A coaxial line is filled with a very slightly lossy material with a relative dielectric constant of 5
The line would have a characteristic impedance of 100 ohm if it was air-filled.
(a) What is the characteristic impedance of the dielectric-filled line?
(b) What is the propagation constant at 500 MHz? Use the fact that the velocity of an
EM wave in a lossless air-filled line is the same as that of free-space propagation in air. That is, the propagation constant is the same.
(c) What is the input·impedance of the line if it has an electrical length of 90° and it is terminated in a 35 ohm resistor?
(d) What is the input impedance of the line if it has an electrical length of 180° and is terminated in an inductor of impedance j35 ohm?
(e) What is the input impedance of the line if it is l km long? Use reasonable approximations,remembering that the line is slightly lossy.