In this article, the design of a dual-band FSS-based absorber with high angular stability has been proposed to function from 3.4–4.6 GHz to 7.9–9 GHz. An air gap of 1.6 mm is kept between two identical layers of concentric split ring resonator based FSS. The bottom FSS has a metallic backing to ensure minimum transmission. A square patch-based microstrip antenna has been designed to operate at 6.1 GHz. When this antenna is integrated with the absorber, out of band RCS reduction of the antenna takes place for a wide range of frequencies. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021.