Broadband RCS reduction of Microstrip Antenna Using Conformal Metasurface

Abstract

In this paper, a low-RCS conformal antenna for cylindrical platform application is proposed. To improve the aperture utilization rate, circular radiation patch is adopted. Fan-shaped metasurface cells are arranged around the antenna to form a dual-ring layout. Based on phase cancellation principle, both in-band and out-of-band RCS reductions are achieved. Simulated results show that the proposed antenna achieves broadband RCS reduction from 5.0 GHz to 9.5 GHz. Meanwhile, the well-behaved radiation performance is kept.