Which of the following can be calculated using a Smith chart?
Impedance along transmission lines✓پاسخ درست
Radiation resistance
Antenna radiation pattern
Radio propagation
توضیح
A Smith chart is a plot of the complex reflected-to-incident wave ratio with impedance coordinates drawn on top of it, and rotating around its center corresponds to moving along a transmission line. That makes it a graphical calculator for impedance at any point along a line, which is nothing to do with radiation patterns or propagation.