  We present the first observations of spatially resolved oscillation sources
obtained with the Siberian Radioheliograph (SRH) at 3-6 GHz. We have found
significant flux oscillations with periods of about 3, 5 and 13 minutes emitted
from AR12833. The 3-minute periodicity dominates at higher frequencies. It was
found that the apparent level of oscillations depends on the active region
location on the disc, and scales down towards the limbs. The oscillations were
studied in detail during one hour interval on June 19, 2021. We found that
sources of 3-min oscillations were located above the umbra and their emission
is extraordinary polarized. The 5 and 13-min periods were manifested in
emission at lower frequencies, down to 2.8 GHz. Sources with 5-min periodicity
were located near the umbra-penumbra boundary and in the pore region. Positions
of sources with 13-min oscillations were different at 3.1 GHz and 4.7 GHz. We
found consistency between spatial location of the oscillation sources in radio
and UV in 171A and 304A. There is significant correlation of signals in two
ranges. Time delays between microwave oscillations increase as the frequency
decreases, which can be explained by upward propagation of periodic
disturbances. The localization of oscillation sources is probably related to
magnetic structures with different wave cutoff frequencies at different
heights. The obtained results show that SRH can provide the spatial resolved
observation of the oscillations in the intensity and polarization channels in
3-6 GHz band.
