RF transceiver front-end

摘要

An RF transceiver front-end includes receiver and transmitter front-ends. The receiver front-end includes 1^st and 2^nd antennas, a ninety degree phase shift module and an LNA module. The 1^st and 2^nd antennas receive inbound RF signals and provide a first directional circular polarization. The ninety degree phase shift module phase shifts the RF signals received by the 2^nd antenna. The LNA module amplifies the RF signals received by the 1^st antenna and the shifted RF signals. The transmitter front-end includes a PA module and 3^rd and 4^th antennas, which provide a second directional circular polarization. The PA module amplifies outbound RF signals to produce amplified outbound RF signals and amplified orthogonal outbound RF signals. The 3^rd antenna transmits the amplified outbound RF signals and the 4^th antenna transmits the amplified orthogonal outbound RF signals.