In order to obtain a high resolution microwave images, backscattering microwave fields from two conducting poles on a rotating objects is measured. The measured backscattered data is taken as steps of 1.8 degree intervals for 360˚ rotation and of 11 different frequencies having 400MHz intervals from 8GHz to 12GHz. A computation algorithm to reconstruct two pole images from these 200×11 measured data is programmed. The program is tested for one pole or two poles on a rotating objects and for rotating angles of 360˚, 180˚, 90˚, 60˚, 30˚ and 10˚ and for different frequency intervals between 8 to 12GHz. The calculated results show that the point spread function for one pole object shows that the first side lobe level is -13.3 dB for 3 different frequencies for 360˚ measurement. The more frequency data yield the reduction of side lobe levels but the less angular data widens the image point. The typical measured data are taken in an anechonic chamber for 200 angluar points and for 11 different frequencies in the 8 to 12GHz range by two open ended rectangular waveguide horns, one for the transmitting and the another for the receiving antenna. The co-polarization coupling between these two antennas is less than -50 dB over the whole X-band frequency range. The reconstructed image for one pole shows that the first side lobe level is -10.2 dB below the main object level(-14.6 dB for simulation). The reconstructed image for the two pole objects having the diameter of 1cm and departed by 10cm from the measured data is shown and it assumes that this reconstructing algorithm from the measured angular spectrum provides quite accurate images.
