Imaging of an object by measuring the angular spectrum of microwave fields is presented. Microwave angular spectrum of two conducting wires is obtained by measuring the amplitude and phase of the scattered field in the anechoic chamber in the frequency range of 8 to 12 GHz by rotating the object.
The resolution of the object is obtained from the measured data about 0.4λ which is compared with that of 0.2λ from the calculation of the side lobes of the scattered fields, where λ is the free space wavelength. Two wire images is reconstructed by averaging over the wide frequency band signals to reduce side lobe effects. The high side lobe effects may be reduced by using only the imaginary values of the angular spectrum.