CN112768876B - 5G MIMO antenna system based on coupling feed and electronic equipment - Google Patents
5G MIMO antenna system based on coupling feed and electronic equipment Download PDFInfo
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- CN112768876B CN112768876B CN202110001803.9A CN202110001803A CN112768876B CN 112768876 B CN112768876 B CN 112768876B CN 202110001803 A CN202110001803 A CN 202110001803A CN 112768876 B CN112768876 B CN 112768876B
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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
- 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
- H01Q1/244—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 extendable from a housing along a given path
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Abstract
The invention discloses a coupling feed-based 5G MIMO antenna system and electronic equipment, which comprise a frame and at least one group of antenna unit groups, wherein each antenna unit group comprises two symmetrical antenna units, and each antenna unit comprises a feed coupling branch and a radiation branch; the feed coupling branch is arranged on the inner side surface of the frame, and the radiation branch is arranged on the outer side surface of the frame; the radiation branch is coupled with the feed coupling branch; the radiation branch is a radiation piece, and the radiation piece is provided with a gap which comprises a first gap, a second gap and a third gap; the first slit comprises a first slit branch, a second slit branch, a third slit branch and a fourth slit branch which are connected in sequence; the second gap comprises a fifth gap branch, a sixth gap branch and a seventh gap branch which are connected in sequence; the third slit is connected with the first slit branch. The invention can simultaneously cover n77, n78 and n79 frequency bands of 5G sub-6, and the space occupied by the antenna is small.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a 5G MIMO antenna system based on coupling feed and electronic equipment.
Background
With the popularization of 5G smart phones and the development of antenna technology, 5G mainly develops towards sub-6 and millimeter waves, the bandwidth resources below 6GHz are mainly used for developing 5G,5G NR comprises partial LTE frequency bands, some frequency bands (n 50, n51, n70 and above) are newly added at home, the 5G NR frequency bands with the same frequency as LTE generally adopt a frequency band multiplexing mode, and the newly-added frequency bands currently authorize 5G sub-6 frequency bands as n77, n78 and n79, namely 3.3GHz-4.2GHz and 4.4GHz-5.0GHz.
The antennas in the mobile phone are more and more, the height of the space reserved for the mobile phone is less and less, and the conventional PIFA antenna (planar inverted F antenna) and the Monopole antenna (Monopole antenna) both require a certain antenna height, which affects the radiation performance of the antenna if the antenna height is too small.
The existing 5G mobile phone antenna design utilizes an antenna support with a certain height, and the 5G antenna is designed on the support, so that due to the space and environment factors of the mobile phone, a sub-6 antenna is difficult to simultaneously support bandwidths as wide as n77, n78 and n79, the three frequency bands are generally divided into three independent antennas, and each antenna supports a certain frequency band. However, this not only increases the number of antennas, but also has a problem of isolation between antennas when space is insufficient, and if MIMO is considered, the space and design of antennas are more difficult. Or a certain frequency band is directly abandoned and only a certain domestic frequency band is supported, but poor user experience is brought to mobile phone users.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the 5G MIMO antenna system based on coupling feeding and the electronic equipment can simultaneously cover n77, n78 and n79 frequency bands of 5G sub-6, and the space occupied by the antenna is small.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a coupling feed-based 5G MIMO antenna system comprises a frame and at least one group of antenna unit groups, wherein each antenna unit group comprises two symmetrical antenna units, and each antenna unit comprises a feed coupling branch and a radiation branch; the feed coupling branch is arranged on the inner side surface of the frame, and the radiation branch is arranged on the outer side surface of the frame; the radiating branch is coupled with the feed coupling branch; the radiation branch is a radiation piece, and a gap is formed in the radiation piece and comprises a first gap, a second gap and a third gap; the first slit comprises a first slit branch, a second slit branch, a third slit branch and a fourth slit branch which are connected in sequence; the second gap comprises a fifth gap branch, a sixth gap branch and a seventh gap branch which are connected in sequence; the third gap is connected with the first gap branch.
The invention also provides an electronic device comprising the coupling feed-based 5G MIMO antenna system.
The invention has the beneficial effects that: the antenna units are combined in pairs in the form of unit groups, and the good isolation between the antennas can be ensured as a result of the symmetry; the feed coupling branches on the inner side face of the frame are coupled with the radiation branches on the outer side face of the frame, the radiation branches are excited to generate resonance of different frequency bands, the n77, n78 and n79 frequency bands of 5G sub-6 can be simultaneously covered, and the requirement of the working frequency band of the antenna is met; an additional switch is not needed, so that the cost is reduced; a bracket is not needed, so that the cost of the bracket is saved; the antenna occupies small space of the equipment and has the characteristics of simple design and convenient use.
Drawings
Fig. 1 is a schematic structural diagram of a 5G MIMO antenna system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a radiation branch according to a first embodiment of the present invention;
fig. 3 is a schematic projection diagram of the feed-coupled branch and the radiating branch of the first embodiment of the present invention on the side of the frame;
fig. 4 is a schematic diagram of antenna parameters according to a first embodiment of the present invention;
fig. 5 is a schematic diagram illustrating isolation between antenna units according to a first embodiment of the present invention;
fig. 6 is a graph illustrating the variation of the antenna efficiency with frequency according to the first embodiment of the present invention.
Description of reference numerals:
1. a frame; 2. an antenna unit; 3. a feed point; 4. a PCB board;
21. coupling the feed branch; 22. a radiating branch;
221. a first slit; 222. a second slit; 223. a third slit;
2211. a first slot branch; 2212. a second slot branch; 2213. a third slot branch; 2214. a fourth slot leg;
2221. a fifth slot branch; 2222. a sixth slot branch; 2223. and a seventh slot branch.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, a coupling feeding based 5G MIMO antenna system includes a frame and at least one antenna unit group, where the antenna unit group includes two symmetric antenna units, and the antenna unit includes a feeding coupling branch and a radiation branch; the feed coupling branch is arranged on the inner side surface of the frame, and the radiation branch is arranged on the outer side surface of the frame; the radiating branch is coupled with the feed coupling branch; the radiation branch is a radiation piece, and a gap is arranged on the radiation piece and comprises a first gap, a second gap and a third gap; the first slit comprises a first slit branch, a second slit branch, a third slit branch and a fourth slit branch which are connected in sequence; the second gap comprises a fifth gap branch, a sixth gap branch and a seventh gap branch which are connected in sequence; the third slit is connected with the first slit branch.
From the above description, the beneficial effects of the present invention are: the antenna units are combined in pairs in a unit group form, and the good isolation between the antennas can be ensured due to the symmetrical result; through a coupling feeding mode, the excitation radiation branch generates resonance of different frequency bands, and can simultaneously cover n77, n78 and n79 frequency bands of 5G sub-6, so that the working frequency band requirement of the antenna is met; a bracket is not needed, so that the cost of the bracket is saved; the antenna occupies small space of the equipment and has the characteristics of simple design and convenient use.
Further, a feeding point is also included, and the feeding point is connected with the feeding coupling branch.
Furthermore, the PCB is arranged in the frame, and the feed point is electrically connected with the PCB.
Further, the projection of the feed coupling branch on the side face of the frame intersects with the projections of the first, second and third slots on the side face of the frame.
As can be seen from the above description, the coupling can be increased.
Further, the resonant frequency of the first gap and the second gap is 3.3-3.8GHz, and the resonant frequency of the third gap is 4.5-5GHz.
As can be seen from the above description, the method has a very wide bandwidth and can simultaneously support the sub-6 frequency band commonly used in China.
Further, the lengths of the first, second and third slots are each one wavelength length of the resonant frequency corresponding thereto.
Further, the width of the gap is greater than or equal to 1mm.
As can be seen from the above description, in order to secure the bandwidth of the antenna, the slot width is at least 1mm.
Further, the thickness of the antenna unit is 1mm.
As can be seen from the above description, the antenna has a small thickness and can be placed anywhere on the side of the device.
Further, the coupling branch is an L-shaped monopole antenna.
The invention also provides an electronic device comprising the coupling feed-based 5G MIMO antenna system.
Example one
Referring to fig. 1 to 6, a first embodiment of the present invention is: A5G MIMO antenna system based on coupling feed can be applied to intelligent terminal equipment, and comprises a frame 1 and at least one group of antenna unit groups, wherein each antenna unit group comprises two antenna units 2 which are symmetrically arranged. In this embodiment, four antenna element groups, that is, eight antenna elements, are provided to implement an 8 × 8 5G MIMO antenna. In fig. 1, two adjacent and symmetrical antenna units located on the same side of the device are an antenna unit group. Each antenna unit 2 includes a feeding coupling branch 21 and a radiation branch 22, the feeding coupling branch 21 is disposed on the inner side surface of the frame 1, and the radiation branch 22 is disposed on the outer side surface of the frame 1.
Wherein, the medial surface of frame is equivalent to the feed face, and the lateral surface is equivalent to the radiating surface. The radiating branches are independent and not connected to the feed coupling branch, and are fed by excitation of the feed coupling branch, thereby generating signals.
Preferably, in this embodiment, the coupling branch is an L-shaped monopole antenna.
As shown in fig. 2, the radiation branch 22 is a radiation plate, and the radiation plate is provided with slits, the slits include a first slit 221, a second slit 222, and a third slit 223, and the third slit 223 is connected to the first slit 221.
Further, the first slot 221 includes a first slot branch 2211, a second slot branch 2212, a third slot branch 2213 and a fourth slot branch 2214 connected in sequence; the second slot 222 includes a fifth slot branch 2221, a sixth slot branch 2222, and a seventh slot branch 2223, which are connected in sequence; the third slit 223 is connected to the first slit branch 2211.
In this embodiment, the first slit is shaped like a Chinese character 'kou' with a notch; the second gap is in an eta shape; the third slit is perpendicular to the first slit branch. The first gap surrounds the second gap.
Further, as shown in fig. 3, a feeding point 3 is further included, and the feeding point is connected to the feeding coupling branch 21. As shown in fig. 1, the portable electronic device further includes a PCB 4, the PCB 4 is disposed in the frame 1, and the feeding point is electrically connected to the PCB. Specifically, one end of the feed point is connected to the feed coupling branch, and the other end is connected to a radio frequency signal source on the PCB board through a connector, where the connector is a metal dome or pogo pin.
In the embodiment, the feed coupling branch of the feed surface is coupled and fed to the radiation branch of the radiation surface, so that resonance is generated, two different branches are excited by the same feed line, a capacitor is generated between the two branches, and the generated high-order modes form the frequency bandwidth meeting the requirement.
As shown in fig. 3, the projection of the feed coupling branch 21 on the side of the bezel 1 intersects the projection of the first slot 221, the second slot 222 and the third slot 223 on the side of the bezel 1. I.e. the three slots all have overlapping parts with the feed coupling branches, which increases the coupling.
The embodiment simultaneously supports the sub-6 frequency band commonly used in China at present, namely 3.3GHz-4.2GHz and 4.4GHz-5.0GHz. The first slot and the second slot are two independent slots, the two slots can be combined together to widen the bandwidth of 3.3GHz-3.8GHz, the third slot is excited to generate 4.4GHz-5GHz resonance, the length of each slot is about one wavelength of the resonance frequency, and the resonance can be shifted left and right by changing the length of the slots. The initial state of the coupling feeding branch is in the middle position of the whole radiation branch, and the bandwidth can be changed and the resonance can be shifted left and right by changing the position of the coupling branch. In order to ensure the bandwidth of the antenna, the width of the slot is at least 1mm.
In this embodiment, the size of the whole device is 160mm × 80mm × 8mm, the 5G MIMO antenna with 8 × 8 is provided, each antenna unit is a sheet-shaped structure with a thickness of 1mm, the used area is 25mm × 8mm × 1mm, and the antenna units are linearly arranged on two side faces of the device frame. FIG. 4 is a S parameter diagram of the 5G MIMO antenna system of the present embodiment, and it can be seen from the diagram that S11 of the 3.4GHz-3.6GHz antenna is below-5 dB, and S11 of the 4.8GHz-5GHz antenna is below-6 dB. Fig. 5 is a schematic diagram of the isolation between the antenna elements, and it can be seen that the antenna spacing is very good, all under-13 dB. Fig. 6 is a graph illustrating the efficiency of the antenna as a function of frequency, and it can be seen that the average efficiency of the antenna is above-3 dB.
In the embodiment, the antenna branches of the radiating surface are excited to generate resonance of different frequency bands in a coupling feeding mode, so that the requirement of the working frequency band of the antenna is met, the n77, n78 and n79 frequency bands of 5G sub-6 can be simultaneously covered, an additional switch is not required to be added, and the cost is reduced; and a plastic bracket is not needed, so that the cost of the bracket is saved. The height of the antenna is only 1mm, and the antenna can be placed at any position of the side surface; the antenna occupies small space of the equipment and has the characteristics of simple design and convenient use.
In summary, according to the 5G MIMO antenna system and the electronic device based on coupling feeding provided by the present invention, the antenna units are combined in pairs in the form of unit groups, and the symmetric result can ensure good isolation between the antennas; the feed coupling branches on the inner side face of the frame are coupled with the radiation branches on the outer side face of the frame, the radiation branches are excited to generate resonance of different frequency bands, the n77, n78 and n79 frequency bands of 5G sub-6 can be simultaneously covered, and the requirement of the working frequency band of the antenna is met; an additional switch is not needed, so that the cost is reduced; a bracket is not needed, so that the cost of the bracket is saved; the antenna occupies small space of the equipment and has the characteristics of simple design and convenient use.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. The 5G MIMO antenna system based on coupling feed is characterized by comprising a frame and at least one group of antenna unit groups, wherein each antenna unit group comprises two symmetrical antenna units, and each antenna unit comprises a feed coupling branch and a radiation branch; the feed coupling branch is arranged on the inner side surface of the frame, and the radiation branch is arranged on the outer side surface of the frame; the radiating branch is coupled with the feed coupling branch; the radiation branch is a radiation piece, and a gap is formed in the radiation piece and comprises a first gap, a second gap and a third gap; the first slit comprises a first slit branch, a second slit branch, a third slit branch and a fourth slit branch which are connected in sequence; the second gap comprises a fifth gap branch, a sixth gap branch and a seventh gap branch which are connected in sequence; the third gap is connected with the first gap branch; the first gap is in a shape of a square with a notch; the second gap is in an eta shape; the third slit is perpendicular to the first slit branch; the first gap surrounds the second gap.
2. The coupled feed based 5G MIMO antenna system of claim 1 further comprising a feed point connected to the feed coupling branch.
3. The feed-coupled-based 5G MIMO antenna system of claim 2 further comprising a PCB disposed within the bezel, wherein the feed point is electrically connected to the PCB.
4. The coupled feed based 5G MIMO antenna system of claim 1, wherein a projection of the feed coupling branch on the bezel side intersects a projection of the first, second and third slots on the bezel side.
5. The coupled feed based 5G MIMO antenna system according to claim 1, wherein the resonant frequency of the first slot and the second slot is 3.3-3.8GHz and the resonant frequency of the third slot is 4.5-5GHz.
6. The coupled feed based 5G MIMO antenna system of claim 1, wherein the lengths of the first, second and third slots are each one wavelength length of its corresponding resonant frequency.
7. The coupled feed based 5G MIMO antenna system of claim 1, wherein the slot has a width greater than or equal to 1mm.
8. The coupled feed based 5G MIMO antenna system of claim 1, wherein the thickness of the antenna elements is 1mm.
9. The coupled feed based 5G MIMO antenna system of claim 1, wherein the coupling branch is an L-shaped monopole antenna.
10. An electronic device comprising a coupled feed based 5G MIMO antenna system according to any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110001803.9A CN112768876B (en) | 2021-01-04 | 2021-01-04 | 5G MIMO antenna system based on coupling feed and electronic equipment |
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| CN202110001803.9A CN112768876B (en) | 2021-01-04 | 2021-01-04 | 5G MIMO antenna system based on coupling feed and electronic equipment |
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| CN112768876A CN112768876A (en) | 2021-05-07 |
| CN112768876B true CN112768876B (en) | 2023-02-14 |
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| CN113675606A (en) * | 2021-08-26 | 2021-11-19 | 昆山睿翔讯通通信技术有限公司 | Coupling feed broadband MIMO antenna assembly and mobile terminal |
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| CN202282452U (en) * | 2011-10-31 | 2012-06-20 | 上海大学 | Multiple-frequency slot antenna for mobile phone with closed metal frame |
| CN105244626A (en) * | 2015-11-02 | 2016-01-13 | 深圳市信维通信股份有限公司 | Cavity backed slot antenna structure |
| CN207677073U (en) * | 2017-11-24 | 2018-07-31 | 深圳市信维通信股份有限公司 | 5G mimo antennas system and handheld device |
| CN109841943A (en) * | 2019-03-01 | 2019-06-04 | 深圳市信维通信股份有限公司 | Three frequency mimo antenna systems and mobile terminal applied to 5G communication |
| CN109860980A (en) * | 2019-03-01 | 2019-06-07 | 深圳市信维通信股份有限公司 | Double frequency mimo antenna system and mobile terminal applied to 5G communication |
| CN110190391A (en) * | 2019-06-20 | 2019-08-30 | 维沃移动通信有限公司 | Antenna and mobile terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336478B (en) * | 2017-01-20 | 2020-06-16 | 上海莫仕连接器有限公司 | Multiple-input multiple-output antenna device and mobile communication equipment |
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2021
- 2021-01-04 CN CN202110001803.9A patent/CN112768876B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202282452U (en) * | 2011-10-31 | 2012-06-20 | 上海大学 | Multiple-frequency slot antenna for mobile phone with closed metal frame |
| CN105244626A (en) * | 2015-11-02 | 2016-01-13 | 深圳市信维通信股份有限公司 | Cavity backed slot antenna structure |
| CN207677073U (en) * | 2017-11-24 | 2018-07-31 | 深圳市信维通信股份有限公司 | 5G mimo antennas system and handheld device |
| CN109841943A (en) * | 2019-03-01 | 2019-06-04 | 深圳市信维通信股份有限公司 | Three frequency mimo antenna systems and mobile terminal applied to 5G communication |
| CN109860980A (en) * | 2019-03-01 | 2019-06-07 | 深圳市信维通信股份有限公司 | Double frequency mimo antenna system and mobile terminal applied to 5G communication |
| CN110190391A (en) * | 2019-06-20 | 2019-08-30 | 维沃移动通信有限公司 | Antenna and mobile terminal |
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