  Luminosity functions are one of the most important observational clues when
studying galaxy evolution over cosmic time. In this paper we present the X-ray
luminosity functions of X-ray detected AGN in the SXDS and GWS fields. The
limiting fluxes of our samples are 9.0x10^(-15) and 4.8x10^(-16)
erg/cm^2/sec^(-1) in the 0.5 - 7.0 keV band in the two fields, respectively. We
carried out analysis in three X-ray bands and in two redshift intervals up to z
< 1.4. Moreover, we derive the luminosity functions for different optical
morphologies and X-ray types. We confirm strong luminosity evolution in all
three bands, finding the most luminous objects at higher redshift. However, no
signs of density evolution are found in any tested X-ray band. We obtain
similar results for compact and early-type objects. Finally, we observe the
`Steffen effect', where X-ray type-1 sources are more numerous at higher
luminosities in comparison with type-2 sources.
