SWR circles are also provided for the sake of illustration. 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. 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), The Smith Chart graphically maps S11reflection coefficient(ZL-Z0)/(ZL+Z0) to Load Impedance (ZL), normalized to Z0 (source impedance center of chart). 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) = %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) = Tpd (unloaded propagation delay, ps/unit len) = Inch Zo (unloaded trace impedance, Ohms) = 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 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) = Rdc (DC Resistance, copper, no leads, mOhm) = The procedure for this is as follows: - Determine the impedance as a spot on the Smith Chart - Find the reflection coefficient (Gamma) for the impedance. up conversions between SWR, return loss, and reflection coefficient. If you have any suggestions for improvement please email This email address is being protected from spambots. Knowing the reflection coefficient, find the two circles intersecting at that point and read the corresponding values r and x on the circles. Learn how to use the Smith Chart matching software on RFMentor in less than 10. These calculators are used by Mantaro engineers and provided freely for your use.
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