Which antenna type radiates signals uniformly in all directions?

The antenna type that radiates signals uniformly in all directions is the omnidirectional antenna. This design allows it to transmit and receive signals equally well from all angles in a horizontal plane, making it ideal for applications where coverage in a 360-degree environment is needed. Omnidirectional antennas are commonly used in various broadcasting and communication applications, such as radio stations and mobile devices, where it is essential to maintain a consistent signal across all directions without requiring orientation adjustments.

In contrast, other types of antennas, such as directional and parabolic antennas, focus their signals in specific directions to achieve stronger reception and transmission in particular areas, which doesn't provide the same uniform coverage. A dipole antenna, while often used for various purposes, typically has a radiation pattern that is more focused than truly omnidirectional; it radiates best in a direction perpendicular to its length but does not provide the complete 360-degree coverage characteristic of an omnidirectional antenna.