Re: [Discuss-gnuradio] Re: WBX

[Marcus D. Leech]

On 01/14/2010 05:52 PM, Veljko Pejovic wrote:
> Hi Matt,
>
>
> Is there an approximate release date for USRP2 driver?
>
> Also, which type of antenna do you suggest for the WBX.
>
> Thanks,
>
>
> Veljko
>
>    
Really, if you're going to be using the full range of the WBX, you 
should probably use something
  like a discone antenna for Rx, but for xmit, you really want 
something that offers a low VSWR
  at the operating frequency, and it's *really hard* to get an 
efficient antenna that works
  reasonably well for Tx over the entire range of the WBX.

Antennae like the LP026, I believe, use an collinear-coaxial approach to 
providing coverage
  over a couple of discrete bands.  This "trick" doesn't work that well 
for continuous low-VSWR
  coverage over many many octaves of bandwidth (for the WBX, we're 
talking a high:low
  wavelength ratio of 44:1 !!!).

Up to the low-end of UHF frequencies, one might consider a TV log-periodic.

Cheers
Marcus