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On 05/07/2011 05:28 PM, David Bengtson wrote:
That’s a pretty aggressive goal, to hit 5W over the USRP BW. To get
reasonable linearity, you’re probably looking at something that draws
25W of DC power. An external Amp is probably off the shelf. For
example, Minicircuits has a TIA-1000 that does 4+ watts out from 100
to 1000 MHz for $2000. You’re probably going to need post PA filtering
to eliminate harmonics and spurious as well.
Yeah, Marcus pointed me to the Minicircuits site. Pretty impressive
stuff. Here in Europe, you mainly get the usualy band-limited amps off
the shelf, like HF, 2m, 70cm, etc.
I’m pretty new to the whole SDR-stuff and not totally familiar with
everything yet. I had the chance to look into a commercial SDR some time
ago which was making 5W from 30 to 512MHz and at least I couldn’t figure
out any amp module in there, so I assumed, the 5W came directly from the
SDR core - which Marcus told me is highly unlikely.
I’m still wondering about how to realize a system with a high bandwidth
(basically like the WBX but actually, we only need to go up to about
950MHz) without the need for several amps and/or filters while still
keeping the harmonics and spurious in check.
The main goal is ease of operation, i.e. the operator shouldn’t need to
think about switching cables/hitting RF switches depending on the RF
(o_ Stefan Gofferje | SCLT, MCP, CCSA
//\ Reg’d Linux User #247167 | VCP #2263
V_/_ Heckler & Koch - the original point and click interface
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