General Circuit Element

Model two-port network described by rfckt object

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Libraries:
RF Blockset / Equivalent Baseband / Black Box Elements

Description

The General Circuit Element block models the two-port network described by an RF Toolbox™ circuit (rfckt) object. The block uses the rfckt/analyze method to calculate the network parameters at the modeling frequencies.

To learn how you can use General Circuit Elementblock to realize cascaded filters, see Multiple Realizations of Cascaded Filters example.

Examples

Multiple Realizations of Cascaded Filters

Learn three different ways to implement filters.

• Open Script

Parameters

Main

RFCKT object — RFCKT object that contains circuit element device data

read(rfckt.passive, 'passive.s2p') (default) | any rfckt object

RFCKT object that contains circuit element device data, specified as an any RF Toolbox rfckt object that creates a default circuit object of the specified type, or a MATLAB^® expression that generates such an object. See RF Circuit Objects for more information about circuit objects.

Visualization

Source of frequency data — Frequency data source

User-specified (default)

Frequency data source, specified as 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.

Reference impedance (ohms) — Reference impedance

50 (default) | nonnegative scalar

Reference impedance, specified as a nonnegative scalar in ohms.

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