  The self-energy of the Dirac Brueckner-Hartree-Fock calculation in nuclear
matter is parametrized by introducing density-dependent coupling constants of
isoscalar mesons in the relativistic Hartree-Fock (RHF) approach where
isoscalar meson $\sigma$ , $\omega$ and isovector meson $\pi$, $\rho$
contributions are included. The RHF calculations with density dependent
coupling constants obtained in this way not only reproduce the nuclear matter
saturation properties , but also provide the self-energy with an appropriate
density dependence. The relativistic density dependent Hartree-Fock (RDHF)
approach contains the features of the relativistic G matrix and in the meantime
simplifies the calculation. The ground state properties of spherical nuclei
calculated in the RDHF are in good agreement with the experimental data. The
contribution of isovector mesons $\pi$ and $\rho$ , especially the contribution
of the tensor coupling of $\rho$ meson , are discussed in this paper.
