AbstractThis paper proposes an interference cancellation method called the in‐band power minimizing method (IPMM), and describes the use of the method in satellite communication earth stations. In this method, an interfering signal arriving from an earth station antenna is combined by a cancellation circuit with an interfering signal received by an auxiliary antenna and the two interfering signals are arranged to have equal amplitudes but opposite phase. To achieve this condition, the amplitude and phase are adjusted so that the signal power of the output signal from the cancellation circuit contained in the desired signal frequency band is to be a minimum. This method is characterized by the fact that a simple circuit can be used to detect interference rapidly and accurately even at lowC/Nratios.This paper also discusses the principle of IPMM and examines the results obtained when it is applied to small earth stations. It was found that IPMM is quite effective in this applicatio