Figure 1
From: Single-shot and single-sensor high/super-resolution microwave imaging based on metasurface
(a) The single-shot and single-sensor far-field imaging system based on a metasurface, which is composed of a cluster of strongly coupled subwavelength resonators. To efficiently convert the evanescent waves of the object under detection to the far field, the object should be in the vicinity of the metasurface. (b) The geometry of unit cell used to construct the metasurface, where s = 6.67 mm, p = 6 mm, t = 0.5 mm, d = 1.75 mm and w varies from 0.6 mm to 4.8 mm to control the ELC resonant frequency. (c) The electric polarizabilities of unit cells retrieved from the method of dipole approximation when w = 1 mm, 2.6 mm and 4.0 mm, respectively.
