This is in ideal condition, but how good is the rejection of other signals by the beamforming circuits in the receiver? Intuitively, I'd think that a powerful e

This is in ideal condition, but how good is the rejection of other signals by the beamforming circuits in the receiver? Intuitively, I'd think that a powerful enough local jammer (I really mean local, not at some kilometers, EM fields weaken with the square of distance, so very quickly) would manage to create interferences despite the beamforming.