skrf.media.freespace.Freespace.line

Freespace.line(d, unit='deg', z0=None, embed=False, **kwargs)

Transmission line of a given length and impedance.

The units of length are interpreted according to the value of unit. If z0 is not None, then a line specified impedance is produced. if embed is also True, then the line is embedded in this media’s z0 environment, creating a mismatched line.

Parameters:

  • d (number) – the length of transmission line (see unit argument)

  • unit (['deg','rad','m','cm','um','in','mil','s','us','ns','ps']) – the units of d. See to_meters(), for details

  • z0 (number, string, or array-like or None) – the characteristic impedance of the line, if different from self.z0. To set z0 in terms of normalized impedance, pass a string, like z0=’1+.2j’

  • embed (bool) – deprecated parameter that only emmit a warning if set to true.

  • **kwargs (key word arguments) – passed to match(), which is called initially to create a ‘blank’ network.

Returns:

line – matched transmission line of given length

Return type:

Network object

Examples

>>> my_media.line(1, 'mm', z0=100)
>>> my_media.line(90, 'deg', z0='2') # set z0 as normalized impedance