CN102931477A - Double-frequency antenna - Google Patents
Double-frequency antenna Download PDFInfo
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- CN102931477A CN102931477A CN201110228738XA CN201110228738A CN102931477A CN 102931477 A CN102931477 A CN 102931477A CN 201110228738X A CN201110228738X A CN 201110228738XA CN 201110228738 A CN201110228738 A CN 201110228738A CN 102931477 A CN102931477 A CN 102931477A
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 62
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- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
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- 229910052742 iron Inorganic materials 0.000 description 4
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- 229910052709 silver Inorganic materials 0.000 description 1
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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, 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.
In some more complicated electronic systems, antenna needs multimode operation, just need to design by the impedance matching network outside the feed antenna forehead.But the increase that impedance matching network is extra the feeder line design of electronic system, increased radio system area simultaneously matching network also introduced many energy losses, be difficult to satisfy the requirement of system design of low-power consumption.Therefore, miniaturization, multimodal antenna technology become a problem demanding prompt solution of contemporary electronics integrated system.
Summary of the invention
The technical problem to be solved in the present invention is, the traditional antenna technology is difficult to carry out under the size-constrained prerequisite of portable terminal, and the above-mentioned requirement of system design that is difficult to satisfy the Modern Communication System low-power consumption of prior art, the invention provides a kind of framework of breaking through the traditional antenna design, save the somewhat complex design of impedance matching network, guarantee its miniaturization, can be applied among the size-constrained portable terminal, and a kind of dual-band antenna that the aerial radiation area utilization is high, antijamming capability is strong.
A kind of dual-band antenna comprises a distributing point, the feeder line that is connected with this distributing point and a metal structure; Feeder line and metal structure intercouple; Described metal structure makes the electromagnetic wave resonance of two different-wavebands at least.
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, is provided with several metallized through holes on the described ground unit.
Further, the described ground unit described distributing point both sides that distribute symmetrically.
Further, described dual-band antenna also comprises a medium substrate, and described distributing point, ground unit, feeder line and a metal structure all are arranged on described medium substrate one surface.
Further, described medium substrate adopts the medium substrate of air, pottery or insulation function.
Further, described medium substrate is made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.
Further, described macromolecular material is FR-4 and F
4Among the B any one.
Further, be provided with nonmetallic anti-oxidation film on the described dual-band antenna surface.
Further, described metal structure is the plane tabular shape.
The metal structure of the electromagnetic wave resonance that adopts the artificial electromagnetic material Theoretical Design to send as an envoy to make at least two different-wavebands, and choose the metal structure of impedance matching according to the employing wireless electronic product; Because the physical size of these metal structure sizes is not limited by the physical length of half-wavelength; Described metal structure and feeder line carried out signal coupling and form dual-band antenna among the present invention.Described dual-band antenna can receive and send the electromagnetic wave that makes at least two different-wavebands simultaneously, therefore uses a dual-band antenna of the present invention can satisfy simultaneously the multi-mode working of multiband; Minimizing wireless telecommunications electronic equipment in the market needs the situation of many antennas at the multi-mode working of multiband.In addition, metal structure is to design not limited by the physical length of half-wavelength, and therefore the own size according to electronic equipment can design corresponding large miniature antenna, to satisfy the miniaturization demand of electronic equipment.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is the dual-band antenna plane structure chart of an embodiment of the present invention;
Fig. 2 is that dual-band antenna shown in Figure 1 depends on the structure chart on the medium substrate;
Fig. 3 is metal structure and the another kind of signal feed-in of the feeder line mode plane structure chart on the dual-band antenna of the present invention;
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 the 4th kind of feed-in mode plane structure chart of feeder line of dual-band antenna of the present invention;
Fig. 6 is the dual-band antenna plane structure chart of a complementary metal structure of dual-band antenna shown in Figure 1;
Fig. 7 is the part plane structure chart of the dual-band antenna of fifth embodiment of the invention.
Embodiment
The present invention will be further described below in conjunction with drawings and the specific embodiments:
As shown in Figure 1, be the Double-frequency antenna structure schematic diagram of an embodiment of the present invention.Dual-band antenna 10 among the present invention comprises a distributing point 5, the feeder line 4 that is connected with this distributing point 5 and the metal structure 6 of a plane tabular.Wherein feeder line 4 intercouples with metal structure 6; Described metal structure 6 is for adopting the artificial electromagnetic material theory to design, and namely super material technology is theoretical; Described artificial electromagnetic material refers to sheet metal fabrication design (such as modes such as employing etch processs) is become the metal structure of the electromagnetic definite shape of response, described artificial electromagnetic material also can transform electromagnetic wave with high frequency electrical signal, makes at least 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 violent variation can occur frequency.Thereby can design based on the fundamental characteristics of artificial electromagnetic material method for designing with metal structure, so that the medium substrate that metal structure depends on it has formed a highly dispersed extraordinary electromagnetic material equivalently, thereby realize the antenna that radiation characteristic is abundant.
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 also is copper and silver combination.
Dual-band antenna 10 also comprises ground unit 8, is provided with several metallized through holes 81 on the described ground unit 8.In the present embodiment, described ground unit 8 described distributing point 5 both sides that distribute symmetrically.
Present embodiment utilizes the characteristic of artificial electromagnetic material, the mode of metal structure 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 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, metal structure 6 makes 2.4GHz-2.49GHz and two frequency range electromagnetic waves of 4.9GHz-5.9GHz 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 planforms keep with present embodiment in consistent.
See also 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 all are arranged on described medium substrate 7 one surfaces; Described feeder line 4 adopts the described metal structure 6 of coupled modes feed-in.Described medium substrate 7 can adopt the medium substrate of air, pottery or insulation function.Among the present invention, medium substrate 7 is made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.Preferably, being made by macromolecular material, can be the macromolecular materials such as FR-4, F4B particularly.
Please in the lump with reference to figure 3, Fig. 4 and Fig. 5, signal feed-in mode can adopt various ways between described feeder line 4 and the metal structure 6.As shown in Figure 3, 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. 4,5, 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. 6, according to the 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 two frequency ranges of 5.8GHz.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 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), as the PCB that covers copper makes and all can satisfy processing request of the present invention.Except this 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 dual-band antenna 10 resonance frequency shifts or performance are sharply descended easily in the exposure air, so be provided with nonmetallic anti-oxidation film on the dual-band antenna surface.Because main performance of the present invention all concentrates on the design of metal structure 6 topological sum chips part, therefore, the lead-in wire of feeder line 4 affects less to the radiation frequency of dual-band antenna 10.Based on these characteristics, 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 be used the wireless communication apparatus that comprises 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.
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. a Double RF antenna is characterized in that, described Double RF antenna comprises a distributing point, the feeder line that is connected with this distributing point and a metal structure; Feeder line and metal structure intercouple; Described metal structure makes the electromagnetic wave resonance of two different-wavebands at least.
2. Double RF antenna according to claim 1 is characterized in that, the electromagnetic frequency band of described two kinds of different-wavebands is 2.4GHz-2.49GHz and 4.9GHz-5.9GHz.
3. Double RF antenna according to claim 1 is characterized in that, described Double RF antenna also comprises ground unit, is provided with several metallized through holes on the described ground unit.
4. Double RF antenna according to claim 3 is characterized in that, the described ground unit described distributing point both sides that distribute symmetrically.
5. Double RF antenna according to claim 3 is characterized in that, described Double RF antenna also comprises a medium substrate, and described distributing point, ground unit, feeder line and a metal structure all are arranged on described medium substrate one surface.
6. Double RF antenna according to claim 5 is characterized in that, described medium substrate adopts the medium substrate of air, pottery or insulation function.
7. Double RF antenna according to claim 5 is characterized in that, described medium substrate is made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.
8. Double RF antenna according to claim 7 is characterized in that, described macromolecular material be among FR-4 and the F4B any one.
9. Double RF antenna according to claim 1 is characterized in that, is provided with nonmetallic anti-oxidation film on the described Double RF antenna surface.
10. Double RF antenna according to claim 1 is characterized in that, described metal structure is the plane tabular shape.
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 true CN102931477A (en) | 2013-02-13 |
| CN102931477B 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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| CN102931477B (en) | 2015-02-04 |
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