  A sample of Nobeyama flares was selected and analyzed using loop model for
important flare parameters. The model for the flaring region consists of a
three dimensional dipolar magnetic field, and spatial distributions of
non-thermal electrons. We constructed a database by calculating the flare
microwave emission for a wide range of these parameters. Out of this database
with more than 5,000 cases we extracted general flare properties by comparing
the observed and calculated microwave spectra. The analysis of NoRP data was
mostly based in the center-to-limb variation of the flare properties with
looptop and footpoint electron distributions and for NoRH maps on the resultant
distribution of emission. One important aspect of this work is the comparison
of the analysis of a flare using an inhomogeneous source model and a simplistic
homogeneous source model. Our results show clearly that the homogeneous source
hypothesis is not appropriate to describe the possible flare geometry and its
use can easily produce misleading results in terms of non-thermal electron
density and magnetic field strength. A center darkening of flares was also
obtained as a geometrical property of the loop-like sources.
