[SI-LIST] Re: Coax vs. Microstrip
- From: "Swanson, Dan" <Dan_Swanson@xxxxxxxxxxxx>
- To: "'cacofonix98@xxxxxxxxx'" <cacofonix98@xxxxxxxxx>,si-list@xxxxxxxxxxxxx
- Date: Wed, 26 Mar 2003 08:04:04 -0500
Siva,
Depending on the frequency range,
I don't think the 50 ohm microstrip
launch is realistic. If you are using
a 3D tool, why not model the SMA
as 50 ohm coax leading to the launch point.
If you a using a planar tool, you might
get a better approximation using vias
from the bottom of the box to approximate
the coax launch into the board. Might
have to flip the board over and put the
top surface near the bottom of the simulation
box.
Dan
Dan Swanson EMAIL: d.swanson@xxxxxxxx
Forem USA PHONE: 978-834-4085
37 South Hunt Road FAX: 978-388-7077
Amesbury, MA 01913
> -----Original Message-----
> From: SS [mailto:cacofonix98@xxxxxxxxx]
> Sent: Tuesday, March 25, 2003 4:27 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Coax vs. Microstrip
>
>
>
> Hello,
>
> I am trying to model the SMA to PCB launch interface
> in a "popular tool".
> I am making a couple of simplifications
> 1) modeling only the part of the SMA that is embedded
> in the PCB.
> 2) Launch into the center conductor through a 50 ohm
> microstrip structure.
>
> Are these simplifications realistic or valid? If not,
> how far off from reality is it compared to a coaxial
> launch?
>
> Thanks
> Siva
>
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
> http://platinum.yahoo.com
> ------------------------------------------------------------------
> 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:
