Classes and functions for handling RF/Microwave data from touchstone files
npm install rf-networkA javascript class for holding data from Touchstone v1 files.
You will need to parse the Touchstone file into a string before using this class. This can be done in browser Javascript with an input of type file, or in node using fs.readFile().
To load the stringified touchstone file into the Network class, use the following.
The filename is passed to the Network constructor to simplify determining the number of ports as well as in error checking.
``
import Network from 'rf-network'
const network = new Network(touchStoneFileString: string, fileName: string)
network.data // returns an array of network data
`
network.data returns the following Typescript interface
`
interface NetworkData {
freq: number[]
s: math.Complex[][][]
}
__network.data.freq__ is an array of all the frequency points.
__network.data.s__ is a 3-dimensional array. The first and second indeces are the index of the S-parameters. The final dimension contains an array of complex numbers (from the math.js library). This array has equal length to the Network.data.freq, and contains the S-parameter at each frequency.
By default, the S-parameters will be converted to complex number format (R/I format).
The S-parameters are zero-indexed. As an example, if you load an .s2p (two-port) S-parameter file, you would get S21 by accessing network.data.s[1][0].
You can currently access the following properties on the Network class.
`
network.touchstoneText // string text from the touchstone file
network.label // a label for the plot, can be changed with setLabel
network.fileName // the original file name
data // the array of network data
nPorts // the number of ports
freqUnit // frequency unit, ie, GHz
paramType // S, Y, Z - currently only supports S-params
z0 - The characteristic impedance
setLabel(newLabel: string) // give a new label to the plot
``