Hi i have simulated a cpw coupler in cst and now i want to import the s parameter file in s2p format in matlab for further processing. You can write data into these files using several different rf toolbox functions. Connect, save s2p file and display logmag, smith chart and tdr step response. Sparameter object matlab sparameters mathworks france. The function calculates this value automatically when you create the object. With these matlab scripts you can connect to your nanovna, execute commands, get s11 and s21 data, save it to s2p file and plot logmag, smith chart and tdr step response. If you are using the dvd, the matlab installer should start automatically. Rsplot can read s2p files of different network parameters. For instance, see this example, which maps a file of 100 doubleprecision floatingpoint numbers to memory. In this example, you create an sparameters object by reading the sparameters of a 2port passive network stored in the touchstone format data file, passive.
How do i develop a matlab program for the conversion of s. Question can the fourport network analyzer export touchstone s2p files. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files. Help needed in matlab programming keysight community. To see whats in the file you need to use load to load the saved signals into the matlab workspace.
You can get s11 and s21 for any freq range, save it to s2p file, make different plots, include s11, s21, phase, impedance, smith chart and tdr. Frequencies sparameter frequencies, specified as a kby1 vector of positive real numbers sorted from smallest to largest. Index in position 1 exceeds array bounds must not exceed 1 i am using the following code to generate the sparameters of a dipole antenna and save in a. Matlab scripts for nanovna vector network analyzer. This video shows how to plot snptouchstone file in matlab. Save sparameter in matlab matlab answers matlab central. This matlab function writes information from data to the specified file. Time domain touchstone file format is similar to frequency domain touchstone except the xaxis unit is time s, ns instead of frequency hz, mhz. Plot sparameter data matlab rfplot mathworks united.
This file contains 50ohm sparameters at frequencies ranging from 315 khz to 6 ghz. How to change extension of selected file extensions in a. This matlab function creates an sparameter object sobj by importing data from the touchstone file specified by filename. I have been trying to use dlmread to read in an sparameter file s2p file, but have had issues. Windows 10 or windows cannot open this file windows 7 or a similar maciphoneandroid alert. This matlab function plots the magnitude in db versus frequency of all s parameters s11, s12. I want to get the s21 data and store in some variable and then repeat the.
There can be up to 16,000 data points records in each file. All can be done from matlab environment and it dont requires any external application. Matlab matrix laboratory is a multiparadigm numerical computing environment and proprietary programming language developed by mathworks it allows matrix manipulation and implementations of algorithms. S2p files can be stored with various types of data such as s, z, y, h, or t parameters. Mathworks is the leading developer of mathematical computing software for engineers and scientists.
Need to find a way to quickly decipher and plot sparameters for tons of. How to open an s2p file you need a suitable software like sonnet file to open an s2p file. Write rf data from circuit or data object to file matlab. Opening one as a text file is always going to show odd random characters. File extension s2p simple tips how to open the s2p file. Use the rf toolbox sparameters command to read the touchstone data file, passive. Four steps to building smarter rf systems with matlab download white paper. Use the rf toolbox read command to read the touchstone data file, passive. There may be other problems that also block our ability to operate the touchstone 4 sparameters data file. You can follow the same procedure to plot s21 from s2p file. Reading an s2p file issues matlab answers matlab central. Read and analyze rf data from a touchstone data file. Heres my code as it stands where should i be going next. To know the exact size of your matlab installation, below are the steps to be followed.
Use the rfwrite function to write the data to a file. We include it as an example of using rf toolbox and matlab to manipulate network parameters mathematically. Follow the installation steps according to the installation guide. Trial software extract the data from s2p file in matlab. I am able to plot all the index at once or plot one index at a time. Read here what the s2p file is, and what application you need to open or convert it. Without proper software you will receive a windows message how do you want to open this file. You can also user matlab s memorymapping of data files to read in a block of the file, process it, and proceed to the next block without having to load the entire file into memory at once. The s2p file type is primarily associated with sonnet file. I have taken measurements of the reflection coefficients of a saw resonator using a vector network analyser. The s2p file format was originally created for touchstone and has the extension. Now i want to develop a matlab program to convert the. Hi all i have set a text file in discrete data format to access mutiple s2p files.
Write a touchstone file using data and frequency values. I want to extract the data from s2p file which contains s11,s21,s12,s22 data. Write rf network data to touchstone file matlab rfwrite. Trial software how do i save data to a file in matlab. The s2p reader you found looks much better, but you might find these. I released matlab scripts, they allows to connect and read s11 and s21 data directly from nanovna.
Now, sxpparse hangs up trying to parse the first line of numerical data. You can also create charts and plots using the rf design and analysis tool the rf domain uses many types of data files, including industrystandard touchstone files. Answer yes, you have two options for creating an s2p file with the network analyzer regardless of the type of analyzer. Use the type function to display the contents of the. Write rf data from circuit or data object to file matlab write. The inability to open and operate the s2p file does not necessarily mean that you do not have an appropriate software installed on your computer. But matlab tells me the input must be a row of vectors of characters or string vector i am not understanding exactly how this functions. Write a touchstone file using network object parameters. This example shows how to write out the data in rfckt objects you create in the matlab workspace into an industrystandard data file. If you cannot open your s2p file correctly, try to rightclick or. In this example, i plotted s11 from s1p file in matlab.
Follow 1 view last 30 days alexandria willcole on 14 nov 2018. However, i am not able to plot index which are are not continous. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer. This example shows you how to extract the sparameters of a device under test dut using the deembedsparams function this example will use the sparameter data in the file samplebjt2. The matlab designs processes with a programming language that expresses matrix and array mathematics directly.
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