Performances of an Ultra-Thin AMC and FSS for 5G Applications

This paper presents an ultra-thin Artificial Magnetic Conductor (AMC) and Frequency Selective Surface (FSS). Both AMC and FSS structure are printed on RT/Duroid 5880 high frequency laminate (thickness = 0.254mm, permittivity = 2.2). AMC structure is fully metal laminated meanwhile FSS structure is non-metal laminated at the back surface. Reflection phase and magnitude, impedance surface are evaluated for AMC while transmission and reflection coefficients are proposed by FSS. The stability of both structures are also investigated in order to identify the stability when dealing with different angle of incidence. Then, the AMC with multi-layer FSS is introduced to enhance the initial bandwidth of AMC which is 0.33% to 0.41% with 0.595 mm of overall thickness. AMC with double FSS with 0.875 mm thickness enhanced the AMC bandwidth up to 0.45%. An ultra-thin AMC and FSS can be integrated with low profile antenna to enhance the antenna performances for 5G applications.