Programming instructions

Misc. Components
Multisim Component Reference Guide 13-14 ni.com
13.9.1 Model
A lossless transmission line is an LC model.
The values of L and C are given by:
where:
ct = capacitance per unit length
lt = inductance per unit length
td = propagation time delay
Z = nominal impedance
The propagation time-delay may be calculated from the data-books as follows:
where:
length = length of the line
Vp = velocity of propagation
Vf = velocity-factor
c = speed of light
13.9.2 Lossless Transmission Line Model Parameters
and Defaults
ct
td
Z
-----=
lt td
∗
Z=
td
length
Vp
Vp Vf c
=






=∗
Symbol Parameter Name Default Unit
Z0 Nominal impedance 100 Ω
Td Propagation time delay 1e-09 s
ComponentRef.book Page 14 Thursday, December 7, 2006 10:12 AM