We have developed a 3-D high-resolution radar at 300 GHz with a cell resolution of 1 1.6 1.6 cm at a standoff distance of 8 m for security applications. The selection of an operating frequency of 300 GHz, a bandwidth of 27 GHz, and a field of view of 50 90 cm improves the through-clothes imaging of person-borne concealed objects. The radar's antenna design allows single-pixel imaging at a frame rate of two frames per second. A reduction in cost and power consumption and improvements in image quality are additional requirements taken into account in the design of this radar system.Index Terms-Continuous-wave linear-frequency modulation (CW-LFM), field of view (FoV), imaging radar, millimeter wave.

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