Passive repeating is all about aperture area. Your passive repeater needs to capture enough energy to effectively reradiate any. That is why the most effective passive repeaters are very near one end of a link or the other. The worst place for a passive repeater (in general) is exactly in the center of a path. You want the energy leaving one site to be effectively coupled into the passive repeater dish, and the farther the energy travels, the more it disperses.
Now, looking at the orginial story: http://www.pbs.org/cringely/pulpit/pulpit20020207.html we see cringly is 1.5 miles from the passive repeater, and his target is 5 miles from the passive repeater. He has optical line of sight to both locations, and one could surmise that he is out of the fresnal zones for both (since his site is on a hill). His hilltop Yagi's are ~ 14db gain http://www.oreillynet.com/cs/weblog/view/wlg/448 http://www.netscum.com/~clapp/wireless.html and he says at his home he has a 100mw WAP11 with a 21 db dish. So, I can't say if it worked, but their should be enough data here to determine if it could have worked, assuming panel antennas at Sonic net near the legal limit for erp -- Jeff King, [EMAIL PROTECTED] on 01/11/2004 On Sat, 10 Jan 2004 12:34:16 -0800, Glenn Fleishman wrote: >Brian Lloyd <[EMAIL PROTECTED]> wrote: > >>>I'm still waiting for him to explain his magic passive repeater, >>>as >are >>>we all. >> >>I have used back-to-back dish antennas with no amplification to get >> signal over a hill. This has long been used in microwave circles. > >I said "his" magic passive repeater, not passive repeating in >general. Follow my link to Rob Flickenger's essay from Feb. 2002. >---------------------------------------------------------------------- -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
