Advanced Qualification · A-007 Feedlines and matching · A-007-006-002
As standing wave ratio rises, so does the loss in the transmission line. This is caused by:
- A high antenna currents
- B high antenna voltage
- C leakage to ground through the dielectric
- D dielectric and conductor heat losses
Correct answer: D — dielectric and conductor heat losses. From the official ISED question bank, verified word for word.
Why
When the standing wave ratio rises, energy bounces back and forth along the feedline instead of reaching the antenna, forcing the signal to travel a longer effective distance. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.