CN203103510U - MIMO antenna device and communication terminal with MIMO antenna device - Google Patents

MIMO antenna device and communication terminal with MIMO antenna device Download PDF

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Publication number
CN203103510U
CN203103510U CN 201220504586 CN201220504586U CN203103510U CN 203103510 U CN203103510 U CN 203103510U CN 201220504586 CN201220504586 CN 201220504586 CN 201220504586 U CN201220504586 U CN 201220504586U CN 203103510 U CN203103510 U CN 203103510U
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CN
China
Prior art keywords
antenna
rectangular patch
mimo
antenna element
mimo antenna
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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CN 201220504586
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Chinese (zh)
Inventor
李龙
韩伟强
罗振宇
刘锋
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Dongguan Yulong Telecommunication Technology Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Dongguan Yulong Telecommunication Technology Co Ltd
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Application filed by Yulong Computer Telecommunication Scientific Shenzhen Co Ltd, Dongguan Yulong Telecommunication Technology Co Ltd filed Critical Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Priority to CN 201220504586 priority Critical patent/CN203103510U/en
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Publication of CN203103510U publication Critical patent/CN203103510U/en
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Abstract

The utility model is suitable for the technical field of communication, and provides an MIMO antenna device. The antenna device comprises at least two antenna elements which are symmetrically arranged on the same side face of a substrate, a predetermined distance is maintained between the two antenna elements, and an isolating coupling structure is arranged between the two antenna elements. Preferably, both the two antenna elements are of composite right/left-handed (CRLH) transmission line structures, and the isolating coupling structure is of a Decoupling Line structure. The utility model also provides a communication terminal with the antenna device correspondingly. Thus, the MIMO antenna device can not only realize miniaturization of an antenna structure, but can also solve the problem of close-range coupling, thereby effectively utilizing the area of the communication terminal.

Description

MIMO antenna assembly and have the communication terminal of MIMO antenna assembly
Technical field
The utility model relates to communication technical field, relates in particular to a kind of MIMO antenna assembly and has the communication terminal of MIMO antenna assembly.
Background technology
Along with development of Communication Technique, the antenna technology of various communication terminals has also had very much progress, and integrated, the miniaturization of antenna is the antenna assembly inevitable development trend.For single antenna, referring to the existing antenna implementation of Figure 1A～Fig. 1 C all is to utilize the total length of antenna radiator and the relation of resonance frequency to realize basically, needs to satisfy the desired working frequency range of Antenna Design by the physical size of adjusting antenna radiator in specific design.For MIMO (Multiple-Input Multiple-Out-put) antenna, present existing scheme utilizes two stand-alone antennas to realize exactly, in conjunction with Fig. 2, adopts layout to handle isolation problem between two antennas away from mode.Resonance frequency is relevant with the physical size of antenna radiator, and the functional diversities of present intelligent terminal, it is fewer and feweri that the terminal slimming directly causes leaving for the limited environment of antenna, therefore, existing antenna scheme can't adapt to the development trend of following intelligent terminal, because existing implementation is higher to the cabling area requirements, more and more can't satisfy the development trend of present communication terminal.And for present MIMO antenna, monomer whose realizes that area is bigger, simultaneously, need also increase the required area of antenna cabling thus virtually by layout away from the isolation that realizes each other.
In summary, the antenna technology of existing communication terminal obviously exists inconvenience and defective, so be necessary to be improved on reality is used.
The utility model content
At above-mentioned defective, the communication terminal that the purpose of this utility model is to provide a kind of MIMO antenna assembly and has the MIMO antenna assembly can improve the isolation of antenna element, reduces the antenna area occupied.
To achieve these goals, the utility model provides a kind of MIMO antenna assembly, and described antenna assembly comprises at least two antenna elements, is symmetrically set in the same side of substrate, and keep preset distance between described two antenna elements, be provided with the isolation coupling structure between described two antenna elements.
According to MIMO antenna assembly of the present utility model, described two antenna elements are composite left-and-right-hand transmission line structure.
According to MIMO antenna assembly of the present utility model, described isolation coupling structure is a Decoupling Line structure.
According to MIMO antenna assembly of the present utility model, described antenna element comprises antenna holder, first antenna element, be positioned at second antenna element in described first antenna element left side and be positioned at the third antenna unit on the described first antenna element right side, and described antenna holder all is located in described first antenna element, second antenna element and third antenna unit.
According to MIMO antenna assembly of the present utility model, described second antenna element and described first antenna element form the Zero-order resonant antenna structure, and described third antenna unit also forms the Zero-order resonant antenna structure with described first antenna element.
According to MIMO antenna assembly of the present utility model, the described first antenna element inverted U monopole antenna, and be that the boundary is divided into vertical little band and the little band of level with the right angle.
According to MIMO antenna assembly of the present utility model, described second antenna element comprises:
First rectangular patch, second rectangular patch, the 3rd rectangular patch and the 4th rectangular patch of being close to described antenna holder;
First folding line, the first via hole paster of being close to described base lower surface; And
First metallic vias that connects the described first via hole paster and second rectangular patch.
According to MIMO antenna assembly of the present utility model, described third antenna unit comprises:
The 5th rectangular patch, the 6th rectangular patch and the 7th rectangular patch of being close to described antenna holder;
Second folding line, the second via hole paster of being close to described base lower surface; And
Second metallic vias that connects described the 6th rectangular patch and the second via hole paster.
The utility model also provides a kind of communication terminal of MIMO antenna assembly as mentioned above that comprises.
The utility model is by being symmetrically set in two antenna elements on the substrate, and two antenna elements press the preset distance setting, constitutes the antenna structure of symmetry whereby.Between two antenna elements of symmetry, be provided with the isolation coupling structure, can effectively solve effective isolating problem of two antenna elements.Better, antenna element adopts the CRLH structure, and the isolation coupling structure adopts Decoupling Line structure, not only makes the antenna structure miniaturization whereby, can also solve closely coupled problem, the area of more efficient use communication terminal.
Description of drawings
Figure 1A is the monomer structure antenna schematic diagram of an embodiment of the prior art;
Figure 1B is the plan structure schematic diagram of the antenna of monomer structure shown in Figure 1A;
Fig. 1 C is the perspective view of the antenna of monomer structure shown in Figure 1A;
Fig. 2 is the double-antenna structure schematic diagram of another embodiment of prior art;
Fig. 3 is the MIMO antenna device arrangement schematic diagram of the utility model one embodiment;
Fig. 4 is the MIMO antenna device arrangement schematic diagram of another embodiment of the utility model;
Fig. 5 is the substrate of the utility model one embodiment and the structural representation of antenna holder;
Fig. 6 is the MIMO antenna device arrangement schematic diagram of another embodiment of the utility model;
Fig. 7 is the polycrystalline substance schematic diagram of the antenna element of the utility model one embodiment;
Fig. 8 is the schematic equivalent circuit of the antenna element of the utility model one embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
For ease of understanding the utility model, in the implication of this explanation CRLH (DUAL BAND-COMPOSITE RIGHT/LEFT-HANDED, composite left-and-right-hand transmission line structure).The CRLH structure is a kind of plane left hand structure, has the zeroth order resonance response, that is to say, it is 0 that the antenna of this kind structure is implemented in the last electromagnetic phase constant of operating frequency point, is Zero-order resonant antenna so call this antenna again.
Referring to Fig. 3, the utility model provides a kind of MIMO antenna assembly, it comprises at least two antenna elements 11 as radiant body being located at substrate 10 same sides, described two antenna elements 11 are symmetricly set on the substrate 10 by preset distance, the concrete structure of each antenna element 11 can be in conjunction with shown in Figure 1B and Fig. 1 C, it has first antenna element 111, second antenna element 112 and third antenna unit 113, and first antenna element 111 is connected in the circuit of substrate 10 by a distributing point 114.
Concrete, in the present embodiment, antenna element 11 is the CRLH structure, it can be applied to LTE (Long Term Evolution, Long Term Evolution) technical field, is provided with an isolation coupling structure 12 between the antenna element 11 of two symmetries, these isolation coupling structure 12 preferred Decoupling Line structures that adopt, can solve the effective isolating problem between two antenna elements 11 whereby, the distance of two antenna elements is dwindled, reduce area occupied.Need illustrate that isolation coupling structure 12 can be different planforms according to different Demand Design, such as having different isolation coupling structures 12 in the MIMO antenna assembly shown in Figure 4.
Antenna element 11 of the present invention comprises an antenna holder 115, this antenna holder 115 all is located in first antenna element 111, second antenna element 112 and third antenna unit 113, and second antenna element 112 is positioned at first antenna element, 111 left sides, and third antenna unit 113 is positioned at the right side of first antenna element 111.
Concrete, antenna holder 115 is the cuboid that is positioned at the top left hand of medium substrate 10 upper surfaces, in conjunction with Fig. 5～Fig. 8, first antenna element 111 is the inverted U monopole antenna, is that the boundary is divided into vertical little band and the little band of level with the right angle.Wherein, its vertical little band is close to the P2 face of antenna holder 115, following termination distributing point 114, the little band of the described level of last termination; The little band of its level is close to the P4 face of antenna holder 115, and opening direction is inverted U towards the bending of P2 face direction, and left end connects described vertical little band, but these first antenna element, 111 design works are in the high band of radio communication.
Second antenna element 112 comprises first rectangular patch 1121, second rectangular patch 1122, the 3rd rectangular patch 1123 of being close to antenna holder 115P1 face of being close to antenna holder 115P4 face, the 4th rectangular patch 1124 of being close to antenna holder 115P5 face; First folding line 1125, the first via hole paster 1126 of being close to medium substrate 10 lower surfaces; And first metallic vias 1127 that connects the first via hole paster 1126 and second rectangular patch 1122.First rectangular patch, 1121 left ends and the 3rd rectangular patch 1123 join, and are the boundary with the right angle, and front end and the 4th rectangular patch 1124 join, and are the boundary with the right angle, and rear end and paster 2 join, right-hand member and the coupling of the described micro-strip oscillator of falling U.Second rectangular patch, 1122 lower surfaces and described first metallic vias 1127 are joined, and the front end and second rectangular patch 1122 join.First folding line 1125 is the right angle for bending angle, the microstrip line of bending joint length gradual change.Wherein: first folding line, 1,125 one end ground connection, the described first via hole paster 1126 of another termination; First metallic vias 1127 is positioned at antenna holder 115 rear ends left sides, and passes medium substrate 10 and antenna holder 115 upper ends and second rectangular patch 1122 and join, and the lower end and the first via hole paster 1126 join.
Preferably, second antenna element 112 and 111 couplings of first antenna element form a zeroth order resonance structure.Concrete, the little band of the inverted U of first antenna element 111 provides the right hand inductance L of connecting in the branch with second antenna element, 112 adjacent sides R1, provide the left hand capacitor C of connecting with the slit coupling of first rectangular patch 1121 on the P4 face L1 First folding line 1125 on first rectangular patch 1121 in second antenna element 112 on the P4 face and second rectangular patch 1122 and substrate 10 lower surfaces and the first via hole paster 1126 produce right hand capacitor C in parallel R1, first metallic vias 1127 forms left hand inductance L in parallel with first folding line 1125 L1, its equivalent circuit theory figure as shown in Figure 8.The present invention can change its equivalent composite left-and-right-hand electric capacity and inductance by changing the physical structure size of second antenna element 112, thereby changes the frequency of zeroth order resonance.Therefore, the zeroth order mode of resonance can effectively work in one or more working frequency range of radio communication, and as long as the optimal design by equivalent electric circuit, realize needed electric capacity and inductance value with undersized antenna unit structure, just can realize Zero-order resonant antenna, help excitation and mate low-frequency resonant better.
Third antenna unit 113 comprises the 5th rectangular patch 1131, the 6th rectangular patch 1132 that are close to antenna holder 115P4 face, is close to antenna holder 115P5 face the 6th rectangular patch 1133; Be close to second folding line 1134, the second via hole paster 1135 of medium substrate 10 lower surfaces; And connect second metallic vias 1136 of the 6th rectangular patch 1132 and the second via hole paster 1135.The 5th rectangular patch 1131 front ends and the 6th rectangular patch 1133 join, and are the boundary with the right angle, and rear end and the 6th rectangular patch 1132 join, left end and the micro-strip oscillator of falling L coupling.The 6th rectangular patch 1132 front ends and the 5th rectangular patch 1131 join, and the lower surface and second metallic vias 1136 are joined.Second folding line 1134 is the right angle for bending angle, the microstrip line of bending joint length gradual change, second folding line, 1,134 one end ground connection wherein, another termination second via hole paster 1135; Second metallic vias 1136 is positioned at right side, antenna holder 115 rear end, and passes described medium substrate 10 and antenna holder 115 upper ends and the 6th rectangular patch 1132 and join, and lower end and the described second via hole paster 1135 join.
Preferably, third antenna unit 113 and 111 couplings of first antenna element form another zeroth order resonance structure.Wherein, the little band of the inverted U of first antenna element 111 provides the right hand inductance L of connecting in the branch with third antenna unit 113 adjacent sides R2, provide the left hand capacitor C of connecting with the slit coupling of the 5th rectangular patch 1131 on the P4 face L2 Second folding line 1134 on the 5th rectangular patch 1131 in the third antenna unit 113 on the P4 face and the 6th rectangular patch 1132 and substrate 10 lower surfaces and the second via hole paster 1135 produce right hand capacitor C in parallel R2, second metallic vias 1136 forms left hand inductance L in parallel with second folding line 1134 L2, its equivalent circuit theory figure as shown in Figure 8.By changing the physical structure size of third antenna unit 113, can change its equivalent composite left-and-right-hand electric capacity and inductance, thereby change the frequency of zeroth order resonance.Therefore, this zeroth order mode of resonance can effectively work in one or more working frequency range of radio communication.
Specify design process of the present utility model below.
At first come designing antenna, in the middle of design, change the zeroth order resonance frequency, make it in the needs frequency range, to produce required resonance by physical structure change distributed capacitor and the distributed inductance value of adjusting radiant body by the CRLH structure.The antenna that duplicates said structure constitutes double-antenna structure, forms the MIMO antenna, is adopting Decoupling Line structure to strengthen the isolation of two antenna elements 11 in the middle of two antenna elements 11 then.
Need illustrate, a kind of reinforcement two isolation between antennas implementations that when MIMO two antenna elements 11 layouts are nearer, adopt, under intelligent terminal tolerance antenna arrangement situation far away, when fully satisfying insulation request, then needn't add this Decoupling Line structure.In the practical application, adopt Decoupling Line structure to realize that isolation is exactly in fact the coupling path that has changed between two antenna elements 11, by utilizing the space coupling phase shift between complementary two antennas of Decoupling Line structure introducing phase place in-migration, reach the decoupling purpose with this, realize the isolation between the reinforcement antenna.Concrete operation principle is as follows: in MIMO antenna coupling path, the space, near field is coupled as main cause, and electromagnetic space phase was moved and was roughly θ 0=Klptop=2 π lptop/ λ this moment; When introducing Decoupling Line structural design, just between antenna, produced a new antenna coupling path, phase shift that introduce this moment and original space phase are moved and are formed the complementary coupling effect that reduces greatly between two antennas, this moment Δ θ=θ 1-θ 0=2 π (1DL-lptop)/λ, by rational design Decoupling Line design length, make Δ θ ≈ π, just reached the purpose of decoupling, also just realized strengthening the effect of isolation.
The utility model also provides a kind of communication terminal that comprises above-mentioned MIMO antenna assembly accordingly, its can but be not limited to intelligent terminal, the MIMO antenna assembly of miniaturization is applied to the area occupied that communication terminal can reduce antenna greatly, and can guarantee the superperformance of antenna.
In sum, the utility model is by being symmetrically set in two antenna elements on the substrate, and two antenna elements press the preset distance setting, constitutes the antenna structure of symmetry whereby.Between two antenna elements of symmetry, be provided with the isolation coupling structure, can effectively solve effective isolating problem of two antenna elements.Better, antenna element adopts the CRLH structure, and the isolation coupling structure adopts Decoupling Line structure, not only makes the antenna structure miniaturization whereby, can also solve closely coupled problem, the area of more efficient use communication terminal.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.

Claims (9)

1. a MIMO antenna assembly is characterized in that, described antenna assembly comprises at least two antenna elements, is symmetrically set in the same side of substrate, and keeps preset distance between described two antenna elements, is provided with the isolation coupling structure between described two antenna elements.
2. MIMO antenna assembly according to claim 1 is characterized in that, described two antenna elements are composite left-and-right-hand transmission line structure.
3. MIMO antenna assembly according to claim 1 is characterized in that, described isolation coupling structure is a Decoupling Line structure.
4. MIMO antenna assembly according to claim 1, it is characterized in that, described antenna element comprises antenna holder, first antenna element, be positioned at second antenna element in described first antenna element left side and be positioned at the third antenna unit on the described first antenna element right side, and described antenna holder all is located in described first antenna element, second antenna element and third antenna unit.
5. MIMO antenna assembly according to claim 4 is characterized in that, described second antenna element and described first antenna element form the Zero-order resonant antenna structure, and described third antenna unit also forms the Zero-order resonant antenna structure with described first antenna element.
6. MIMO antenna assembly according to claim 5 is characterized in that, the described first antenna element inverted U monopole antenna, and be that the boundary is divided into vertical little band and the little band of level with the right angle.
7. MIMO antenna assembly according to claim 4 is characterized in that, described second antenna element comprises:
First rectangular patch, second rectangular patch, the 3rd rectangular patch and the 4th rectangular patch of being close to described antenna holder;
First folding line, the first via hole paster of being close to described base lower surface; And
First metallic vias that connects the described first via hole paster and second rectangular patch.
8. MIMO antenna assembly according to claim 4 is characterized in that, described third antenna unit comprises:
The 5th rectangular patch, the 6th rectangular patch and the 7th rectangular patch of being close to described antenna holder;
Second folding line, the second via hole paster of being close to described base lower surface; And
Second metallic vias that connects described the 6th rectangular patch and the second via hole paster.
9. one kind comprises the communication terminal as claim 1～8 MIMO antenna assembly as described in each.
CN 201220504586 2012-09-27 2012-09-27 MIMO antenna device and communication terminal with MIMO antenna device Expired - Lifetime CN203103510U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105140623A (en) * 2015-07-23 2015-12-09 广东欧珀移动通信有限公司 Antenna system and communication terminal employing same
CN105428808A (en) * 2015-12-09 2016-03-23 广东欧珀移动通信有限公司 Antenna and terminal for transmitting and/or receiving multi-frequency-range wireless signals
CN105846078A (en) * 2016-05-23 2016-08-10 北京技德网络技术有限公司 A new method for improving isolation between different antennas of radio equipment
WO2016145596A1 (en) * 2015-03-16 2016-09-22 华为技术有限公司 Mimo antenna having adjustable decoupling structure
CN106450741A (en) * 2016-12-09 2017-02-22 广东工业大学 Multi-frequency-band LTE (long term evolution) antenna using novel impedance matching structure
CN107623176A (en) * 2017-08-18 2018-01-23 上海安费诺永亿通讯电子有限公司 terminal MIMO antenna system
WO2018157661A1 (en) * 2017-02-28 2018-09-07 中兴通讯股份有限公司 Antenna and terminal
CN109088168A (en) * 2018-06-26 2018-12-25 中兴通讯股份有限公司 A kind of mobile terminal antenna and mobile terminal
CN109314313A (en) * 2016-06-14 2019-02-05 三菱电机株式会社 Array antenna device
CN109546337A (en) * 2018-11-13 2019-03-29 北京理工大学 A kind of compact 5G mobile terminal mimo antenna
CN109616760A (en) * 2018-12-05 2019-04-12 歌尔股份有限公司 Antenna assembly and mobile terminal device
CN110828999A (en) * 2019-11-19 2020-02-21 榆林学院 Dual-frequency dual-polarization two-unit MIMO antenna based on composite left-right hand transmission line structure

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106233531A (en) * 2015-03-16 2016-12-14 华为技术有限公司 There is the mimo antenna of adjustable decoupling arrangements
US10374306B2 (en) 2015-03-16 2019-08-06 Huawei Technologies Co., Ltd. MIMO antenna having adjustable decoupling structure
CN106233531B (en) * 2015-03-16 2019-05-10 华为技术有限公司 Mimo antenna with adjustable decoupling arrangements
WO2016145596A1 (en) * 2015-03-16 2016-09-22 华为技术有限公司 Mimo antenna having adjustable decoupling structure
CN105140623B (en) * 2015-07-23 2018-03-27 广东欧珀移动通信有限公司 The communication terminal of antenna system and the application antenna system
CN105140623A (en) * 2015-07-23 2015-12-09 广东欧珀移动通信有限公司 Antenna system and communication terminal employing same
CN105428808B (en) * 2015-12-09 2018-01-19 广东欧珀移动通信有限公司 A kind of antenna and terminal for receiving and dispatching multiband wireless signal
CN105428808A (en) * 2015-12-09 2016-03-23 广东欧珀移动通信有限公司 Antenna and terminal for transmitting and/or receiving multi-frequency-range wireless signals
CN105846078A (en) * 2016-05-23 2016-08-10 北京技德网络技术有限公司 A new method for improving isolation between different antennas of radio equipment
CN109314313A (en) * 2016-06-14 2019-02-05 三菱电机株式会社 Array antenna device
CN106450741A (en) * 2016-12-09 2017-02-22 广东工业大学 Multi-frequency-band LTE (long term evolution) antenna using novel impedance matching structure
CN106450741B (en) * 2016-12-09 2023-05-05 广东工业大学 Multi-frequency LTE antenna adopting novel impedance matching structure
WO2018157661A1 (en) * 2017-02-28 2018-09-07 中兴通讯股份有限公司 Antenna and terminal
CN107623176A (en) * 2017-08-18 2018-01-23 上海安费诺永亿通讯电子有限公司 terminal MIMO antenna system
CN109088168A (en) * 2018-06-26 2018-12-25 中兴通讯股份有限公司 A kind of mobile terminal antenna and mobile terminal
CN109546337A (en) * 2018-11-13 2019-03-29 北京理工大学 A kind of compact 5G mobile terminal mimo antenna
CN109546337B (en) * 2018-11-13 2020-11-10 北京理工大学 Compact 5G mobile terminal MIMO antenna
CN109616760A (en) * 2018-12-05 2019-04-12 歌尔股份有限公司 Antenna assembly and mobile terminal device
CN110828999A (en) * 2019-11-19 2020-02-21 榆林学院 Dual-frequency dual-polarization two-unit MIMO antenna based on composite left-right hand transmission line structure

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