On 10 Oct 2012 11:40, Baidoo-Williams, Henry E wrote:
Thanks a lot Marcus and Matt. Marcus, can you please share the
schematics of your custom filter board with distributed gain and
filtering? That will be of much help and we can easily incorporate it
knowing there are no bugs. And can you help us with the antenna you are
using? I called ettus and they don’t have any antenna to go with the
basix RX/TX and they have no recommendations also. Can anyone help.
H. E. Baidoo-Williams,
GRA, University of Iowa
can’t share the schematics, it was part of a contract I did for a
scientific instrument company.
I used a cross-dipole antenna designed
for the frequency range of interest, and designed to project a
largely-circular pattern on the sky overhead.
The type of antenna you
need depends heavily on your application, and there are a lot of
antenna companies out there that can meet various needs. The antenna we
used was custom-built.
You might look at the research done by these
folks, and the low-frequency radio astronomy folks in general:
But, it really depends on your
Cushcrafts makes a “Ringo Ranger” antenna – there’s a
6-meter and 10-meter version, and they can both be tuned fairly widely
– I used a 6M Ringo Ranger for meteor studies earlier this year,
re-tuned it for TV channel 4.