feed horn


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feed horn

[′fēd ‚hȯrn]
(electromagnetism)
A device located at the focus of a receiving paraboloidal antenna that acts as a receiver of radio waves which the antenna collects, focuses, and couples to transmission lines to the amplifier.
References in periodicals archive ?
As the bolt reciprocates, the curved belt feed lever, positioned between two studs on the top of the bolt carrier at the rear, oscillates across the gun and, as a consequence of an intermediate lever above it at the front end, moves the feed pawl slide out for the feed pawl to grab a round and then subsequently inward to bring the round up to the stop pawls and position it for the bolt's feed horn to drive it out of the belt and into the chamber.
Since the feed horn is quite a good termination, with a return loss better than 30 dB over the whole band, the scattering parameter measurements directly read on the instrument are a quite accurate estimate of the return loss at the OMT rectangular ports (corresponding to the through port and the recombined side ports of the dual junction) and of the isolation between them.
The monopulse focal plane feed horn array for a plasma mirror based antenna system may be a 4-, 5-, 12- or 44-horn array or some other optimized feed array set.
some antenna designs mount the feed horn behind the reflector.
The new edition includes a modest amount of new material in some chapters and a more substantial amount on feed horn design and the construction of parabolic reflectors.
This type of BFN does not allow pattern shaping other than that which is provided by the fixed feed horn design.
Phase commands in the form of row and column start and stop pulses, convert the spherical wavefront from the feed horn into the required plane phase front.
For simplicity, the near-field distribution of radiation aperture of the feed horn is extracted and discretized into squares of 0.
However, the reflector and feed horn together present a considerable thickness.
The total cross-sectional area (shadowing the antenna) is less than 100 square inches, which allows the unit to be mounted directly behind the feed horn.
An offset antenna was designed with a presurre-compensating corrugated feed horn to meet this criterion.
Consider a feed horn with an aperture A of 15 mm at 100 GHz (wavelength [Lambda] = 3 mm).