Re: [Discuss-gnuradio] NOAA antenna

[Patrik Tast]

Hi

Here is the 137 MHz RHCP antenna we have developed
http://www.poes-weather.com/download/jm-dca/

This antenna will give you better performance at low satellite elevations (horizons).
It is easy to build and you don't have to be that careful. 
We don't use a pre-amp if coax < 15 m (loss ~2 dB RG-58).

--
Best Regards,
Patrik Tast

POES-Weather Ab Ltd Remote Sensing
Business id: FI 23624190
CEO Patrik Tast
GSM: +358 40 833 11 70
Street address: Furuskogsvägen 89
Postal code: 65280
City: Vasa
Country: Finland
Web: poes-weather.com

-----Original Message-----
From: John Coppens <address@hidden>
To: address@hidden
Subject: Re: [Discuss-gnuradio] NOAA antenna
Date: Wed, 15 May 2013 13:29:09 -0300

On Wed, 15 May 2013 08:29:59 -0400
"Marcus D. Leech" <address@hidden> wrote:

> I think a lot of people use a QFH antenna, or a turnstile antenna for 
> NOAA satellites at 137Mhz.

Note that you will almost certainly need an antenna amplifier too (unless
you make a huge antenna ;) Even a specialized receiver needs one to
compensate for the cable loss. And the ezcap receiver is not too 
sensitive either...

As Marcus stated, many use QFH antennas (sometimes called QHA), though
many also use turnstiles (two, crossed dipoles) because it looks easier
to build.

If interested, there's some info you might find interesting on my site:

http://www.jcoppens.com/ant/qfh/index.en.php  (QFH antenna construction)
http://www.jcoppens.com/sat/gaasfet/index.en.php (Example antenna amp)

John

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio