[SI-LIST] Re: AW: about the hfss simulation result
- From: Zheng Edison <edisonzheng@xxxxxxxx>
- To: <cristian.gozzi@xxxxxxxxx>
- Date: Tue, 17 Feb 2015 17:52:30 +0800
Cristian:
I changed the sweep type from interpolating to discrete,and found the ripple in
IL was caused by error of interpolating.Thank you and all the other guys.I have
set the error tolerance of interpolating from 0.5% to 0.01% and submited to the
server,before my 7days'holiday.I think this time the result will be normal.
BR
Edison
--- Original Message ---
From: "Cristian Gozzi" <cristian.gozzi@xxxxxxxxx>
Sent: February 16, 2015 2:22 PM
To: edisonzheng@xxxxxxxx
Cc: asparky@xxxxxxxxxxxxxxxxxxxxxxxx, "Havermann, Gert"
<Gert.Havermann@xxxxxxxxxxx>, "<si-list@xxxxxxxxxxxxx>" <si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] Re: AW: about the hfss simulation result
Hi guys
it doesn't matter the frequency sweep range...
the right question is: which is the frequency used for the mesh convergence
criteria?
Usually in HFSS there are 2 different options:
- Fconv=Fknee=0.5/Trise and then you can sweep up to 5xFknee
- Fconv=Fmax where Fmax is the maximum frequency of your sweep
then, regarding Interp. sweep there are some more tricks in the advanced
options.
BTW, if you have some doubts about interp. sweep you can use discrete sweep
with few points in the interested bandwidth and check IL and RL
Regards
Cristian
2015-02-15 17:28 GMT-08:00 Zheng Edison <edisonzheng@xxxxxxxx>:
> Aubrey,
> The ripple is in the insertion loss,and the return loss is normal.
> I set the max delta S at 0.0075.
> the ripple at 4GHz is about 0.1db(the total fanout length is only about
> 200mil,material:M4 ).
> Yes,I was doing an interpolating sweep,the start frequency was 25MHz and
> the step is 25MHz too.
> BR
> Edison
>
>
> --- Original Message ---
>
> From: "Aubrey Sparkman" <asparky@xxxxxxxxxxxxxxxxxxxxxxxx>
> Sent: February 15, 2015 11:07 PM
> To: edisonzheng@xxxxxxxx
> Cc: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>, "<
> si-list@xxxxxxxxxxxxx>" <si-list@xxxxxxxxxxxxx>
> Subject: [SI-LIST] Re: AW: about the hfss simulation result
>
> Edison,
>
> You said your ripple was in the insertion loss, not the return loss
> correct?
>
> What is your convergence criteria?
>
> How far down does the ripple go at 4 GHz for the 20GHz sweep? Are you
> doing an interpolated sweep? How many data points are you outputting?
>
> Aubrey
>
>
> Sent from my iPhone
>
> > On Feb 15, 2015, at 4:05 AM, Zheng Edison <edisonzheng@xxxxxxxx> wrote:
> >
> > Gert:
> > I have checked the convergence data,there are three runs below the
> convergence criterium,So,it is not caused by convergence.
> > My question:how to cover the correct frequency range?In my case,the
> ripples are significant at 4GHz when the frequency range is 25MHz to
> 20GHz,and disappear when the sweeping range is changed to 25MHz to 30GHz.
> >
> > Edison
> >
> > --- Original Message ---
> >
> > From: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
> > Sent: February 12, 2015 9:28 PM
> > To: edisonzheng@xxxxxxxx, si-list@xxxxxxxxxxxxx
> > Subject: AW: [SI-LIST] about the hfss simulation result
> >
> > Ripples in RL are reflections and some reflections are frequency
> dependant. If you do not cover the correct frequency range, the results
> might be wrong.
> > In addition, check your convergence data. you should specify that at
> least two runs are below the convergence criterium because sometimes the
> convergence is in a resonant behavior, thus the convergence isn't really
> meet although the criteium was meet once.
> >
> > BR
> > Gert
> >
> >
> > ----------------------------------------
> > Absender ist HARTING Electronics GmbH, Marienwerderstraße 3, D-32339
> Espelkamp; Registergericht: Amtsgericht Bad Oeynhausen; Register-Nr.: HRB
> 8808; Vertretungsberechtigte Geschäftsführer: Dipl.-Kfm. Edgar-Peter
> Düning, Dipl.-Ing. Torsten Ratzmann, Dipl.-Wirtschaftsing. Ralf Martin Klein
> >
> > -----Ursprüngliche Nachricht-----
> > Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> Im Auftrag von Zheng Edison
> > Gesendet: Donnerstag, 12. Februar 2015 14:03
> > An: si-list@xxxxxxxxxxxxx
> > Betreff: [SI-LIST] about the hfss simulation result
> >
> > Hi,experts
> > I am doing a simulation to optimize the impedance of cap pairs.I found
> the insertion loss curve of the cap pair had unnormal ripples,then I
> changed the frequency sweep range,the ripples disappeared!I am sure all the
> setup parameters are correct. I am confused that wheather my optimization
> is ok.can anyone give me some suggestions?
> >
> > Edison------------------------------------------------------------------
> > 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 forum is accessible at:
> > http://tech.groups.yahoo.com/group/si-list
> >
> > List archives are viewable at:
> > //www.freelists.org/archives/si-list
> >
> > 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 forum is accessible at:
> > http://tech.groups.yahoo.com/group/si-list
> >
> > List archives are viewable at:
> > //www.freelists.org/archives/si-list
> >
> > 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 forum is accessible at:
> http://tech.groups.yahoo.com/group/si-list
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> 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 forum is accessible at:
> http://tech.groups.yahoo.com/group/si-list
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> 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 forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
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 forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
