Working together, they can alter any portion of the surface to form a real-time paraboloidal reflector
with an effective diameter of 300 m.
The reason for choosing this range for a is that (1) for a conventional Cassegrain antenna, the focus of the hyperboloidal reflector has to be coincide with that of the paraboloidal reflector
, which requires that the vertex of the hyperboloidal reflector lays between the two foci of the hyperboloidal reflector (a < 1); and (2) The vertexes of the two branch of the hyperboloidal reflector have to be separate with each other (0.
New IRA is designed using asymptotic conical dipole (ACD) as feeding TEM line and 46 cm paraboloidal reflector
The paraboloidal reflector has been commonly used as an optical focusing device in the IRAs .
In this section, a knife-shape TEM horn , which exhibits good performance from 120 MHz to 1250 MHz, is applied to feed a paraboloidal reflector.
Faryad, "Fields around the focal region of a paraboloidal reflector
placed in isotropic chiral medium," Progress In Electromagnetics Research B, Vol.
Focusing from a large size paraboloidal reflector, composed of two layers of chiral and/or chiral nihility metamaterials, is studied by utilizing the Maslov's method to give the remedy of GO which fails at caustic.
Focusing of electromagnetic waves from a paraboloidal reflector composed of chiral and/or chiral nihility metamaterial using the Maslov's method is studied in next section.
When both RCP and LCP waves are incident on the main paraboloidal reflector
, it cause four reflected waves designated as LL, RR, LR and RL .
Above center is the huge paraboloidal reflector
, its interior partly covered with reflecting material.
Zhen Cheng and Xin-Fa Jiang, Beijing Institute of Radio Measurement presented their paper, "Exact Analysis and Experiment of Coaxial Feeds," in which they derived an exact mathematical model for the feed of small paraboloidal reflector
antennas, and verified their computed data by comparing them with experimental results.
For large angle scanning, even paraboloidal reflectors
with large F/D ratios fail to generate high quality beams.