# [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??

*From*: Mike Jenkins <jenkins@xxxxxxxx>*To*: si-list@xxxxxxxxxxxxx*Date*: Mon, 10 Sep 2001 12:11:21 -0700

Dear "fname", It depends entirely on how you number the conductors. If, for a given matrix, one renumbers the conductors, swapping the ith and jth conductors, for example, then that's equivalent to swapping the ith and jth rows and columns in the describing matrices. So, the answer is "no", they're not necessarily in descending order. Regards, Mike fname lname wrote: > > Hi Folks, > I have a question. Should the coupling coefficients in the maxwell > capacitence matrix always be in the descending order going down along a > column or can the coupling between the 2nd and 3rd element be greater than > between the 1st and 2nd element. > Any help is greatly appreciated. > > Thanks, > Signal Guy. > -- > >I've just extracted the RLGC matrices for 5 coupled > >striplines using Apsimtech RLGC. > > > >As expected, the diagonal elements of the capacitive matrix are > >positive capacitance values. All the off-diagonal elements are > >negative EXCEPT one. Is this correct. It has been a while since I've > >thought about this, but I was under the impression the capacitive > >off diag element were all negative. Anyone know for sure ?? > > > >The element in column 1 row 5 is the one I question: > > > > > > 3.1600e-15 > > -4.9360e-16 3.2540e-15 > > -2.0080e-17 -4.8990e-16 3.2540e-15 > > -1.3380e-18 -1.9820e-17 -4.8990e-16 3.2540e-15 > > 3.1280e-20 -1.3380e-18 -2.0080e-17 -4.9360e-16 3.1600e-15 > > > > > > > > > >-Ray > > > >------------------------------------------------------------------ > >To unsubscribe from si-list: > >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >For help: > >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > >List archives are viewable at: > > http://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 > > > > > > > > Get 250 color business cards for FREE! > http://businesscards.lycos.com/vp/fastpath/ > ------------------------------------------------------------------ > 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: > http://www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > List archives are viewable at: > http://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 > -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mike Jenkins Phone: 408.433.7901 _____ LSI Logic Corp, ms/G715 Fax: 408.433.7495 LSI|LOGIC| (R) 1525 McCarthy Blvd. mailto:Jenkins@xxxxxxxx | | Milpitas, CA 95035 http://www.lsilogic.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: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: http://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

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- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??
- » [SI-LIST] Re: non-negative off diagonal capacitive matrix elements ??