Experimental demonstration of a dual-band electromagnetic band-gap resonator antenna made out of a simple, single-layer frequency selective surface

The new concept for realizing a dual-band electromagnetic band-gap (EBG) resonator antenna using a simple, single-sided frequency selective surface (FSS) is demonstrated experimentally. The reversal of the gradient of the FSS reflection coefficient phase response, around a FSS resonance frequency, is exploited to achieve two cavity resonance bands in which the FSS behaves as a partially reflective surface (PRS) with an appropriate reflection phase. An FSS, with rectangular slots printed on one surface, is considered for demonstration. The measured performance of a prototype antenna in two bands, around 11.4 GHz and 13.4 GHz, is presented.