Dual-Band FSS based Microwave Absorber for WiMAX & WLAN Band Applications

In this paper, an ultrathin FSS has been designed for the absorption purpose. The proposed microwave absorber gives maximum absorption at 3.5 GHz & 5.5 GHz frequencies. The geometry consists conductive two arbitrary shaped patch element on a grounded lossy FR4 dielectric substrate. The designed microwave absorber is ultrathin as its thickness is just A/142 (0.6 mm), A corresponds to wavelength of 3.5 GHz frequency which is the lowest resonant frequency. The proposed microwave structure can have wide application for the security of internal wireless communication at Wi-MAX & WLAN band applications.