Broad-band Absorptive Metasurface for Ku- & K-band Frequency Channels

In this paper, a square ring resonator based, wide-band absorptive metasurface is presented, capable of absorbing incident waves in frequencies that cover sections of the Ku and the K bands. The proposed metasurface is implemented with an array of cells which consist of a combination of two rhomboid ring resonators with four ohmic resistors integrated in the inner square to enhance absorption of the reflected wave. The designed structure can support scalability of absorption in both transverse electric (TE) and transverse magnetic (TM) modes by changing the value of the ohmic resistors. The reported the percentage of absorption varies between 80 and 100% in 5 GHz frequency range, from 16.1 to 21.1 GHz.