A 50 ohmns lossless air transmission line is terminated in a load impedance ZL =

Question

A 50 ohmns lossless air transmission line is terminated in a load impedance ZL = 12.5 + j20 ohnms

. Find the following using a Smith Chart:

i) the load admittance YL.

ii) the closest distance to the load plane where the normalized admittance on the line is 1 + jbN.

iii) the length of a short-circuited stub of characteristic impedance Z (OS) =100 ohmns which, upon placement in shunt with the line at the 1 + jbn admittance point, produces impedance matching on the line so that there exists no reflected wave to the left of the short-circuit placement plane.

Do only 2 and 3

Explanation / Answer

closest distance=750 m

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