INTERFERENCE WAVE CANCELLING DEVICE

摘要

PURPOSE: An interference wave cancelling device is provided to enable users to successfully cancel interference wave in an area other than pinpoint. CONSTITUTION: An interference wave cancelling device includes the following components. A phase flat intermediate frequency narrowband band-pass filter(20B) includes two signal passes, namely a main signal pass(38) and a delay pass(40). A main signal pass(38) is equipped with a broadband band-pass filter(42). A delay pass(40) is equipped with a narrowband band-pass filter(44). An attenuator(46) which attenuates the signals. A phase shifter(48) which is set the amount of phase shift in order to shift the signals that has passed the main signals pass(38) into antiphase signals in the delay pass(40). A two-way hybrid(50) which distributes the signals from MIX(18) to the main signal pass(38) and the delay pass(40) in the same phase and the same amplitude. A two-way hybrid(52) combines the signals which have passed the main signals pass(38) and the delay pass(40) in the same phase and the same amplitude and provides the signals to the MIX(22).