One new approach is to model surface roughness as frequency-dependent "effective conductivity". You can use X2D (www.ataitec.com) to compute this effective conductivity, for example, and enter them into HFSS. Charles On Thu, Jul 10, 2014 at 6:39 PM, luyi <issue.lu@xxxxxxxxxxx> wrote: > ^®Ãÿà !j÷¬¢gžÃâ«â°Ã©Ãz)âwnrÃ+²êÃië¢è! > ë,¡ýÃÅ¡â¡^â)à þ+-â¦Ã¨n¬¦¡Ã¥¶ > ¨ž\Åâ ËÅzšè¾'^v)Þì > ------------------------------------------------------------------ > 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