skrf.network.Network.s_active
- Network.s_active(a)[source]
Returns the active s-parameters of the network for a defined wave excitation a.
The active s-parameter at a port is the reflection coefficients when other ports are excited. It is an important quantity for active phased array antennas.
Active s-parameters are defined by [1]:
\[\mathrm{active(s)}_{m} = \sum_{i=1}^N s_{mi}\frac{a_i}{a_m}\]where \(s\) are the scattering parameters and \(N\) the number of ports
- Parameters:
a (complex array of shape (n_ports)) – forward wave complex amplitude (pseudowave formulation [2])
- Returns:
s_act – active S-parameters for the excitation a
- Return type:
complex array of shape (n_freqs, n_ports)
See also
z_active
active Z-parameters
y_active
active Y-parameters
vswr_active
active VSWR
References