Input impedence in the open circuit transmission line

It's the value of 'l' that appears in the argument of tangent function.

When we move along the transmission line the value of 'l' keeps on increasing or decreasing (depending upon the reference taken) and so the value of tangent function may be positive or negative.

This periodic change in the sign of tangent function value is the sole reason for periodic capacitive and inductive nature of the transmission line, as one moves along the line.

Thank you.

proffyIt's the value of 'l' that appears in the argument of tangent function.

When we move along the transmission line the value of 'l' keeps on increasing or decreasing (depending upon the reference taken) and so the value of tangent function may be positive or negative.

This periodic change in the sign of tangent function value is the sole reason for periodic capacitive and inductive nature of the transmission line, as one moves along the line.

Thank you.

k..i think here length is an increasing one..then here what decides the periodic change...i'm not clear enough plz help..