![]() ![]() The elements of the S-parameter matrix are complex and can be visualized on a Cartesian plot in terms of magnitude and phase or on a polar plot. Visualization is the first step for inspecting S-parameter data. S-parameter data can also be analytically calculated for a given component prior to its realization via behavioral models, circuit analysis, and electromagnetic simulation, as offered, for example, by Antenna Toolbox™ and RF PCB Toolbox™. Automated workflows enable scale-up testing, validating scenarios, extracting statistical information on device performance, and easily sharing results with customers and colleagues. RF Toolbox and Instrument Control Toolbox™ allow you to combine S-parameter measurements and data analysis. Typical tasks include de-embedding, cascading, and visualizing S-parameters. As a result, RF test engineers must often process a large amount of S-parameter data. S-parameters are measured using vector network analyzers (VNAs) over different operating conditions. Measuring and Visualizing S-Parameters with MATLAB Most RF analysis tools and simulators can read and write Touchstone files, thus making them a portable file format to exchange measurements and design information. Portable: S-parameters are often stored in a standard file format called Touchstone ®. ![]() Benefits of Using S-ParametersĮasier to measure than Y or Z matrices: The measurement of Y or Z parameters requires open- and short-circuit terminations that are challenging to maintain at RF and microwave frequencies, therefore their measurement is less reliable than S-parameters.įlexible: For circuit analysis or simulation, S-parameters can be easily converted to Z-parameters, Y-parameters, and other linear matrices. ![]() The value of S 11 provides a direct measure of the port matching condition, that is, S 11= 1 represents an open circuit S 11= -1 represents a short circuit and S 11= 0 represents a perfectly matched circuit. The functions were developed with R11.1, but they work with R13.In this example, S 11 is defined as the ratio of the reflected wave to the incident wave at port-1 while port-2 is terminated on the characteristic impedance. Usage examples are found throughout the above text. The toolbox includes functions for the design and analysis of multilayer film structures, antireflection coatings, polarizers, omnidirectional mirrors, narrow-band transmission filters, birefringent multilayer films and giant birefringent optics impedance matching methods, quarter-wavelength multisection Chebyshev transformers, stub matching, and L, Pi and T-section reactive matching networks analysis of transmission lines and waveguides S-parameters, Smith charts, stability and gain circles, noise figure circles, and microwave amplifier design computation of directivities and patterns of linear and aperture antennas horn design computation of diffraction integrals and knife-edge diffraction coefficients antenna array design methods for sector and narrow beams numerical methods for the Hallen and Pocklington integral equations computation of self and mutual antenna impedances coupled antennas various types of azimuthal and polar gain plots and several movies showing the propagation of pulses on terminated transmission lines and on cascaded lines, reflections from reactive terminations, fault location by TDR, crosstalk signals on coupled lines, and time-evolution of the field radiated by a Hertzian dipole antenna. The book may be downloaded from the web page A toolbox of functions to accompany the author's online book on "Electromagnetic Waves & Antennas". ![]()
0 Comments
Leave a Reply. |