Design and Implementation of a Wideband Flat Lens in Near Field RADAR Cross Section Reconstruction

Estimating RCS by near field methods has achieved great significance because of noticeable cost reductions. In this research we pursue RCS reconstruction by near field imaging with small processing load in laboratory conditions. A 10×10 cm meta surface lens in the 10-12 GHz frequency is designed and simulated for estimation of RCS, using near field imaging method which obtains the aperture efficiency and -1dB bandwidth of 32% and 7% respectively. This microwave lens is able to reduce the beam width by half. In this method, we ignore the image reconstruction step and use the obtained fields directly on a plane to estimate the RCS, causing a reduction in the volume of processing. The results show improvement in the estimated RCS, in addition to reducing the experiment distance, thus ensuring the possibility of implementation in the laboratory.