2 results about "Antenna feed" patented technology

Compared with a traditional FDD system measurement and control station, an uplink and downlink common-frequency aerospace ground measurement and control station disclosed by the invention has higher measurement and control spectrum efficiency and higher measurement precision. A first-stage interference suppression module is formed by four channels, and a second-stage interference suppression module formed by a sum channel, an azimuth difference channel and a pitch difference channel is arranged between a down-conversion module and a measurement and control baseband module; a time delay estimation module based on a spreading code is added in a second-stage interference suppression module so as to improve the synchronization precision between an interference reconstruction signal and a receiving signal; the antenna feed source adopts a transmitting and receiving feed source split antenna in which a transmitting feed source and a receiving feed source are separated, so that the isolation degree between transmitting and receiving signals is increased; a receiving and transmitting common-local-oscillator scheme is adopted, a unified local oscillator signal is distributed to the up-conversion module and the down-conversion module, it is guaranteed that reference signals and received self-interference have the same phase noise distribution, the self-interference cancellation efficiency is improved, and the technical difficulty of uplink and downlink common-frequency self-interference suppression is reduced.