QUESTION ON TRANSMISSION LINES Consider a 50mm long ideal transmission line with

Question

QUESTION ON TRANSMISSION LINES

Consider a 50mm long ideal transmission line with a capacitance per unit length of 400 fF/mm. What is the characteristic impedance of this line? Let's assume we drive this line with a step voltage of u(t) through a resistor of 1k ohm. What is the amplitude of the first voltage lunched in this transmission line. What is the time-of-flight (ToF) for this line? (ToF is the time it takes for the signal to reach the output for the first time). Assume the output is open circuit. Plot the output voltage vs. time for a time period of 4 ToF.

Explanation / Answer

A)Characteristic impedance Z0=Sqrt(L/C)

therefore Z0=Sqrt(50*10-3/(400*10-3))

=0.36ohm

B)Time period is required to find the amplitude

C) and D) are different from the subject

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