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.
Add the second lossless element to tune out the remaining imaginary part, reactance or susceptance, so the resultant impedance or admittance is a real number 1 (\(z=1+j0\) or \(y=1+j0\)). Add a lossless element, capacitor or inductor, to get the real part of either impedance or admittance to be 1. The very basic RULES of impedance matching are: However, I would not suggest to use lumped elements for impedance matching over 5 GHz because it’s hard to find small enough elements, value and size, and the path length will play a main role for the matching process. Theoretically all these 4 types of impedance can be perfectly matched into 50Ω by using only 2 lumped elements, inductors and capacitors, if not considering the limited amount of component values we are able to get as well as their tolerances. 1 Four types of impedance in the Smith chart. Only after finishing reading the sequence and knowing all basics, you then can use this skill effectively.īased on the values of r, g, x, and b, we can roughly categorize the impedance into 4 different types:įig. However, if you are vague to the Smith chart then you should STOP here and go back to learn the Smith Chart Basics first. The only thing you need to do is enter S11 or to-be-matched impe dance and you’ll get the approximate result by following all steps. In this article you’ll learn the step-by-step guide to match Type #1 and Type #2 impedance by simply using Smith chart without knowing those formulas. Impedance Matching-Using Lump Elements, Formulas, and Conversions-Part II. 
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:
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