Directional antenna
（重定向自High Gain Antenna）
![A multi-element, log-periodic dipole arrayA 70-meter Cassegrain radio antenna at GDSCC, California](/Images/godic/202501/18/LPDA-large5326.jpg")
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A directional antenna or beam antenna is an antenna which radiates or receives greater power in specific directions allowing for increased performance and reduced interference from unwanted sources. Directional antennas provide increased performance over dipole antennas – or omnidirectional antennas in general – when a greater concentration of radiation in a certain direction is desired.