A low-profile metasurface (MS) with low scattering performance for both the x- and y-polarizations is designed based on far-field cancellation. Different from a conventional MS with a low radar cross section that uses chessboard structures, this design makes use of a 1-D MS. Without requiring periodicity in two dimensions, the proposed MS can thus be integrated more flexibly in many applications. Based on the proposed MS, a patch antenna array is proposed. Full-wave simulations and measurements show that, by incorporating the proposed MS, the scattering of the antenna array can be reduced by more than 5 dB over the antenna operating frequency band from 10.7 to 12 GHz (11.45) under normal incidence. Furthermore, when the array radiates, parasitic radiation can be excited from the slots of the MS, which enhances the boresight gain of the array.
展开▼
