In the book _Microwave_Engineering_ by David Pozar, he gives the
formula for RLGC of two round conductors with a radius, 'a' with a
center to center distance, 'D' as:
L = (mu/pi)cosh^-1(D/2a)
C = (pi*eps')/(cosh^-1(D/2a)
R = Rs/pi*a
G = (pi*w*eps'')/cosh^-1(D/2a)
Rs is the resistivity
w is omega (frequency)
mu is permeability of free space * relative permeability
eps' is permittivity of free space * relative permittivity
eps'' is a factor in calculating the loss tangent
I hope this helps some.
Regards,
-- Weston Beal Signal Integrity Engineer beal@twisto.compaq.com beal@bangate.compaq.com "A little bit of knowledge is a dangerous thing"======================================================================
Dear SI engineers,
anyone out there having data/formulas or a handy tool for the transmission line parameters (RLCG) and loss effects of twisted cables (over ground) ?
Thanks for any pointer,
Bardo Mueller ------------------------------------------------------------------- Dr. Bardo MUELLER Temic TELEFUNKEN microelectronic GmbH Bardo.Mueller@ulm.temic.de Design Center Integrated Circuits Tel. +49 (0)731 505 1212 Wilhelm-Runge-Str. 11 Fax +49 (0)731 505 1314 D-89081 ULM Germany