Which of the following is a source of loss in coaxial feed line?
Water intrusion into coaxial connectors
High SWR
Multiple connectors in the line
All these choices are correct✓الإجابة الصحيحة
الشرح
All three degrade the line: water in connectors increases attenuation and causes corrosion, a high SWR makes the reflected wave traverse the lossy cable repeatedly, and every connector adds a small insertion loss and a possible discontinuity. So the all-of-these answer is correct.