Z-Parameters Passive Network

Model passive network using Z-parameters

• 

Libraries:
RF Blockset / Equivalent Baseband / Black Box Elements

Description

The Z-Parameters Passive Network block models a two-port passive network described in terms of its Z-parameters and their associated frequencies.

In the Z-Parameters field of the block dialog box, provide the Z-parameters for each of the M frequencies as a 2-by-2-by-M array. In the Frequency field, specify the frequencies for the Z-parameters as an M-element vector. The elements of the vector must be in the same order as the Z-parameters. For example, the following figure shows the correspondence between the Z-parameters array and the vector of frequencies.

The Z-Parameters Passive Network block uses the RF Toolbox™ z2s function to convert the Z-parameters to S-parameters, and then interpolates the resulting S-parameters to determine their values at the modeling frequencies. The modeling frequencies are determined by the Output Port block. See Map Network Parameters to Modeling Frequencies for more details.

Parameters

Main

Z-Parameters — Z-parameters for two-port passive network

[50,0;100,50] (default) | 2-by-2-by-M array

Z-parameters for a two-port passive network, specified as a 2-by-2-by-M array where M is the number of Z-parameters.

Frequency (Hz) — Frequency of Z-parameters

2.0e9 (default) | M-element vector

Frequency of Z-parameters, specified as an M-element vector with each element unit in hertz. All frequencies must be positive.

Interpolation method — Method to interpolate network parameters

Linear (default) | Spline | Cubic

Method to interpolate the network parameters, specified as one of the following:

Method	Description
Linear	Linear interpolation
Spline	Cubic spline interpolation
Cubic	Piecewise cubic Hermite interpolation

Visualization

Source of frequency data — Frequency data source

Same as the Z-Parameters (default) | User-specified

Frequency data source, specified as Same as the Z-Parameters or User-specified.

Frequency data (Hz) — Frequency data range

[1.9e9:1.0e6:2.2e9] (default) | vector

Frequency data range, specified as a vector with each element unit in hertz.

Plot type — Type of data plot

X-Y plane (default) | Composite data | Polar plane | Z Smith chart | Y Smith chart | ZY Smith chart

Type of data plot to visualize using the given data, specified as one of the following:

• X-Y plane — Generate a Cartesian plot of the data versus frequency. To create linear, semilog, or log-log plots, set the Y-axis scale and X-axis scale accordingly.

• Composite data — Plot the composite data. For more information, see Create Plots Using Equivalent Baseband Library Blocks.

• Polar plane — Generate a polar plot of the data. The block plots only the range of data corresponding to the specified frequencies.

• Z smith chart, Y smith chart, and ZY smith chart — Generate a Smith^® chart. The block plots only the range of data corresponding to the specified frequencies.

Y parameter1 — Type of parameters to plot

S11 (default) | S12 | S21 | S22 | GroupDelay | OIP3 | IIP3 | NF | ...

Type of parameters to plot, specified as one of the following:

S11	S12	S21	S22
GroupDelay	GammaIn	GammaOut	VSWRIn
VSWROut	OIP3	IIP3	NF
NFactor	NTemp	TF1	TF2
TF3	Gt	Ga	Gp
Gmag	Gmsg	GammaMS	GammaML
K	Delta	Mu	MuPrime

Note

Y parameter1 is disabled when you select Plot type to Composite data.

Y parameter2 — Type of parameters to plot

S11 (default) | S12 | S21 | S22 | GroupDelay | OIP3 | IIP3 | NF | ...

Type of parameters to plot, specified as one of the following:

S11	S12	S21	S22
GroupDelay	GammaIn	GammaOut	VSWRIn
VSWROut	OIP3	IIP3	NF
NFactor	NTemp	TF1	TF2
TF3	Gt	Ga	Gp
Gmag	Gmsg	GammaMS	GammaML
K	Delta	Mu	MuPrime

Note

Y parameter2 is disabled when you select Plot type to Composite data.

Y format1 — Plot format

Magnitude (decibels) (default) | Mag | Magnitude (linear) | Angle | Real | Imaginary | ...

Plot format, specified as one of the following.

Y parameter1	Y format1
S11, S12, S21, S22, GammaIn, GammaOut, TF1, TF2, TF3, GammaMS, GammaML, and Delta.	dB, Magnitude (decibels), Abs, Mag, Magnitude (linear), Angle, Angle(degrees), Angle(radians), Real, Imag, and Imaginary.
GroupDelay	ns, us, ms, s, and ps.
VSWRIn and VSWROut.	Magnitude (decibels) and None.
OIP3 and IIP3.	dBm, W, and mW.
NF	dB and Magnitude (decibels).
NFactor, K, Mu, and MuPrime.	None
NTemp	Kelvin
Gt, Ga, Gp, Gmag, and Gmsg.	dB, Magnitude (decibels), and None.

Dependencies

To enable Y format1, set Plot type to X-Y plane.

Y format2 — Plot format

Magnitude (decibels) (default) | Mag | Magnitude (linear) | Angle | Real | Imaginary | ...

Plot format, specified as one of the following.

Y parameter2	Y format2
S11, S12, S21, S22, GammaIn, GammaOut, TF1, TF2, TF3, GammaMS, GammaML, and Delta.	dB, Magnitude (decibels), Abs, Mag, Magnitude (linear), Angle, Angle(degrees), Angle(radians), Real, Imag, and Imaginary.
GroupDelay	ns, us, ms, s, and ps.
VSWRIn and VSWROut.	Magnitude (decibels) and None.
OIP3 and IIP3.	dBm, W, and mW.
NF	dB and Magnitude (decibels).
NFactor, K, Mu, and MuPrime.	None
NTemp	Kelvin
Gt, Ga, Gp, Gmag, and Gmsg.	dB, Magnitude (decibels), and None.

Dependencies

To enable Y format2, set Plot type to X-Y plane.

X parameter — Frequency plot

Freq (default)

Frequency plot, specified as Freq.

X format — Frequency plot format

Hz (default) | Auto | kHz | MHz | GHz | THz

Frequency plot format, specified as one of the following.

Auto	Hz	kHz	MHz
GHz	THz

Y scale — Y-axis scale

Linear (default) | Log

Y-axis scale, specified as Linear or Log.

Dependencies

To enable this parameter, set Plot type to X-Y plane.

X scale — X-axis scale

Linear (default) | Log

X-axis scale, specified as Linear or Log.

Dependencies

To enable this parameter, set Plot type to X-Y plane.

Plot — Plot specified data

button

Plot specified data using the plot button.

Version History

Introduced before R2006a