A novel multi beam adaptive antenna is constructed by means of Fresnel zone phasecorrecting focusing configuration and feeding array. The statistical characteristic of feeding array output and the ability for resolving coherent signals of this new adaptive antenna are analyzed by comparison with that of the uniform spaced linear array using spatial smoothing techniques for coherent signal identification. Then, the maximum likelihood function approach is exploited to perform the efficient eatimation in the direction of arrival(DOA) under wide angle multiple coherent signals incident, and to avoid the problems of the inherent field of view coming form MUSIC algorithm for bearing estimations. The result of simulation shown the good spatial spectrum estimation performance of the FZP antenna.