Amateur Extra › E9 Antennas and Transmission Lines › E9C14
E9C14
How does the radiation pattern of a horizontally-polarized antenna mounted above a long slope compare with the same antenna mounted above flat ground?
Pick an answer to check it.
Answer: B. The main lobe takeoff angle decreases in the downhill direction
A slope tilts the effective ground plane. In the downhill direction the main lobe's takeoff angle is lower than over flat ground.
Tip: Downhill, lower takeoff angle.