A Thin C-Band Polarization and Incidence Angle-Insensitive Metamaterial Perfect Absorber

Humberto Fernández Álvarez; Maria Elena de Cos Gómez; Fernando Las-Heras

doi:10.3390/ma8041666

A Thin C-Band Polarization and Incidence Angle-Insensitive Metamaterial Perfect Absorber

Materials (Basel). 2015 Apr 13;8(4):1666-1681. doi: 10.3390/ma8041666.

Authors

Humberto Fernández Álvarez¹, Maria Elena de Cos Gómez², Fernando Las-Heras³

Affiliations

¹ Signal Theory and Communications Area, Department of Electrical Engineering, University of Oviedo, Multi-Purpose Building, Module 8, Gijón 33203, Asturias, Spain. uo194342@uniovi.es.
² Signal Theory and Communications Area, Department of Electrical Engineering, University of Oviedo, Multi-Purpose Building, Module 8, Gijón 33203, Asturias, Spain. medecos@uniovi.es.
³ Signal Theory and Communications Area, Department of Electrical Engineering, University of Oviedo, Multi-Purpose Building, Module 8, Gijón 33203, Asturias, Spain. flasheras@uniovi.es.

Abstract

A novel metamaterial absorber design able to operate in the C frequency band is presented, along with an analysis and a method to improve both its bandwidth and its angular stability. Simulation results for a FR4-based design are shown for comparison with existing designs. In addition, a simplified equivalent circuit is provided for a better understanding of the great angular stability and wide bandwidth exhibited by the proposed structure. Moreover, simulations, manufacturing and measurements of a thinner and more flexible metamaterial absorber, keeping the angular stability of the former one, while providing a wide bandwidth, are presented.

Keywords: angular stability; double-negative media (DNM); left-handed media (LHM); metamaterial absorber (MMA); negative refractive index (NIR); polarization insensitive.