Design Of Absorptive/Transmissive Integrated Metasurface With Lumped Resistors

An integrated metasurface which can realize ultra-wideband absorption in low frequency band and transmission in high frequency band with very small insertion loss is designed and simulated. It is composed of a band pass frequency selective surface (FSS) layer and a loss layer loaded with lumped resistances. At the same time, the unit cell of the metasurface is a central symmetric structure with good stability of the electric field polarization angle of the incident wave. In addition, the structure is simple, easy to process and manufacture. The simulation results show that the absorptivity of the metasurface is greater than 89.8% in 3.84 GHz similar to 9.06 GHz and even reached 99.9% at 7.09 GHz. The insertion loss at passband center 12.7 GHz is only -0.2dB.