X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-Injected-Via-Gmane: http://gmane.org/ To: geda-user AT delorie DOT com From: Rupert Swarbrick Subject: Re: [geda-user] datamatrix on PCB Date: Thu, 01 Nov 2012 09:24:17 +0000 Lines: 32 Message-ID: <1nr9m9xnt2.ln2@skate.rswarbrick> References: <20121029195537 DOT 77aff686 AT jive DOT levalinux DOT org> <20121029203832 DOT 54d07a4d AT jive DOT levalinux DOT org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" X-Complaints-To: usenet AT ger DOT gmane DOT org X-Gmane-NNTP-Posting-Host: cpc1-cove3-0-0-cust941.3-1.cable.virginmedia.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2.50 (gnu/linux) Reply-To: geda-user AT delorie DOT com --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Ouabache Designworks writes: > Great, Break up your ground plane and fill it with bits of floating metal. > Your emc compliance engineer is going to have a fit. I can see this could be a problem... Would a "moat" cut out of the copper around the QR code help with this or not? How about if it were supplemented with an extra square track acting as a sort of guard trace / Faraday cage? (I know almost nothing about design at RF frequencies, so this is a genuine, if na=C3=AFve, question!) Rupert --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iJwEAQECAAYFAlCSP8EACgkQRtd/pJbYVobKhwP/VIu7K/THGElLcT/AqZrRmROS 6XddBglPH8hnf8a5oVPikWxbxZneDaijy3GeFRoOmmr7Lacdky/j+7pmik5qhax/ Zx2z9NP234ajwFA9C3M7ZoOyNm9sOytBHexuIPVEnZB6K9XmXz/GaJQx2BEiWRv8 lu5FR3Y4ae1vrQtHCUw= =Xsio -----END PGP SIGNATURE----- --=-=-=--