CN102931477B - Double-frequency antenna - Google Patents
Double-frequency antenna Download PDFInfo
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- CN102931477B CN102931477B CN201110228738.XA CN201110228738A CN102931477B CN 102931477 B CN102931477 B CN 102931477B CN 201110228738 A CN201110228738 A CN 201110228738A CN 102931477 B CN102931477 B CN 102931477B
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Abstract
The invention relates to a double-frequency antenna. The antenna comprises a feed point, a feed line connected with the feed point, and a metal structure, wherein the feed line is coupled with the metal structure; and the metal structure has at least two electromagnetic wave resonant wavelength ranges. A related electromagnetic wave resonant response metal structure library is made of a manual electromagnetic material, and the structure is small compared with the traditional antenna structure, so that the physical size of the antenna is not limited by the physical length of half-wavelength; according to an application product, the impedance matching metal structure is selected, continuously screened, tested and adjusted and optimized to form the metal structure suitable for the double-frequency antenna, so that the selected metal structure has at least two electromagnetic wave resonant wavelength ranges; and based on the two aspects, one antenna can meet requirements on miniaturization and multi-mode working of wireless electronic equipment.
Description
Technical field
The present invention relates to communication antenna, more particularly, relate to a kind of dual-band antenna.
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.
In the electronic system that some are more complicated, antenna needs multimode operation, just needs the impedance matching network design outside feed antenna forehead.But the feeder line design of electronic system that what impedance matching network was extra add, increase radio system area simultaneously matching network also introduce many energy losses, be difficult to the requirement of system design meeting low-power consumption.Therefore, miniaturized, multimodal antenna technology becomes a problem demanding prompt solution of contemporary electronic integrated system.
Summary of the invention
The technical problem to be solved in the present invention is, traditional antenna technology is difficult to carry out under the prerequisite that mobile terminal is size-constrained, and the above-mentioned of prior art is difficult to the requirement of system design meeting Modern Communication System low-power consumption, the invention provides a kind of framework breaking through traditional antenna design, save the somewhat complex design of impedance matching network, ensure that it is miniaturized, can be applied among size-constrained mobile terminal, and a kind of dual-band antenna that aerial radiation area utilization is high, antijamming capability is strong.
A kind of dual-band antenna comprises a distributing point, the feeder line be connected with this distributing point and a metal structure; Feeder line and metal structure intercouple; Described metal structure at least makes the electromagnetic wave resonance of two different-wavebands.
Further, the electromagnetic frequency band of described two kinds of different-wavebands is 2.4GHz-2.49GHz and 4.9GHz-5.9GHz.
Further, described dual-band antenna also comprises ground unit, described ground unit is provided with several metallized through holes.
Further, described ground unit distributes described distributing point both sides symmetrically.
Further, described dual-band antenna also comprises a medium substrate, and described distributing point, ground unit, feeder line and a metal structure are all arranged at described medium substrate one on the surface.
Further, described medium substrate adopts the medium substrate of air, pottery or insulation function.
Further, described medium substrate is made up of ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.
Further, described macromolecular material is FR-4 and F
4in B any one.
Further, described dual-band antenna is provided with nonmetallic anti-oxidation film on the surface.
Further, described metal structure is plane tabular shape.
Adopt artificial electromagnetic material Theoretical Design to send as an envoy to the metal structure of the electromagnetic wave resonance at least making two different-wavebands, and choose the metal structure of impedance matching according to employing wireless electronic product; Because the physical size of these metal structure sizes does not limit by the physical length of half-wavelength; By the dual-band antenna that described metal structure and feeder line are carried out signal coupling and formed in the present invention.Described dual-band antenna can receive simultaneously and send the electromagnetic wave at least making two different-wavebands, therefore uses a dual-band antenna of the present invention can meet the multi-mode working of multiband simultaneously; The wireless telecommunications electronic equipment reduced in the market needs the situation of many antennas at the multi-mode working of multiband.In addition, metal structure designs not limit by the physical length of half-wavelength, therefore can design corresponding large miniature antenna according to the size of electronic equipment own, to meet the miniature requirement of electronic equipment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the dual-band antenna plane structure chart of an embodiment of the present invention;
Fig. 2 depends on the structure chart on a medium substrate for dual-band antenna shown in Fig. 1;
Fig. 3 is metal structure on dual-band antenna of the present invention and feeder line another kind of signal feed-in mode plane structure chart;
Fig. 4 is metal structure and the third feed-in mode plane structure chart of feeder line of dual-band antenna of the present invention;
Fig. 5 is metal structure and feeder line the 4th kind of feed-in mode plane structure chart of dual-band antenna of the present invention;
The dual-band antenna plane structure chart of the complementary metal structure that Fig. 6 is dual-band antenna shown in Fig. 1;
Fig. 7 is the part planar structure chart of the dual-band antenna of fifth embodiment of the invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be further described:
As shown in Figure 1, be the Double-frequency antenna structure schematic diagram of an embodiment of the present invention.Dual-band antenna 10 in the present invention comprises the metal structure 6 of a distributing point 5, the feeder line 4 be connected with this distributing point 5 and a plane tabular.Wherein feeder line 4 and metal structure 6 intercouple; Described metal structure 6 designs for adopting artificial electromagnetic material theory, i.e. Meta Materials technical know-how; Described artificial electromagnetic material refers to metal structure sheet metal fabrication design (as adopted the modes such as etch process) being become the electromagnetic definite shape of response, high frequency electrical signal also can be transformed electromagnetic wave by described artificial electromagnetic material, at least makes the electromagnetic wave resonance of two kinds of different wave lengths according to the metal structure of artificial electromagnetic material design; Its performance directly depends on the metal structure of electromagnetic wave sub-wavelength.Especially in the resonance band of metal structure, artificial electromagnetic material embodies the dispersion characteristics of height usually, in other words, the impedance of metal structure, holds perception, equivalent dielectric constant and magnetic permeability along with frequency violent change can occur.Thus can design based on the fundamental characteristics of artificial electromagnetic material design method by metal structure, the medium substrate that metal structure is depended on it constitutes a highly dispersed extraordinary electromagnetic material equivalently, thus realizes the abundant antenna of radiation characteristic.
In the present embodiment, described metal structure 6 is axisymmetric plane tabular metal structure.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.
Dual-band antenna 10 also comprises ground unit 8, described ground unit 8 is provided with several metallized through holes 81.In the present embodiment, described ground unit 8 distributes described distributing point 5 both sides symmetrically.
The present embodiment utilizes the characteristic of artificial electromagnetic material, adopt the mode of engraving into metal structure on sheet metal, make metal structure 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, metal structure 6 makes 2.4GHz-2.49GHz and 4.9GHz-5.9GHz two frequency range electromagnetic wave resonance as shown in Figure 1, the length of described metal structure 6 and widely can do any adjustment (as shown in Figure 7) according to electronic equipment mechanism layout, but metal structure 6 planform keeps consistent with the present embodiment.
Refer to Fig. 2, described dual-band antenna 10 also comprises a medium substrate 7, and described distributing point 5, ground unit 8, feeder line 4 and a metal structure 6 are all arranged at described medium substrate 7 one on the surface; Described feeder line 4 adopts metal structure 6 described in coupled modes feed-in.Described medium substrate 7 can adopt the medium substrate of air, pottery or insulation function.In the present invention, medium substrate 7 is made up of ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.Preferably, being made up of macromolecular material, can be the macromolecular materials such as FR-4, F4B particularly.
Please also refer to Fig. 3, Fig. 4 and Fig. 5, between described feeder line 4 and metal structure 6, signal feed-in mode can adopt various ways.As shown in Figure 3, 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 Figure 4,5, 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.
Refer to Fig. 6, according to artificial electromagnetic material design theory, a metal structure 6 ' complementary with the metal structure 6 of above-mentioned dual-band antenna 10, the resonance band of described metal structure 6 ' comprises 2.4GHz and 5.8GHz two frequency ranges.Therefore based on this, metal structure 6 ' can be contained in resonance band and comprise in the dual-band antenna of 2.4GHz and 5.8GHz.
In the present embodiment, about the processing and manufacturing of dual-band antenna 10, 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 as covered copper manufactures and all can meet processing request of the present invention.Except this 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 dual-band antenna 10 resonance frequency shift or performance are sharply declined, therefore dual-band antenna is provided with nonmetallic anti-oxidation film on the surface.Because main performance of the present invention all concentrates on the design of metal structure 6 topological sum chip part, therefore, the radiation frequency impact of lead-in wire on dual-band antenna 10 of feeder line 4 is relatively little.Based on this feature, dual-band antenna can be placed in any position of system, the complexity of the installation testing of simplification flexibly.
Above-mentioned dual-band antenna 10 directly can apply the wireless communication apparatus comprising 2.4GHz and 5.8GHz, described dual-band antenna 10 can directly be arranged on the pcb board of wireless communication apparatus, also can adopt interface that dual-band antenna 10 is connected with the pcb board of wireless communication apparatus by an interface.
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 (7)
1. a dual-band antenna, is characterized in that, described dual-band antenna comprises a distributing point, the feeder line be connected with this distributing point and a metal structure; Feeder line and metal structure intercouple; Described metal structure at least makes the electromagnetic wave resonance of two different-wavebands; The electromagnetic frequency band of described two kinds of different-wavebands is 2.4GHz-2.49GHz and 4.9GHz-5.9GHz; Described dual-band antenna also comprises a medium substrate, and described distributing point, ground unit, feeder line and a metal structure are all arranged at described medium substrate one on the surface; Described metal structure is axisymmetric plane tabular metal structure.
2. dual-band antenna according to claim 1, is characterized in that, described dual-band antenna also comprises ground unit, described ground unit is provided with several metallized through holes.
3. dual-band antenna according to claim 2, is characterized in that, described ground unit distributes described distributing point both sides symmetrically.
4. dual-band antenna according to claim 2, is characterized in that, described medium substrate adopts the medium substrate of air, pottery or insulation function.
5. dual-band antenna according to claim 2, is characterized in that, described medium substrate is made up of ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.
6. dual-band antenna according to claim 5, is characterized in that, described macromolecular material is FR-4 and F
4in B any one.
7. dual-band antenna according to claim 1, is characterized in that, described dual-band antenna is provided with nonmetallic anti-oxidation film on the surface.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110228738.XA CN102931477B (en) | 2011-08-10 | 2011-08-10 | Double-frequency antenna |
| 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 |
|---|---|---|---|
| CN201110228738.XA CN102931477B (en) | 2011-08-10 | 2011-08-10 | Double-frequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102931477A CN102931477A (en) | 2013-02-13 |
| CN102931477B true CN102931477B (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110228738.XA Active CN102931477B (en) | 2011-08-10 | 2011-08-10 | Double-frequency antenna |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162800A (en) * | 2006-10-10 | 2008-04-16 | 西北工业大学 | Mobile phone antenna medium substrates with anti-symmetric structure left hand material |
| CN101800357A (en) * | 2009-02-09 | 2010-08-11 | 智易科技股份有限公司 | Double-frequency printed unipole antenna |
| WO2010101379A2 (en) * | 2009-03-02 | 2010-09-10 | 주식회사 이엠따블유 | Multiband and broadband antenna using metamaterials, and communication apparatus comprising same |
-
2011
- 2011-08-10 CN CN201110228738.XA patent/CN102931477B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162800A (en) * | 2006-10-10 | 2008-04-16 | 西北工业大学 | Mobile phone antenna medium substrates with anti-symmetric structure left hand material |
| CN101800357A (en) * | 2009-02-09 | 2010-08-11 | 智易科技股份有限公司 | Double-frequency printed unipole antenna |
| WO2010101379A2 (en) * | 2009-03-02 | 2010-09-10 | 주식회사 이엠따블유 | Multiband and broadband antenna using metamaterials, and communication apparatus comprising same |
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| CN102931477A (en) | 2013-02-13 |
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