[SI-LIST] Re： Re: What can we get from solid ground plane?

Charles:
 
Thanks for head up. It did take me quite a few days to understand this after 
doing a lot of experiments.
 
thanks,
Han
"Grasso, Charles" <Charles.Grasso@xxxxxxxxxxxx> £º
Bi Han - Can it be that you are using a well known 2D modeling tool?
If so then be careful with how you interpret the term "Ideal Ground".
For the 2D modeling tool this means "Return Path".=20

Best Regards
Charles Grasso
Senior Compliance Engineer
Echostar Communications Corp.
Tel: 303-706-5467
Fax: 303-799-6222
Cell: 303-204-2974
Pager/Short Message: 3032042974@xxxxxxxx
Email: charles.grasso@xxxxxxxxxxxx;
Email Alternate: chasgrasso@xxxxxxxx

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On Behalf Of Bi Han
Sent: Saturday, September 24, 2005 12:19 AM
To: List` Si
Subject: [SI-LIST] What can we get from solid ground plane?

In papers, I often read "solid ground plane" concept. Some papers will =
treat it as reference node.=20
=20
As I know, ground plane could not be treated as "ideal ground" no matter =
how good/wide/thick it is. The assumption behind it could be different =
as I will present my understanding below.
=20
From the view of EM modeling, this solid ground plane make "ground =
reduction method" effictive and accurate. "ground reduction" means fold =
ground plane RLCG into signal trace, thus ground plane could be treated =
as ideal ground.=20
=20
From design view, the benefit I could see for now, is that solid ground =
plane make each loop's mutual inductance minimal, thus minimize cross =
talk.
=20
Any different ideas?
=20
thanks,
Han
=09
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=A7=C8=C5 =20

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