[SI-LIST] Re: differential line
- From: "Istvan NOVAK" <istvan.novak@xxxxxxxxxxxxxxxx>
- To: <zhang_kun@xxxxxxxxxx>, "si-list" <si-list@xxxxxxxxxxxxx>
- Date: Mon, 29 Dec 2003 10:37:47 -0500
Zhangkun,
If the perforation holes are not much bigger than the trace width,
and you have a uniform pattern of small holes, no large cut or
split, the implications are: impedance goes up, crosstalk goes up.
It is true that the increase of crosstalk is usually more
pronounced than the mismatch. There were several papers
in the past showing the increased EMI radiation from slots,
and some also offered condensed equivalent circuits. Let me
know if you need a short list of papers.
Regards,
Istvan Novak
SUN Microsystems
----- Original Message -----
From: "Zhangkun" <zhang_kun@xxxxxxxxxx>
To: "si-list" <si-list@xxxxxxxxxxxxx>
Sent: Monday, December 29, 2003 7:47 AM
Subject: [SI-LIST] differential line
> Dear All:
> Have anybody studied differential line or single line across perforated
reference plane? I use Ansoft to analyze this problem. I find, when there is
a slot in the reference plane but and the reference plane is not cut, the
S21 is not affectted seriously comparing with the S21 when the reference
plane is integral.
>
> Could you give me some advice?
>
> Best Regards
>
> Zhangkun
> 2003.12.29
>
>
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