Log Periodic Antennas and Fractals
The first fractal "antennas" were, in fact, fractal "arrays", with fractal arrangements of antenna elements, and not recognized initially as having self-similarity as their attribute. Log-periodic antennas are arrays, around since the 1950s (invented by Isbell and DuHamel), that are such fractal arrays. They are a common form used in TV antennas, and are arrow-head in shape.
Read more about this topic: Fractal Antenna
Famous quotes containing the words log and/or periodic:
“The Indians invited us to lodge with them, but my companion inclined to go to the log camp on the carry. This camp was close and dirty, and had an ill smell, and I preferred to accept the Indians’ offer, if we did not make a camp for ourselves; for, though they were dirty, too, they were more in the open air, and were much more agreeable, and even refined company, than the lumberers.... So we went to the Indians’ camp or wigwam.”
—Henry David Thoreau (1817–1862)
“But parents can be understanding and accept the more difficult stages as necessary times of growth for the child. Parents can appreciate the fact that these phases are not easy for the child to live through either; rapid growth times are hard on a child. Perhaps it’s a small comfort to know that the harder-to-live-with stages do alternate with the calmer times,so parents can count on getting periodic breaks.”
—Saf Lerman (20th century)