The L match circuit gets its name due to the circuit topology – resembling the letter “L”. Some of its key features are displays insertion loss/gain of S1P and S2P files, real-time optimization and tuning, plot markers, snap-shot feature to hold static plots, on-tool transmission-line calculator, return loss plots to all input and output ports, ability to create a match report in word and thru-line function that displays input source impedance and output load. It displays the impedance of the input and output match in a 50Ω test environment as measured on a network analyzer.
Smith chart matching free#
Impedance Matching by Using Smith Chart – A Step-by-Step Guide, Part II.Qorvo MatchCalc is a free downloadable RF/microwave matching calculator with ideal tunable passive components.← Impedance Matching-Using Lump Elements, Formulas, and Conversions-Part II.Visit ABOUT to see what you can learn from this blog.’ ‘Note: This is an article written by an RF engineer who has worked in this field for over 40 years. We’ll continue to discuss Type #3 and Type #4 impedance matching in the next article. Question: Match this Type #2 impedance \(z=0.5+j0.3\) using Smith chart. 11 Type #2 impedance matching, Step 1 & Step 2Īnd the admittance values of added elements are: We then follow the 2nd rule and move both points O1-S1 & O2-S1 along the \(g=1\) circle to the origin \(z=1\) by simply adding an inductor, Option #1, or a capacitor, Option #2, in shunt respectively.įig. We can fairly accurately read the locations of both points in the Smith chart:
Smith chart matching series#
The only options to satisfy this first rule is add a capacitor, Option #1, or an inductor, Option #2, in series to move the impedance \(z\) along the \(r=0.4\) circle until meeting \(g=1\) circle at points O1-S1 & O2-S1.įig. 8, we can simultaneously read the impedance \(z\) and admittance \(y\) of point X:įollow the first basic rule of impedance matching, add a lossless element, capacitor or inductor, to get the real part of either impedance or admittance to be 1. 8 Type #2 impedance in the Smith chartĪs showed in Fig. Locate the impedance \(z=r+jx\) in the Smith chart, point X.įig.
![smith chart matching smith chart matching](https://www.rfcafe.com/references/electrical/images/Simple-Visio-Smith-Chart-Forbidden-LowLeft.png)
If the impedance is \(Z=R+jX\), then the normalized impedance is \(z=Z/50=r+jx\).ģ.
Smith chart matching how to#
If return loss \(S_\) or reflection coefficient \(Γ\) is given by datasheets, then refer to this article Smith Charts-Basics, Parameters, Equations, and Plots to learn how to convert the number to impedance.Ģ.
![smith chart matching smith chart matching](https://i.ytimg.com/vi/8t5IfH4Jbl4/maxresdefault.jpg)
The process to match a Type #1 impedance into 50Ω:ġ. Type #1 impedance is located within the area of \(r=1\) circle. Matching Type #1 impedance: r ≥ 1, x any value.
![smith chart matching smith chart matching](https://www.rfcafe.com/references/electrical/images/Simple-Visio-Smith-Chart-Forbidden-LowRight.png)
Impedance Matching-Using Lump Elements, Formulas, and Conversions-Part I. We have learned the impedance matching for all 4 Types of impedance using formulas & their conversions, and it’s recommended to visit these 2 articles before you continue to read further here: