[SI-LIST] Re: Via modeling shows strange behavior
- From: shengli lin <shengli.lin.sl@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 1 Mar 2012 17:12:45 -0800
if this guy's email is not hacked, si-list should block him for the
spam he sent.
Shengli Lin
On Thu, Mar 1, 2012 at 5:06 PM, Ajay G <ajay.pisi@xxxxxxxxx> wrote:
> why? i did not get....
> On Wed, Feb 29, 2012 at 10:49 PM, <Ravinder.Ajmani@xxxxxxxxxxxxxx> wrote:
>
>> Hi Experts,
>> I am doing via modeling using Cadence PCB SI GXL. I have a 6-layer
>> stackup, and via is connecting the interconnect from Top layer to Layer 3,
>> with Layer 2 as Ground. I modeled the via with a single Ground via placed
>> at the closest distance the tool will allow, and then modeled the same via
>> without the Ground via. The Insertion Loss and the Return Loss for the
>> Single via are about 15 - 20% better then the Ground coupled via. I am
>> puzzled with the results. I will appreciate if you can help me understand
>> the reason for this.
>>
>> Thanks.
>>
>> Regards,
>> Ravinder Ajmani
>> Server PCB Development
>> Hitachi Global Storage Technologies
>>
>>
>> Email: Ravinder.Ajmani@xxxxxxxxxxxxxx
>>
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>
>
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