On Tue, 8 Feb 2011 08:29:47 -0800 (PST), larwe <zwsdotcom@gmail.com>
wrote:

>This is actually for a school project... so warning in advance!
>
>I would like to simulate an antenna design - exactly one. A very
>simple antenna; it's supposed to be a receiver for UHF digital TV
>signals. What I'd ideally like is a 3D estimated plot of the pattern
>after drawing in the basic geometry. I could build one and scope it
>out with a sig gen and a spectrum analyzer, but this will involve
>borrowing equipment from people with whom I no longer have a strong
>relationship.
>
>Or I could sit down and mess about with the math and plot points by
>hand - which I guess I am up to do if there is no choice. But is there
>a piece of software - demo version would be fine - that will save me
>some work?

4nec2 is the usual tool for this... and it's free!
http://home.ict.nl/~arivoors/

And here's a starting point for one UHF design that has gotten good
results http://www.digitalhome.ca/ota/superantenna/. They include 4nec2
antenna patterns for some configurations, as well.

-- 
Rich Webb     Norfolk, VA

On Feb 8, 4:29=A0pm, larwe <zwsdot...@gmail.com> wrote:
> This is actually for a school project... so warning in advance!
>
> I would like to simulate an antenna design - exactly one. A very
> simple antenna; it's supposed to be a receiver for UHF digital TV
> signals. What I'd ideally like is a 3D estimated plot of the pattern
> after drawing in the basic geometry. I could build one and scope it
> out with a sig gen and a spectrum analyzer, but this will involve
> borrowing equipment from people with whom I no longer have a strong
> relationship.
>
> Or I could sit down and mess about with the math and plot points by
> hand - which I guess I am up to do if there is no choice. But is there
> a piece of software - demo version would be fine - that will save me
> some work?
>
> Thanks.

http://mmhamsoft.amateur-radio.ca/pages/mmana-gal.php

Leon

This is actually for a school project... so warning in advance!

I would like to simulate an antenna design - exactly one. A very
simple antenna; it's supposed to be a receiver for UHF digital TV
signals. What I'd ideally like is a 3D estimated plot of the pattern
after drawing in the basic geometry. I could build one and scope it
out with a sig gen and a spectrum analyzer, but this will involve
borrowing equipment from people with whom I no longer have a strong
relationship.

Or I could sit down and mess about with the math and plot points by
hand - which I guess I am up to do if there is no choice. But is there
a piece of software - demo version would be fine - that will save me
some work?

Thanks.