A log-periodic antenna (LP), also known as a log-periodic array or aerial, is a multi-element, directional, narrow-beam antenna[citation needed] that operates over a broad band of frequencies. This type of antenna is defined as having its structure prescribed by opening angles. A particular form of the log-periodic design, the log-periodic dipole array or LPDA, is often used in television antennas that work in the VHF band. (Wikipedia)
Deutsche Übersetzung: Logarithmisch-periodische Antenne