Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
General Topics
Pictures of Members' Setups and general satellite
Lutenna - The antenna made of Sugar
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="casser" data-source="post: 622912" data-attributes="member: 264731"><p>Hi..</p><p></p><p>Unfortunately since April i stopped the project..but i hope that in August start working on it again.</p><p></p><p>Some people from Portugal and Brazil made the antenna with different materials, but nothing new, sugar and granulated Polystyrene are confirmed materials but nothing more. Also like i said before, bigger antenna versions using only one dielectric material doesnt perform any good..a 40cm version work like a 25/30cm.</p><p></p><p>Maybe the Loss Tangent is messing up in bigger versions, since the signal must pass throught a lot more material (remember that doubling the diameter of the antenna, you will not double the volume of the antenna..is a lot more!!).</p><p></p><p>The PDF file have some mistakes, but 90% of the information is here in this topic..i´ll try to make a new PDF.</p><p></p><p>@Satcom1, i think that these sphericall antennas have good FC..since is much more critical to find the FC in a sphere rather than in a Dish and since my version of 20cm can achieve 120% efficiency with a normal LNBF...maybe bigger versions need another type of Horn, with different aperture? But your idea is good to try, maybe in a simulation software first?<img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p><p></p><p>A Portuguese video of the antenna (made by Houls, user from Dragteam.info)</p><p>_http://www.youtube.com/watch?v=l8_LbCmZfLQ</p><p></p><p>New farragsat 40cm version</p><p>_http://www.youtube.com/watch?v=auwm-yQWHQ8</p><p></p><p>1ºpicture-> a 25cm VS 40cm, same performance.</p><p>2ºpic-> 25cm version</p><p>3º My homemade half-ball, bad results</p></blockquote><p></p>
[QUOTE="casser, post: 622912, member: 264731"] Hi.. Unfortunately since April i stopped the project..but i hope that in August start working on it again. Some people from Portugal and Brazil made the antenna with different materials, but nothing new, sugar and granulated Polystyrene are confirmed materials but nothing more. Also like i said before, bigger antenna versions using only one dielectric material doesnt perform any good..a 40cm version work like a 25/30cm. Maybe the Loss Tangent is messing up in bigger versions, since the signal must pass throught a lot more material (remember that doubling the diameter of the antenna, you will not double the volume of the antenna..is a lot more!!). The PDF file have some mistakes, but 90% of the information is here in this topic..i´ll try to make a new PDF. @Satcom1, i think that these sphericall antennas have good FC..since is much more critical to find the FC in a sphere rather than in a Dish and since my version of 20cm can achieve 120% efficiency with a normal LNBF...maybe bigger versions need another type of Horn, with different aperture? But your idea is good to try, maybe in a simulation software first?:) A Portuguese video of the antenna (made by Houls, user from Dragteam.info) _http://www.youtube.com/watch?v=l8_LbCmZfLQ New farragsat 40cm version _http://www.youtube.com/watch?v=auwm-yQWHQ8 1ºpicture-> a 25cm VS 40cm, same performance. 2ºpic-> 25cm version 3º My homemade half-ball, bad results [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
General Topics
Pictures of Members' Setups and general satellite
Lutenna - The antenna made of Sugar
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top