Length
Whip antennas are normally designed as resonant antennas. Therefore the length of the whip antenna is determined by the wavelength of the radio waves used. The most common length is one-quarter of the wavelength, called a quarter-wave whip (although this type of antenna is often shortened by the use of a loading coil; see Electrically short whips below). For example, the common quarter-wave whip antennas used on FM radios in the USA are approximately 75 cm long, which is roughly one-quarter the length of radio waves in the FM radio band, which are 2.78 to 3.41 meters long. Half-wave whip antennas are also common.
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Famous quotes containing the word length:
“Baltimore lay very near the immense protein factory of Chesapeake Bay, and out of the bay it ate divinely. I well recall the time when prime hard crabs of the channel species, blue in color, at least eight inches in length along the shell, and with snow-white meat almost as firm as soap, were hawked in Hollins Street of Summer mornings at ten cents a dozen.”
—H.L. (Henry Lewis)
“At length upon the lone Chorasmian shore
He paused, a wide and melancholy waste
Of putrid marshes.”
—Percy Bysshe Shelley (1792–1822)
“Whoever aims publicly at great things and at length perceives secretly that he is too weak to achieve them, has usually also insufficient strength to renounce his aims publicly, and then inevitably becomes a hypocrite.”
—Friedrich Nietzsche (1844–1900)