Currently the standard library includes one component in the simple_transmission_lines tool box. A tool box is just a directory with the description of models in it.
Remember the arguments are case sensitive.
lossless_transmission_line
A lossless transmission line which is described by three arguments.
z0: the line impedance (in ohms)
theta: the electrical length (in degrees)
f0: the center frequency (in Hertz)
Copyright 2010, Gregory Kiesel