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Open circuited stubs are not preferred as it will radiate power like an antenna, which is undesirable. Shunt stubs enable modification with ease. Smith chart reflection coefficient calculator series#The best stub selection for the transmission line will beĬlarification: Normally series stubs are not preferred as modification of the stub parameters requires changing the whole stub setup. On substituting for r = 1, we get R = 1/1 + 1 = ½ = 0.5.ĩ. The radius of the point having a normalised resistance of 1 ohm isĬlarification: The radius of the point with a radius r is given by R = 1/r+1. Given that the load impedance is 30 ohm, the normalised load impedance of the 50 ohm transmission line is 30/50 = 3/5 ohm.Ĩ. The normalised load impedance of the transmission line 50 ohm with a load of 30 ohm isĬlarification: The normalised impedance is calculated by dividing the impedance with the characteristic impedance. The centre of the point having a normalised resistance of 1.2 ohm and reactance of 1.5 ohm isĬlarification: The centre of a point in Smith chart is given by C = (r/1+r, 0). ![]() This is used to calculate the normalised load impedance.Ħ. Moving towards the clockwise direction in the Smith chart implies movingĬlarification: On moving towards the clockwise direction in the Smith chart, we are traversing towards the generator. Smith chart reflection coefficient calculator generator#If the line length is, for example, l m long, the generator is then at z-l m, and the load at z0. The resistance is unity and reactance is zero at this point.ĥ. It is important to remember that we defined points between the generator and the load as the negative z-axis. The circles in the Smith chart pass through which point?Ĭlarification: All the constant resistance and reactance circles in the Smith chart pass through the (1,0) point. Also stub matching can be done using the Smith chart.Ĥ. The impedances are plotted using these circles. State true/false.Ĭlarification: The Smith chart is used for calculating the reflection coefficient and standing wave ratio for normalised load impedance of a transmission line.Ĭlarification: The Smith chart consists of the constant resistance circles and the constant reactance circles. The Smith chart is graphical technique used in the scenario of transmission lines. It is the polar chart of the reflection coefficient R with respect to the normalised impedance Znorm.Ģ. The Smith chart is a polar chart which plotsĬlarification: The Smith chart is a frequency domain plot. ![]() Electromagnetic Theory Assessment Questions and Answers on “Smith Chart”.ġ. ![]()
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