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Lutenna - The antenna made of Sugar
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<blockquote data-quote="casser" data-source="post: 709825" data-attributes="member: 264731"><p>I´ve abandoned this project a long time ago <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/sad.png" class="smilie" loading="lazy" alt=":(" title="Sad :(" data-shortname=":(" /> The main reason was i couldnt find other good dielectric materials to test.. i went to 2 styrofoam factories asking if they sell me a bag of polystyrene..but they refuse to sell/give.</p><p></p><p>Also my "original" idea is a bit wrong..a high performance lens sphere antenna need to have several layers of different dielectric materials.. see attach files to check a comparision from a sphere antenna with several layers. Althought a single layer dielectric sphere antenna works very good with small dimensions (100/200mm), bigger than that, it requires several layers, i cant give a theoretical explanation why this happen, but this what i think.</p><p></p><p>But..</p><p></p><p>A well known antenna manufacturer - Wavefrontier - has a spherical antenna of 750mm and 1000mm</p><p>-http://www.wavefrontier.com/wave/sphere.htm</p><p>brief explanation of the antenna</p><p>-http://www.wavefrontier.com/wave/technology.htm tech review</p><p></p><p>[warning]No live links please as per forum rules[/warning]</p><p></p><p>Since they only refer to polystyrene..so i believe it´s one layer only antenna<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite53" alt=":confused" title="Confused :confused" loading="lazy" data-shortname=":confused" /></p></blockquote><p></p>
[QUOTE="casser, post: 709825, member: 264731"] I´ve abandoned this project a long time ago :( The main reason was i couldnt find other good dielectric materials to test.. i went to 2 styrofoam factories asking if they sell me a bag of polystyrene..but they refuse to sell/give. Also my "original" idea is a bit wrong..a high performance lens sphere antenna need to have several layers of different dielectric materials.. see attach files to check a comparision from a sphere antenna with several layers. Althought a single layer dielectric sphere antenna works very good with small dimensions (100/200mm), bigger than that, it requires several layers, i cant give a theoretical explanation why this happen, but this what i think. But.. A well known antenna manufacturer - Wavefrontier - has a spherical antenna of 750mm and 1000mm -http://www.wavefrontier.com/wave/sphere.htm brief explanation of the antenna -http://www.wavefrontier.com/wave/technology.htm tech review [warning]No live links please as per forum rules[/warning] Since they only refer to polystyrene..so i believe it´s one layer only antenna:confused: [/QUOTE]
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Lutenna - The antenna made of Sugar
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