What is the nominal characteristic impedance of “window line” transmission line?
50 ohms
75 ohms
100 ohms
450 ohms✓الإجابة الصحيحة
الشرح
Window line is the flat ladder-line style feeder with rectangular cutouts in its insulation, manufactured to a nominal 450 ohms. The 50 and 75 ohm figures belong to coaxial cable, not to parallel line.