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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amplifierAmplifier object
resistorResistor object
capacitorCapacitor object
inductorInductor object
lcladderLC ladder object
nportCreate linear n-port circuit element
circuitCircuit object
modulatorModulator object
rfelementGeneric RF element object
rffilterCreate RF filter object
txlineCoaxialCreate coaxial transmission line
txlineCPWCreate coplanar waveguide transmission line
txlineMicrostripCreate microstrip transmission line
txlineParallelPlateCreate parallel-plate transmission line
txlineRLCGLineCreate RLCG line transmission line
txlineTwoWireCreate two-wire transmission line
rfckt.amplifierRF Amplifier
rfckt.cascadeCascaded network
rfckt.coaxialCoaxial transmission line
rfckt.cpwCoplanar waveguide transmission line
rfckt.datafileComponent or network from file data
rfckt.delayDelay line
rfckt.hybridHybrid connected network
rfckt.hybridgInverse hybrid connected network
rfckt.mixer2-port representation of RF mixer and its local oscillator
rfckt.microstripMicrostrip transmission line
rfckt.passivePassive component or network
rfckt.parallelParallel connected network
rfckt.parallelplateParallel-plate transmission line
rfckt.rlcglinePassive component or network
rfckt.seriesSeries connected network
rfckt.seriesrlcSeries RLC component
rfckt.shuntrlcShunt RLC component
rfckt.twowireTwo-wire transmission line
rfckt.txlineGeneral transmission line

Functions

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sparametersS-parameter object
groupdelayGroup delay of S-parameter object or RF filter object or RF Toolbox circuit object
copyCopy circuit or data object
cascadesparamsCombine S-parameters to form cascade network
addInsert circuit element or circuit object into circuit
setportsSet ports of circuit object
setterminalsSet terminals of circuit object
cloneCreate copy of existing circuit element or circuit object
rationalfitPerform rationalfit on an S-parameters object
analyzeAnalyze RFCKT object in frequency domain
calculateCalculate specified parameters for rfckt objects or rfdata objects
circleDraw circles on Smith Chart
extractExtract specified network parameters from rfckt object or data object
listformatList valid formats for specified circuit object parameter
listparamList valid parameters for specified circuit object
loglogPlot specified circuit object parameters using log-log scale
plotPlot specified circuit object parameters on X-Y plane
plotyyPlot specified parameters on X-Y plane with Y-axes on both left and right sides
getopDisplay operating conditions
polarPlot specified object parameters on polar coordinates
semilogxPlot specified circuit object parameters using log scale for x-axis
semilogyPlot specified circuit object parameters using log scale for y-axis
smithPlot specified circuit object parameters on Smith chart
writeWrite RF data from circuit or data object to file
getz0Get characteristic impedance of transmission line object
readRead RF data from file to new or existing circuit or data object
restoreRestore data to original frequencies
setopSet operating conditions
groupdelayGroup delay of S-parameter object or RF filter object or RF Toolbox circuit object

Topics

Specify Operating Conditions

Explains how to set and retrieve operating condition values.

Manage Circuits and Sessions

Describes the RF Design and Analysis app circuit and session operations.

Model an RF Network

Describes how to build and analyze an RF network and export the network to the MATLAB® workspace.

Analyze Circuits

Describes setting parameters for circuit analysis and perform the analysis.

RF Circuit Objects

Describes the available RF circuit objects and their uses.

Featured Examples

Analysis of Coplanar Waveguide Transmission line in X band application

Analysis of Coplanar Waveguide Transmission line in X band application

Analyze a coplanar waveguide (cpw) transmission line for X-band applications. CPW transmission line consists of a central metal strip separated by a narrow gap from two ground planes on either side. The dimensions of the center strip, the gap, the thickness, and permittivity of the dielectric substrate determine the characteristic impedance, group delay, and noise. The gap in the cpw is usually very small and supports electric fields primarily concentrated in the dielectric.

Open Live Script
Design Two-Stage Low Noise Amplifier Using Microstrip Transmission Line Matching Network

Design Two-Stage Low Noise Amplifier Using Microstrip Transmission Line Matching Network

Use the RF Toolbox™ microstrip transmission line element to design two-stage low noise amplifier (LNA) for wireless local area network (WLAN) with an input and the output matching network (MNW) to maximize the power delivered through a 50-ohm load and the system.

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MOS Interconnect and Crosstalk

MOS Interconnect and Crosstalk

Build and simulate an RC tree circuit using the RF Toolbox.

Open Live Script
RF Circuit Objects

RF Circuit Objects

Create and use RF Toolbox™ circuit objects. In this example, you create three circuit (rfckt) objects: two transmission lines and an amplifier. You visualize the amplifier data using RF Toolbox™ functions and retrieve frequency data that was read from a file into the amplifier rfckt object. Then you analyze the amplifier over a different frequency range and visualize the results. Next, you cascade the three circuits to create a cascaded rfckt object. Then you analyze the cascaded network and visualize its S-parameters over the original frequency range of the amplifier. Finally, you plot the S11, S22, and S21 parameters and noise figure of the cascaded network.

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Data Analysis on S-parameters of RF Data Files

Data Analysis on S-parameters of RF Data Files

Perform statistical analysis on a set of S-parameter data files using magnitude, mean, and standard deviation (STD). First, read twelve S-parameter files representing twelve similar RF filters into the MATLAB® workspace and plot them. Next, plot and analyze the passband response of these filters to ensure they meet statistical norms.

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MOS Interconnect and Crosstalk Using RFCKT Objects

MOS Interconnect and Crosstalk Using RFCKT Objects

Build and simulate an RC tree circuit using the RF Toolbox.

Open Live Script

RF Toolbox Documentation

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