CN103036021A - Wireless backhaul device - Google Patents
Wireless backhaul device Download PDFInfo
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- CN103036021A CN103036021A CN2011102996598A CN201110299659A CN103036021A CN 103036021 A CN103036021 A CN 103036021A CN 2011102996598 A CN2011102996598 A CN 2011102996598A CN 201110299659 A CN201110299659 A CN 201110299659A CN 103036021 A CN103036021 A CN 103036021A
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Abstract
The invention relates to a wireless backhaul device which comprises antennas. The antennas are metamaterial antennas which comprise a dielectric substrate, a feeding point which is arranged at one surface of the dielectric substrate, a feeder connected with the feeding point and a metal structure. The feeder and the metal structure are intercoupled and the metamaterial antennas are used for sending and receiving electromagnetic wave signals. The wireless backhaul device using built-in metamaterial antennas designs a metamaterial antenna which can resonate electromagnetic wave of one wave band, two wave bands or more different wave bands based on the metamaterial antenna technology, which decides the physical size of the metal structure size of the antenna size without being limited by the physical length of half-wavelength and designs corresponding antenna according to the size of the wireless backhaul device itself, thereby meeting wireless communication requirements of miniaturization, built-in antenna, remote and high gain. Moreover, the wireless backhaul device can transmit signals of high speed, ultra wide band and high-capacity through built-in metamaterial antenna.
Description
Technical field
The present invention relates to wireless backhaul equipment, especially relate to a kind of wireless backhaul equipment that is applied in the cordless communication network.
Background technology
In the cordless communication network, for example, WiMAX network (World interoperability Microwave Access, World Interoperability for Microwave Access, WiMax, described WiMAX network is a kind of wireless MAN based on the IEEE802.16 series standard) in, at the deployment initial stage, will be mainly for the very imperfect zone of developing country, urban periphal defence and network infrastructure.The number of users at initial stage is limited there, and the service application type is single, and is lower to the demand of network capacity.How to utilize this moment cheaply network coverage technology to make cordless communication network realize rapidly extensive the covering, can dominate the market fast be its key that lead to success.Wherein, the WiMAX technology has caused the concern of each side as " access of Hypomobility broadband IP " scheme.How to utilize relevant low-cost technologies to realize WiMAX in the large scale deployment at commercial initial stage, this becomes the key factor of the large-scale application of WiMAX technology.
A key issue that realizes above-mentioned cordless communication network large-scale application is exactly how to arrange net fast and reduce network construction cost.Because wireless backhaul has avoided wired cost of arranging net high, therefore the problems such as difficult wiring more and more are subject to the attention of operator.Utilize the Radio Resource in WiMAX base station own, the realization wireless backhaul links can be dealt with problems with more putting.Existing base station with wireless backhaul links is provided with the antenna for the transmitting-receiving radiofrequency signal usually, and described antenna gain is little, and transmission range is short, thereby can not satisfy the demand.
Summary of the invention
In order to solve the problem that exists in the existing wireless backhaul equipment, the invention provides a kind of wireless backhaul equipment of wireless video access, by using high performance super material built-in aerial technology, can satisfy wireless telecommunications system miniaturization, built-in antenna, reach the demand of high-gain at a distance, the present invention by the following technical solutions:
A kind of wireless backhaul equipment comprises antenna, and described antenna is super material antenna, and described super material antenna comprises a medium substrate and a distributing point that is arranged at described medium substrate one surface, the feeder line that is connected with described distributing point and a metal structure; Described feeder line and described metal structure intercouple, and described super material antenna is used for the transmitting-receiving electromagnetic wave signal.
Further, described metal structure is that sheet metal forms through engraving out the groove topological structure.
Further, described super material antenna also comprises ground unit, the described ground unit described distributing point both sides that distribute symmetrically; Be provided with several metallized through holes on the described ground unit.
Further, described super material antenna also comprises one with reference to ground, described with reference to ground comprise be positioned at described medium substrate relative two lip-deep first with reference to unit, ground and second with reference to the unit, ground, described first makes an end of described feeder line form microstrip line with reference to the unit, ground.
Further, described the first reference unit, ground and second is electrically connected mutually with reference to the unit, ground.
Further, described medium substrate is provided with some plated-through holes, and unit, described the first reference ground is realized being electrically connected by described plated-through hole with reference to the unit, ground with described second.
Further, unit, described the first reference ground is provided with the first metal covering unit and the second metal covering unit of mutual electrical connection, and described the first metal covering unit is relative with an end position of described feeder line, makes an end of described feeder line form described microstrip line; Unit, described the second reference ground is provided with the 3rd metal covering unit, and described the 3rd metal covering unit is relative with described the second metal covering cell position.
Further, described medium substrate is positioned at described the second metal covering unit and place, described the 3rd metal covering unit offers some plated-through holes, and described the second metal covering unit is electrically connected by described plated-through hole with described the 3rd metal covering unit.
Further, unit, described the second reference ground also comprises the 4th metal covering unit, described the 4th metal covering unit is positioned at a side of described feeder line one end, and be positioned on the bearing of trend of described feeder line, described the first metal covering unit is electrically connected by described plated-through hole with described the 4th metal covering unit.
Further, the resonance band of described super material antenna comprises 2.4GHz-2.49GHz and 5.72GHz-5.85GHz at least.
Relative prior art, wireless backhaul equipment of the present invention adopts built-in super material antenna, yet the design super material antenna of electromagnetic wave resonance of a wave band, two or more different-wavebands of sening as an envoy to based on super material antenna technology, the physical size that determines the metal structure size of this antenna volume is not limited by the physical length of half-wavelength, can go out corresponding antenna according to the size design of wireless backhaul equipment own, satisfy the demand of wireless telecommunications system miniaturization, built-in antenna and high-gain.In addition, by built-in super material antenna, can realize that high speed, ultra broadband, jumbo signal transmit with wireless mode.
Description of drawings
Fig. 1 is the theory diagram of wireless backhaul equipment of the present invention;
Fig. 2 is the front view of antenna the first execution mode in the wireless backhaul equipment of the present invention;
Fig. 3 is antenna rearview shown in Figure 2;
Fig. 4 is antenna the first execution mode S parameters simulation figure of the present invention;
Fig. 5 is the front view of antenna the second execution mode in the wireless backhaul equipment of the present invention;
Fig. 6 is the front view of antenna the 3rd execution mode in the wireless backhaul equipment of the present invention;
Fig. 7 is the metal structure enlarged drawing on second and third execution mode of antenna of the present invention;
Fig. 8 is antenna the 3rd execution mode S parameters simulation figure of the present invention;
Fig. 9 is that the embodiment of the invention 2 operates in 2.4,2.44, E direction far field simulation result figure during 2.48GHz;
Figure 10 is that the embodiment of the invention 2 operates in 2.4,2.44, H direction far field simulation result figure during 2.48GHz;
Figure 11 is that the embodiment of the invention 2 operates in 5.725,5.8, E direction far field simulation result figure during 5.85GHz;
Figure 12 is that the embodiment of the invention 2 operates in 5.725,5.8, H direction far field simulation result figure during 5.85GHz.
Embodiment
Below in conjunction with the drawings and specific embodiments wireless backhaul equipment of the present invention is done a step explanation.
See also Fig. 1, it is the theory diagram of the wireless backhaul equipment among the present invention.Described wireless backhaul equipment 100 comprises super material antenna 10 and wireless backhaul equipment body 11.Described super material antenna 10 is electrically connected with described wireless backhaul equipment body 11, and is used for the transmitting-receiving electromagnetic wave signal.In the present invention, described wireless backhaul equipment 100 includes but not limited to base station, switch etc.
Antenna is based on the artificial electromagnetic material Technology design and forms in the wireless backhaul equipment of the present invention, artificial electromagnetic material refers to sheet metal is engraved into the topological metal structure of given shape, and the topological metal structure of described given shape is arranged on certain dielectric constant and the magnetic permeability base material and the equivalent extraordinary electromagnetic material of processing and manufacturing, its performance parameter depends primarily on the topological metal structure of the given shape of its sub-wavelength.In resonance band, artificial electromagnetic material embodies the dispersion characteristics of height usually, in other words, the impedance of antenna, holds perception, equivalent dielectric constant and magnetic permeability along with violent variation can occur frequency.Thereby can adopt the artificial electromagnetic material technology that the fundamental characteristics of above-mentioned antenna is transformed, so that the medium substrate that metal structure depends on it has formed a highly dispersed extraordinary electromagnetic material equivalently, thereby realize the new antenna that radiation characteristic is abundant.Below introduce in detail several execution modes in the employing wireless upstream device:
The first execution mode
See also Fig. 2 and Fig. 3, described super material antenna 10 comprises medium substrate 1, metal structure 2, feeder line 3 and reference ground 41,42, described medium substrate 1 is rectangular tabular, and it can be made by materials such as high molecular polymer, pottery, ferroelectric material, ferrite material or ferromagnetic materials.In the present embodiment, the material of described medium substrate 1 adopts glass material (FR4) to make, thereby not only cost is low, and can guarantee to keep in different operating frequencies good antenna operating characteristic.
Described metal structure 2, feeder line 3 and reference ground 41,42 place respectively on the two relative surfaces of described medium substrate 1, described metal structure 2, feeder line 3 and reference ground 41,42 form super material antenna with described medium substrate 1, the performance of described super material antenna depends on described metal structure 2, in resonance band, super material embodies the dispersion characteristics of height usually, it is its impedance, hold perception, the dielectric constant of equivalence and magnetic permeability are along with violent variation can occur frequency, thereby by changing the fundamental characteristics of described metal structure 2 and medium substrate 1, just so that described metal structure 2 forms one according to the highly dispersed extraordinary electromagnetic material of Lorentz material resonances model equivalently with medium substrate 1.
See also Fig. 4, the working frequency range of the super material antenna in the present embodiment is 2.4GHZ～2.49GHZ and 5.72GHZ～5.85GHZ, and the gain of above-mentioned this two frequency range can reach 3.58dBi and 3.14dBi respectively.Be understandable that it is 2.4GHZ～2.49GHZ frequency range, i.e. single-band antenna that 10 response frequencies of super material antenna can be set.
Described feeder line 3 is arranged on a side of described metal structure 2, and extends along the length direction of described metal structure 2, and itself and described metal structure 2 intercouple, and wherein, the bending of an end of described feeder line 3 extends to described metal structure 2 ends one side.In addition, embed as required the capacitive electronic component in the space between described feeder line 3 and metal structure 2, regulate signal coupling between feeder line 3 and the metal structure 2 by embedding the capacitive electronic component, by formula:
, square being inversely proportional to of the size of capacitance and operating frequency as can be known, so when the operating frequency that needs during for low operating frequency, can be by suitable embedding capacitive electronic component realization.The capacitance scope of the capacitive electronic component that adds is usually between 0-2pF, but the capacitance that embeds along with the variation of operating frequency of antenna also may exceed the scope of 0-2pF.
Described reference ground is positioned at a side of described feeder line 3, makes an end of the described metal structure of being positioned at of described feeder line 32 ends form microstrip line 31.In the present embodiment, described with reference to ground comprise first with reference to unit 41, ground and second with reference to unit 42, ground, described first lays respectively at relative two surfaces of described medium substrate 1 with reference to unit 41, ground and second with reference to unit 42, ground.Unit 41, described the first reference ground is provided with the first metal covering unit 411 and the second metal covering unit 412 of mutual electrical connection.Unit 42, described the second reference ground is positioned at the same side of described medium substrate 1 with described feeder line 3, and is provided with the 3rd metal covering unit 421 and the 4th metal covering unit 422.
Described the first metal covering unit 411 is relative with described feeder line 3 positions, makes an end of the described metal structure of being positioned at of described feeder line 32 ends form described microstrip line 31, namely described with reference to ground for virtually.Described the second metal covering unit 412 is relative with 421 positions, described the 3rd metal covering unit.Described the 3rd metal covering unit 421 is positioned at an end of described metal structure 2, and described the 3rd metal covering unit 421 is rectangular panel shape, and identical with the bearing of trend of described feeder line 3.Described medium substrate 1 is positioned at described the second metal covering unit 412 and 421 places, described the 3rd metal covering unit offer some plated-through holes 5, and described the second metal covering unit 412 is electrically connected by described plated-through hole 5 with described the 3rd metal covering unit 421.
Described the 4th metal covering unit 422 is positioned at a side of described feeder line 3 one ends, and is positioned on the bearing of trend of described feeder line 3.Described medium substrate 1 is positioned at described the first metal covering unit 411 and 422 places, described the 4th metal covering unit offer some plated-through holes 5, and described the first metal covering unit 411 is electrically connected by described plated-through hole 5 with described the 4th metal covering unit 422.End by the first metal covering unit 411 and described feeder line 3 forms described microstrip line 31, thereby can reduce external signal the signal that transmits at described feeder line 3 is disturbed, and improves antenna gain, realizes preferably impedance matching, saves material, and cost is low.Pass through cleverly position setting between 411 to the 4th metal covering unit 422, described the first metal covering unit, thereby take less space with making described reference, just realize larger area.In addition, by described plated-through hole 5 is set, thereby can further improve described area with reference to ground.
In sum, topological form and the layout described microstrip line 31 of high gain metamaterial antenna of the present invention by critically controlling metal structure 2, the effective dielectric constant and the magnetic permeability that needing to obtain distribute, and make antenna can realize preferably impedance matching in working frequency range, finish expeditiously power conversion, and obtain desirable radiation pattern, it is little that it takies volume, low to environmental requirement, and gain is high, applied range, the built-in aerial of applicable wireless backhaul equipment.
The second execution mode
As shown in Figure 5, be the structural representation of the super material antenna 10 of the embodiment of the invention.Super material antenna 10 in the present embodiment comprises medium substrate 7 and is arranged on the distributing point 5 on the medium substrate 7, the feeder line 4 that is connected with this distributing point 5, the metal structure 6 of plane tabular.Wherein, feeder line 4 intercouples with metal structure 6; Metal structure 6 is that sheet metal forms through engraving out groove topological structure 61, remove the material of groove topological structure 61 correspondences when engraving, remaining sheet metal is metal structure 6, after engraving out groove topological structure 61, presents the metal routing 62 that is included in the metal structure 6 on the sheet metal; The spacing of adjacent slot is the width of metal routing 62 in the groove topological structure 61, and the groove width of groove topological structure 61 equates with the width of metal routing 62, and is 0.15mm; Medium substrate 7 can be made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material, preferably, made by macromolecular material, and can be the macromolecular materials such as FR-4, F4B particularly.
In the present embodiment, metal structure 6 is axisymmetric plane tabular.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 6 also can be copper and silver combination.
See also Fig. 6, be the third embodiment of the invention front view, the 3rd execution mode and the difference of the second execution mode are also to comprise ground unit 8, are provided with some metallized through holes 81 on the ground unit 8; Ground unit 8 described distributing point 5 both sides that distribute symmetrically, the selection of medium substrate 7 is identical with embodiment 1.Figure 7 shows that the enlarged drawing of the metal structure of the second execution mode and the 3rd execution mode.That signal feed-in mode can have multiple between feeder line 4 and the metal structure 6 with being appreciated that.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.The end that feeder line 4 adopts the encirclement mode to be arranged at described metal structure 6 peripheries and feeder line 4 is arranged at metal structure 6 peripheral optional positions.
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 substrate that depends on metal structure are common, thereby design the shake antenna of frequency range of multi resonant.In the present embodiment, antenna shown in the second execution mode and the 3rd execution mode makes 2.4GHz-2.49GHz and two frequency range electromagnetic waves of 5.72GHz-5.85GHz resonance, the length of metal structure 6 and widely can do any adjustment according to the communication apparatus organization distribution, but metal structure 6 planforms keep with present embodiment in consistent getting final product, this unipole antenna can be used for the communication apparatus of single-frequency 2.4GHz-2.49GHz or 5.72GHz-5.85GHz frequency range, also can be used for the communication apparatus of double frequency 2.4GHz-2.49GHz and 5.72GHz-5.85GHz frequency range.
Be illustrated in figure 8 as the S parameters simulation figure of second embodiment of the invention and the 3rd execution mode, the antenna that the figure shows the second execution mode and the 3rd execution mode has respectively at 2.4GHz and 5.8018GHz-15.426dB and-loss of 19.184dB, in 2.4GHz-2.49GHz of the presently claimed invention and 5.72GHz-5.85GHz frequency band, all have-loss below the 10dB, show that antenna of the present invention can work separately in 2.4GHz-2.49GHz or 5.72GHz-5.85GHz frequency band, also can in 2.4GHz-2.49GHz and 5.72GHz-5.85GHz frequency band, work simultaneously, and satisfy in the wireless backhaul equipment requirement to super material antenna 10.
Fig. 9, Figure 10, Figure 11 and Figure 12 show respectively that second embodiment of the invention and the super material antenna 10 of the 3rd execution mode operate in 2.4,2.44, when 2.48GHz and 5.725,5.8,5.85GHz respectively at vertical plane (E-Plane) and horizontal plane (H-Plane) direction far field simulation result figure, the polarization effect that can observe super material antenna of the present invention in this result is not second to existing antenna and meet application standard.
Among the present invention, about the processing and manufacturing of super material 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 refers to utilize the accurate processing of PCB to finish the processing of groove topological structure, finishes other slave part with iron plate.Owing to adopt cheaply that copper product forms described metal structure 6, thus oxidized and super material 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 unipole antenna surface.Because main performance of the present invention all concentrates on the design of metal structure 6 groove topological structures 61, therefore, the lead-in wire of feeder line 4 affects less to the radiation frequency of super material antenna 10.Based on these characteristics, unipole antenna can be placed in any position of system, the complexity of the installation testing of simplification flexibly.
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. wireless backhaul equipment, comprise antenna, it is characterized in that described antenna is super material antenna, described super material antenna comprises a medium substrate and a distributing point that is arranged at described medium substrate one surface, the feeder line that is connected with described distributing point and a metal structure; Described feeder line and described metal structure intercouple, and described super material antenna is used for the transmitting-receiving electromagnetic wave signal.
2. wireless backhaul equipment according to claim 1 is characterized in that, described metal structure is that sheet metal forms through engraving out the groove topological structure.
3. wireless backhaul equipment according to claim 1 is characterized in that, described super material antenna also comprises ground unit, the described ground unit described distributing point both sides that distribute symmetrically; Be provided with several metallized through holes on the described ground unit.
4. wireless backhaul equipment according to claim 1, it is characterized in that, described super material antenna also comprises one with reference to ground, described with reference to ground comprise be positioned at described medium substrate relative two lip-deep first with reference to unit, ground and second with reference to the unit, ground, described first makes an end of described feeder line form microstrip line with reference to the unit, ground.
5. high gain metamaterial antenna according to claim 4 is characterized in that: described first is electrically connected with reference to the unit, ground mutually with reference to unit, ground and second.
6. wireless backhaul equipment according to claim 5, it is characterized in that: described medium substrate is provided with some plated-through holes, and described first is electrically connected by described plated-through hole realization with reference to the unit, ground with described second with reference to the unit, ground.
7. according to claim 4 or 5 or 6 described wireless backhaul equipment, it is characterized in that: unit, described the first reference ground is provided with the first metal covering unit and the second metal covering unit of mutual electrical connection, described the first metal covering unit is relative with an end position of described feeder line, makes an end of described feeder line form described microstrip line; Unit, described the second reference ground is provided with the 3rd metal covering unit, and described the 3rd metal covering unit is relative with described the second metal covering cell position.
8. wireless backhaul equipment according to claim 7, it is characterized in that: described medium substrate is positioned at described the second metal covering unit and place, described the 3rd metal covering unit offers some plated-through holes, and described the second metal covering unit is electrically connected by described plated-through hole with described the 3rd metal covering unit.
9. wireless backhaul equipment according to claim 7, it is characterized in that: unit, described the second reference ground also comprises the 4th metal covering unit, described the 4th metal covering unit is positioned at a side of described feeder line one end, and be positioned on the bearing of trend of described feeder line, described the first metal covering unit is electrically connected by described plated-through hole with described the 4th metal covering unit.
10. each described wireless backhaul equipment is characterized in that the resonance band of described super material antenna comprises 2.4GHz-2.49GHz and 5.72GHz-5.85GHz at least according to claim 1-6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110299659.8A CN103036021B (en) | 2011-09-30 | 2011-09-30 | Wireless backhaul device |
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| CN201110299659.8A CN103036021B (en) | 2011-09-30 | 2011-09-30 | Wireless backhaul device |
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| CN103036021A true CN103036021A (en) | 2013-04-10 |
| CN103036021B CN103036021B (en) | 2017-02-08 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101667680A (en) * | 2009-08-31 | 2010-03-10 | 深圳市启汉科技有限公司 | Monopole radio frequency antenna |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101667680A (en) * | 2009-08-31 | 2010-03-10 | 深圳市启汉科技有限公司 | Monopole radio frequency antenna |
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