Cuadrado, AlexanderLópez-Alonso, José ManuelMartínez Antón, Juan CarlosEzquerro Rodríguez, José MiguelGonzález, Francisco JavierAlda, Javier2023-06-182023-06-182015-08-280277-786X10.1117/12.2187946https://hdl.handle.net/20.500.14352/24500ISBN: 978-162841713-5 CODEN: PSISD Copyright 2015 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.Fractal antennas have been proposed to improve the bandwidth of resonant structures and optical antennas. Their multiband characteristics are of interest in radiofrequency and microwave technologies. In this contribution we link the geometry of the current paths built-in the fractal antenna with the spectral response. We have seen that the actual currents owing through the structure are not limited to the portion of the fractal that should be geometrically linked with the signal. This fact strongly depends on the design of the fractal and how the different scales are arranged within the antenna. Some ideas involving materials that could actively respond to the incoming radiation could be of help to spectrally select the response of the multiband design.engAtribución-NoComercial 3.0 Españahttps://creativecommons.org/licenses/by-nc/3.0/es/journal articlehttp://dx.doi.org/10.1117/12.2187946open access535.3537.533.3optical antennasfractal antennasmultiband antennasMicrowave technologyRadio frequenciesÓptica (Física)Óptica geométrica e instrumentalOptoelectrónica2209.19 Óptica Física2209.06 Óptica geométrica