Explain the term "antenna gain."

Antenna gain refers to an antenna's ability to focus energy in a specific direction rather than radiating it uniformly in all directions. This characteristic enhances the effective transmission and reception of signals, allowing for improved communication performance. Higher gain antennas direct more of the emitted radio frequency energy towards a targeted area, which can lead to stronger signals and improved coverage within that region.

The concept of gain is particularly important in telecommunications, as it directly affects signal quality and range. By focusing energy, a high-gain antenna can achieve greater distance and better reception for the same amount of input power compared to a standard, low-gain antenna. Thus, understanding antenna gain is crucial for optimizing the performance of communication systems.

The other options do touch on concepts related to antennas, but they do not accurately define antenna gain. The increase in height of an antenna does not necessarily correlate with gain, as gain is more closely related to the design and orientation of the antenna. The amount of power transmitted to the antenna is related to its power handling and characteristics, but it doesn’t define gain itself. Lastly, the reduction of signal interference is important for communication quality, but it does not directly relate to the concept of antenna gain.