How can increasing antenna height affect radio wave signal?

• A. It can decrease signal strength
• B. It can enhance signal strength and coverage
• C. It has no impact on signal quality
• D. It solely improves data speed

Answer: (B)

Increasing the height of an antenna generally enhances signal strength and coverage due to several key factors related to radio wave propagation. When an antenna is elevated, it can transmit and receive signals over a larger area, as higher position allows signals to travel further before encountering obstructions such as buildings, trees, or terrain.

This elevation also minimizes the effects of multipath interference, which occurs when signals bounce off surfaces and arrive at the receiver at different times, causing distortion. With higher antennas, the line of sight between the transmitting and receiving stations improves, leading to more efficient signal transmission with reduced loss.

Furthermore, elevated antennas are less likely to be shielded by obstacles, further expanding their effective communication range and improving the overall quality of the received signal. Therefore, increasing the antenna height is an effective method to maximize both coverage area and signal strength, which is why this option is correct.