Retro-directional antenna for receiving a received signal from one receiving direction and for sending out a transmitted signal in the opposite direction to the receiving direction

摘要

The retro-directional antenna (10) for receiving a received signal from a receiving direction and for transmitting a transmission signal in the opposite direction to the receiving direction is provided with a parabolic reflector (12) which defines a focal area (14) within which the focus or the focal plane of the Reflector (12) is located, and in the focal area (14) of the reflector (12) arranged array (16) of antenna elements (P1, P2, P3, P4, P5). The retro-directional antenna (10) also has a detector (18) for determining the power of partial signals that the antenna elements (P1, P2, P3, P4, P5) receive when a received signal is present, and for determining the distribution of the partial signal powers among the antenna elements (P1, P2, P3, P4, P5) and a transmission signal generation unit (20) for generating a transmission signal as a set of transmission sub-signals to be emitted by the antenna elements (P1, P2, P3, P4, P5). The distribution of the transmitted partial signal powers among the antenna elements (P1, P2, P3, P4, P5) is essentially equal to or proportional to the distribution of the received partial signal powers.