  We discuss the paramagnetic and Neel-ordered phases of the Kondo lattice
Hamiltonian on the 2D square lattice by means of bond Fermions. In the doped
case we find two antiferromagnetic solutions, the first one with small ordered
moment, heavy bands, and an antiferromagetically folded large Fermi surface -
i.e. including the localized spins - the second one with large ordered moment,
light bands and an antiferromagnetically folded conduction electron-only Fermi
surface. The zero temperature phase diagram as a function of Kondo coupling and
conduction electron density shows first and second order transition lines
between the three different phases and agrees qualitatively with previous
numerical studies. We compare to experiments on CeRh(1-x)Co(x)In(5) and find
qualitative agreement.
