![]() ![]() In this part, we jump into the RF aspect of low noise amplifiers by examining stability (tendency for oscillation), impedance matching, and general amplifier design, using scattering parameters (S-parameters) as design tools. In Part 1, we started our discussion with a brief background on transmission lines and a reminder about RF power gain definitions. Emphasis is on S-parameters as design tools. Stability, impedance matching and general amplifier design are covered. This part covers the RF aspects of low-noise amplifiers. The tool can deal with voltage reflection coefficient / power.Ĭlick here to learn more about the 3D Smith Chart.Part two of a three-part series. The ports have complex characteristic impedances too. The tool proposes a dynamic frequency sweep to tune live the device under study. Inductance and quality factors visualization in 3D Dynamic Frequency Sweep & Complex Ports 3D frequency sweeping - orientation visualization. Parameters are plot on both 2D& 3D Smith charts in Z/Y reconfigurable format. Choose from the 5 paths (r,x,g,b,lat) and add normalized r,x,g,b, /stubs equivalents or lossless transmission lines S ParamtersĪny s1p and s2p files can be imported (touchstone format). Match circuits on 5 constant resistance, reactance, conductance, susceptance and constant reflection coefficient’s magnitude circles. Can be displayed over the constant gain circles which are on the surface. 3D Unilateral Transducer Gain & Group Delays & Quality FactorsģD Space surrounding the chart is used to plot power gains too. Circles which are never closed on the Smith chart get together in the South hemisphere. Unconditionally stable: south hemisphere. Works for all active & passive microwave circuits, even with negative resistance! South hemisphere for negative resistance, North hemisphere for positive resistance, East inductive, West capacitive Amplifier Stability Circles Key Features of the 3D Smith Chart Active & Passive Circuits The simultaneous display of a variety of parameters form imported touchstone files speeds up the analysis phase and helps in the optimizations of the high frequency devices. The tool also has an advanced analysis mode for S-parameters, stability circles, power levels, group delays and quality factors making it a new software for the measuring stage or design stage of microwave devices. ![]() The 3D Smith Chart tool is an educational tool for easy and fast understanding and use of both 2D and 3D Smith charts in Z/Y configurations when using resistances, capacitors, inductors, in series or shunt configuration, transmission lines or stubs. Since its invention in the early to mid 20th Century the Smith Chart has been a 2D tool that can be printed out on paper and used to display multiple parameters like impedances, admittances, reflection coefficients etc. The Smith chart is fundamental tool used by RF engineers to assist in solving problems with transmission lines and matching circuits. Click here to learn more about the 3D Smith Chart. The improved tool now enables, full 3D visualization, intuitive user interface, easy installation as well as state of the art concepts. The 3D Smith Chart tool, meant to help understand and use both the 2D Smith chart and the 3D Smith chart, has now been made available free of cost for all undergraduate, masters and PhD students. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |