Performances of Flexibel Antenna with Ultra-Thin AMC and AMC with Multi-Layer FSS

This paper presents the performances of wideband antenna with ultra-thin Artificial Magnetic Conductor (AMC), with multi-layer Frequency Selective Surface (FSS). The antenna and both AMC and FSS structures were printed on RT/Duroid 5880 high frequency laminate (thickness = 0.254mm, permittivity = 2.2). The performances of the antenna, antenna with AMC and AMC with multi-layer FSS were evaluated. The AMC and AMC with multi-layer FSS were positioned at the back of the antenna with λ 2.8 9 mm air gap. The highest increament of antenna's bandwidth was approximately 3.21%, 1.29 GHz to 1.73 GHz as worked with AMC with multi-layer FSS. Meanwhile the 4.43 dB gain of the antenna was pushed up to 6.74 dB with the AMC with multi-layer FSS. The antenna and AMC with multi-layer FSS can be applied on body applications which is appropriate to reduce the radiation that penetrates into human.