  The penetration depth of anisotropic two-band s-wave superconductors have
been studied by Ginzburg-Landau approach. The anisotropic spherical Fermi
surfaces and order parameters with the spherical ellipse or pancake Fermi shape
are used for derive penetration depth equation. The numerical calculation of
pancake-pancake and pancake-ellipse Fermi sphere shape are fits well with the
experiment data of MgB2 and CaAlSi superconductor, consequently. Our model
should be the way to increase understanding in the microscopic mechanism of
occurrence of the penetration depth in superconductivity state of these
material
