| 单词 |
parabolic antenna |
| 释义 |
parabolic antenna
parabolic antennan. An antenna that receives or sends electromagnetic signals such as radio waves or microwaves by using a parabolic mirror to focus incoming radiation onto one reception point or to direct the emissions of radiation from a focal source point into a beam. Also called dish antenna.
parabolic antenna
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 antennaA 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. |
MedicalSeeDBS |
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