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Parabolic antenna

Parabolic antenna

Parabolic antenna

(OP)
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 .....

RE: Parabolic antenna

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

RE: Parabolic antenna

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).

RE: Parabolic antenna

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.

RE: Parabolic antenna

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.

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