Browsing by Author "Falcone, Francisco"
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Item Dual-band low-profile corrugated feeder antenna(2006-02) Diaz, Miguel Beruete; Campillo, I.; Dolado, J. S.; Rodríguez-Seco, J. E.; Perea, E.; Falcone, Francisco; Ayza, Mario Sorolla; Tecnalia Research & Innovation; POWER SYSTEMS; DIGITAL ENERGYA dual-operating-band planar horn antenna having very low profile is presented in this paper. By opening a subwavelength aperture into a corrugated conducting plate, good return losses and a narrow radiated beam in each of the two desired operating frequency bands can be measured. This behavior is very similar to that observed in optical wavelengths where enhanced transmission was measured through apertures etched in metallic corrugated plates. Here, the double-corrugated structure has been scaled into the microwave frequency range and the excitation has been done by a conventional closed metallic waveguide placed in the rear part of the structure. In this way, a new concept of a very low profile feeder is proposed with potential wireless applications.Item Extraordinary transmission surfaces as superstrate(2009) Beruete, Miguel; Navarro-Cía, Miguel; Falcone, Francisco; Sorolla, Mario; Campillo, Igor; Rodríguez-Seco, J. E.; Perea, E.; Núñez-Manrique, I. J.; POWER SYSTEMS; DIGITAL ENERGY; Equipos ElectrónicosIn this work we explore in the microwave regime the modification of the radiation pattern of a commercial horn antenna when 1 and 4 stacked subwavelength hole arrays are placed as a superstrate. We report a clear enhancement of the E-plane while the H-plane remains almost unaltered when either 1 or 4 layers are inserted. We link the results with the current density excited in the output face of the perforated structure along with the backward propagation supported by the Extraordinary Transmission Metamaterial.