From: Ron Miller ([email protected])
Date: Fri Apr 28 2000 - 13:12:21 PDT
The dielectric loss tangent dominates high frequency losses
at frequencys above 1 Ghz. Since most digital signals these
days have edge rates which generate components much higher
than 1 Ghz, the edges are distorted if you have lossy material.
Roln MIller
> -----Original Message-----
> From: Sean Murray
> Sent: Friday, April 28, 2000 10:31 AM
> To: [email protected]
> 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:[email protected]]
> > Sent: Friday, April 28, 2000 10:02 AM
> > To: '[email protected]'
> > 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: '[email protected]'
> > > 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: [email protected]
> > > WWW.mmspec.com
> > >
> > >
> > >
> > > **** To unsubscribe from si-list or si-list-digest: send e-mail to
> > > [email protected]. In the BODY of message put: UNSUBSCRIBE
> > > si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> > > si-list archives are accessible at http://www.qsl.net/wb6tpu
> > > ****
> > >
> >
> > **** To unsubscribe from si-list or si-list-digest: send e-mail to
> > [email protected]. In the BODY of message put: UNSUBSCRIBE
> > si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> > si-list archives are accessible at http://www.qsl.net/wb6tpu
> > ****
> >
>
> **** To unsubscribe from si-list or si-list-digest: send e-mail to
> [email protected]. In the BODY of message put: UNSUBSCRIBE
> si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> si-list archives are accessible at http://www.qsl.net/wb6tpu
> ****
>
**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected]. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****
This archive was generated by hypermail 2b29 : Wed Nov 22 2000 - 10:50:09 PST