Single-Layer Wideband Wide-Angle Microwave Absorber for Stealth Applications

This paper presents a single-layer wideband wide-angle microwave absorber for stealth applications. The absorber is designed on a low-cost FR4 substrate of thickness 3.2 mm. Full width at half maximum absorption bandwidth (FWHB) of the absorber is 48.78 % (6.71-11.04 GHz) with wide incident angle (-60
⁰
<; θ <; 60
⁰
). More than 80 % of both of TE and TM polarized incident waves is absorbed for a wide incident angle. The bistatic and monostatic radar cross section (RCS) are reduced by 14 dBsm as compared to those of a perfect electric conductor (PEC) plate at 9.5 GHz. The proposed absorber operates as a good absorber for a wide incident angle and all polarization angles.