difference of the second feed port 5b and third feed port 5c is using differential feed network or integrates
Balun chip.
The first feed port 5a excitation is antenna element one；The second feed port 5b and third feed port
5c difference excitation simultaneously is antenna element two, and the irradiation structure of the antenna element one and antenna element two integrates,
With orthogonal modes characteristic.
The orthogonal modes characteristic refers to: when the first feed port 5a excitation, the antenna element one work in low frequency
Make in monopole antenna mode, the odd times mode of slot antenna is worked in high frequency；When the second feed port 5b and third are presented
When electric port 5c difference excitation simultaneously, the antenna element two works in dipole antenna mode in low frequency, the work in high frequency
Make in the even mode of slot antenna.
In low frequency, the orthogonal mode of monopole antenna and dipole antenna；In high frequency, the odd times and idol of slot antenna
Secondary orthogonal mode.Therefore, two antenna elements (antenna element one and antenna element two) of the orthogonal antenna pair are in broadband
With high isolation characteristic.
Compared with prior art, the present invention is integrated together by 2 antenna elements, and realizes day by orthogonal modes technology
The isolation characteristic of line unit constitutes orthogonal modes antenna pair.The present invention has broadband, metal edge frame compatibility, isolation height, headroom
Small and two antenna set at the advantages that, suitable for using mobile phone as the 5G mimo antenna of the various small mobile terminals of representative.
Detailed description of the invention
Fig. 1 is three dimensional structure diagram of the invention.
Fig. 2 is the antenna plane schematic diagram after metal edge frame is unfolded.
Fig. 3 is enlarged drawing of the orthogonal antenna to (4).
Fig. 4 is the embodiment dimensional drawing of antenna structure described in Fig. 2 and Fig. 3, and unit is millimeter (mm), including (a)
The enlarged drawing of antenna plane figure and (b) orthogonal antenna to (4).
Fig. 5 is the current distribution schematic diagram of present invention low frequency and high frequency under two operating modes, including (a) first
High-frequency current distribution when low-frequency current distribution when feed port motivates, (b) the first feed port motivate, (c) second are fed
Low-frequency current distribution and (d) the second feed port and third feed port difference when port and third feed port difference motivate
High-frequency current distribution when excitation.
Fig. 6 is the antenna S parameter simulation result under the embodiment, reflection coefficient including two antenna elements and they
Between transmission coefficient.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
The present invention is a kind of broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair.Illustrated according to design, gives one
A 5G n77 covering the whole world, n78, n79 frequency range unit 8 MIMO antenna for mobile phone specific embodiment, give with reference to the accompanying drawing
Illustrate:
As shown in Figure 1 it is the three dimensional structure diagram of unit 8 5G MIMO antenna for mobile phone of the present invention, is illustrated in figure 2
By the floor map after metal edge frame expansion in Fig. 1, orthogonal antenna is illustrated in figure 3 to 4 amplified floor map.Knot
Fig. 1, Fig. 2 and Fig. 3 are closed, the antenna includes metal floor 1, metal edge frame 2 and 4 group orthogonal antenna to 4.The metal floor
4 rectangular aperture 1a are provided on 1.The metal edge frame 2 is four sides closure connection structure, is provided with 8 frame gaps 3 thereon.Institute
It states orthogonal antenna to be distributed in rectangular aperture 1a to 4, it includes having, center first feeds minor matters 4a, side first feeds minor matters
4b, side second feed minor matters 4c, the first coupling minor matters 4d and the second coupling minor matters 4e.First feed the minor matters 4a, first
The coupling of coupling minor matters 4d and second minor matters 4e is directly connected to metal edge frame 2；The side first feeds minor matters 4b and side the
Two feed minor matters 4c and metal edge frame 2 are equipped with spacing.Wherein, center first feeds minor matters 4a and is motivated by the first feed port 5a,
Matching element 6a is connected between first feed minor matters 4a and the first feed port 5a；Side first feeds minor matters 4b and side the
Two feed minor matters 4c by the second feed port 5b and third feed port 5c simultaneously difference motivate, side first feed minor matters 4b and
Side second feed be connected separately between minor matters 4c and the second feed port 5b and third feed port 5c matching element 6b and
6c。
It is illustrated in figure 4 antenna embodiment dimensional drawing.The medium substrate uses the FR-4 substrate of 0.8mm thickness, relatively
Dielectric constant is 4.4, loss angle tangent 0.02.The metal floor 1 is etched in Jie by plane electric circuit (PCB) technique
The lower surface of matter substrate 2.The orthogonal antenna is etched in the upper surface of medium substrate to 4 all minor matters.The metal edges
Frame 2 uses the latten(-tin) of 0.2mm thickness, and is connect with metal floor 1 by welding manner part.The matching element uses
The surface mount elements that muRata 0402 is encapsulated, wherein C1=0.5 pico farad, L1=L2=1 nanohenry.The feed port 5b and 5c passes through
Integrated balun chip Anaren BD3150N50100AHF provides difference pumping signal, and input impedance is by 50 ohm of designs.
It is illustrated in figure 5 the implementation of technical solution of the present invention: when the first feed port 5a excitation, the antenna list
Member one works in monopole antenna mode in low frequency, and the odd times mode of slot antenna is worked in high frequency；When the second feed
When port 5b and third feed port 5c difference motivate, the antenna element two works in dipole antenna mode in low frequency,
The even mode of slot antenna is worked in high frequency.In low frequency, the mode of monopole antenna and dipole antenna is mutually just
It hands over；In high frequency, slot antenna odd times mode and even mode are mutually orthogonal.Since the antenna element of orthogonal mode theoretically may be used
Reach infinitely great isolation, thus can be realized in broadband between two antenna elements of the orthogonal modes antenna pair height every
From characteristic.
With Fig. 4 illustrated dimension design antenna reflection coefficient and transmission coefficient as shown in fig. 6, wherein antenna element one-
6dB impedance bandwidth are as follows: 3300-5000MHz, -6dB the impedance bandwidth of antenna element two is at least are as follows: 3300-5500MHz, it can be with
5G n77, n78, n79 frequency range is completely covered.Due to orthogonal mode, the isolation between antenna element one and two is in full frequency band
Both greater than 20dB.Therefore, the present invention for 5G MIMO mobile terminal antenna provide one kind have both broadband, high isolation, low clearance,
Metal edge frame is compatible and two antenna set at etc. characteristics solution.
Claims (10)
1. a kind of broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair characterized by comprising
Metal floor (1), edge are provided with N number of floor joint (1a), are covered with medium substrate above the metal floor (1)；
Metal edge frame (2), for four sides closure connection structure, bottom edge is connected with the edge of metal floor (1), metal edge frame
(2) it is provided with 2N frame gap (3) on, the first frame gap (3a) and the second frame gap (3b) partner frame gap
(3), the first frame gap (3a) and the second frame gap (3b) are symmetrical along the center line of floor joint (1a), and and floor
The both ends in gap (1a) are at regular intervals；
N group orthogonal antenna is distributed in a floor joint (1a) (4), every group of orthogonal antenna to (4) correspondence, and is located at first
Between frame gap (3a) and the second frame gap (3b), the orthogonal antenna includes that center first feeds minor matters to (4)
(4a), side first feed minor matters (4b), side second feeds minor matters (4c), the first coupling minor matters (4d) and the second coupling minor matters
(4e), side first feeds minor matters (4b) and the second feed minor matters (4c) is symmetrically distributed and feeds minor matters (4a) in center first
Two sides, the first coupling minor matters (4d) and the second coupling minor matters (4e) are symmetrically distributed and feed the two of minor matters (4a) in center first
Side, the first coupling minor matters (4d) are located at side first and feed between minor matters (4b) and the feed of center first minor matters (4a), the second coupling
Minor matters (4e) is closed to be located between the feed of side second minor matters (4c) and the feed of center first minor matters (4a).
2. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 1, which is characterized in that it is described just
Hand over antenna that (4) are etched in the top of medium substrate, first feed minor matters (4a) is directly connected to metal edge frame (2), or
Spacing is equipped between person and metal edge frame (2).
3. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 1, which is characterized in that described
One feed minor matters (4a) is rectangle or T-shape, and the side first feeds minor matters (4b), side second feeds minor matters (4c), the
One coupling minor matters (4d) and the second coupling minor matters (4e) are rectangle or " ┌ " type or " ┐ " type.
4. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 1, which is characterized in that the side
Side first feeds minor matters (4b) and side second feeds and is equipped with spacing between minor matters (4c) and metal edge frame (2)；First coupling
It closes minor matters (4d) and the second coupling minor matters (4e) is directly connected to metal edge frame (2)；The side first feed minor matters (4b) and
Spacing is equipped between first coupling minor matters (4d)；The side second feeds and sets between minor matters (4c) and the second coupling minor matters (4e)
There is spacing.
5. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 1, which is characterized in that in described
The heart first feeds minor matters (4a) and is motivated by the first feed port (5a) in metal floor (1)；The side first feeds minor matters
(4b) and side second feed minor matters (4c) by the second feed port (5b) and third feed port (5c) in metal floor (1)
Difference excitation simultaneously.
6. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 5, which is characterized in that described
It is connected with matching element (6a) between one feed minor matters (4a) and the first feed port (5a), the side first feeds minor matters
It is connected separately between (4b) and side second feed minor matters (4c) and the second feed port (5b) and third feed port (5c)
Matching element (6b) and (6c).
7. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 5, which is characterized in that described
The excitation of the difference of two feed ports (5b) and third feed port (5c) uses differential feed network or integrated balun chip.
8. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 6, which is characterized in that described
One feed port (5a) excitation is antenna element one；Second feed port (5b) and third feed port (5c) the same to time difference
It is antenna element two that shunt excitation, which is encouraged, and the irradiation structure of the antenna element one and antenna element two integrates, and is had orthogonal
Mode characteristic.
9. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 8, which is characterized in that it is described just
Hand over mode characteristic to refer to: when the first feed port (5a) excitation, the antenna element one works in monopole day in low frequency
Ray mode works in the odd times mode of slot antenna in high frequency；When the second feed port (5b) and third feed port (5c)
When difference excitation simultaneously, the antenna element two works in dipole antenna mode in low frequency, works in gap in high frequency
The even mode of antenna.
10. the broadband 5G MIMO antenna for mobile phone based on orthogonal modes pair according to claim 9, which is characterized in that in low frequency
When, the orthogonal mode of monopole antenna and dipole antenna；In high frequency, the odd times and even orthogonal mode of slot antenna.
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| CN110931964A (en) * | 2019-10-24 | 2020-03-27 | 广东工业大学 | Miniaturized MIMO multifrequency cell-phone antenna |
| CN111987432A (en) * | 2020-09-04 | 2020-11-24 | 维沃移动通信有限公司 | Antenna structure and electronic device |
| CN111987431A (en) * | 2020-09-04 | 2020-11-24 | 维沃移动通信有限公司 | Antenna structure and electronic device |
| CN112186337A (en) * | 2020-09-14 | 2021-01-05 | 南京航空航天大学 | Dual-frequency high-isolation mobile phone MIMO antenna based on mode orthogonality |
| CN112259966A (en) * | 2020-09-28 | 2021-01-22 | 努比亚技术有限公司 | Multi-frequency band antenna structure |
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| CN112736437A (en) * | 2020-12-22 | 2021-04-30 | 孙齐凯 | 5G antenna and radio frequency device circuit board |
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