[SI-LIST] Re: Capacitance of Transmission Line
- From: "icer world" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "icermail@xxxxxxxxx" for DMARC)
- To: "Charles.Grasso@xxxxxxxxxxxx" <Charles.Grasso@xxxxxxxxxxxx>, "dmarc-noreply@xxxxxxxxxxxxx" <dmarc-noreply@xxxxxxxxxxxxx>, Si-list <si-list@xxxxxxxxxxxxx>
- Date: Thu, 8 Jan 2015 06:55:40 +0000 (UTC)
Hi Charles,
Thanks for your reply.
I used Q3D to do the extraction and the difference is 1pF. @100MHz, the
capacitance is about 11.5pF, while 10pF @1GHz. Altough the difference is small,
I still want to know why has this change.
On Thursday, January 8, 2015 5:28 AM, "Grasso, Charles"
<Charles.Grasso@xxxxxxxxxxxx> wrote:
Hi - two questions:
1. What is the delta between the differences?
And
2. What is the tool are you using for the extraction?
I suspect you are seeing "rounding" errors from the simulation engine.
Best Regards
Charles Grasso
Compliance Engineer
Echostar Communications
(w) 303-706-5467
(c) 303-204-2974
(t) 3032042974@xxxxxxxxx
(e) charles.grasso@xxxxxxxxxxxx
(e2) chasgrasso@xxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of icer world
Sent: Wednesday, January 07, 2015 12:04 AM
To: Si-list
Subject: [SI-LIST] Capacitance of Transmission Line
Hi Experts,
Happy new year!
When I extract the RLCG of ideal transmission line, I observe that the
capacitance varies in different frequency, although it's small. In my opinion,
the capacitance should keep same when the frequency changes, because I set the
relative dielectric constants same in all the frequency.
Could anybody help explain it ?
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