A wideband metamaterial absorber (MA) using anti-symmetric geometries is presented in this paper. The absorber unit cell consists of two pairs of circular ring slots of different sizes on the top surface of 0.8 mm thin FR4 substrate of size 6 mm × 6 mm which is the unique feature of the proposed design. It shows an absorption coefficient greater than 90% at the centre frequency of 10 GHz and absorption bandwidth of 0.9 GHz. A 10 × 10 proto type of the MA is fabricated, and measurements show that the results agree well with full-wave simulation response. Furthermore, circuit model of the MA is developed and its physical interpretation is examined. The proposed absorber is angularly stable up to 50° for oblique incident angles of electromagnetic wave. The proposed design may be a potential candidate for real-time modern radar installation applications including radar cross section reduction and electromagnetic shielding due to its wideband absorption and good angular stability.