Ultra-Thin Absorbers Comprised by Cascaded High-Impedance and Frequency Selective Surfaces

作者：Panaretos Anastasios H^*; Brocker Donovan E; Werner Douglas H

来源：IEEE Antennas and Wireless Propagation Letters, 2015, 14: 1089-1092.

DOI：10.1109/LAWP.2015.2390145

• Equivalent circuit
• frequency selective surface (FSS)
• high impedance surface (HIS)
• thin absorber

The theoretical basis for an ultra-thin broadband absorber is established which is comprised of a mushroom-type high impedance surface (HIS) and a pixelized frequency selective surface (FSS). The latter is engineered to exhibit a prescribed series RLC circuit response and it is placed at an electrically small distance above the HIS. Through a transmission line analysis, it is demonstrated that the admittances of the two structures cancel each other, resulting in an almost zero input reactance and a resistance that fluctuates around that of free space within the frequency range of interest. The resulting structure has a total thickness that does not exceed 2 mm while a -10 dB return loss is achieved for normal incidence from 9 - 13 GHz.

• 出版日期2015