Optically Transparent 1-D EBG Antenna Using Sub-Skin Depth Thin-Film Alloy in the Ka-Band

This paper describes an optically transparent one dimensional (1-D) electromagnetic bandgap (EBG) antenna using sub-skin depth thin-film alloy for millimeter-wave frequencies. The measured attenuation factor of RF testing devices fabricated with sub-skin depth thin-film alloy is characterized to be less than 0.3 dB/mm at 30 GHz. To ensure high directivity in the end-fire direction, 1-D EBG unit cells are implemented on the top surface of the thin-film alloy.