
aerial
aerial (âr´ê-el,
â-îr´ê-el) adjective
1. Of, in, or caused by
the air.
2. Living in the air.
3. Reaching high into the
air; lofty.
4. Suggestive of air, as
in lightness; airy.
5. Unsubstantial; imaginary.
6. Of, for, or by means
of aircraft: aerial photography.
7. Botany. Growing or borne
above the ground or
water:
aerial roots.
noun (âr´ê-el)
ANTENNA.
[From Latin âerius,
from Greek aerios, from aêr, air.]
antenna
antenna
or aerial (âr´ê-el), system of
wires
or other conductors used to transmit or receive radio or other electromagnetic
waves
( RADIO; TELEVISION). In a transmitting antenna, the signal from an
ELECTRIC
CIRCUIT causes electrons in the antenna to
oscillate;
these moving electric charges generate
ELECTROMAGNETIC
RADIATION, which is then transmitted through space. The distribution pattern
of the transmitted wave depends on the design of the antenna; radio broadcast-station
antennas are frequently designed to emit waves in all directions, whereas those
used for RADAR and for certain communication systems
focus
the
waves
in a single direction. In a receiving antenna, electromagnetic waves cause the
electrons in the antenna to oscillate, inducing a signal that can be detected
by an electric circuit. In general, a longer antenna is used to transmit or
receive signals of longer wavelengths. Theoretically, the same antenna can be
used both for sending and for receiving signals, but in practice, transmitting
antennas are constructed to handle higher power loads than receiving antennas.
Phased array antennas, used for long-range radar and radio astronomy, are composed
of large groupings of individual antennas that are aimed electronically by changing
the relative phase of the signal at each antenna.
AERIAL
Above ground installation for power
lines or
telephone
lines or cables are installed on a pole or overhead structure.
release _Warm Leatherette MP3
/T.V.O.D._
MP3
7"
on Mute 001 (1978)
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release _Self Inflicted Aerial Nostalgia_ 12" (limited 500) by Guided By Voices on Halo (1989)
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