(under subclass 837) Subject matter wherein a first reflector is positioned behind an active antenna and a second reflector (screen reflector) is positioned in front of the antenna, the second reflector redirecting diverging rays emanating from the active antenna in transmission, and shielding the active antenna in reception from undesired energy when coming from a direction other than that of the desired received energy.
(1) Note. Usually the subject matter in this subclass includes a parabolic reflector with a transmitting active antenna at its focus and a screening reflector on the side of the transmitting antennas opposite from the parabolic reflector. The screening reflector directs the diverging energy radiated from the source towards the parabolic reflector, which redirects this energy in a parallel path.
(2) Note. The second reflector (screen reflector) referred to in the definition above is not a director. See subclass 833 above for antennas with directors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
840, for active antennas with parabolic reflectors.
