From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from imap.thunk.org (imap.thunk.org [IPv6:2600:3c02::f03c:91ff:fe96:be03]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "imap.thunk.org", Issuer "CAcert Class 3 Root" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id C600521F1FC for ; Thu, 19 Dec 2013 16:51:02 -0800 (PST) Received: from root (helo=closure.thunk.org) by imap.thunk.org with local-esmtp (Exim 4.80) (envelope-from ) id 1VtoIt-0003F0-Dh; Fri, 20 Dec 2013 00:50:59 +0000 Received: by closure.thunk.org (Postfix, from userid 15806) id 68D4E580A56; Thu, 19 Dec 2013 19:50:58 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=thunk.org; s=mail; t=1387500658; bh=Z/vf7MD7GbJdoQdiL/R7mzwk4YKXmm7ZRZV8G3nC6hQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FIsi2wjVc78EcgeoOpcCOIEQyd1925DKx/zYdUIDOn04iIFw70A3E75lJIDAWMowT PuRO1FfOzIXb+di7YV7IfTunTPU33418mcbbhchjQapQW8BazfcWxZN8NHkXobqpob zB2Hk1tbFUhzQ0AYHPdDfTs91M75jmLsQ2zwZAtU= Date: Thu, 19 Dec 2013 19:50:58 -0500 From: Theodore Ts'o To: dpreed@reed.com Message-ID: <20131220005058.GE9130@thunk.org> References: <52AF797E.6030600@imap.cc> <18972.1387302855@sandelman.ca> <1387319157.48330794@apps.rackspace.com> <20131217154345.0e91b65f@nehalam.linuxnetplumber.net> <1387379970.401720581@apps.rackspace.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1387379970.401720581@apps.rackspace.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Cc: "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] treating 2.4ghz as -legacy? X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Dec 2013 00:51:04 -0000 Thanks for the detailed explanation about antenna issues. One question, if I might: > (and don't put your AP in the attic and expect a good signal near > the ground.... or in the basement. Physics will make sure that the > signal is zero at any ground, so being closer to the ground than the > antenna weakens the signal a lot!) I thought the opposite was true? That is, ground loses go up when the antenna is closer to the ground, so it was good to have bigger, taller atenna towers? If what you say is correct, how do antennas on cell towers mitigate this particular issue? - Ted