Well it all depends if you are have issues with RF noise/leakage in what
you are using Hack RF for.
I just wrapped the plastic case of mine with aluminum foil. If you have
some copper and can solder it into a box shape to fit snugly around most
sides of the plastic case, it will probably be better since by soldering
you will eliminate rf currents leaking around breaks in the shield.
For a solid shield all around, virtually any conductive metal will work
as long as you take to take care to make sure there are no gaps/longs
slits in the shield where pieces of metal join.
But according to Luis, the NooElec shield
http://www.nooelec.com/store/sdr/sdr-accessories/hackrf-rf-shield.html
does a good job, presumably shielding the entire RF section which is all
that really matters and would be a much more professional solution (and
only cost $10 or so).
I just ordered one so I should know how well it works for me in a week
or so.
On 4/4/2016 11:55 AM, Iluta V wrote:
Copper shielding probably is the best. I have some extra copper, would
you suggest to make such a shield?
Wiki - RF shielding enclosures filter a range of frequencies for
specific conditions. Copper is used for radio frequency (RF) shielding
<https://en.wikipedia.org/wiki/Copper_in_architecture#Radio_frequency_shielding>
because it absorbs radio <https://en.wikipedia.org/wiki/Radio_wave>
and magnetic waves <https://en.wikipedia.org/wiki/Magnetic_wave>.
Properly designed and constructed copper RF shielding
<https://en.wikipedia.org/wiki/Copper_in_architecture#Radio_frequency_shielding>
enclosures satisfy most RF shielding needs.
On Mon, Apr 4, 2016 at 6:51 PM, n0p [Luis Bernal] <[email protected]
<mailto:[email protected]>> wrote:
Once you solder the shields, there's not much difference on using
a metallic enclosure or not
I've tried it around all sorts of RF noise sources with all four
combinations of shields/enclosure.
The aluminium enclosure is pretty nice and it protects the HackRF
if you keep it in your backpack like me, but it doesn't do much
for RF shielding once you have the shields.
2016-04-04 17:18 GMT+02:00 Peter Jones <[email protected]
<mailto:[email protected]>>:
A few notes to anyone else having issues with noise and
instability:
After playing with Hack RF for about a week, I have found that
1) Placing the HackRF unit on top of a computer adds so much
noise it cant receive much of anything. Place the HackRF unit
as far from the computer as the USB cable permits. For about a
day I couldn't figure out why I could not receive FM stations
with gnuradio-companion even though everything seemed fine.
2) Particularly in the GHz bands, even simple shielding makes
a huge difference. I covered my unit with aluminum foil (which
I clipped to one of the clock SMA connector to ground it) and
performance improved dramatically. I am going to try the
NooElec enclosure kit and RF Shield and how well they work.
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--
Peter Jones PhD. PEng.
www.versiontwo.ca
Tel (613) 663-3004 x223
Cell (613) 451-4322
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