AnalyzedResult property

Class: rfckt.series
Package: rfckt

Computed S-parameters, noise figure, OIP3, and group delay values

Values

rfdata.data object

Description

Handle to an rfdata.data object that contains the S-parameters, noise figure, OIP3, and group delay values computed over the specified frequency range using the analyze method. This property is empty by default.

The analyze method computes the S-parameters of the AnalyzedResult property using the data stored in the Ckts property as follows:

  1. The analyze method first calculates the impedance matrix of the series connected network. It starts by converting each component network's parameters to an impedance matrix. The following figure shows a series connected network consisting of two 2-port networks, each represented by its impedance matrix,

    where

    [Z]=[Z11Z12Z21Z22][Z]=[Z11Z12Z21Z22]

  2. The analyze method then calculates the impedance matrix for the series network by calculating the sum of the individual impedances. The following equation illustrates the calculations for two 2-port circuits.

    [Z]=[Z]+[Z]=[Z11+Z11Z12+Z12Z21+Z21Z22+Z22]

  3. Finally, analyze converts the impedance matrix of the series network to S-parameters at the frequencies specified in the analyze input argument freq.

The analyze method uses the series S-parameters to calculate the group delay values at the frequencies specified in the analyze input argument freq, as described in the analyze reference page.

Examples

tx1 = rfckt.txline;
tx2 = rfckt.txline;
ser = rfckt.series('Ckts',{tx1,tx2})
analyze(ser,[1e9:1e7:2e9]);
ser.AnalyzedResult

ans =

    Name: 'Data object'
    Freq: [101x1 double]
    S_Parameters: [2x2x101 double]
    GroupDelay: [101x1 double]
    NF: [101x1 double]
    OIP3: [101x1 double]
    Z0: 50
    ZS: 50
    ZL: 50
    IntpType: 'Linear'
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