Design of a Dual Band Independently Tunable Microwave Absorber

A dual band microwave absorber (MA) with independently tunability is proposed for X-Band applications. The unit cell of the MA is composed of cross-slot with unequal length on the top metallic layer. The dual band characteristics and its tunability is obtained with changing of the cross-slot lengths. The parametric studies on the slot lengths are performed to study the performance of the absorber at different frequencies in the X-Band. The surface current distribution at the different metallic layers are analysed to get more insight behind the absorption mechanism.