s2abcd
Convert S-parameters to ABCD-parameters
Description
converts
the scattering parameters to the ABCD-parameters. abcd_params
= s2abcd(s_params
,z0
)
Examples
Convert S-Parameters to ABCD-Parameters
Define a matrix of S-parameters.
s_11 = 0.61*exp(j*165/180*pi); s_21 = 3.72*exp(j*59/180*pi); s_12 = 0.05*exp(j*42/180*pi); s_22 = 0.45*exp(j*(-48/180)*pi); s_params = [s_11 s_12; s_21 s_22]; z0 = 50;
Convert S-parameters to ABCD-parameters.
abcd_params = s2abcd(s_params,z0)
abcd_params = 2×2 complex
0.0633 + 0.0069i 1.4958 - 3.9839i
0.0022 - 0.0024i 0.0732 - 0.2664i
Input Arguments
s_params
— 2N-port S-Parameters
2N-by-2N-by-M array of
complex numbers
2N-port S-parameters, specified as a 2N-by-2N-by-M array of complex numbers, where M represents the number of frequency points of 2N-port S-Parameters.
z0
— Reference impedance
50
(default) | positive real scalar | positive real vector
Reference impedance in ohms, specified as one of the following:
Positive real scalar when you want to specify the same the reference impedance for all ports in the network.
Positive real vector of length N when you want to specify a different reference impedance for each port in the N-port network. (since R2023a)
Positive real vector of length K when you want to specify a different reference impedance for each in the K frequencies in the data. (since R2023a)
If the reference impedance is a vector and the number of ports N
equals the number of data frequencies K, N ==
K, then the sparameters
object will assign each
element of the vector to each port of the network. To specify reference impedances for
each frequency in this case, specify Z0
as a 3-D vector of length
1-by-1-by-K.
Output Arguments
abcd_params
— 2N-port ABCD parameters
2N-by-2N-by-M array of
complex numbers
2N-port ABCD parameters, returned as a complex 2N-by-2N-by-M array, where M represents the number of frequency points of 2N-port ABCD-parameters. The output ABCD-parameters matrices have distinct A, B, C, and D submatrices:
References
[1] Pozar, David M. Microwave Engineering. 3rd ed, J. Wiley, 2005.
Version History
Introduced before R2006aR2023a: Specify multiple reference impedance values
Specify a different reference impedance for each port in the network by setting the
z0
argument to a vector.
See Also
MATLAB Command
You clicked a link that corresponds to this MATLAB command:
Run the command by entering it in the MATLAB Command Window. Web browsers do not support MATLAB commands.
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
How to Get Best Site Performance
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)