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Lutenna - The antenna made of Sugar
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<blockquote data-quote="casser" data-source="post: 593307" data-attributes="member: 264731"><p>Sugar is the only material that i know thar work..but it´s probably the worse material, 2 days in the outside, the sugar will crystallize.</p><p></p><p>The material like i said before, should have a dielectric constant between 1.6 and 2.2 and it should not be very lossy at 11.75Ghz.</p><p></p><p>Check this sites, and search for better materials:</p><p></p><p>_http://www.clippercontrols.com/info/dielectric_constants.html</p><p>_http://www.deltacnt.com/99-00032.htm</p><p>_http://www.rafoeg.de/20,Dokumentenarchiv/20,Daten/dielectric_chart.pdf</p><p></p><p></p><p></p><p>This is not a dish..this is a dielectric spherical antenna, only the version with reflector have metal, all others doesnt have a bit of metal on it.</p><p></p><p>The shape of the Sphere is what makes the signal focal to a point, but the distance of the FC to the antenna is determined by the dielectric constant of the material, not by the size of the sphere..example for a Sphere (not real values): </p><p></p><p>Sugar have DC=2.0</p><p></p><p>-In a 20cm diameter version, the focal point is at 30mm of the antenna </p><p>-In a 40cm diameter version, the focal point is at 30mm of the antenna.</p><p></p><p>Cadmium oxide, DC=1.6</p><p></p><p>-In a 20cm diameter version, the focal point is at 100mm of the antenna</p><p>...</p></blockquote><p></p>
[QUOTE="casser, post: 593307, member: 264731"] Sugar is the only material that i know thar work..but it´s probably the worse material, 2 days in the outside, the sugar will crystallize. The material like i said before, should have a dielectric constant between 1.6 and 2.2 and it should not be very lossy at 11.75Ghz. Check this sites, and search for better materials: _http://www.clippercontrols.com/info/dielectric_constants.html _http://www.deltacnt.com/99-00032.htm _http://www.rafoeg.de/20,Dokumentenarchiv/20,Daten/dielectric_chart.pdf This is not a dish..this is a dielectric spherical antenna, only the version with reflector have metal, all others doesnt have a bit of metal on it. The shape of the Sphere is what makes the signal focal to a point, but the distance of the FC to the antenna is determined by the dielectric constant of the material, not by the size of the sphere..example for a Sphere (not real values): Sugar have DC=2.0 -In a 20cm diameter version, the focal point is at 30mm of the antenna -In a 40cm diameter version, the focal point is at 30mm of the antenna. Cadmium oxide, DC=1.6 -In a 20cm diameter version, the focal point is at 100mm of the antenna ... [/QUOTE]
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Lutenna - The antenna made of Sugar
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