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ඩයලොග් 3G සිග්නල් ඇදගන්න ඔනි HELP....

W

wksm

Member
Aug 10, 2013
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ඩයලොග් 3G සිග්නල් ඇදගන්න ඔනි HELP....

මචන්ලා මගෙ කාමරේට ඩයලොග් 2G ෆූල් තියෙ 3G නෑ බන්
ඒ උනාට අපේ ගේ ඉදන් මීටර් 75ක් 100 විතර එහාට 3G ෆුල් තියෙ බන්:growl::sorry:
ඒ හරියෙ ගෙවල් නෑ කෑලෑව :baffled:
සිග්නල් නැති වෙන්න හේතුව කන්දක් නිසා අපේ ගේ කවර් වෙලා තියෙන්නෙ ටවර් එකට, අර මන් කිව්ව හරියට යනකොට කන්ද මඟහැරිලා ටික ටික ටවර් එකට ඔපන් වෙනවා.:(
මන් ඉන්න තැනට සිග්නල් ඇද ගන්න ක්‍රමය්ක් නැද්ද මචන්ලා
එපා වෙලා ඉන්නෙ මඟුල:(:(:(
 
WhiteWalker

WhiteWalker

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Sep 15, 2015
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http://news.mit.edu/2012/new-metamaterial-lens-focuses-radio-waves-1114

New metamaterial lens focuses radio waves
Device could improve satellite and molecular imaging.

In many respects, metamaterials are supernatural. These manmade materials, with their intricately designed structures, bend electromagnetic waves in ways that are impossible for materials found in nature. Scientists are investigating metamaterials for their potential to engineer invisibility cloaks — materials that refract light to hide an object in plain sight — and “super lenses,” which focus light beyond the range of optical microscopes to image objects at nanoscale detail.
Researchers at MIT have now fabricated a three-dimensional, lightweight metamaterial lens that focuses radio waves with extreme precision. The concave lens exhibits a property called negative refraction, bending electromagnetic waves — in this case, radio waves — in exactly the opposite sense from which a normal concave lens would work.
Concave lenses typically radiate radio waves like spokes from a wheel. In this new metamaterial lens, however, radio waves converge, focusing on a single, precise point — a property impossible to replicate in natural materials.
For Isaac Ehrenberg, an MIT graduate student in mechanical engineering, the device evokes an image from the movie “Star Wars”: the Death Star, a space station that shoots laser beams from a concave dish, the lasers converging to a point to destroy nearby planets. While the researchers’ fabricated lens won’t be blasting any planetary bodies in the near future, Ehrenberg says there are other potential applications for the device, such as molecular and deep-space imaging.
“There’s no solid block of any material in the periodic table which will generate this effect,” Ehrenberg says. “This device refracts radio waves like no other material found in nature.”
Ehrenberg published the results of his research in the Journal of Applied Physics. His co-authors on the paper are Sanjay Sarma, the Fred Fort Flowers and Daniel Fort Flowers Professor of Mechanical Engineering at MIT, and Bae-Ian Wu, a researcher at the Air Force Research Laboratory.
Shaping a cell
A metamaterial’s extraordinary properties are determined largely by its structure — similar to how a diamond’s crystals impart strength. A material can refract light differently depending on the shape of individual units within a material, and the arrangement of those units as a whole.
Prior to this recent paper, Wu and others have studied how certain shapes of metamaterials can affect the propagation of electromagnetic waves. The team came up with a blocky, S-shaped “unit cell” whose shape refracts radio waves in particular directions. Ehrenberg used the unit shape as the basis for his concave lens, creating the rough shape from more than 4,000 unit cells, each only a few millimeters wide.
To fabricate his design, Ehrenberg utilized 3-D printing, building a lens layer by intricate layer from a polymer solution. He then washed away any residue with a high-pressure water jet and coated each layer with a fine mist of copper to give the lens a conductive surface.
To test the lens, the researchers placed the device between two radio antennae and measured the energy transmitted through it. Ehrenberg found that most of the energy was able to travel through the lens, with very little lost within the metamaterial — a significant improvement in energy efficiency when compared with past negative-refraction designs. The team also found that radio waves converged in front of the lens at a very specific point, creating a tight, focused beam.
Imaging space and beyond
Sarma says the combination of the device’s “low loss” and tight focus is a promising step toward engineering practical metamaterial lenses.
“There are a lot of phenomena in the world that you can demonstrate, but whether you can achieve it at scale is the issue,” Sarma says. “We’ve taken the negative refraction concept from the realm of proof-of-concept to the realm of practicality.”
The device, which weighs less than a pound, may be used to focus radio waves precisely on molecules to create high-resolution images — images that are currently produced using bulky, heavy and expensive lenses. Ehrenberg says that such a lightweight device could also be mounted on satellites to image stars and other celestial bodies in space, “where you don’t want to bring up a hefty lens.”
Cheng Sun, an assistant professor of mechanical engineering at Northwestern University, says the metamaterial design is a promising demonstration that may lead to stronger, faster telecommunications.
“The low-loss design can be considered a significant step forward toward practical applications at microwave or radio-frequencies ranges,” Sun says.
Beyond the lens’ applications, Ehrenberg says its fabrication is simple and easily replicated, allowing other scientists to investigate 3-D metamaterial designs.
“You can really fully explore the space of metamaterials,” Ehrenberg says. “There’s a whole other dimension that now people will be able to look into.”

BUMP :dull: :dull:
 
W

wksm

Member
Aug 10, 2013
649
38
0
WhiteWalker said:
http://news.mit.edu/2012/new-metamaterial-lens-focuses-radio-waves-1114

New metamaterial lens focuses radio waves
Device could improve satellite and molecular imaging.

In many respects, metamaterials are supernatural. These manmade materials, with their intricately designed structures, bend electromagnetic waves in ways that are impossible for materials found in nature. Scientists are investigating metamaterials for their potential to engineer invisibility cloaks — materials that refract light to hide an object in plain sight — and “super lenses,” which focus light beyond the range of optical microscopes to image objects at nanoscale detail.
Researchers at MIT have now fabricated a three-dimensional, lightweight metamaterial lens that focuses radio waves with extreme precision. The concave lens exhibits a property called negative refraction, bending electromagnetic waves — in this case, radio waves — in exactly the opposite sense from which a normal concave lens would work.
Concave lenses typically radiate radio waves like spokes from a wheel. In this new metamaterial lens, however, radio waves converge, focusing on a single, precise point — a property impossible to replicate in natural materials.
For Isaac Ehrenberg, an MIT graduate student in mechanical engineering, the device evokes an image from the movie “Star Wars”: the Death Star, a space station that shoots laser beams from a concave dish, the lasers converging to a point to destroy nearby planets. While the researchers’ fabricated lens won’t be blasting any planetary bodies in the near future, Ehrenberg says there are other potential applications for the device, such as molecular and deep-space imaging.
“There’s no solid block of any material in the periodic table which will generate this effect,” Ehrenberg says. “This device refracts radio waves like no other material found in nature.”
Ehrenberg published the results of his research in the Journal of Applied Physics. His co-authors on the paper are Sanjay Sarma, the Fred Fort Flowers and Daniel Fort Flowers Professor of Mechanical Engineering at MIT, and Bae-Ian Wu, a researcher at the Air Force Research Laboratory.
Shaping a cell
A metamaterial’s extraordinary properties are determined largely by its structure — similar to how a diamond’s crystals impart strength. A material can refract light differently depending on the shape of individual units within a material, and the arrangement of those units as a whole.
Prior to this recent paper, Wu and others have studied how certain shapes of metamaterials can affect the propagation of electromagnetic waves. The team came up with a blocky, S-shaped “unit cell” whose shape refracts radio waves in particular directions. Ehrenberg used the unit shape as the basis for his concave lens, creating the rough shape from more than 4,000 unit cells, each only a few millimeters wide.
To fabricate his design, Ehrenberg utilized 3-D printing, building a lens layer by intricate layer from a polymer solution. He then washed away any residue with a high-pressure water jet and coated each layer with a fine mist of copper to give the lens a conductive surface.
To test the lens, the researchers placed the device between two radio antennae and measured the energy transmitted through it. Ehrenberg found that most of the energy was able to travel through the lens, with very little lost within the metamaterial — a significant improvement in energy efficiency when compared with past negative-refraction designs. The team also found that radio waves converged in front of the lens at a very specific point, creating a tight, focused beam.
Imaging space and beyond
Sarma says the combination of the device’s “low loss” and tight focus is a promising step toward engineering practical metamaterial lenses.
“There are a lot of phenomena in the world that you can demonstrate, but whether you can achieve it at scale is the issue,” Sarma says. “We’ve taken the negative refraction concept from the realm of proof-of-concept to the realm of practicality.”
The device, which weighs less than a pound, may be used to focus radio waves precisely on molecules to create high-resolution images — images that are currently produced using bulky, heavy and expensive lenses. Ehrenberg says that such a lightweight device could also be mounted on satellites to image stars and other celestial bodies in space, “where you don’t want to bring up a hefty lens.”
Cheng Sun, an assistant professor of mechanical engineering at Northwestern University, says the metamaterial design is a promising demonstration that may lead to stronger, faster telecommunications.
“The low-loss design can be considered a significant step forward toward practical applications at microwave or radio-frequencies ranges,” Sun says.
Beyond the lens’ applications, Ehrenberg says its fabrication is simple and easily replicated, allowing other scientists to investigate 3-D metamaterial designs.
“You can really fully explore the space of metamaterials,” Ehrenberg says. “There’s a whole other dimension that now people will be able to look into.”

BUMP :dull: :dull:
Click to expand...

mey mona hu.... bn:sorry::sorry:
 
RandomGuy

RandomGuy

Well-known member
  • Oct 15, 2014
    17,379
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    wksm said:
    මචන්ලා මගෙ කාමරේට ඩයලොග් 2G ෆූල් තියෙ 3G නෑ බන්
    ඒ උනාට අපේ ගේ ඉදන් මීටර් 75ක් 100 විතර එහාට 3G ෆුල් තියෙ බන්:growl::sorry:
    ඒ හරියෙ ගෙවල් නෑ කෑලෑව :baffled:
    සිග්නල් නැති වෙන්න හේතුව කන්දක් නිසා අපේ ගේ කවර් වෙලා තියෙන්නෙ ටවර් එකට, අර මන් කිව්ව හරියට යනකොට කන්ද මඟහැරිලා ටික ටික ටවර් එකට ඔපන් වෙනවා.:(
    මන් ඉන්න තැනට සිග්නල් ඇද ගන්න ක්‍රමය්ක් නැද්ද මචන්ලා
    එපා වෙලා ඉන්නෙ මඟුල:(:(:(
    Click to expand...

    Tho matara neda?
     
    WhiteWalker

    WhiteWalker

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    wksm said:
    mey mona hu.... bn:sorry::sorry:
    Click to expand...

    මෙටා මැටීරියල් වලිං කාච වලිං ආලෝකයට එක එක එව්ව කරනව වගේ රේඩියෝ සිග්නල් වලට එක එක එව්ව කරන්න පුළුවන් එකක් හදල :baffled: :baffled:
    මුට ඒකක් අරං සිග්නල් එන තැනට සෙට් කලානං පෙරිස්කෝප් එකක් වගේ ගෙදට්ට සිග්නල් ගත්තෑකි :baffled: :baffled:
     
    W

    wksm

    Member
    Aug 10, 2013
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    WhiteWalker said:
    මෙටා මැටීරියල් වලිං කාච වලිං ආලෝකයට එක එක එව්ව කරනව වගේ රේඩියෝ සිග්නල් වලට එක එක එව්ව කරන්න පුළුවන් එකක් හදල :baffled: :baffled:
    මුට ඒකක් අරං සිග්නල් එන තැනට සෙට් කලානං පෙරිස්කෝප් එකක් වගේ ගෙදට්ට සිග්නල් ගත්තෑකි :baffled: :baffled:
    Click to expand...

    :baffled::baffled::baffled:
     
    vinura kithmal

    vinura kithmal

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  • Oct 19, 2014
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    සිංහලේ
    Uba android phone ekak use karanawa nam
    Opensignal app eka daagena balapang ubata signal ena tower eka koheda tiyenne
    Kochara durada kiyala
    Settings> about phone gihilla balapang kochara power da kiyala ube signal range eka
    -60 ta adui kiyanne supiri
    -60 th -90th athare kiyanne shape (ape gewal gariyata 83i 85i 13-15mbps wage server speed ekak tiyenawa)
    Ube -90 tath adui nam dialog ekata request ekak daapang tower ekak hai karanna kiyala :P
    3G signal na kiyala kiyapan appeal ekak daala
    Ubata open signal app eken balaaganna puluwan tower ekata kochara dura tiyenawada kiyalath
     
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