PURPOSE: To shorten the eclipse loss time of a semiactive radar receiver by providing a receiver means for supplying continuous waves of a first signal and a pulse, radar, and a range gate generator means for supplying a timing signal.

CONSTITUTION: A bistatic receiver 10 receives a direct radar signal of information following a data link and supplies a radar timing signal to a radar seeker 11. The seeker 11 uses the information so as to generate such a range gate that the reflecting signal of its own radar received by the seeker 11 itself can fall within the range. The radar timing signal supplied from the receiver 10 is also used for supplying a planking signal for the receiver 10. Therefore, the eclipse loss time of the receiver 10 can be shortened by generating appropriate timing.