A Compact Ultrathin Metamaterial Absorber for C, K and Ka Band Microwave Frequency Regime

In this paper, focus is on development of polarization independent absorber having broad angle of incidence, low profile and compactness in microwave frequency range. The unit cell focuses to achieve maximum absorption at C, K and Ka band. The structure is simulated and the results are analysed for different angle of polarization and angle of incidence. The dimensions of structure are ultrathin and compact with 8mm×8mm×0.8mm. The dimensions are optimised in such a fashion to achieve three different peaks at three different microwave bands i.e. C, K and Kaband. The proposed structure after optimization provides peak absorption of 98.49%, 91.1%, and 96.9% at C Band, K and Ka band of microwave regime, respectively.