RE: [SI-LIST] : Complex Planes

Dima Smolyansky (dima@tdasystems.com)
Wed, 23 Sep 1998 19:37:36 -0700

This sounds like a coplanar waveguide, potentially with infinite ground =
planes, and maybe also conductor backed. This essentially means a =
transmission line with the signal trace surrounded by the ground traces =
or planes. There are a number of closed-form equations available in =
literature, and depending on your specific situation you should be able =
to apply them. If the spacing from the signal traces to the ground =
varies, the task may be a little more challenging as impedance will =
vary.

Thanks,

-Dima Smolyansky

-----Original Message-----
From: Eric B. Lewis [SMTP:e-lewis3@ti.com]
Sent: Wednesday, September 23, 1998 10:14 AM
To: si-list@silab.Eng.Sun.COM
Subject: re: [SI-LIST] : Complex Planes

Does anyone know how one would calculate the impedance of a trace on a
reference (GND or VCC) plane?

Eric B. Lewis
VoiceMail:972.575.7798
Pager:972.598.3852
Raytheon TI Systems
6600 Chase Oaks Blvd.
Plano, Texas 75023

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