RE: [SI-LIST] : RF boards

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From: Ron Miller (rmiller@Brocade.COM)
Date: Fri Apr 28 2000 - 12:47:16 PDT


Above 1 Ghz dielectric loss dominates. The dielectric loss
tangent for the nelco is much better than the Getek. Since
the signal edges contain components several times the
data rate, high frequency losses will start closing the eye.

Ron

> -----Original Message-----
> From: Sean Murray
> Sent: Friday, April 28, 2000 10:31 AM
> To: si-list@silab.eng.sun.com
> Subject: RE: [SI-LIST] : RF boards
> Importance: High
>
> Ron,
> I do not see much of a difference between the nelco 4000 and
> Getek. Is there some variable that I'm missing that plays a big part in
> the performance at the RF levels other than the DK?
>
>
>
> > -----Original Message-----
> > From: Ron Miller [mailto:rmiller@Brocade.COM]
> > Sent: Friday, April 28, 2000 10:02 AM
> > To: 'si-list@silab.eng.sun.com'
> > Subject: RE: [SI-LIST] : RF boards
> >
> >
> > Hi Sean
> >
> > I have done some work substituting Arlon 350(teflon with
> > ceramic loading)
> > for FR4 and have
> > been able to double the bandwidth of previous generations.
> > Going from FR4
> > to Getek will
> > not get you much, but if you go to Nelco 4000-13SI, you can
> > expect a big
> > improvement in
> > the frequency dependent losses.
> >
> > Good luck
> > Ron Miller
> >
> >
> > > -----Original Message-----
> > > From: Sean Murray
> > > Sent: Friday, April 28, 2000 7:58 AM
> > > To: 'si-list@silab.eng.sun.com'
> > > Subject: [SI-LIST] : RF boards
> > > Importance: High
> > >
> > > Anyone have any feelings on what subtle differences when
> > fabricating a
> > > board can do to an RF board. Such as going from FR-4 to
> > Getek; 50/200
> > > gold/nickle vs. 30/100 gold/nickle. Is there any books out
> > there that
> > > deal with strictly the layout of RF boards??
> > >
> > > Regards,
> > > Sean Murray
> > > Sales Manager
> > >
> > > M&M Specialties Inc.
> > > 1236 W. Southern Ave. #106
> > > Tempe, AZ. 85282-4518
> > > Phone: (480) 858-0393 x105
> > > Cell: (602) 684-7859
> > > Fax: (480) 858-1882
> > > Email: seandm@mmspec.com
> > > WWW.mmspec.com
> > >
> > >
> > >
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