On Sat, 2008-10-11 at 11:08 +1030, Berndt Josef Wulf wrote: > On Saturday 11 October 2008 09:14:48 Steve Totaro wrote: > > On Fri, Oct 10, 2008 at 4:20 PM, John Ackermann N8UR <[EMAIL PROTECTED]> > > wrote: > > > rhubbell wrote: > > >> Hi all, > > >> > > >> After being on-frequency here for a little while I can see that the > > >> range of experience/expertise is wide. Which is great. > > >> > > >> I'm curious if any long-timers have begun to look at software defined > > >> antennas? Or is there any effort at all anywhere in the public domain? > > >> I guess military and universities don't really count for public as much > > >> as they once did, but I'd guess they're working toward SDA also. > > > > > > I'm not sure just what you mean by "software defined antenna" but Vic > > > Kean, K1LT, has been using an array of short vertical antennas fed to > > > multiple ADCs and phased in software to receive on the 160M amateur band. > > > I don't have URLs handy, but I know he's made some postings about his > > > work. Searching for "K1LT" and "SDR" would be a good start. > > > > > > John > > > > I could see a software controlled antennae, using software to control reed > > switches and servos, but not a strictly software defined antennae, more > > like a robotic antennae that could be populated with standard or predefined > > settings for the antennae configuration, as well as manual control. > > > > I have a software controlled wifi antennae on my chimney, the software just > > controls a servo for direction. > > > > I have this guy, which kicks butt and has come down in price quite a bit > > http://cgi.ebay.com/WiFi-USB-24-dBi-YAGI-ANTENNA-2-4GHz-ULTRA-LONG-RANGE_W0 > >QQitemZ270284630828QQihZ017QQcategoryZ86720QQssPageNameZWDVWQQrdZ1QQcmdZView > >Item > > > > Haven't used it in ice/snow but i assume that will be a problem and require > > some kind of covering to keep the elements that stick off, jerking the > > servo takes care of water build up from rain that can and does degrade wifi > > signals. > > Systems such as an over-the-horizon radar, such as the Jindalee project in > Australia, are possibly as close as it gets to be a SDA. It involves a little
That sounds interesting. Will have a look. > more than just an antenna rotator controller... Right, not antenna position control. > > 73, Berndt > VK5ABN > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
