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)
“It can be demonstrated that the child’s contact with the real world is strengthened by his periodic excursions into fantasy. It becomes easier to tolerate the frustrations of the real world and to accede to the demands of reality if one can restore himself at intervals in a world where the deepest wishes can achieve imaginary gratification.”
—Selma H. Fraiberg (20th century)