Mail Archives: geda-user/2012/11/01/12:39:53
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On Oct 29, 2012, at 3:42 PM, Ouabache Designworks wrote:
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> 2012/10/29 Levente Kovacs <leventelist AT gmail DOT com>
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> Here is the image:
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> http://logonex.eu/levente/haz/webcam_29102012.png
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> --
> Levente Kovacs
> CTO, CSO
> http://levente.logonex.eu
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> 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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<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><br><div><div>On Oct 29, 2012, at 3:42 PM, Ouabache Designworks =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><br><br><div class=3D"gmail_quote">2012/10/29 Levente =
Kovacs <span dir=3D"ltr"><<a href=3D"mailto:leventelist AT gmail DOT com" =
target=3D"_blank">leventelist AT gmail DOT com</a>></span><br><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex">
<br>
<br>
Here is the image:<br>
<br>
<a href=3D"http://logonex.eu/levente/haz/webcam_29102012.png" =
target=3D"_blank">http://logonex.eu/levente/haz/webcam_29102012.png</a><br=
>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
<br>
--<br>
Levente Kovacs<br>
CTO, CSO<br>
<a href=3D"http://levente.logonex.eu/" =
target=3D"_blank">http://levente.logonex.eu</a><br></div></div></blockquot=
e><div><br><br>Great, Break up your ground plane and fill it with bits =
of floating metal. Your emc compliance engineer is going to have a =
fit.<br></div></div></blockquote><br></div><div>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.</div><br><div>
<span class=3D"Apple-style-span" style=3D"border-collapse: separate; =
border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; text-align: auto; =
-khtml-text-decorations-in-effect: none; text-indent: 0px; =
-apple-text-size-adjust: auto; text-transform: none; orphans: 2; =
white-space: normal; widows: 2; word-spacing: 0px; "><span =
class=3D"Apple-style-span" style=3D"border-collapse: separate; =
border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; text-align: auto; =
-khtml-text-decorations-in-effect: none; text-indent: 0px; =
-apple-text-size-adjust: auto; text-transform: none; orphans: 2; =
white-space: normal; widows: 2; word-spacing: 0px; "><p style=3D"margin: =
0.0px 0.0px 0.0px 0.0px"><font face=3D"Helvetica" size=3D"3" =
style=3D"font: 12.0px Helvetica">John Doty<span =
class=3D"Apple-converted-space"> <span =
class=3D"Apple-converted-space"> </span><span =
class=3D"Apple-converted-tab"> <span =
class=3D"Apple-converted-space"> </span></span></span>Noqsi =
Aerospace, Ltd.</font></p><p style=3D"margin: 0.0px 0.0px 0.0px =
0.0px"><a href=3D"http://www.noqsi.com/">http://www.noqsi.com/</a></p><p =
style=3D"margin: 0.0px 0.0px 0.0px 0.0px"><font face=3D"Helvetica" =
size=3D"3" style=3D"font: 12.0px Helvetica"><a =
href=3D"mailto:jpd AT noqsi DOT com">jpd AT noqsi DOT com</a></font></p><br =
class=3D"Apple-interchange-newline"></span></span>
</div>
<br></body></html>=
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