A new adaptive harmonic jammer canceler is proposed. It is based on the use of two sensors that enable an adaptive generation of a reference signal that is uncorrelated with the desired signal. This reference signal is used for the reconstruction of the desired signal by an adaptive substraction method.This canceler is well suited to radio communications. A theoretical analysis of the convregence of the coupled algorithms is presented with the help the associated ordinary differential equation introduced by L. Ljung. Numerical simulations illistrate the diffrent proposed algorithms.