parabolic antenna


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parabolic antenna

[¦par·ə¦bäl·ik an′ten·ə]
(electromagnetism)
Antenna with a radiating element and a parabolic reflector that concentrates the radiated power into a beam.

parabolic antenna

A bowl-shaped antenna that reflects and focuses incoming radio waves into a narrow beam directed toward a receiver typically positioned above the center of the unit. Also called a "dish" or "mirror," parabolic antennas are used for satellite signals and planetary telescopes. The reflective mirror design can also emit energy such as in a flashlight or automobile headlight. See DBS.


Dish Antennas
Parabolic antennas are easily recognized by their bowl shape.
References in periodicals archive ?
De Villa told stories of parties honoring patron saints of Guatemalan hamlets that drew thousands of immigrants in Los Angeles; of an illiterate Mayan woman seated in front of a TV and VCR her son brought from the United States, watching a video of him in California; of parabolic antennas and cable TV in tiny highland communities; of a woman whose son sent her so many appliances, they did not fit in her tiny, rural shack; of a community of 5,000 inhabitants of a tiny highland town called Salcaja living outside of Chicago; of a Mayah family living in Canada that speaks two languages -- English and K'iche.
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However, an array of parabolic antennas is also limited by the field observable by the individual telescopes.
monitor the sun's radio emissions with a radio telescope that uses three parabolic antennas of 28 feet, 8 feet and 3 feet in diameter, along with fixed semi-bicone and tracking antennas.
The wireless network uses parabolic antennas to extend to a central location, from which additional antennas reach out to rural areas at the furthest ends of the county.
Many homes outside the cable area have parabolic antennas to receive television transmissions from a satellite far out in space.
PCTEL provides parabolic antennas, ruggedized antennas, Yagi antennas, military antennas, precision aviation antennas and other high performance antennas for many applications.
As it is purpose-built for use in newly "densified" city environments where conventional microwave and typical 70-80GHz radios cannot be installed because of large, highly visible parabolic antennas, the WTM 3300 redefines the urban backhaul market.