 
 <prompt> Wetin you dey look for to find value? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```Antennas get different performance measures wey pesin fit dey reason about wen e wan select or design antenna for one particular use. The main ones dey relate to the directional characteristics (as shown for the antenna's radiation pattern) and the gain wey dey come out from am. Even for antennas wey dey omnidirectional (or weakly directional), the gain fit still increase if more power dey focused for the horizontal directions, even if e mean say power wey dey radiate go sky and ground go reduce. The antenna's power gain (or simply "gain") also dey consider the antenna's efficiency, and e dey often the main figure wey dem dey look out for.``` 