CN103296470B - The substrate of Super-material antenna, Super-material antenna and the manufacture method of Super-material antenna - Google Patents
The substrate of Super-material antenna, Super-material antenna and the manufacture method of Super-material antenna Download PDFInfo
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- CN103296470B CN103296470B CN201210183153.5A CN201210183153A CN103296470B CN 103296470 B CN103296470 B CN 103296470B CN 201210183153 A CN201210183153 A CN 201210183153A CN 103296470 B CN103296470 B CN 103296470B
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Abstract
The invention discloses a kind of Super-material antenna, the substrate of Super-material antenna and the manufacture method of Super-material antenna.Wherein, described method comprises: high molecular polymer is carried out foaming and form expanded material; Described expanded material is processed into the substrate of Super-material antenna; Cover one deck copper film on the surface of described substrate, and described copper film is etched into man-made microstructure by etching method, the arrangement in described man-made microstructure cycle on the substrate, and then obtains Super-material antenna.The substrate weight formed due to foaming is comparatively light, therefore, it is possible to reduce the weight of Super-material antenna, and the transport of more convenient antenna, installation and use.
Description
Technical field
The present invention relates to Meta Materials field, particularly relate to a kind of Super-material antenna, the substrate of Super-material antenna and the manufacture method of Super-material antenna.
Background technology
Meta Materials refers to some artificial composite structures with the extraordinary physical property not available for natural material or composite material.By the orderly design of the structure on the key physical yardstick of material, the restriction of some performance natural law can be broken through, thus obtain the meta-materials function exceeding the intrinsic common character of nature.
The Meta Materials developed at present comprises " left-handed materials ", photonic crystal, " super magnetic material ".Wherein, " left-handed materials " refers to that the composite construction of the metal wire that periodic arranges and open loop resonator (SRR, Split Ring Resonators) realizes dielectric constant and magnetic permeability is negative two negative material simultaneously.And by making metal wire and open loop resonator composite construction can realize the two negative material of two dimension on a printed circuit.
The realization of metamaterial structure is main or complete to make metal wire on a printed circuit, has unique magnetic characteristic.These characteristics make antenna achieve miniaturization and performance improvement, can realize Efficient Operation in limited space.
In prior art, Super-material antenna mainly adopts the circuit board plate materials such as F4B, FR4 or PS as the substrate of antenna, and these sheet materials are heavier.And the weight of substrate account for the overwhelming majority of Super-material antenna weight, therefore use conventional panels as the substrate of Super-material antenna, the heavier-weight of Super-material antenna can be made, be unfavorable for the transport of antenna, installation and use.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of Super-material antenna, the substrate of Super-material antenna and the manufacture method of Super-material antenna, can reduce the weight of Super-material antenna, the transport of more convenient Super-material antenna, installation and use.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the substrate providing a kind of Super-material antenna, the material of substrate is the expanded material being foamed by high molecular polymer and formed.
Wherein, high molecular polymer comprises polyethylene, polyvinyl chloride, polystyrene, polyformaldehyde, polyvinyl formal, polyvinyl acetate, polyvinyl chloride colloidal sol or polyurethane.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of Super-material antenna, and comprise substrate and be attached to the man-made microstructure on substrate, the material of described substrate is the expanded material being foamed by high molecular polymer and formed.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the manufacture method providing a kind of Super-material antenna, comprising: high molecular polymer is carried out foaming and form expanded material; Expanded material is processed into the substrate of Super-material antenna; Cover one deck copper film on the surface of substrate, and described copper film is etched into man-made microstructure by etching method, the arrangement in described man-made microstructure cycle on the substrate, and then obtains Super-material antenna.
Wherein, high molecular polymer comprises polyethylene, polyvinyl chloride, polystyrene, polyformaldehyde, polyvinyl formal, polyvinyl acetate, polyvinyl chloride colloidal sol or polyurethane.
Wherein, the step of high molecular polymer being carried out foaming formation expanded material comprises: polyethylene or polyvinyl chloride are formed molten polymer; Inert gas is pressed into molten polymer; Reduce pressure raised temperature inert gas to be discharged expand and molten polymer foamed form expanded material, and utilizing the method for extrusion molding or injection mo(u)lding to obtain film as Super-material antenna substrate or thin plate.
Wherein, the step of high molecular polymer being carried out foaming formation expanded material comprises: will than in polystyrene low-boiling liquid press-in polystyrene, then heating makes liquid evaporate gasification, and then foaming forms expanded material, and the method for extrusion molding or injection mo(u)lding is utilized to obtain film as Super-material antenna substrate or thin plate.
Wherein, comprise than the low-boiling liquid of polystyrene: the liquid of aliphatic hydrocarbon, chloride aliphatic hydrocarbon or fluorine-containing aliphatic hydrocarbon.
Wherein, the step of high molecular polymer being carried out foaming formation expanded material comprises: polyformaldehyde, polyvinyl formal, polyvinyl acetate or polyvinyl chloride colloidal sol are stirred, be made into gel after forming uniform foams and solidify to form expanded material further, using the obtained film as Super-material antenna substrate or thin plate.
Wherein, the step of high molecular polymer being carried out foaming formation expanded material comprises: polyethers, vulcabond, kicker, blowing agent and foaming stabiliser are joined in polyurethane and mix, and stir, foam formation expanded material, using the obtained film as Super-material antenna substrate or thin plate.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention is by forming expanded material by high molecular polymer foaming, expanded material is processed into the substrate of Super-material antenna, processing process is carried out to form Super-material antenna to substrate, the substrate weight formed due to foaming is comparatively light, can reduce the weight of Super-material antenna; And the substrate that foaming is formed is comparatively soft, can carry out curling, thus the transport of convenient antenna, installation and use.
Accompanying drawing explanation
Fig. 1 is the perspective view of the elementary cell of Super-material antenna of the present invention;
Fig. 2 is the flow chart of manufacture method first embodiment of Super-material antenna of the present invention;
Fig. 3 is the flow chart of manufacture method second embodiment of Super-material antenna of the present invention;
Fig. 4 is the flow chart of manufacture method the 3rd embodiment of Super-material antenna of the present invention;
Fig. 5 is the flow chart of manufacture method the 4th embodiment of Super-material antenna of the present invention;
Fig. 6 is the flow chart of manufacture method the 5th embodiment of Super-material antenna of the present invention.
Embodiment
Light, as electromagnetic one, it is when passing glass, because the wavelength of light is much larger than the size of atom, therefore can use the univers parameter of glass, such as refractive index, instead of the response of glass to light is described the details parameter of the atom of composition glass.Accordingly, when research material is to other electromagnetic responses, in material, any yardstick also can with the univers parameter of material to electromagnetic response much smaller than the structure of electromagnetic wavelength, and such as DIELECTRIC CONSTANT ε and magnetic permeability μ describe.The structure often put by designing material is made the dielectric constant of material each point and magnetic permeability all identical or different thus makes the dielectric constant of material monolithic and magnetic permeability be certain rule arrangement, magnetic permeability and the dielectric constant of rule arrangement can make material have response macroscopically to electromagnetic wave, such as, converge electromagnetic wave, divergent electromagnetic ripple, electromagnetic wave absorption etc.The material of such magnetic permeability and dielectric constant with rule arrangement is referred to as Meta Materials.
As shown in Figure 1, Fig. 1 is the perspective view of the elementary cell of Super-material antenna of the present invention.The elementary cell of Super-material antenna comprises the substrate 1 of man-made microstructure 2 and this man-made microstructure 2 attachment.In the present invention, man-made microstructure 2 is artificial metal micro structure, artificial metal's micro-structural has and can produce the plane of response or three-dimensional topological structure to incident electromagnetic wave electric field and/or magnetic field, changes the response of elementary cell to incident electromagnetic wave that the pattern of the artificial metal's micro-structural in the elementary cell of each Super-material antenna and/or size can change each Super-material antenna.Substrate 1 is foamed by high molecular polymer and is formed, and wherein, high molecular polymer is polyethylene, polyvinyl chloride, polystyrene, polyformaldehyde, polyvinyl formal, polyvinyl acetate, polyvinyl chloride colloidal sol or polyurethane etc.
In one embodiment of the invention, man-made microstructure 2 is also coated with cover layer 3, cover layer 3, man-made microstructure 2 and substrate 1 form the elementary cell of Super-material antenna of the present invention.The elementary cell of multiple Super-material antenna arranges according to certain rules and Super-material antenna can be made to have the response of macroscopic view to electromagnetic wave.The elementary cell of macroscopical electromagnetic response therefore each Super-material antenna need be had need to form continuous response to the response of incident electromagnetic wave to incident electromagnetic wave because Super-material antenna is overall, this requires that the size of the elementary cell of each Super-material antenna is less than 1/5th of incident electromagnetic wave wavelength, is preferably 1/10th of incident electromagnetic wave wavelength.During this section describes, artificial is divided into multiple Super-material antenna elementary cell by Super-material antenna entirety, but should know that this kind of division methods is only for convenience of description, should not regard Super-material antenna as spliced by multiple Super-material antenna elementary cell or assemble, in practical application, Super-material antenna is arranged on substrate 1 in artificial metal's micro-structural cycle and can forms, and technique is simple and with low cost.Artificial metal's micro-structural in the elementary cell of each Super-material antenna of cycle arrangement can produce continuous print electromagnetic response to incident electromagnetic wave.
The production of Super-material antenna is positioned at the upstream of industrial chain, is the lifeblood of whole industrial chain, is described in detail below in conjunction with the manufacture method of drawings and Examples to Super-material antenna of the present invention.
Consult Fig. 2, Fig. 2 is the flow chart of manufacture method first embodiment of Super-material antenna of the present invention.In the present embodiment, the manufacture method of Super-material antenna comprises the steps:
Step S201, carries out foaming and forms expanded material by high molecular polymer.
Particularly, first high molecular polymer can be carried out foaming and form expanded material, then utilize extrusion molding, injection mo(u)lding or other method to obtain film as Super-material antenna substrate or thin plate.Wherein, high molecular polymer comprises polyethylene, polyvinyl chloride, polystyrene, polyformaldehyde, polyvinyl formal, polyvinyl acetate, polyvinyl chloride colloidal sol or polyurethane etc.For different high molecular polymers, its concrete manufacture method is different, and concrete manufacture method refers to hereafter.
Step S202, is processed into the substrate of Super-material antenna by expanded material.
Step S203, covers one deck copper film on the surface of substrate, and copper film is etched into man-made microstructure by etching method, and the arrangement in described man-made microstructure cycle on the substrate, and then obtains Super-material antenna.
After being made as Super-material antenna substrate, by covering one deck copper film on the surface of substrate and being processed to form man-made microstructure to obtain Super-material antenna.Particularly, can by covering the materials such as copper, silver or aluminium on the surface of described film or thin plate to form copper film, silverskin or aluminium film etc., then by methods such as etching, plating or ion quarters, this tunic is carved into man-made microstructure, and the described man-made microstructure cycle is arranged on film or thin plate, and then obtained Super-material antenna.Certainly, also can by other modes at materials such as the electroplating surface of film or thin plate or heavy copper, silver or aluminium to form copper film, silverskin or aluminium film etc.
In the present embodiment, because foaming forms the lighter in weight of substrate, the weight of Super-material antenna can be reduced; And the substrate that foaming is formed is comparatively soft, can realize curling function, thus the transport of convenient antenna, installation and use.
That carries out Super-material antenna below using polyethylene and polyvinyl chloride as high molecular polymer is made as example, sets forth manufacture method second embodiment of Super-material antenna of the present invention.
Consult Fig. 3, Fig. 3 is the flow chart of manufacture method second embodiment of Super-material antenna of the present invention.In the present embodiment, the manufacture method of Super-material antenna comprises the steps:
Step S301, forms molten polymer by polyethylene or polyvinyl chloride.
Join in melting furnace by polyethylene or polyvinyl chloride, the temperature controlling melting furnace heats, until solid-state polyethylene or polyvinyl chloride are melt into liquid molten polymer.In order to beautify Super-material antenna, can also adulterate look mother in this step, to adjust shades of colour.
Step S302, is pressed into molten polymer by inert gas.
In the melting furnace filling molten polymer, increase furnace pressure, inert gas is pressed in molten polymer as much as possible.Wherein, inert gas comprises: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) or radon (Rn) etc.
Step S303, reduces pressure raised temperature and inert gas is discharged expand and molten polymer is foamed, and utilizes the method for extrusion molding or injection mo(u)lding to obtain film as Super-material antenna substrate or thin plate.
When reduce pressure and raised temperature, inert gas discharges from molten polymer, makes molten polymer expand and foam, and obtains the blank of film as Super-material antenna substrate or thin plate by extrusion molding, injection mo(u)lding or other method.Extrusion molding herein, injection molding forming method are only and illustrate, other can also be had to make the method for the blank of film or thin plate.Cool when the blank of film or thin plate is placed and after solidifying, namely becomes film or thin plate.Control film or gauge of sheet, be located between 0.001 to 4 millimeter, such as: film or gauge of sheet are 0.001 millimeter, 2 millimeters or 4 millimeters.Wherein, film or thin plate directly can be used as substrate, also can be used as substrate after cutting processing.
Step S304, covers one deck copper film on the surface of film or thin plate, and copper film is etched into man-made microstructure by etching method, and the arrangement in described man-made microstructure cycle on the substrate, and then obtains Super-material antenna.
After the film being made as Super-material antenna substrate or thin plate, by covering one deck copper film on the surface of film or thin plate and being processed to form man-made microstructure to obtain Super-material antenna.Particularly, can by covering the materials such as copper, silver or aluminium on the surface of described film or thin plate to form copper film, silverskin or aluminium film etc., then by methods such as etching, plating or ion quarters, this tunic is carved into man-made microstructure, and the described man-made microstructure cycle is arranged on film or thin plate, and then obtained Super-material antenna.Certainly, also can by other modes at materials such as the electroplating surface of film or thin plate or heavy copper, silver or aluminium to form copper film, silverskin or aluminium film etc.
In addition, polyethylene and polyvinyl chloride can also be mixed to form pasty state compound and carry out foaming formation expanded material by the present embodiment, do not repeat them here.
That carries out Super-material antenna below using polystyrene as high molecular polymer is made as example, sets forth manufacture method the 3rd embodiment of Super-material antenna of the present invention.
Consult Fig. 4, Fig. 4 is the flow chart of manufacture method the 3rd embodiment of Super-material antenna of the present invention.In the present embodiment, the manufacture method of Super-material antenna comprises the steps:
Step S401, will than in polystyrene low-boiling liquid press-in polystyrene.
First polystyrene is added in heating furnace, then will than polystyrene low-boiling liquid press-in heating furnace by force (forcing) pump.Wherein, than the low-boiling liquid of polystyrene can be the liquid etc. of aliphatic hydrocarbon, chloride aliphatic hydrocarbon or fluorine-containing aliphatic hydrocarbon.In order to beautify Super-material antenna, can also adulterate look mother in this step, to adjust shades of colour.
Step S402, heating makes liquid evaporate gasification, and then foaming forms expanded material, and utilizes the method for extrusion molding or injection mo(u)lding to obtain film as Super-material antenna substrate or thin plate.
The polystyrene of temperature to press-in liquid controlling heating furnace heats.When high-temperature heating, be evaporated than the low-boiling liquid of polystyrene, remaining polystyrene is the formation expanded material that foams because of poly-expansion, and is obtained the blank of film or thin plate by extrusion molding, injection mo(u)lding or other method.Extrusion molding herein, injection molding forming method are only and illustrate, other can also be had to make the method for the blank of film or thin plate.Cool when the blank of film or thin plate is placed and after solidifying, namely becomes film or thin plate.Control film or gauge of sheet, be located between 0.001 to 4 millimeter, such as: film or gauge of sheet are 0.001 millimeter, 2 millimeters or 4 millimeters.Wherein, film or thin plate directly can be used as substrate, also can be used as substrate after cutting processing.
Step S403, covers one deck copper film on the surface of film or thin plate, and copper film is etched into man-made microstructure by etching method, and the arrangement in described man-made microstructure cycle on the substrate, and then obtains Super-material antenna.
After the film being made as Super-material antenna substrate or thin plate, by covering one deck copper film on the surface of film or thin plate and being processed to form man-made microstructure to obtain Super-material antenna.Particularly, can by covering the materials such as copper, silver or aluminium on the surface of described film or thin plate to form copper film, silverskin or aluminium film etc., then by methods such as etching, plating or ion quarters, this tunic is carved into man-made microstructure, and the described man-made microstructure cycle is arranged on film or thin plate, and then obtained Super-material antenna.Certainly, also can by other modes at materials such as the electroplating surface of film or thin plate or heavy copper, silver or aluminium to form copper film, silverskin or aluminium film etc.
That carries out Super-material antenna below using polyformaldehyde, polyvinyl formal, polyvinyl acetate and polyvinyl chloride colloidal sol as high molecular polymer is made as example, sets forth manufacture method the 4th embodiment of Super-material antenna of the present invention.
Consult Fig. 5, Fig. 5 is the flow chart of manufacture method the 4th embodiment of Super-material antenna of the present invention.In the present embodiment, the manufacture method of Super-material antenna comprises the steps:
Step S501, is undertaken stirring to form uniform foams by polyformaldehyde, polyvinyl formal, polyvinyl acetate or polyvinyl chloride colloidal sol.
Polyformaldehyde, polyvinyl formal, polyvinyl acetate or polyvinyl chloride colloidal sol are added in solvent and form macromolecule polymer solution, due to the effect of gravity, macromolecule polymer solution can be divided into resin solution, suspension and solution by nature.Carry out mechanical agitation in a reservoir, air is involved in resin solution, suspension or solution and forms uniform foams.In order to beautify Super-material antenna, can also adulterate look mother in this step, to adjust shades of colour.
Foams are made into gel and solidify to form expanded material further by step S502, using the obtained film as Super-material antenna substrate or thin plate.
Foams carried out still aging or adds surfactant, make foams become gel and solidify to form expanded material, by expanded material extrusion molding, injection mo(u)lding or other method being obtained the blank of film or thin plate.Extrusion molding herein, injection molding forming method are only and illustrate, other can also be had to make the method for the blank of film or thin plate.Control film or gauge of sheet, be located between 0.001 to 4 millimeter, such as: film or gauge of sheet are 0.001 millimeter, 2 millimeters or 4 millimeters.Wherein, film or thin plate directly can be used as substrate, also can be used as substrate after cutting processing.
Step S503, covers one deck copper film on the surface of film or thin plate, and copper film is etched into man-made microstructure by etching method, and the arrangement in described man-made microstructure cycle on the substrate, and then obtains Super-material antenna.
After the film being made as Super-material antenna substrate or thin plate, by covering one deck copper film on the surface of film or thin plate and being processed to form man-made microstructure to obtain Super-material antenna.Particularly, can by covering the materials such as copper, silver or aluminium on the surface of described film or thin plate to form copper film, silverskin or aluminium film etc., then by methods such as etching, plating or ion quarters, this tunic is carved into man-made microstructure, and the described man-made microstructure cycle is arranged on film or thin plate, and then obtained Super-material antenna.Certainly, also can by other modes at materials such as the electroplating surface of film or thin plate or heavy copper, silver or aluminium to form copper film, silverskin or aluminium film etc.
That carries out Super-material antenna below using polyurethane as high molecular polymer is made as example, sets forth manufacture method the 5th embodiment of Super-material antenna of the present invention.
Consult Fig. 6, Fig. 6 is the flow chart of manufacture method the 5th embodiment of Super-material antenna of the present invention.In the present embodiment, the manufacture method of Super-material antenna comprises the steps:
Step S601, joins polyethers, vulcabond, kicker, blowing agent and foaming stabiliser in polyurethane and mixes, and stir, foam formation expanded material, using the obtained film as Super-material antenna substrate or thin plate.
In the present embodiment, choose polyethers, vulcabond, kicker, blowing agent and foaming stabiliser as raw material, after mix and blend, the inert gas generated makes the expanded foamed formation expanded material of polyurethane, by expanded material extrusion molding, injection mo(u)lding or other method being obtained the blank of film or thin plate.Extrusion molding herein, injection molding forming method are only and illustrate, other can also be had to make the method for the blank of film or thin plate.After the blank of film or thin plate is placed ageing, namely become film or thin plate.Control film or gauge of sheet, be located between 0.001 to 4 millimeter, such as: film or gauge of sheet are 0.001 millimeter, 2 millimeters or 4 millimeters.Wherein, film or thin plate directly can be used as substrate, also can be used as substrate after cutting processing.In other embodiments, also can select other raw material, now, the high molecular polymer of generation and inert gas are by different.
Step S602, covers one deck copper film on the surface of film or thin plate, and copper film is etched into man-made microstructure by etching method, and the arrangement in described man-made microstructure cycle on the substrate, and then obtains Super-material antenna.
After the film being made as Super-material antenna substrate or thin plate, by covering one deck copper film on the surface of film or thin plate and being processed to form man-made microstructure to obtain Super-material antenna.Particularly, can by covering the materials such as copper, silver or aluminium on the surface of described film or thin plate to form copper film, silverskin or aluminium film etc., then by methods such as etching, plating or ion quarters, this tunic is carved into man-made microstructure, and the described man-made microstructure cycle is arranged on film or thin plate, and then obtained Super-material antenna.Certainly, also can by other modes at materials such as the electroplating surface of film or thin plate or heavy copper, silver or aluminium to form copper film, silverskin or aluminium film etc.
Be different from the situation of prior art, the present invention is by forming expanded material by high molecular polymer foaming, again expanded material is processed into the substrate of Super-material antenna, processing process is carried out to form Super-material antenna to substrate, because foaming forms the lighter in weight of substrate, the weight of Super-material antenna can be reduced; And the substrate that foaming is formed is comparatively soft, can carry out curling, thus the transport of convenient antenna, installation and use.
The present invention also provides a kind of substrate of Super-material antenna, and the material of described substrate is the expanded material being foamed by high molecular polymer and formed.
Wherein, high molecular polymer comprises polyethylene, polyvinyl chloride, polystyrene, polyformaldehyde, polyvinyl formal, polyvinyl acetate, polyvinyl chloride colloidal sol or polyurethane.
The present invention also provides a kind of Super-material antenna, and comprise substrate and be attached to the man-made microstructure on described substrate, the material of described substrate is the expanded material being foamed by high molecular polymer and formed.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (2)
1. a Super-material antenna, is characterized in that: comprise substrate and be attached to the man-made microstructure on described substrate, described man-made microstructure is also coated with cover layer, and the material of described substrate is the expanded material being foamed by high molecular polymer and formed;
Described expanded material is stirred polyformaldehyde, polyvinyl formal, polyvinyl acetate or polyvinyl chloride colloidal sol, be made into gel after forming uniform foams and solidify to form further, or described expanded material polyethers, vulcabond, kicker, blowing agent and foaming stabiliser is joined in polyurethane to mix, and stir, formation of foaming, using the obtained film as Super-material antenna substrate or thin plate, described film or gauge of sheet are between 0.001 to 4 millimeter.
2. a manufacture method for Super-material antenna, is characterized in that, comprising:
High molecular polymer is carried out foaming and form expanded material;
Described expanded material is processed into the substrate of Super-material antenna;
Cover one deck copper film on the surface of described substrate, and described copper film is etched into man-made microstructure by etching method, the arrangement in described man-made microstructure cycle on the substrate, and covers cover layer in described man-made microstructure, and then obtains Super-material antenna;
Described step of high molecular polymer being carried out foaming formation expanded material comprises:
Polyformaldehyde, polyvinyl formal, polyvinyl acetate or polyvinyl chloride colloidal sol are stirred, is made into gel after forming uniform foams and solidify to form expanded material further, using the obtained film as Super-material antenna substrate or thin plate; Or
Polyethers, vulcabond, kicker, blowing agent and foaming stabiliser are joined in polyurethane and mix, and stir, foam formation expanded material, using the obtained film as Super-material antenna substrate or thin plate;
Wherein, control film or gauge of sheet, be located between 0.001 to 4 millimeter.
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| CN201210183153.5A CN103296470B (en) | 2012-03-02 | 2012-06-05 | The substrate of Super-material antenna, Super-material antenna and the manufacture method of Super-material antenna |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5712643A (en) * | 1995-12-05 | 1998-01-27 | Cushcraft Corporation | Planar microstrip Yagi Antenna array |
| CN101838472A (en) * | 2009-03-17 | 2010-09-22 | 日东电工株式会社 | Impact absorbing material |
| CN101950858A (en) * | 2010-09-30 | 2011-01-19 | 西北工业大学 | Broadband binary array antenna based on composite left-handed and right-handed transmission line |
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| US8300294B2 (en) * | 2009-09-18 | 2012-10-30 | Toyota Motor Engineering & Manufacturing North America, Inc. | Planar gradient index optical metamaterials |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5712643A (en) * | 1995-12-05 | 1998-01-27 | Cushcraft Corporation | Planar microstrip Yagi Antenna array |
| CN101838472A (en) * | 2009-03-17 | 2010-09-22 | 日东电工株式会社 | Impact absorbing material |
| CN101950858A (en) * | 2010-09-30 | 2011-01-19 | 西北工业大学 | Broadband binary array antenna based on composite left-handed and right-handed transmission line |
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