RF Network Construction

Create RF circuits for frequency domain analysis

Use these RF Toolbox™ circuit objects and functions such as capacitor , inductor, and resistor to create arbitrary networks and calculate the S-parameters and group delay.

Alternatively, use the RFCKT objects and functions to define RF network components and connect them in series, parallel, cascade, hybrid, and inverse hybrid configurations. Then you can use these networks to perform additional RF analysis.

Objects

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Circuit

Basic Elements

`resistor`	Resistor object
`capacitor`	Capacitor object
`inductor`	Inductor object
`circuit`	Circuit object

Linear Elements

`attenuator`	Create two-port attenuator element
`rfantenna`	Create antenna element modeled as transmitter, receiver, or transmit-receive
`rffilter`	Create Butterworth, Chebyshev, and inverse Chebyshev RF filter
`nport`	Create linear n-port circuit element
`lcladder`	Create LC ladder network
`seriesRLC`	Create two-port series RLC circuit
`shuntRLC`	Create two-port shunt RLC circuit
`phaseshift`	Create phase-shift circuit (Since R2021b)
`mutualInductor`	Create mutual inductor element (Since R2023a)
`rfdivider`	Create three-port Wilkinson power divider element for `circuit` object (Since R2023a)

Linear Elements—Transmission Lines

`txlineCoaxial`	Create coaxial transmission line
`txlineCPW`	Create coplanar waveguide transmission line
`txlineMicrostrip`	Create microstrip transmission line
`txlineParallelPlate`	Create parallel-plate transmission line
`txlineLumped`	Create lumped transmission line (Since R2023a)
`txlineRLCGLine`	Create RLCG transmission line
`txlineTwoWire`	Create two-wire transmission line
`txlineStripline`	Create stripline transmission line element (Since R2022a)
`txlineEquationBased`	Create equation-based transmission line
`txlineDelayLossless`	Create delay lossless transmission line
`txlineDelayLossy`	Create delay lossy transmission line
`txlineElectricalLength`	Create electrical-length-based transmission line (Since R2021b)
`txlineWRLGC`	Create lossy RLGC transmission line (Since R2026a)
`txlineWtable`	Create table-based lossy transmission line (Since R2026a)

Nonlinear Elements

`amplifier`	Create two-port amplifier element
`modulator`	Modulator object
`rfelement`	Generic RF element object
`mixerIMT`	Create IMT mixer element (Since R2022a)

Third-Party Components

`mdlxPart`	Create Modelithics component (Since R2023a)
`mdlxLibrary`	Create Modelithics library object (Since R2023a)
`mdlxSetup`	Set up Modelithics library (Since R2023a)
`rfSystemParameters`	RF system parameter for amplifiers, modulators, or generic RF element (Since R2026a)
`rfPartSelector`	Select amplifiers from third-party database (Since R2026a)

RFCKT

`rfckt.amplifier`	Create RF Amplifier
`rfckt.cascade`	Cascaded network
`rfckt.coaxial`	Coaxial transmission line
`rfckt.cpw`	Coplanar waveguide transmission line
`rfckt.datafile`	Component or network from file data
`rfckt.delay`	Delay line
`rfckt.hybrid`	Hybrid connected network
`rfckt.hybridg`	Inverse hybrid connected network
`rfckt.mixer`	2-port representation of RF mixer and its local oscillator
`rfckt.microstrip`	Microstrip transmission line
`rfckt.passive`	Passive component or network
`rfckt.parallel`	Parallel connected network
`rfckt.parallelplate`	Parallel-plate transmission line
`rfckt.rlcgline`	Passive component or network
`rfckt.series`	Series connected network
`rfckt.seriesrlc`	Series RLC component
`rfckt.shuntrlc`	Shunt RLC component
`rfckt.twowire`	Two-wire transmission line
`rfckt.txline`	General transmission line

Functions

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Circuit

`richards`	Convert lumped element circuit to distributed element circuit using Richards' transformation (Since R2021b)
`kuroda`	Apply Kuroda's transformation based on Kuroda's identities (Since R2021b)
`sparameters`	Calculate S-parameters for RF data, network, circuit, and matching network objects
`groupdelay`	Group delay of S-parameter, RF filter, or RF Toolbox circuit object
`copy`	Copy circuit or data object
`cascadesparams`	Combine S-parameters to form cascade network
`add`	Insert circuit element or circuit object into circuit
`delete`	Delete circuit object and decouple its elements (Since R2022a)
`setports`	Set ports of circuit object
`setterminals`	Set terminals of circuit object
`clone`	Create copy of existing circuit element or circuit object
`noisefigure`	Calculate noise figure of transmission lines, series RLC, and shunt RLC circuits
`noiseParameters`	Extract noise data from Touchstone file or build noise figure data (Since R2022a)

Third-Party Components

`search`	Search Modelithics component of interest (Since R2023a)
`datasheet`	Open datasheet of Modelithics component (Since R2023a)
`add`	Add search parameters to `rfPartSelector` object (Since R2026a)
`remove`	Remove search parameters from `rfPartSelector` object (Since R2026a)
`show`	Display selected third-party components (Since R2026a)
`rfPart`	Create RF component from selected third-party components (Since R2026a)

RFCKT

`analyze`	Analyze RFCKT object in frequency domain
`calculate`	Calculate specified parameters for rfckt objects or rfdata objects
`circle`	Draw circles on Smith Chart
`extract`	Extract specified network parameters from rfckt object or data object
`listformat`	List valid formats for specified circuit object parameter
`listparam`	List valid parameters for specified circuit object
`loglog`	Plot specified circuit object parameters using log-log scale
`plot`	Plot circuit object parameters on X-Y plane
`plotyy`	Plot parameters of RF circuit or RF data on xy-plane with two Y-axes
`getop`	Display operating conditions
`polar`	Plot specified object parameters on polar coordinates
`semilogx`	Plot RF circuit object parameters using log scale for x-axis
`semilogy`	Plot RF circuit object parameters using log scale for y-axis
`smith`	Plot circuit object parameters on Smith Chart
`write`	Write RF data from circuit or data object to file
`getz0`	Calculate characteristic impedance of RFCKT transmission line object
`read`	Read RF data from file to new or existing circuit or data object
`restore`	Restore data to original frequencies
`setop`	Set operating conditions
`groupdelay`	Group delay of S-parameter, RF filter, or RF Toolbox circuit object

Tools

RF Part Catalog

Select amplifier from third-party component database (Since R2026a)

Topics

RF circuit or rfbudget vs. rfckt Objects
Determine when to use RF circuit, rfbudget, and rfckt objects in your RF analysis workflow.
Specify Operating Conditions
Explains how to set and retrieve operating condition values.