parabolic antenna


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parabolic antenna

n.
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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
The radome that protects the parabolic antenna from bird strikes and makes it more aerodynamic has to be part of the structure of the aircraft.
An antenna with the aforementioned parameters would be able to receive data from a LEO satellite orbiting at the altitude of roughly 500 km and equipped with a parabolic antenna with 40 cm diameter and 50 W transmit power with an average data rate of 32 Mbps in the case without overlapping and 68 Mbps in the case of digital beamforming.
This receiver is not required to have the specifications to accurately measure the temperature of hot bodies identified by the beam of its parabolic antenna. A receiver for such a task would take the more prestigious aspect of a radiometer designed according to the criteria of high stability ([10.sup.-3] ...
The facility consists of 66 antennas arranged in a 18.5 km-diameter array, equivalent to the span of the Yamanote railway loop encircling the central part of Tokyo, and by processing millimeter/submillimeter wave(1) signals from each antenna, it is possible for the antennas to act as a single, giant telescope that can generate radio wave images with the same resolution as those produced by a massive 18.5 km-diameter parabolic antenna. This makes it possible to see the dark regions of the universe that cannot be observed at optical wavelengths, such as galaxies that were formed shortly after the beginning of the universe, the birth of stars, planetary systems like our solar system, and matter related to the origin of life, such as of organic molecules.
This motor-reducer is used in a rotational platform on which a parabolic antenna is installed; the motor-reducer must drive the platform in different angular positions, under imposed conditions of accuracy and stability.
GMSK modulation provides narrow-band (1 MHz at -60 dBc) operation at operating ranges up to 250 NM with the systems ground parabolic antenna system.
For maximum versatility, the 2-wire FMR250 is available in two compact versions: the horn antenna for level measurement in narrower applications and the parabolic antenna with 4[degrees] beam angle focusing for longer range measurement.
The four telescopes, each of which boasts a 20-meter-diameter parabolic antenna, will begin work in tandem by the end of this year to detect the waves, which travel at a frequency of 22 gigahertz.
A parabolic antenna of course, or otherwise translated as a satellite dish.
As shown in Figure 2, a parabolic antenna has a large main beam and smaller side lobes.
A parabolic antenna, UHF/VHF antennas and a radar were also installed.