        AN-SOF ANTENNA SIMULATOR
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Frequency sweep simulation of a lossless transmission line.

The transmission line is made of one horizontal conductor above a perfect ground plane. A voltage source is placed at one line end and the other end is short-circuited against ground.

By plotting the input impedance as a function of frequency the resonance frequencies can be obtained (imaginary part of input impedance goes to zero). The current distribution along the line can also be plotted to see the accuracy of the calculation compared to transmission line theory.