One of unusual features of high-Tc superconductors, that we discuss
in the present report, is related to inhomogeneous distribution of holes.
It results in a stripe-phase which consists of antiferromagnetic domains
separated by hole-rich domain walls. We study how the upper critical field
is affected by this specific distribution of carriers. We consider a twodimensional
square lattice immersed in a perpendicular uniform magnetic
field. In order to simulate the presence of a stripe-phase we carry out the
calculations for a system with modulated hopping integral. Namely, the
magnitude of the hopping integral is constant along the stripe, whereas it
oscillates in the opposite direction
