On Tue, Dec 20, 2005 at 03:30:56PM -0500, Marcus Leech wrote: > Paul Shuch was working on a phased-array panel antenna for > SETI work. I don't know how many elements, but it was > steered using varactors. For some environments, this would > be really nice--no need to build mechanicals to swing a dish > around. > > On the down side, a phased-array patch antenna is potentially a lossy > thing, so useless for weak-signal work like EME and radio astronomy. > Unless you have an LNA at every element in the array. Which maps into > $$$.
For narrow-band arrays (bandwidth < 1% of center freq), we think we can steer the array with DSP in the FPGA and/or host. This would allow us to build 4 antenna arrays with a single USRP. Good introductory textbook: "Adaptive Array Systems", Allen & Ghavami, ISBN 0-470-86189-4 Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
