From owner-freebsd-mobile Sun Aug 18 12:20:41 2002 Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1E86437B400 for ; Sun, 18 Aug 2002 12:20:38 -0700 (PDT) Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3F62643E65 for ; Sun, 18 Aug 2002 12:20:37 -0700 (PDT) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.12.3/8.12.2) with ESMTP id g7IJGwRo083819; Sun, 18 Aug 2002 21:17:09 +0200 (CEST) (envelope-from phk@critter.freebsd.dk) To: "M. Warner Losh" Cc: fscked@pacbell.net, mobile@FreeBSD.ORG Subject: Re: 802.11b antennas In-Reply-To: Your message of "Sun, 18 Aug 2002 13:14:51 MDT." <20020818.131451.51626124.imp@bsdimp.com> Date: Sun, 18 Aug 2002 21:16:58 +0200 Message-ID: <83818.1029698218@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org In message <20020818.131451.51626124.imp@bsdimp.com>, "M. Warner Losh" writes: >All I know is that wrapping my lucent card in tinfoil didn't keep it >from interferring with other 802.11b equiptment in the house. Didn't >do any calculations, but it seemed to attenuate things by only 2dB or >so, but that could easily be in the noise. You metal about three times the thickness of regular kitchen-tinfoil and you need to get it connected to the metal case of the card. If you just wrap the tinfoil around the plastic part, it will just act like a capacitor in series with the antenna and likely as not not make any difference at all. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message