What type of antenna is used to receive and display information in a unidirectional setup?

In a unidirectional setup, the requirement is to receive and display information from a specific direction rather than from all around. The unidirectional antenna is specifically designed to focus its reception in a single direction, which enhances the signal quality from that desired source while minimizing interference from other directions. This makes it particularly useful in applications where the source of the signal is known and is located in one area, such as in point-to-point communication systems or in scenarios where the positioning of the antenna allows it to effectively gather signals without the distractions of surrounding noise.

In contrast, omnidirectional antennas collect signals from all directions, which doesn’t suit the requirement of a unidirectional setup. The term "coded reply antenna" is not standard in reference to directional characteristics, and while a directional antenna could imply a similar function, it may not specifically denote the same singular focus implied by a unidirectional antenna. Therefore, the unidirectional antenna is the most precise choice for receiving and displaying information in a setup that requires focusing on a specific signal direction.