A novel miniaturized polarization orthogonalizing active retrodirective antenna array for satellite use

In this work, we propose an active retrodirective antenna (RDA) array with polarization orthogonalizing features that uses only single antenna to transmit and receive in unit element. Hence this arrangement substantially reduces the size of the RDA and makes it feasible to be further implemented into a 2D array. The RDA array is able to retransmit the signal to the interrogator location with the signal that is orthogonally polarized to the interrogating signal. Furthermore, the proposed RDA is designed to be operated at 7.1GHz and 8.4GHz for the uplink and downlink of the satellite use, respectively.