I agree the pair of 2.4GHz radios in a box is a problem. NoCat reached this conclusion after some experiments reported here and on their list, and I've seen the same issue with sflan and also a report out of the UK.
I know of four possible solutions: 1) separate the radios by at least 10 feet 2) house the radios in separate shielded enclosures 3) use 2.4 and 5.8 GHz 4) use a board with grounding plane to attach emi shielding I think the best solution depends on your situation. Much of San Francisco has a high 2.4GHz noise floor. So, SFlan has done some experiments with 5.8 atheros mini-pci cards. We got throughputs around 12Mbps from 802.11a, but much less range because of attenuation from higher frequency (~7dB), lower power (~6dB), and greater losses from the tiny cables (~2dB). SFlan has some gear if anyone wants to help test and design the next generation node. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Russell Nelson Sent: Thursday, March 18, 2004 4:47 PM To: [EMAIL PROTECTED] Subject: [BAWUG] BARWN standard radio, but.... I've seen the design for the BARWN standard node, but ... I have two concerns about it. First is that you have two 2.4Ghz radios in the same box[1]. Second is the cost[2]. I'm wondering if it might not be substantially cheaper to use two Linksys WRT54G routers (cheaper) at some distance from each other connected via Ethernet (less interference). On the other hand, the BARWN node uses better radios (Senao) than the Linksys. [1] http://lists.bawug.org/pipermail/wireless/2004-January/014266.html [2] http://www.archive.org/about/faqs.php#182 -- --My blog is at angry-economist.russnelson.com | I'm giving a short Crynwr sells support for free software | PGPok | talk at WTF, Isen's 521 Pleasant Valley Rd. | +1 315 268 1925 voice | stupid net conference: Potsdam, NY 13676-3213 | FWD# 404529 via VOIP | http://stupidnet.com -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
