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:
“‘T is wonderful how soon a piano gets into a log hut on the frontier. You would think they found it under a pine stump. With it comes a Latin grammar,—and one of those tow-head boys has written a hymn on Sunday. Now let colleges, now let senates take heed!”
—Ralph Waldo Emerson (1803–1882)
“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)