Parabolic antenna

[Yan75]

Hello..

I am planning to fabricate a 6 ft mesh type parabolic antenna. I'll be using it for a C Band satellite TVRO.

Could any body help me with the design ?

Do you have any available diagrams and dimenssion ?

Thank you and more power .....

 

[jbartos]

Suggestion: Visit

http://www.setileague.org/hardware/parabola.htm

http://www.cwc.nus.edu.sg/~chenzn/MC6-antenna.pdf

etc. for more info

 

[jbartos]

Suggestion: Visit

http://www.telsat.com/garyb.htm

etc. for more info

 

[Yan75]

thanks j.
but there would be any simplified design/diagrams?

 

[photistor]

Review Chapter 17 from "Antenna Engineering Handbook" second edition edited by Johnson and Jasik. Many university engineering libraries carry this book (as opposed to purchasing).

 

[SixTwelve]

I've been searching casually for this information for some time. The .pdf referenced by jbartos is the *first time I've even found numbers. What's so frustrating about the search, though, is that it should be so simple. y = ax^2 + bx + c. Differential theta summation -or whatever- just shouldn't be in it.

I have to assume the name is a dirty, dirty lie, as there's just not a website telling us the three missing variables. Gotta figure distance of the microphone from formost edge of the disk is one. Counter-intuitive as it is with a 3d object, I don't believe there's a Z. (X = distance from disk's radial center, Y = depth from rim.) So what remaining variables there are is a mystery.

Ah, well. If you get anywhere, Yan, I hope you'll let me know.

*=Actually, I got a formula from an e-mail group I was on. Naturally this evil datum let smoke out of that PC within a day or two, so I didn't get a chance to write it down, back it up or test it. Dunno if it was even valid. I tell myself, of course, that it wasn't.

 

[VEBill]

Are you sure that 6-foot will be sufficient for C-band TVRO? I recently read that 7.5-foot was the smallest practical size - assuming that you're using a good, state of the art, LNBF.