# y2s

Convert Y-parameters to S-parameters

## Syntax

``s_params = y2s(y_params,z0)``

## Description

example

````s_params = y2s(y_params,z0)` converts Y-parameters to S-parameters.```

## Examples

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Define a matrix of Y-parameters.

```Y11 = 0.0488133074245012 - 0.390764155450191i; Y12 = -0.0488588365420561 + 0.390719345880018i; Y21 = -0.0487261119282660 + 0.390851884427087i; Y22 = 0.0487710062903760 - 0.390800401433241i; y_params = [Y11,Y12; Y21,Y22];```

Convert Y-parameters to S-parameters.

`s_params = y2s(y_params)`
```s_params = 2×2 complex 0.0038 + 0.0248i 0.9961 - 0.0250i 0.9964 - 0.0254i 0.0037 + 0.0249i ```

## Input Arguments

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N-port Y-Parameters, specified as an N-by-N-by-M array, where M represents the number of frequency points of N-port Y-parameters.

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

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N-port- S-parameters, returned as a complex N-by-N M array, where M represents the number of frequency points of N-port S-parameters.

## Version History

Introduced before R2006a

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