1‐&mgr;m‐wide Dayem bridges were patterned with a pulsed Xe laser inc‐axis‐oriented YBaCuO films prepared according to the BaF2method. The microbridges have a critical current density of 2×106A/cm2at 77 K, which is typical for an epitaxial film without grain boundaries. When microwave radiation in the centimeter wavelength range is applied, we observe current steps in the current‐voltage characteristic up to 72 K. The dependence of these steps on microwave power is compared with the model of Golovashkin and Lykov {Zh. Eksp. Teor. Fiz.74, 214 (1978) [Sov. Phys. JETP47, 110 (1978)]}; we find that the step amplitude is smaller than predicted.