An integrated 2‐bit metasurface array antenna with broadband low radar cross‐section covering large incident angle space

Abstract

Based on an integrated design of metasurface units and antenna elements, a 2-bit metasurface array antenna with broadband low radar cross-section (RCS) covering large incident angle space is proposed in this study. The slot width's influences on the reflective phase and element radiation performance are analysed. Furthermore, a genetic algorithm is utilised to obtain the coding pattern of the array antenna with diffuse scattering characteristics. A wideband RCS reduction is achieved from 4.2 to 9.0 GHz under xpolarised incidence, and it has oblique incident angle stability ranging from 0°to 60°d ue to non-uniform element arrangement. The current cancelation phenomenon is found to reveal the RCS reduction mechanism. Besides, the proposed antenna gain is 15.9 dBi with a peak aperture efficiency of up to 90.8%. Experimental results have a close coincidence with the simulations, which verifies the capability of the proposed design.

Microwave Imaging and Sensing Techniques for Breast Cancer Detection

“…Recently, researchers have started utilizing new technologies such as MTM [ 17 ], MTS [ 18 ], and AMC [ 19 ] in the development of microwave antennas. For instance, Hamza et al [ 16 ] proposed an MTM microstrip patch antenna with AMC to enhance gain, achieving a gain of 10.61 dBi at 8.6 GHz.…”

“…However, there is room for improvement in their radiation capacity, gain, and bandwidth [ 17 ]. Recently, there have been advancements in the development of custom antennas using metamaterial (MTM), metasurface (MTS), and artificial magnetic conductor (AMC) technologies [ 16 , 17 , 18 , 19 , 20 ]. These technologies present opportunities for the sensitivity and accuracy of MBI systems.…”