parabolic reflector

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parabolic reflector

[¦par·ə¦bäl·ik ri′flek·tər]
(electromagnetism)
An antenna having a concave surface which is generated either by translating a parabola perpendicular to the plane in which it lies (in a cylindrical parabolic reflector), or rotating it about its axis of symmetry (in a paraboloidal reflector). Also known as dish.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

parabolic reflector

A light reflector whose surface is a paraboloid, i.e., a surface generated by rotating a parabolic section about its axis; if a small light source is placed at the focal point of the reflector, the reflected light will be concentrated in a nearly collimated beam parallel to the axis of the reflector.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Caption: Figure 4: Schematic diagram of the frame allowing the orientation control of the parabolic reflectors along the altitude.
Generally, the reflectarray transforms the spherical wave emanating from the feed into a plane wave at the output, like conventional parabolic reflector antenna.
In a workshop located over the rubble of what used to be the local train station, my attention was drawn to a huge parabolic reflector with a boiling teapot perched on top.
Two-dimensional (2-D) radars for both military and civil systems use parabolic reflectors at L-band and above, or with arrays of dipole or Yagi elements in the VHF and UHF bands (see Figure 1).
The Radround tunnel uses clamshell-opening heater modules that contain 12 to 18 quartz lamps with individual parabolic reflectors and measure 16 x 44.5 in.
This horn is a promising candidate as a feed for parabolic reflectors. Therefore, the horn is analyzed as a feed for the parabolic reflector.
The lighting components used on this project (pendent fixtures with parabolic reflectors, the choice of high-color rendition lamps with tri-phosphors, electronic ballasts, occupancy sensors) reduce energy consumption by 79 percent and generate a 75-percent saving in utility costs.
Socket attachments were added to control the two remaining lamps, and the outer tubes were relocated to the socket attachments--exactly in line with the parabolic reflectors, which maximize the light output and produce uniform lighting levels.
Parabolic reflectors were considered for the installation, but rejected.
Garduno Nolasco, "A new proposal to convertnear-field into far-field for parabolic reflectors," Microwave and Optical Technology Letters, vol.
On the other hand, parabolic reflectors meet with the requirement but have non-planar curved reflector surface that makes it bulky and increases fabrication complexity.