CN102931474A - Antenna element and multiple-input multiple-output (MIMO) antenna device - Google Patents

Antenna element and multiple-input multiple-output (MIMO) antenna device Download PDF

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Publication number
CN102931474A
CN102931474A CN201110228657XA CN201110228657A CN102931474A CN 102931474 A CN102931474 A CN 102931474A CN 201110228657X A CN201110228657X A CN 201110228657XA CN 201110228657 A CN201110228657 A CN 201110228657A CN 102931474 A CN102931474 A CN 102931474A
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antenna
antenna element
metal structure
mimo
medium substrate
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CN102931474B (en
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刘若鹏
徐冠雄
方能辉
李岳峰
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Kuang Chi Institute of Advanced Technology
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Kuang Chi Institute of Advanced Technology
Kuang Chi Innovative Technology Ltd
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Priority to TW100135534A priority patent/TWI487199B/en
Priority to PCT/CN2011/080553 priority patent/WO2013020321A1/en
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Abstract

The invention relates to an antenna element. The antenna element comprises a dielectric substrate and at least two antenna units arranged on the dielectric substrate, wherein each antenna unit comprises a feed unit, grounding units arranged on the two sides of the feed unit, a feed line connected with the feed unit, and a metal structure; the feed line is coupled with the metal structure through an electric signal; and at least two antenna units have at least two electromagnetic wave resonant communication frequency ranges. A related electromagnetic wave resonant response metal structure library is made of a manual electromagnetic material, and the structures are small compared with the traditional antenna structure, so that the physical size of antennae is not limited by the physical length of half-wavelength; the corresponding antenna units are made on the basis of the metal structures; and the information sending or receiving throughput of a plurality of antenna units is improved on the basis of an MIMO technology.

Description

Antenna element and MIMO antenna assembly
Technical field
The present invention relates to communication antenna, more particularly, relate to a kind of antenna element and comprise antenna element MIMO (Multiple-Input Multiple-Out-put) antenna assembly.
Background technology
Along with the high development of semiconductor technology, current electronic system integrated level has been proposed more and more higher requirement, the miniaturization of device becomes the technical problem that whole industry is paid special attention to.Yet, be different from the development that the IC chip is followed " Moore's Law ", as other important composition---the radio-frequency module of electronic system, but be faced with the highly difficult technological challenge of device miniaturization.Radio-frequency module has mainly comprised the main devices such as mixing, power amplifier, filtering, radio signal transmission, matching network and antenna.Wherein, antenna is as radiating element and the receiving device of final radiofrequency signal, and its operating characteristic will directly affect the service behaviour of whole electronic system.Yet the important indicators such as the size of antenna, bandwidth, gain but have been subject to the restriction (gain margin under the fixed dimension, bandwidth limit etc.) of basic physical principle.The basic principle of these index limit so that the miniaturization technology difficulty of antenna considerably beyond other device, and because the complexity of the electromagnetic field analysis of radio-frequency devices, approaching these limiting values all becomes huge technological challenge.Such as, traditional terminal communication antenna mainly designs based on the radiation theory of electric monopole or dipole, the most frequently used planar inverted-F antenna (PIFA).The Radiation work frequency of traditional antenna directly and the size positive correlation of antenna, the area positive correlation of bandwidth and antenna is so that the design of antenna needs the physical length of half-wavelength usually.
The advantage of multi-input multi-output system (MIMO) technology is can increase wireless range and improve performance.So-called MIMO refers to that wireless network signal receives and dispatches synchronously by multiple antenna, so can increase the data transmission rate.The high speed development of multi-input multi-output system (MIMO) in radio communication, wireless data service field further required harshly the miniaturization of antenna size and guaranteed simultaneously good isolation, radiance and antijamming capability.The channel capacity of this moment is linear the increase along with the increase of antenna amount.That is to say and can utilize mimo channel to improve exponentially the wireless channel capacity, in the situation that does not increase bandwidth and antenna transmitted power, the availability of frequency spectrum can improve exponentially.
Summary of the invention
The technical problem to be solved in the present invention is, break through the framework of traditional antenna design, save the somewhat complex design of impedance matching network, guarantee its miniaturization, can be applied among the size-constrained wireless communication apparatus, and the aerial radiation area utilization is high, antijamming capability is strong.Therefore, the invention provides a kind of antenna element and use the MIMO antenna assembly of this antenna element.
A kind of antenna element comprises a medium substrate and at least two antenna elements that are arranged on the medium substrate; Feeder line and a metal structure that described antenna element comprises a feed element, is arranged at the ground unit of feed element both sides, is connected with this feed element, the mutual signal of telecommunication of feeder line and metal structure is of coupled connections; Described at least two antenna elements make the electromagnetic wave resonance of two different communication frequency bands at least.
Further, separate being arranged on the medium substrate of described at least two antenna elements.
Further, described two antenna element quantity are two.
Further, described feed element, ground unit, feeder line and a metal structure all adopt copper product to make.
Further, the Signal segregation degree maximum is arranged on the medium substrate between described two antenna elements.
Further, the metal structure in described two antenna elements is identical.
Further, the metal structure in described two antenna elements is a pair of complementary metal structure.
Further, described medium substrate adopts dielectric material to make.
Further, can establish by metallized through hole on the described ground unit.
A kind of MIMO antenna assembly comprises switch unit and MIMO modulation-demodulation circuit, and the MIMO modulation-demodulation circuit receives the signal of telecommunication of described antenna element and transmits the signal of telecommunication to described antenna element by switch unit.
Adopt the artificial electromagnetic material Technology design to go out associated electrical magnetic wave resonance response metal structure storehouse, the antenna structure that these physical dimensions are relatively traditional is less, so that the physical size of antenna is not limited by the physical length of half-wavelength; Choose according to application product after the metal structure of impedance matching and by constantly screening, test and adjust, finally optimize the metal structure that screening is fit to, so that selected metal structure makes the electromagnetic wave resonance of two kinds of different wave lengths at least, thereby based on the corresponding antenna element of above-mentioned Metal Structure Design; Then improve many antenna elements based on the MIMO technology and send or receive information throughput.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is MIMO antenna assembly module diagram of the present invention;
Fig. 2 is the structural representation of antenna element one specific embodiment shown in Figure 1;
Fig. 3 is the structural representation of another specific embodiment of antenna element shown in Figure 1;
Fig. 4 is the structural representation of antenna element the 3rd specific embodiment shown in Figure 1;
Fig. 5 is an execution mode schematic diagram of antenna element in the antenna element shown in Fig. 2,3 and 4;
Fig. 6 is another execution mode schematic diagram of antenna element in the antenna element shown in Fig. 2,3 and 4;
Fig. 7 is the 3rd execution mode schematic diagram of antenna element in the antenna element shown in Fig. 2,3 and 4;
Fig. 8 is the present invention one complementary antenna cellular construction figure;
Fig. 9 is that antenna element of the present invention comprises a pair of complementary antenna cellular construction figure.
Figure 10 is that antenna element of the present invention comprises two complementary antenna cellular construction figure shown in Figure 8.
Embodiment
The present invention will be further described below in conjunction with drawings and the specific embodiments:
See also Fig. 1, described MIMO antenna assembly comprises an antenna element 12, switch unit 19 and MIMO modulation-demodulation circuit 18.Described antenna element 12 comprises two antenna elements 10, and the distributing point of each antenna element 10 stretches out into pin, and each antenna element 10 is connected with switch unit 19 one by one by described pin; MIMO modulation-demodulation circuit 18 receives the signal of telecommunication of described at least two antenna elements 10 and transmits the signal of telecommunication to described at least two antenna elements 10 by switch unit 19.
See also Fig. 2, be the structural representation of described antenna element one specific embodiment.Described antenna element 12 comprises a medium substrate 7 and is arranged at medium substrate 7 one lip-deep two antenna elements 10.Two antenna elements, 10 separate being arranged on the medium substrate 7.
Feeder line 4 and a metal structure 6 that antenna element 10 comprises a feed element 5, is arranged at the ground unit 8 of feed element 5 both sides, is connected with this feed element 5.Wherein feeder line 4 is of coupled connections with the metal structure 6 mutual signals of telecommunication; Described metal structure 6 is for adopting the artificial electromagnetic material mode to design; Described artificial electromagnetic material is arranged on the media substrate according to ad hoc fashion by the artificial metal's conducting strip with certain pattern form.The material of medium substrate can be selected the dielectric materials such as air, pottery, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.Thereby the different pattern form of artificial metal's conducting strip with arrangement mode so that super material have different dielectric constants with different magnetic permeabilitys so that super material has different electromagnetic responses.Wherein, when this artificial metal's conducting strip is in resonance band, this artificial metal's conducting strip will show the dispersion characteristics of height, and the dispersion characteristics of so-called height refer to the impedance of this artificial metal's conducting strip, hold perception, equivalent dielectric constant and magnetic permeability be along with violent variation can occur frequency.In the present embodiment, described metal structure 6 is axial symmetry metal structure figure, and two corresponding resonance band are 2.4GHz-2.49GHz and 4.9G-5.9GHz.Wherein metal structure 6 is made for copper or ag material.Be preferably copper, cheap, conduct electricity very well.In order to realize better impedance matching, metal structure 12 also is copper and silver combination.
In the present embodiment, phase mutual interference when working for reducing by two antenna elements 10, make feeder line 4 length of two antenna elements 10 unequal, and then so that the 10 Heterogeneous Permutation settings of two antenna elements so that two antenna elements inhibit signal maximum isolation degree on medium substrate 7.Slightly be wider than the feeder line 4 of other parts in the feeder line 4 of ground unit 8 packet portions folders, and feeder line 4 one ends arrange one and are used for receiving signal of telecommunication feed element 5.In the present embodiment, feed element 5 is one to cover copper cash.
Described ground unit 8 arranges width and length according to feeder line 4.In the present embodiment, because two antenna elements, 10 Heterogeneous Permutations, therefore the shape ground unit of two antenna elements, 10 correspondences.
See also Fig. 3, be the structural representation of described another specific embodiment of antenna element.Can establish by metallized through hole 81 on the ground unit 8 of described each antenna element 10.
See also Fig. 4, be the structural representation of described antenna element preferred embodiment.Be arranged at perforation 82 on the vacant part of described medium substrate 7, described perforation 82 purposes can alleviate product weight and help to cooperate the electronic equipment of its application to dispel the heat.
Please in the lump with reference to figure 5, Fig. 6 and Fig. 7, signal feed-in mode can be multiple between described feeder line 4 and the metal structure 6.As shown in Figure 5, described feeder line 4 directly links to each other with described metal structure 6; And described feeder line 4 and the connecting point position that links to each other of metal structure 6 can be positioned at the optional position on the metal structure 6.Shown in Fig. 6 and 7, the end that feeder line 4 adopts the encirclement modes to be arranged at described metal structure 6 peripheries and feeder line 4 is arranged at metal structure 6 peripheral optional positions.
See also Fig. 8, be the antenna unit structure figure of another embodiment of the present invention complementary metal structure.Metal structure 6 ' in the described antenna element 10 ' forms complementary with above-mentioned execution mode metal structure 6.That is to say, be cut into two parts by a complete sheet sheet metal, be i.e. metal structure 6 and complementary metal structure 6 ' two parts.
Adhesion metal structure 6 or complementary metal structure 6 ' and feeder line 4 and distributing point 5 on the medium substrate 7, thus antenna element 10 of the present invention formed.In the present embodiment, two identical metal structure 6 ' and corresponding feeder line 4 and distributing points 5 are arranged on the same medium substrate 7, that is to say, two antenna elements 10 are arranged at form an antenna element 12 on the same medium substrate 7.Described antenna element 12 can be plugged in the wireless communication apparatus that comprises two resonance band (for example 2.4GHz-2.49GHz and 4.9G-5.9GHz) by interface.And the mode of described metal structure 6 and feeder line 4 can be identical, also can be different, revise feeding classification according to the test optimum efficiency of last MIMO antenna assembly.In the present embodiment, described metal structure 6 all adopts non-direct electric connection mode, i.e. signal of telecommunication inductance capacitance mode feed-in with feeder line 4.
See also Fig. 9, for antenna element comprises a pair of complementary antenna cellular construction figure.Metal structure 6 and 6 ' two kinds of mutual complementary metal structures 6 of complementary metal structure are arranged at formation one antenna element on the same medium substrate 7.Certainly, shape is identical complementary metal structure 6 ' is arranged at also can form antenna element of the present invention (as shown in figure 10) on the same medium substrate 7.
Present embodiment utilizes the characteristic of artificial electromagnetic material, the mode of metal structure 6 is engraved in employing at sheet metal, form an effective dielectric constant according to the electromagnetic material of Lorentz lorentz's material resonances model dispersion so that metal structure 6 and the medium that depends on metal structure are common, thereby design the shake antenna of frequency range of multi resonant.In the present embodiment, shown in Fig. 2,3,4,9 and 10 antenna element 12 to can be used for operating frequency be in 2.4GHz and the 5.8GHz wireless communication apparatus.
In the present embodiment, about the processing and manufacturing of antenna element 12, as long as satisfy design principle of the present invention, can adopt various manufactures.Prevailing method is to use the manufacture method of all kinds of printed circuit board (PCB)s (PCB), and the PCB that covers copper makes and all can satisfy processing request of the present invention.Also above-mentioned shape metal structure 6, feeder line 4 and distributing point 5 all can be printed on the FPC plate in addition.
Except above-mentioned processing mode, can also introduce according to the actual needs other manufacturing process, but such as the flexible PCB processing of conductive silver paste printing ink processing mode, all kinds of deformation devices, the processing mode of iron plate antenna and the processing mode of iron plate and PCB combination.Wherein, iron plate and PCB combination processing mode refer to utilize the accurate processing of PCB to finish the processing partly of chip micro-structural, finish other slave part with iron plate.Owing to adopt cheaply that copper product forms described metal structure 6, thus oxidized and antenna element resonance frequency shift or performance are sharply descended easily in the exposure air, so be provided with nonmetallic anti-oxidation film on antenna element 12 surfaces.Because all based on designing in metal structure 6, therefore, the lead-in wire of feeder line 4 affects less to the radiation frequency of antenna element to main performance of the present invention.
The above is described embodiments of the invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.

Claims (10)

1. an antenna element is characterized in that, described antenna element comprises a medium substrate and at least two antenna elements that are arranged on the medium substrate; Feeder line and a metal structure that described antenna element comprises a feed element, is arranged at the ground unit of feed element both sides, is connected with this feed element, the mutual signal of telecommunication of feeder line and metal structure is of coupled connections; Described at least two antenna elements make the electromagnetic wave resonance of two different communication frequency bands at least.
2. antenna element according to claim 1 is characterized in that, separate being arranged on the medium substrate of described at least two antenna elements.
3. antenna element according to claim 2 is characterized in that, described two antenna element quantity are two.
4. antenna element according to claim 3 is characterized in that, described feed element, ground unit, feeder line and a metal structure all adopt copper product to make.
5. antenna element according to claim 3 is characterized in that, the Signal segregation degree maximum is arranged on the medium substrate between described two antenna elements.
6. antenna element according to claim 3 is characterized in that, the metal structure in described two antenna elements is identical.
7. antenna element according to claim 3 is characterized in that, the metal structure in described two antenna elements is a pair of complementary metal structure.
8. antenna element according to claim 1 is characterized in that, described medium substrate adopts dielectric material to make.
9. antenna element according to claim 1 is characterized in that, can establish by metallized through hole on the described ground unit.
10. MIMO antenna assembly that comprises the antenna element in claim 1 to 9 any one, it is characterized in that, the MIMO antenna assembly comprises switch unit and MIMO modulation-demodulation circuit, and the MIMO modulation-demodulation circuit receives the signal of telecommunication of described antenna element and transmits the signal of telecommunication to described antenna element by switch unit.
CN201110228657.XA 2011-08-10 2011-08-10 Antenna element and mimo antenna device Active CN102931474B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201110228657.XA CN102931474B (en) 2011-08-10 2011-08-10 Antenna element and mimo antenna device
TW100135534A TWI487199B (en) 2011-08-10 2011-09-30 Dual-band antenna, mimo antenna device and dual-band wireless communication device
PCT/CN2011/080553 WO2013020321A1 (en) 2011-08-10 2011-10-08 Dual-frequency antenna, mimo antenna device and 2.4ghz/5.8ghz dual-frequency wireless communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110228657.XA CN102931474B (en) 2011-08-10 2011-08-10 Antenna element and mimo antenna device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103441327A (en) * 2013-08-28 2013-12-11 电子科技大学 Multi-notch ultra wide band antenna
WO2014161327A1 (en) * 2013-07-17 2014-10-09 中兴通讯股份有限公司 Mimo antenna, terminal and method for increasing isolation therefor

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CN101740862A (en) * 2008-11-20 2010-06-16 东莞市启汉电子科技有限公司 Dipole antenna of RF chip
CN102005645A (en) * 2010-12-02 2011-04-06 哈尔滨工程大学 Miniaturized dual-frequency antenna
CN202231145U (en) * 2011-08-10 2012-05-23 深圳光启高等理工研究院 Antenna element and mimo antenna device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1588693A (en) * 2004-09-23 2005-03-02 上海交通大学 Small wide frequency printed single pole antenna
CN1972008A (en) * 2005-11-24 2007-05-30 脉冲芬兰有限公司 Multiband antenna component
CN2865039Y (en) * 2006-01-23 2007-01-31 汉达精密电子(昆山)有限公司 Plane bifrequency antenna
CN101499841A (en) * 2008-01-29 2009-08-05 松下电器产业株式会社 Mimo antenna apparatus changing antenna elements based on transmission capacity
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014161327A1 (en) * 2013-07-17 2014-10-09 中兴通讯股份有限公司 Mimo antenna, terminal and method for increasing isolation therefor
US9601826B2 (en) 2013-07-17 2017-03-21 Zte Corporation MIMO antenna, terminal and method for improving isolation
CN103441327A (en) * 2013-08-28 2013-12-11 电子科技大学 Multi-notch ultra wide band antenna
CN103441327B (en) * 2013-08-28 2015-05-27 电子科技大学 Multi-notch ultra wide band antenna

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