The topic of instantaneous measurement of radar target polarization characteristics is of great importance in such fields as polarimetric radar and target recognition.In this paper

the problem of polarization scattering matrix measurement of the reciprocal target is discussed for the case of frequency-shifted waveforms.Radar echoes are modeled for the instantaneous polarization measurement.On the basis of target returns’ polarization characteristics

a frequency-domain estimate algorithm is presented for the instantaneous polarization measurement using the discrete time Fourier transform (DTFT).Algorithm performance is evaluated and theoretical formulae are derived.Efficiency of this algorithm is validated by experiment results.