Which of the following best describes a semidirectional antenna's typical application?

• A. Broad indoor coverage in all directions.
• B. Vertical downlinks only.
• C. Point-to-point links between buildings.
• D. Satellite uplinks.

Answer: (C)

Semidirectional antennas are used when you want to concentrate the wireless signal into a specific direction while still covering a sector rather than all around. This provides more gain than an omnidirectional antenna but isn’t as narrow or precise as a dish.

That makes them ideal for establishing a point-to-point link between buildings: you mount one on each building, aim them at each other, and create a dedicated connection with better signal quality and less interference from other directions. In contrast, broad indoor coverage uses an omnidirectional pattern to spread the signal everywhere inside a space, vertical downlinks imply a focus straight downward, and satellite uplinks rely on highly directional parabolic dishes aimed at a satellite.