For problems 11 and 12 –
A material with Er = 2.25 is used as the insulating material in a lossless coaxial line with characteristic impedance of 50 Q. – The radius of the inner conductor is 1.2 mm.
11.What is the radius of the outer conductor in mm?
12.What is the phase velocity of the line
13.A copper wire with circular cross-section and lmm radius is 120 meters long. Find the AC resistance of this wire at 100
14.MHz. Copper has a conductivity of o– = 5.8 x 10
2 Answers