Reflected energy from the environment follows the reverse path and is focused by the reflector onto the feed horn where it travels back to the receiver.
22.
Failures of the 9-foot hydrostatic bearing often caused the early closure of some sites due to catastrophic damage to the support tower, sail, and feed horn.
23.
Normally this is achieved by splitting the pulse into two parts and polarizing each one separately before sending it to a set of slightly off-axis feed horns.
24.
A 149 element feed horn array and four switching networks ( three were switchable in orbit ) allowed the zone coverage to be changed to match the orbital location.
25.
The paper acknowledges the hypothesis must be tested, including the detail that only one of the feed horns detected the signal which is an issue for any long-lived emission source.
26.
Conical scan systems send out a signal slightly to one side of the antenna's boresight, and then rotating the feed horn to make the lobe rotate around the boresight line.
27.
In parabolic antennas such as satellite dishes, a "'feed horn "'( or "'feedhorn "') is a small horn antenna used to convey radio waves between the transmitter and / or frequencies.
28.
The C model was aimed by sending the signal out of one of two slightly off-centre feed horns in the middle of the antenna, the signal being switched rapidly between the two horns.
29.
The observatory house complex, radiometer building, utility buildings, University of Toronto Laboratory, dish and parabolic microwave feed horn instruments were designed in 1959 and construction was completed in phases over the next several years.
30.
As the feed horn in the rotated process spins, the polarization changes with the rotation and will thus be 90 degrees off in polarization when the feed is 90 degrees off its initial axis.
