[SI-LIST] Re: RF via
- From: "Alex Horvath" <alexh@xxxxxxxxxxxxxxxx>
- To: <perry.qu@xxxxxxxxxxx>, <DSWANSON@xxxxxxxxxxxxx>
- Date: Mon, 24 Sep 2001 15:22:41 -0700
I found a source that describes an RF via (which is bad terminology, I know)
as follows:
1. Large anti-vias (do they really mean anti-pads).
2. No pads on power and ground planes.
3. No pads on signal planes that are not used.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Perry Qu
Sent: Thursday, September 20, 2001 9:54 AM
To: DSWANSON@xxxxxxxxxxxxx
Cc: 'alexh@xxxxxxxxxxxxxxxx'; Si-List
Subject: [SI-LIST] Re: RF via
Importance: High
Hi!
I would imagine that RF via is similiar to a coax structure, where you have
several return vias surrouding the signal vias. This is to match 50 ohm
impedance as close as possible and reduce the discontinuity effect of the
vias.
Regards
Perry
Dan Swanson wrote:
> Physically short, close to the component.
> Lowest impedance path possible to true ground,
> not the local ground. Via always has some
> finite inductance.
>
> Dan
>
> On Wednesday, September 19, 2001 5:14 PM, Alex Horvath
> [SMTP:alexh@xxxxxxxxxxxxxxxx] wrote:
> >
> > What are the particulars of a "rf via"?
> >
> > I'm using a component which switches at 2 Ghz that recommends the use of
> > this type of via.
> >
> >
> > ------------------------------------------------------------------
> > To unsubscribe from si-list:
> > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
> >
> > or to administer your membership from a web page, go to:
> > //www.freelists.org/webpage/si-list
> >
> > For help:
> > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
> >
> > List archives are viewable at:
> > //www.freelists.org/archives/si-list
> > or at our remote archives:
> > http://groups.yahoo.com/group/si-list/messages
> > Old (prior to June 6, 2001) list archives are viewable at:
> > http://www.qsl.net/wb6tpu
> >
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
--
Perry Qu
Product Integrity | 600 March Road
Alcatel Canada | Ottawa, ON K2K 2E6, Canada
DID: (613) 7846720 | FAX: (613) 5993642
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
