CN102931474B - Antenna element and mimo antenna device - Google Patents
Antenna element and mimo antenna device Download PDFInfo
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- CN102931474B CN102931474B CN201110228657.XA CN201110228657A CN102931474B CN 102931474 B CN102931474 B CN 102931474B CN 201110228657 A CN201110228657 A CN 201110228657A CN 102931474 B CN102931474 B CN 102931474B
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Abstract
A kind of antenna element comprises a medium substrate and is arranged at least two antenna elements on medium substrate; Described antenna element comprises a feed element, be arranged at the ground unit of feed element both sides, the feeder line that is connected with this feed element and a metal structure, and feeder line is connected with the mutual coupling electrical signals of metal structure; Described at least two antenna elements at least make the electromagnetic wave resonance of two different communication frequency bands.Adopt artificial electromagnetic material Technology design to go out relevant electromagnetic wave resonance response metal structure storehouse, the antenna structure that these physical dimensions are relatively traditional is less, and the physical size of antenna is not limited by the physical length of half-wavelength; Based on the corresponding antenna element of above-mentioned Metal Structure Design; Then improve multi-antenna-unit based on MIMO technology send or receive information throughput.
Description
Technical field
The present invention relates to communication antenna, more particularly, relate to a kind of antenna element and comprise antenna element MIMO (Multiple-InputMultiple-Out-put) antenna assembly.
Background technology
Along with the high development of semiconductor technology, propose more and more higher requirement to current electronic system integrated level, the miniaturization of device becomes the technical problem that whole industry is paid special attention to.But, be different from the development that IC chip follows " Moore's Law ", as other important composition---the radio-frequency module of electronic system, be but faced with the highly difficult technological challenge of device miniaturization.Radio-frequency module mainly includes the main devices such as mixing, power amplifier, filtering, radio signal transmission, matching network and antenna.Wherein, antenna is as the radiating element of final radiofrequency signal and receiving device, and its operating characteristic will directly affect the service behaviour of whole electronic system.But the important indicator such as the size of antenna, bandwidth, gain but receives the restriction (gain margin under fixed dimension, bandwidth limit etc.) of basic physical principle.The general principle of these index limit makes the miniaturization technology difficulty of antenna considerably beyond other device, and the complexity of electromagnetic field analysis due to 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).Directly and the size positive correlation of antenna, the area positive correlation of bandwidth sum antenna, makes the design of antenna usually need the physical length of half-wavelength for the Radiation work frequency of traditional antenna.
The advantage of multi-input multi-output system (MIMO) technology can increase wireless range and improve performance.So-called MIMO refers to that wireless network signal is is synchronously received and dispatched by multiple antenna, so can increase data transmission rate.The high speed development of multi-input multi-output system (MIMO) in radio communication, wireless data service field further require that the miniaturized of antenna size harshly and ensures good isolation, radiance and antijamming capability simultaneously.Channel capacity now linearly increases along with the increase of antenna amount.That is mimo channel can be utilized to improve radio channel capacity exponentially, and when not increasing bandwidth sum 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, ensure that it is miniaturized, can be applied among size-constrained wireless communication apparatus, and aerial radiation area utilization is high, antijamming capability is strong.Therefore, the invention provides a kind of antenna element and apply the MIMO antenna device of this antenna element.
A kind of antenna element comprises a medium substrate and is arranged at least two antenna elements on medium substrate; Described antenna element comprises a feed element, be arranged at the ground unit of feed element both sides, the feeder line that is connected with this feed element and a metal structure, and feeder line is connected with the mutual coupling electrical signals of metal structure; Described at least two antenna elements at least make the electromagnetic wave resonance of two different communication frequency bands.
Further, described at least two antenna elements are separate is arranged on medium substrate.
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, between described two antenna elements, Signal segregation degree is maximum is arranged on medium substrate.
Further, the metal structure in described two antenna elements is identical.
Further, the metal structure in described two antenna elements is a pair complementary metal structure.
Further, described medium substrate adopts dielectric material to make.
Further, described ground unit can be established by metallized through hole.
A kind of MIMO antenna device comprises switch unit and MIMO modulation-demodulation circuit, and MIMO modulation-demodulation circuit receives the signal of telecommunication of described antenna element by switch unit and transmits the signal of telecommunication to described antenna element.
Adopt artificial electromagnetic material Technology design to go out relevant electromagnetic wave resonance response metal structure storehouse, the antenna structure that these physical dimensions are relatively traditional is less, and the physical size of antenna is not limited by the physical length of half-wavelength; Also by constantly screening, test and adjusting choose the metal structure of impedance matching according to application product after, finally carry out the metal structure that optimal screening is applicable to, selected metal structure is made at least to make the electromagnetic wave resonance of two kinds of different wave lengths, thus based on the corresponding antenna element of above-mentioned Metal Structure Design; Then improve multi-antenna-unit based on MIMO technology send or receive information throughput.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is MIMO antenna device module diagram of the present invention;
Fig. 2 is the structural representation of the specific embodiment of antenna element one shown in Fig. 1;
Fig. 3 is the structural representation of another specific embodiment of antenna element shown in Fig. 1;
Fig. 4 is the structural representation of antenna element shown in Fig. 1 the 3rd specific embodiment;
Fig. 5 is Fig. 2, an execution mode schematic diagram of antenna element in antenna element shown in 3 and 4;
Fig. 6 is Fig. 2, another execution mode schematic diagram of antenna element in antenna element shown in 3 and 4;
Fig. 7 is Fig. 2, the 3rd execution mode schematic diagram of antenna element in antenna element shown in 3 and 4;
Fig. 8 is the present invention one complementary antenna cellular construction figure;
Fig. 9 is that inventive antenna element comprises a pair complementary antenna cellular construction figure.
Figure 10 comprises complementary antenna cellular construction figure shown in two Fig. 8 for inventive antenna element.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be further described:
Refer to Fig. 1, described MIMO antenna device 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; The signal of telecommunication and the transmission signal of telecommunication of at least two antenna elements 10 described in MIMO modulation-demodulation circuit 18 is received by switch unit 19 give described at least two antenna elements 10.
Referring to Fig. 2, is the structural representation of described antenna element one specific embodiment.Two antenna elements 10 that described antenna element 12 comprises a medium substrate 7 and is arranged on medium substrate 7 one surface.Two antenna elements 10 are separate to be arranged on medium substrate 7.
Antenna element 10 comprises a feed element 5, be arranged at the ground unit 8 of feed element 5 both sides, the feeder line 4 that is connected with this feed element 5 and a metal structure 6.Wherein feeder line 4 and the mutual coupling electrical signals of metal structure 6 are connected; Described metal structure 6 is for adopting artificial electromagnetic material patten's design; Described artificial electromagnetic material is arranged in media substrate according to ad hoc fashion by artificial metal's conducting strip with certain pattern form.The material of medium substrate can select the dielectric materials such as air, pottery, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.The pattern form that artificial metal's conducting strip is different and arrangement mode make Meta Materials have different dielectric constants and different magnetic permeabilitys thus make Meta Materials have 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 along with frequency, and violent change can occur.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 is also copper and silver combination.
In the present embodiment, mutually disturb for reducing when two antenna elements 10 work, make feeder line 4 length of two antenna elements 10 unequal, and then two antenna element 10 Heterogeneous Permutations are arranged to make two antenna elements inhibit signal maximum isolation degree on medium substrate 7.In the feeder line 4 of ground unit 8 packet portion folder slightly wider than the feeder line 4 of other parts, and feeder line 4 one end arranges one for receiving signal of telecommunication feed element 5.In the present embodiment, feed element 5 is one cover copper cash.
Described ground unit 8 arranges width and length according to feeder line 4.In the present embodiment, due to two antenna element 10 Heterogeneous Permutations, the therefore shaped ground unit of two antenna element 10 correspondences.
Referring to Fig. 3, is the structural representation of described another specific embodiment of antenna element.The ground unit 8 of each antenna element 10 described can be established by metallized through hole 81.
Referring to Fig. 4, is the structural representation of described antenna element preferred embodiment.The rest of described medium substrate 7 is arranged at perforation 82, and described perforation 82 object can alleviate product weight and the electronic equipment that contributes to coordinating it to apply dispels the heat.
Please also refer to Fig. 5, Fig. 6 and Fig. 7, between described feeder line 4 and metal structure 6, signal feed-in mode can be multiple.As shown in Figure 5, described feeder line 4 is directly connected with described metal structure 6; And described feeder line 4 can be positioned at the optional position in metal structure 6 with the connecting point position that is connected of metal structure 6.As shown in Figures 6 and 7, feeder line 4 adopts encirclement mode to be arranged at described metal structure 6 is peripheral and the end of feeder line 4 is arranged at the peripheral optional position of metal structure 6.
Referring to Fig. 8, is the antenna unit structure figure of another embodiment of the present invention complementary metal structure.Metal structure 6 ' in described antenna element 10 ' forms complementation with above-mentioned execution mode metal structure 6.That is, two parts are cut into, i.e. metal structure 6 and complementary metal structure 6 ' two parts by a complete sheet sheet metal.
Adhesion metal structure 6 or complementary metal structure 6 ' and feeder line 4 and distributing point 5 on medium substrate 7, thus form antenna element 10 of the present invention.In present embodiment, the feeder line 4 of two identical metal structures 6 ' and correspondence and distributing point 5 are arranged on same medium substrate 7, that is, two antenna elements 10 are arranged on same medium substrate 7 and form an antenna element 12.Described antenna element 12 is plugged in the wireless communication apparatus comprising two resonance band (such as 2.4GHz-2.49GHz and 4.9G-5.9GHz) by interface.And described metal structure 6 and the mode of feeder line 4 can be identical, also can be different, the test optimum efficiency according to last MIMO antenna device revises feeding classification.In the present embodiment, described metal structure 6 all adopts indirect electrical connection mode, i.e. signal of telecommunication inductance capacitance mode feed-in with feeder line 4.
Refer to Fig. 9, for antenna element comprises a pair complementary antenna cellular construction figure.Metal structure 6 and the mutual complementary metal structure 6 of 6 ' two kinds, complementary metal structure are arranged on same medium substrate 7 and form an antenna element.Certainly, complementary metal structure 6 ' identical for shape is arranged on same medium substrate 7 also can forms antenna element of the present invention (as shown in Figure 10).
The present embodiment utilizes the characteristic of artificial electromagnetic material, adopt the mode of engraving into metal structure 6 on sheet metal, make metal structure 6 and jointly form the electromagnetic material of an effective dielectric constant according to the dispersion of Lorentz lorentz's material resonances model with the medium that metal structure depends on, thus design the antenna of multi-resonant frequency range.In the present embodiment, as shown in Fig. 2,3,4,9 and 10, antenna element 12 can be used for operating frequency is in 2.4GHz and 5.8GHz wireless communication apparatus.
In the present embodiment, about the processing and manufacturing of antenna element 12, as long as meet design principle of the present invention, various manufacture can be adopted.Prevailing method is the manufacture method using all kinds of printed circuit board (PCB) (PCB), and the PCB covering copper manufactures and all can meet processing request of the present invention.Also above-mentioned shaped metal structure 6, feeder line 4 and distributing point 5 all can be printed on FPC plate in addition.
Except above-mentioned processing mode, other manufacturing process can also be introduced according to the actual needs, as conductive silver paste ink processing mode, all kinds of can the processing mode that combines of the flexible PCB processing of deformable element, the processing mode of iron plate antenna and iron plate and PCB.Wherein, iron plate and PCB Combined machining mode refer to and utilize the accurate processing of PCB to complete the processing of chip microstructure portion, complete other slave part with iron plate.Owing to adopting the copper product of low cost to form described metal structure 6, therefore easily oxidized in exposure air and antenna element resonance frequency shift (FS) or performance are sharply declined, therefore antenna element 12 is provided with nonmetallic anti-oxidation film on the surface.Because main performance of the present invention all designs based in metal structure 6, therefore, the radiation frequency impact of lead-in wire on antenna element of feeder line 4 is relatively little.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (9)
1. an antenna element, is characterized in that, described antenna element comprises a medium substrate and is arranged at least two antenna elements on medium substrate; Described antenna element comprises a feed element, be arranged at the ground unit of feed element both sides, the feeder line that is connected with this feed element and a metal structure, and feeder line is connected with the mutual coupling electrical signals of metal structure; Described at least two antenna elements at least make the electromagnetic wave resonance of two different communication frequency bands;
Wherein, described at least two antenna element quantity are two, and be dislocation arrangement and be jointly arranged on the same surface of described medium substrate, and the length of the included separately feeder line of described at least two antenna elements is unequal, the width of the whole piece feeder line in each antenna element is unequal;
Wherein, the rest of described medium substrate is provided with perforation.
2. antenna element according to claim 1, is characterized in that, described at least two antenna elements are separate to be arranged on medium substrate.
3. antenna element according to claim 1, is characterized in that, described feed element, ground unit, feeder line and a metal structure all adopt copper product to make.
4. antenna element according to claim 1, is characterized in that, between described two antenna elements, Signal segregation degree is maximum is arranged on medium substrate.
5. antenna element according to claim 1, is characterized in that, the metal structure in described two antenna elements is identical.
6. antenna element according to claim 1, is characterized in that, the metal structure in described two antenna elements is a pair complementary metal structure.
7. antenna element according to claim 1, is characterized in that, described medium substrate adopts dielectric material to make.
8. antenna element according to claim 1, is characterized in that, described ground unit can be provided with metallized through hole.
9. one kind comprises the MIMO antenna device of the antenna element in claim 1 to 8 any one, it is characterized in that, MIMO antenna device comprises switch unit and MIMO modulation-demodulation circuit, and MIMO modulation-demodulation circuit receives the signal of telecommunication of described antenna element by switch unit and transmits the signal of telecommunication to described antenna element.
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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| CN102931474A CN102931474A (en) | 2013-02-13 |
| CN102931474B true CN102931474B (en) | 2016-02-10 |
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| CN201110228657.XA Active CN102931474B (en) | 2011-08-10 | 2011-08-10 | Antenna element and mimo antenna device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300211B (en) | 2013-07-17 | 2019-08-30 | 中兴通讯股份有限公司 | A kind of mimo antenna, terminal and its method for improving isolation |
| CN103441327B (en) * | 2013-08-28 | 2015-05-27 | 电子科技大学 | Multi-notch ultra wide band antenna |
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| CN101651256B (en) * | 2008-08-13 | 2013-08-07 | 深圳富泰宏精密工业有限公司 | Tri-band antenna |
| CN201392888Y (en) * | 2009-04-10 | 2010-01-27 | 北京华盛天基通信技术有限公司 | Intelligent dual-polarized antenna |
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| 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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