Antenna coupler

摘要

An antenna coupler is inserted between an antenna and communication systems operating in two different frequency bands. A matching circuit allows signals in either of these frequency bands to be transmitted only between the antenna and a sorter corresponding to the frequency band which serves to sort signals in the frequency band into a reception band and a transmission band. Reception and transmission filters corresponding to the two frequency bands are provided for limiting reception signals received from the antenna and transmission signals from the communication systems within a reception band or a transmission band in the corresponding frequency band.