CN111244609A - Multi-input multi-output antenna system and mobile terminal - Google Patents
Multi-input multi-output antenna system and mobile terminal Download PDFInfo
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- CN111244609A CN111244609A CN201811435019.3A CN201811435019A CN111244609A CN 111244609 A CN111244609 A CN 111244609A CN 201811435019 A CN201811435019 A CN 201811435019A CN 111244609 A CN111244609 A CN 111244609A
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- 230000005855 radiation Effects 0.000 claims abstract description 96
- 230000003071 parasitic effect Effects 0.000 claims abstract description 61
- 238000004891 communication Methods 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims description 8
- 230000005404 monopole Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- LAXBNTIAOJWAOP-UHFFFAOYSA-N 2-chlorobiphenyl Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1 LAXBNTIAOJWAOP-UHFFFAOYSA-N 0.000 description 1
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- 238000010295 mobile communication Methods 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 230000009466 transformation Effects 0.000 description 1
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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
- H01Q1/12—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
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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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Abstract
The invention relates to the technical field of terminal antennas, in particular to a multi-input multi-output antenna system and a mobile terminal. The system comprises a plurality of antenna radiation units which are arranged on the side of a PCB at intervals in rows, wherein the antenna radiation units are connected with feed points on the PCB; parasitic pieces are arranged between every two adjacent antenna radiation units in each row of antenna radiation units and connected with a grounding point of the PCB, the parasitic pieces are used for generating resonance with the two adjacent antenna radiation units, and the parasitic pieces absorb energy radiated by the antenna radiation units in a resonance mode, so that the isolation between the antenna radiation units can be improved, the impedance matching of the antenna radiation units is improved, the bandwidth of the antenna radiation units is expanded, and the radiation efficiency of the antenna radiation units is improved. The mobile terminal adopts the multi-input multi-output antenna system, and the possibility of arranging more antenna radiation units in a narrow space of the terminal shell is provided, so that the mobile terminal can be suitable for a communication network of 5G or higher level.
Description
Technical Field
The invention relates to the technical field of terminal antennas, in particular to a multi-input multi-output antenna system and a mobile terminal.
Background
The antenna is the most front part of the intelligent terminal for receiving and transmitting radio signal, and when transmitting, the antenna converts the high frequency current in the circuit or the guided wave on the feeding transmission line into spatial electromagnetic wave with certain polarization effectively, and transmits the spatial electromagnetic wave in the specified direction, and when receiving, the antenna performs the reverse transformation. The quality of the antenna performance directly affects the communication quality and the data downloading speed of the intelligent terminal.
With the rapid development of wireless communication technology, consumers have higher and higher requirements on wireless communication quality, and the traditional single-antenna transceiving technology is not only easily affected by adverse factors such as multipath propagation and the like, so that the link performance is unstable, but also the data transmission rate is lower. For multipath fading and improvement of link stability in mobile communication, the MIMO (Multiple-input Multiple-Output) technology is an important innovative research project in the field of wireless communication at present, and by using Multiple antennas (device end or base station end) in an intelligent device, a transmitting end or a receiving end receives more signal spatial streams, so that channel capacity can be obviously improved. Therefore, efforts are constantly being made to advance the evolution of MIMO technology to meet the requirements of high rate transmission, such as the increase from 2x2 to the current 4x4 MIMO. But more antennas also mean more space is occupied, and it becomes obviously more difficult to accommodate more antennas in space-limited devices, especially in the case of the upcoming 5G mobile terminal antenna systems that need to meet 8x8 MIMO.
For mobile terminals, more and more peripheral devices, such as cameras, microphones, LED flash lamps and the like, are reserved for antenna design space, which is limited by the size of the whole terminal, and it is difficult to install multiple antennas, because the spacing between antenna units is small under the size of a narrow terminal, the coupling between antennas is strong, and the strong coupling between MIMO antenna units will reduce the radiation efficiency between antennas, thereby failing to exert the advantages of MIMO antenna technology. Therefore, the coupling between the antennas which are placed in a short distance is reduced, and the technical problem to be solved is urgently solved when the small-size terminal MIMO scheme is designed.
In a narrow mobile phone, as many as 10 (even more than 10) antenna units are designed, 2 of the antenna units are LTE antenna units, and 8 antenna units of 5G are designed, so that many problems need to be faced, such as the problem of arrangement between the antenna units and the problem of isolation between the antenna units. Particularly, the current mobile phone antenna design is designed for the LTE antenna at the top end and the bottom end, so that the space for designing the 5G antenna unit in the middle is correspondingly reduced, and the space between the 5G antenna units is further reduced. It is very challenging how to solve the isolation problem between the antenna elements.
Therefore, how to solve the isolation problem between the antenna units under the condition of small spatial distance is also a difficult point that the improvement of the radiation performance of the antenna units is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a multi-input multi-output antenna system and a mobile terminal, which can realize the isolation between antenna units under the condition of small space distance and improve the radiation performance of the antenna units.
In order to achieve the above object, the present invention provides a mimo antenna system, which includes a plurality of antenna radiating elements spaced in a row on a side of a PCB, wherein the antenna radiating elements are connected to a feeding point on the PCB; and a parasitic piece is arranged between two adjacent antenna radiation units in each row of antenna radiation units, the parasitic piece is connected with the grounding point of the PCB, and the parasitic piece is used for generating resonance with the two adjacent antenna radiation units.
Optionally, two parasitic elements are arranged on a connection line between every two adjacent antenna radiation units in each row.
Optionally, the parasitic element is a parasitic branch, one end of the parasitic branch is connected to the ground point of the PCB, and the length of the parasitic branch satisfies the requirement of generating resonance with two adjacent antenna radiation units.
Optionally, the other end of the parasitic branch is of a bent structure.
Optionally, the two parasitic branches have different lengths and are respectively configured to resonate with the two working frequency bands of the antenna radiation unit.
Optionally, two parasitic branches are arranged on a connection line between every two adjacent antenna radiation units in each row, and the two parasitic branches have the same length and are respectively used for generating resonance with the adjacent antenna radiation units.
Optionally, a metal strip is arranged between two adjacent parasitic pieces, and one end of the metal strip is connected to the ground point.
Optionally, be equipped with one row respectively on the both sides long edge of PCB board the antenna radiation unit is equipped with four in every row the antenna radiation unit, the operating frequency of antenna radiation unit includes 3400 ~ 3800MHz, be equipped with two LTE antennas on one side minor face of PCB board, the operating frequency of LTE antenna includes 698 ~ 960MHz and 1710 ~ 2690 MHz.
Optionally, the Antenna radiation unit is an IFA (Inverted-F Antenna) Antenna, a monopole Antenna or a dipole Antenna, the long sides of the two sides of the PCB are respectively provided with an insulating medium frame, and the Antenna radiation unit is disposed on the insulating medium frame.
According to the multi-input multi-output antenna system provided by the invention, the parasitic piece absorbs the energy radiated by the antenna radiation units in a resonance mode, and the parasitic piece is positioned between two adjacent antenna radiation units, so that the interference between the two adjacent antenna radiation units can be reduced, the isolation between the antenna radiation units is improved, the impedance matching of the antenna radiation units can be further improved, the bandwidth of the antenna radiation units is expanded, and the radiation efficiency of the antenna radiation units is improved.
In addition, the invention also provides a mobile terminal which comprises the multi-input multi-output antenna system, a processor connected with the PCB, a battery module, a touch panel, a wireless communication module, an audio module, a multimedia module and a storage module. Because the mobile terminal adopts the multi-input multi-output antenna system, the possibility of arranging more antenna radiation units in a narrow space of the terminal shell is provided, and the mobile terminal can be adapted to a communication network of 5G or higher level.
Drawings
Fig. 1 is a schematic diagram of a mimo antenna system in accordance with an embodiment of the present invention;
fig. 2 is a schematic diagram of a mimo antenna system in accordance with another embodiment of the present invention;
fig. 3 is a schematic view of a PIFA antenna mounted to a PCB board in an embodiment of the present invention;
fig. 4 is a front view of a monopole antenna and a LET antenna mounted on a PCB board according to an embodiment of the present invention;
fig. 5 is a rear view of a monopole antenna and a LET antenna mounted on a PCB board in an embodiment of the present invention;
fig. 6 is a schematic diagram of a mobile terminal according to an embodiment of the present invention.
Reference numerals:
1. a PCB board; 11. a first antenna clearance area; 12. a second antenna clearance area; 13. an insulating dielectric bezel; 2. an antenna radiation unit; 21. a feed point; 22. a feed pin; 23. a short circuit pin; 3. a parasitic element; 4. a metal strip; 5. an LTE antenna; 100. a mobile terminal; 101. a processor; 102. a battery module; 103. a wireless communication module; 104. a multimedia module; 105. a touch panel; 106. an audio module; 107. and a storage module.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
As shown in fig. 1, a mimo antenna system according to an embodiment of the present invention includes a plurality of antenna radiation units 2 arranged in rows and at intervals on a side of a PCB board 1, that is, the number of the antenna radiation units 2 may be two or more, and the side refers to an area close to a side edge of the PCB board 1, that is, the plurality of antenna radiation units 2 may be arranged on the side edge of the PCB board 1 or on the PCB board 1 close to the side edge; the antenna radiation unit 2 is connected with a feed point 21 on the PCB board 1; a parasitic element 3 is arranged between two adjacent antenna radiation units 2 in each row of antenna radiation units 2, the parasitic element 3 is connected with a grounding point of the PCB board 1, and the parasitic element 3 is used for generating resonance with the two adjacent antenna radiation units 2, that is, the parasitic element 3 can generate resonance in the same frequency band as the antenna radiation units 2.
As can be seen from the above, since the parasitic element 3 absorbs the energy radiated by the antenna radiation unit 2 in a resonant manner, and the parasitic element 3 is located between two adjacent antenna radiation units 2, the interference between two adjacent antenna radiation units 2 can be reduced, the isolation between the antenna radiation units 2 can be improved, the impedance matching of the antenna radiation unit 2 can be further improved, the bandwidth of the antenna radiation unit 2 can be expanded, and the radiation efficiency of the antenna radiation unit 2 can be improved.
In some embodiments, only one parasitic element 3 may be disposed between every two adjacent antenna radiation elements 2 in each row, and the parasitic element 3 resonates with the antenna radiation elements 2 on both sides at the same time.
In other embodiments, two parasitic pieces 3 are arranged on the connection line between every two adjacent antenna radiation units 2 in each row, and the two parasitic pieces 3 respectively form resonance with the respective adjacent antenna radiation units 2, so that the absorption rate of radiation of the antenna radiation units 2 on two sides can be improved, and the isolation effect between the antenna radiation units 2 is better.
In the above embodiments, the parasitic element 3 may be a parasitic branch, and one end of the parasitic branch is connected to the ground point of the PCB board 1. When the number of the parasitic branches is one, the length of the parasitic branches is sufficient to generate resonance with two adjacent antenna radiation units 2 simultaneously; when the number of the parasitic branches is two, the two parasitic branches resonate with the respective adjacent antenna radiation units 2. The parasitic branch knot has a simple structure, and can realize resonance with the antenna radiation unit 2 through the arrangement of the length, thereby achieving the purpose of isolation.
The other end of the parasitic branch can be of a bent structure, and the parasitic branch is resonant with the antenna radiation unit 2 through the length, so that the parasitic branch can be longer, and the space occupied by the bent winding structure can be saved.
In some embodiments, two parasitic branches are arranged on the connection line between every two adjacent antenna radiation units 2 in each row, and the two parasitic branches have the same length and are respectively used for generating resonance with the adjacent antenna radiation units 2. In most cases, each antenna radiation unit 2 works in the same frequency band, and each parasitic branch forms resonance with the adjacent antenna radiation unit 2, so that a good isolation effect can be achieved.
In other embodiments, the lengths of the two parasitic branches are different, the two parasitic branches with different lengths are respectively used for generating resonance with the two working frequency bands of the antenna radiation unit 2, and when one working frequency of two adjacent antenna radiation units 2 jumps, the two parasitic branches therebetween can respectively generate resonance with the antenna radiation units 2 of different frequency bands on two sides, so that an isolation effect can be ensured.
As shown in fig. 2, in some embodiments, a metal strip 4 is disposed between two adjacent parasitic elements 3, and one end of the metal strip 4 is connected to a ground point. The metal strip 4 can further absorb the radiation energy between the antenna radiation units 2, so as to achieve better isolation effect.
Referring to fig. 4 and 5, in some embodiments, a row of antenna radiation units 2 is respectively disposed on the long edges of two sides of the PCB 1, four antenna radiation units 2 are disposed in each row, the antenna radiation units 2 are 5G antennas, and the main operating frequency of the antenna radiation units is 3400-3800 MHz; be equipped with two LTE antennas 5 on one side minor face of PCB board 1, LTE antennas 5's main operating frequency is 698 ~ 960MHz and 1710 ~ 2690MHz, on the PCB board 1 with the position department that LTE antennas 5 correspond is equipped with first antenna headroom district 11, does not influence LTE antennas 5's omnidirectional radiation.
As shown in fig. 3, the Antenna radiation unit 2 may be a PIFA (Planar Inverted-F Antenna) Antenna, the PIFA Antenna has a certain height and strong radiation performance, the PIFA Antenna is disposed on the side of the PCB board 1 opposite to the floor, i.e., the side facing the rear cover of the mobile phone, the feeding pin 22 of the PIFA Antenna is connected to the feeding point 21 of the PCB board 1, and the short-circuit pin 23 of the PIFA Antenna passes through the dielectric substrate of the PCB board 1 and is grounded.
In addition, as shown in fig. 2, 4 and 5, the antenna radiation unit 2 may also be an IFA antenna, a monopole antenna or a dipole antenna, the two long sides of the PCB board 1 are respectively provided with an insulating medium frame, and the antenna radiation unit 2 and the parasitic element 3 are both disposed on the insulating medium frame 13. Moreover, the positions of the PCB board 1 corresponding to the plurality of antenna units are all provided with the second antenna clearance area 12, which does not affect the omnidirectional radiation of the antenna radiation unit 2.
As shown in fig. 6, the present invention further provides a mobile terminal 100, which includes the mimo antenna system of any of the above embodiments, and further includes a processor 101, a battery module 102, a touch panel 103, a wireless communication module 104, an audio module 106, a multimedia module 104, and a storage module 107, which are connected to the PCB board 1. Since the mobile terminal 1 adopts the mimo antenna system, there is a possibility that more antenna radiation units 2 are arranged in a small space of the terminal housing, so that the mobile terminal can be adapted to a 5G or higher level communication network.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A multi-input multi-output antenna system is characterized by comprising a plurality of antenna radiation units which are arranged on the side of a PCB board at intervals in rows, wherein the antenna radiation units are connected with feed points on the PCB board; and a parasitic piece is arranged between two adjacent antenna radiation units in each row of antenna radiation units, the parasitic piece is connected with the grounding point of the PCB, and the parasitic piece is used for generating resonance with the two adjacent antenna radiation units.
2. The mimo antenna system of claim 1, wherein two of the parasitic elements are arranged on a connection line between every adjacent two of the antenna radiating elements in each row.
3. The mimo antenna system of claim 1 or 2, wherein the parasitic element is a parasitic stub, one end of the parasitic stub is connected to a ground point of the PCB, and the length of the parasitic stub is sufficient to generate resonance with two adjacent antenna radiating elements.
4. The mimo antenna system of claim 3, wherein the other end of the parasitic stub is a meander structure.
5. The mimo antenna system of claim 3, wherein the two parasitic stubs have different lengths, and are configured to resonate with two operating frequency bands of the antenna radiating element, respectively.
6. The mimo antenna system of claim 3, wherein two parasitic branches are disposed on a connection line between every two adjacent antenna radiating elements in each row, and the two parasitic branches have the same length and are respectively configured to resonate with the adjacent antenna radiating elements.
7. The mimo antenna system of claim 1 or 2, wherein a metal strip is disposed between two adjacent parasitic elements, and one end of the metal strip is connected to the ground point.
8. The MIMO antenna system of claim 1 or 2, wherein the antenna radiation units are respectively arranged on the long edges of two sides of the PCB, four antenna radiation units are arranged in each row, the working frequency of the antenna radiation units comprises 3400-3800 MHz, two LTE antennas are arranged on the short edge of one side of the PCB, and the working frequency of the LTE antennas comprises 698-960 MHz and 1710-2690 MHz.
9. The mimo antenna system of claim 1, wherein the antenna radiation unit is an IFA antenna, a monopole antenna, or a dipole antenna, and the two long sides of the PCB board are respectively provided with an insulating dielectric frame, and the antenna radiation unit is disposed on the insulating dielectric frame.
10. A mobile terminal comprising the multiple-input multiple-output antenna system according to any one of claims 1 to 9, further comprising a processor, a battery module, a touch panel, a wireless communication module, an audio module, a multimedia module, and a memory module connected to the PCB board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435019.3A CN111244609A (en) | 2018-11-28 | 2018-11-28 | Multi-input multi-output antenna system and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435019.3A CN111244609A (en) | 2018-11-28 | 2018-11-28 | Multi-input multi-output antenna system and mobile terminal |
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| Publication Number | Publication Date |
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| CN111244609A true CN111244609A (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811435019.3A Pending CN111244609A (en) | 2018-11-28 | 2018-11-28 | Multi-input multi-output antenna system and mobile terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224528A (en) * | 2021-04-30 | 2021-08-06 | 黄山学院 | CPW fed 5G communication broadband MIMO terminal antenna |
| CN114069228A (en) * | 2020-08-07 | 2022-02-18 | 华为技术有限公司 | Power supply system of antenna and electronic equipment |
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| KR20150118481A (en) * | 2014-04-14 | 2015-10-22 | 엘지전자 주식회사 | Antenna device of a mobile terminal |
| CN106169653A (en) * | 2016-08-22 | 2016-11-30 | 南京信息工程大学 | Handheld terminal 8 antenna MIMO system |
| CN106921038A (en) * | 2015-12-24 | 2017-07-04 | 华为技术有限公司 | Multi-input/output antenna |
| WO2017212287A1 (en) * | 2016-06-09 | 2017-12-14 | Smart Antenna Technologies Ltd | An antenna system for a portable device |
| CN208904212U (en) * | 2018-11-28 | 2019-05-24 | 珠海市魅族科技有限公司 | Multi-input multi-output antenna system and mobile terminal |
-
2018
- 2018-11-28 CN CN201811435019.3A patent/CN111244609A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150118481A (en) * | 2014-04-14 | 2015-10-22 | 엘지전자 주식회사 | Antenna device of a mobile terminal |
| CN106921038A (en) * | 2015-12-24 | 2017-07-04 | 华为技术有限公司 | Multi-input/output antenna |
| WO2017212287A1 (en) * | 2016-06-09 | 2017-12-14 | Smart Antenna Technologies Ltd | An antenna system for a portable device |
| CN106169653A (en) * | 2016-08-22 | 2016-11-30 | 南京信息工程大学 | Handheld terminal 8 antenna MIMO system |
| CN208904212U (en) * | 2018-11-28 | 2019-05-24 | 珠海市魅族科技有限公司 | Multi-input multi-output antenna system and mobile terminal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069228A (en) * | 2020-08-07 | 2022-02-18 | 华为技术有限公司 | Power supply system of antenna and electronic equipment |
| CN114069228B (en) * | 2020-08-07 | 2023-08-22 | 华为技术有限公司 | Antenna power supply system and electronic equipment |
| CN113224528A (en) * | 2021-04-30 | 2021-08-06 | 黄山学院 | CPW fed 5G communication broadband MIMO terminal antenna |
| CN113224528B (en) * | 2021-04-30 | 2024-05-24 | 黄山学院 | CPW (compact phase-locked loop) feed 5G (5G) communication broadband MIMO (multiple input multiple output) terminal antenna |
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