SWR circles are also provided for the sake of illustration. of EECS For example, if the length of the transmission line terminated in zj L0.6 1.4 is A0.307, we should rotate around the Smith Chart a total of 21.228A radians, or 221D. Notice that the location of the marker is independent of grid type,Īnd only the Smith Chart grid enables reading the load impedance (ZL) by inspection. Zin Calculations using the Smith Chart.doc 4/7 Jim Stiles The Univ. The Smith Chart achieves this by superimposingĪ grid on S11 that maps load impedance. Normalized to Z0 (source impedance = center of chart). The Smith Chart graphically maps S11=reflection coefficient=(ZL-Z0)/(ZL+Z0) to Load Impedance (ZL), Y and Delta Network Transformation Calculator Y Impedance, R1 (Ohms) =ġ:N Resistive Splitter Calculator Port Characteristic Impedance, Zo (Ohms) = Port 2 Characteristic Impedance, Z2 (Ohms) = Pi and Tee Attenuator Pad Calculator Port 1 Characteristic Impedance, Z1 (Ohms) =
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%Tolerance indicates the additional +/- part to psrt Note: %Error indicates the nominal difference to the Vout %Tol (From 0.1% Component Tolerance) = Vout %Tol (From 1% Component Tolerance) = up conversions between SWR, return loss, and reflection coefficient.
#SMITH CHART REFLECTION COEFFICIENT CALCULATOR HOW TO#
Tpd (unloaded propagation delay, ps/unit len) = Learn how to use the Smith Chart matching software on RFMentor in less than 10. Inch Zo (unloaded trace impedance, Ohms) = The Smith Chart as a Calculator for Matching Networks. Note: FR4 Thermal conductivity = 0.24 to 0.34 W/(m.K)Ĭapacitively Loaded Transmission Line Calculator Note: valid for w>h and len>h (excludes fringing capacitance) Pad Capacitance and Thermal Resistance Calculator Note: valid for w>h and len>h, includes fringing capacitance
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Note: valid for (w/h) from 0.1 to 2.0 and (t/h) less than 0.25ĭifferential Stripline Impedance Calculatorĭifferential Stripline From Zo Impedance CalculatorĪsymmetric Stripline Impedance Calculatorīroadside Coupled Stripline Impedance Calculator w (trace width) =ĭifferential Microstrip Impedance Calculatorĭifferential Microstrip Impedance From Zo Calculator Mitered bends are used to compensate for the impedanceĭiscontinuity of the bend. Note: Calculations assume zero coil resistance SI and SGS Magnetic Units Mutual and Leakage Inductance L1 (Inductance, uH) = Transmission lines having differing values of Zo all behave the same. As the reflection coefficient gamma is also a dimensionless number this has the added advantage of simplifying the mathematics and making the understanding easier. Rdc (DC Resistance, copper, no leads, mOhm) = The SMITH chart is a graphical calculator that allows the relatively complicated mathematical calculations. If you have any suggestions for improvement please email This email address is being protected from spambots. These calculators are used by Mantaro engineers and provided freely for your use.