Log-Periodic Antenna

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log-periodic antenna

[′läg ‚pir·ē¦ad·ik an′ten·ə]
(electromagnetism)
A broad-band antenna which consists of a sheet of metal with two wedge-shaped cutouts, each with teeth cut into its radii along circular arcs; characteristics are repeated at a number of frequencies that are equally spaced on a logarithmic scale.

Log-Periodic Antenna

 

a type of a frequency-independent antenna with periodic repetition of the ratios of the characteristic dimensions of the adjoining components. The repetition obeys a logarithmic law in such a way that the ratio between the wavelength of the electromagnetic oscillations being radiated and the characteristic dimensions of the excited part of the antenna remains virtually constant over a wide frequency range.

References in periodicals archive ?
Reconfiguration of Vivaldi and log periodic antennas," Proc.
Log periodic antennas can be purchased at ham radio supply stores.
A heavy-duty, non-conductive support and positioner is available for high gain, log periodic antennas.
The log periodic antennas are common examples of this category.
While even large log periodic antennas have a drop of sensitivity at the lower end of the spectrum, the CTS011 provides good sensitivity at this range.