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We study the angular power spectra of the polarized component of the Galacticsynchrotron emission in the 28-deg^2 Test Region of the Southern Galactic PlaneSurvey at 1.4 GHz. These data were obtained by the Australia Telescope CompactArray and allow us to investigate angular power spectra down to arcminutescales. We find that, at this frequency, the polarization spectra for E- andB-modes seem to be affected by Faraday rotation produced in compact foregroundscreens. A different behavior is shown by the angular spectrum of the polarizedintensity PI=\sqrt{Q^2+U^2}. This is well fitted by a power law with slope\~1.7, which agrees with higher frequency results and can probably be moreconfidently extrapolated to the cosmological window.Comment: 11 pages, 6 figures, accepted for publication in Ap

Polarization Angular Spectra of Galactic Synchrotron Emission on Arcminute Scales