| 摘要 |
PURPOSE:To eliminate an interference wave when a transmission/reception common antenna is used by extracting a part of a transmission signal from a transmitter being an interference source and adding it to a reception signal at the same level and in an opposite phase to use a vertical polarized wave and a horizontal polarized wave. CONSTITUTION:A coupler 14 at a transmitter side extracts a part of a transmission signal from a transmitter 1 being an interference source and the extracted signal is outputted to a phase device 16 and an attenuator 17. The phase device 16 and the attenuator 17 process the signal to be the same level and opposite phase to a transmission signal bypassed to a receiver 4 and the result is added to the reception signal by a receiver coupler 15. Thus, a vertical polarized wave and a horizontal polarized wave are used to block the interference to an adjacent frequency reception wave by bypassed signal from an antenna of a transmission wave generated when a transmission and reception common use antenna 13 is used. |
