[SI-LIST] Re: Insertion Loss, Return Loss, ILD, UNi versus Dual stripline

  • From: "Katkoria, Deepak" <Katkoria.Deepak@xxxxxxxxxxx>
  • To: "Haller, Robert" <rhaller@xxxxxxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
  • Date: Thu, 5 Aug 2010 15:58:22 +0200

Yes you would get a loss in both cases..
First option is more preferable...

Otherwise in second option, overlap the differential signal in opposite 
polarity. i.e 2 layer +- 3 later -+

Cheers,
Deepak

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On 
Behalf Of Haller, Robert
Sent: Thursday, August 05, 2010 3:49 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Insertion Loss, Return Loss, ILD, UNi versus Dual stripline

I have 2 Diff pairs in the same dielectric Material (ISO370HR). One is Uni 
Stripline, One is Dual Stripline. Aside from the potentially different 
core/Prepreg material, resin content, glass weave (etc), and they are the Same 
Copper Geometry (say 4 mil line/7 mil space) and have the same impedance, same 
DC resistance  will I be able to observe a difference in Insertion Loss, Return 
Loss, or Insertion Loss Deviation ?
GND ---------------                    GND --------------
Sig        -  -                                     SIG      -  -
GND ----------------                   SIG                -  -
                                                        GND ---------------


Regards
Bob

Robert Haller
Architect Engineer, Switching
Enterasys Networks

Phone: +1 978 684 1340
Fax:     +1 978 684 1499
E-mail:  rhaller@xxxxxxxxxxxxx<mailto:gnigg@xxxxxxxxxxxxx>
Web:     www.enterasys.com<http://www.enterasys.com/>




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