X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com From: John Doty Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-2--181371790 Subject: Re: [geda-user] datamatrix on PCB Date: Thu, 1 Nov 2012 10:39:42 -0600 In-Reply-To: To: geda-user AT delorie DOT com References: <20121029195537 DOT 77aff686 AT jive DOT levalinux DOT org> <20121029203832 DOT 54d07a4d AT jive DOT levalinux DOT org> Message-Id: X-Mailer: Apple Mail (2.1085) Note-from-DJ: This may be spam Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk --Apple-Mail-2--181371790 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On Oct 29, 2012, at 3:42 PM, Ouabache Designworks wrote: >=20 >=20 > 2012/10/29 Levente Kovacs >=20 >=20 > Here is the image: >=20 > http://logonex.eu/levente/haz/webcam_29102012.png >=20 >=20 > -- > Levente Kovacs > CTO, CSO > http://levente.logonex.eu >=20 >=20 > Great, Break up your ground plane and fill it with bits of floating = metal. Your emc compliance engineer is going to have a fit. Looks like it's only a few mm across. So electrically it's a high pass = filter with cutoff ~10 GHz. As long as there are no traces behind it, = you won't excite it much. Closing the loop around it (have copper along = the board edge) would help a bit by pushing the resonance ~2x higher. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ jpd AT noqsi DOT com --Apple-Mail-2--181371790 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii


2012/10/29 Levente = Kovacs <leventelist AT gmail DOT com>


Here is the image:

http://logonex.eu/levente/haz/webcam_29102012.png


--
Levente Kovacs
CTO, CSO
http://levente.logonex.eu


Great, Break up your ground plane and fill it with bits = of floating metal. Your emc compliance engineer is going to have a = fit.

Looks like it's only a = few mm across. So electrically it's a high pass filter with cutoff ~10 = GHz. As long as there are no traces behind it, you won't excite it much. = Closing the loop around it (have copper along the board edge) would help = a bit by pushing the resonance ~2x higher.

John Doty              Noqsi = Aerospace, Ltd.

http://www.noqsi.com/

jpd AT noqsi DOT com

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