Log Periodic Dipole Array Antenna (LPDA Antenna) is a directional antenna used to transmit and receive electromagnetic waves in the radio frequency spectrum.

This antenna is commonly used for point-to-point communications, point-to-multi-point communications, and broadcasting applications. In order to produce a beam of radio waves in one direction, the antenna has multiple radiating elements that are mounted at different angles from a central feed element called a boom or mast. The dipoles are aligned along the length of the boom and they each have a matching network that connects them to the feed line at their base. This network is typically coaxial cable whereas some antennas use waveguide instead.