Which of the following antennas is typically used in mobile devices for better reception?

The omnidirectional antenna is typically used in mobile devices for better reception due to its ability to receive signals from all directions equally. This characteristic makes it highly suitable for mobile communication, where the orientation and position of the device may frequently change. Users are often on the move, and an omnidirectional antenna can ensure consistent signal quality regardless of the device's orientation relative to the signal source.

In practical applications, mobile devices benefit from the omnidirectional antenna's compact size and the way it can effectively handle signals in urban environments where the signal source may be located in various positions around the user. Its design allows for a wide coverage area, making it ideal for maintaining connectivity as users move through different locations.

Other types of antennas, such as the patch antenna, parabolic antenna, and loop antenna, have specific use cases where either directionality or configuration limits their effectiveness for typical mobile communication scenarios. For instance, parabolic antennas are more suited for point-to-point communication due to their directional nature, which is not ideal in mobile contexts where users need flexibility.