Browsing by Keyword "Corrugated plate"
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Item Enhanced microwave transmission and beaming using a subwavelength slot in corrugated plate(2004-12) Beruete, M.; Campillo, I.; Dolado, J. S.; Rodríguez-Seco, J. E.; Perea, E.; Sorolla, M.; Tecnalia Research & Innovation; POWER SYSTEMS; DIGITAL ENERGYEnhanced microwave transmission and beaming through a subwavelength slot placed into a corrugated conducting plate is experimentally observed compared with the case of the single isolated slot. This phenomenon is similar to that happening for optical wavelengths where surface plasmons model is employed to describe the metal. This letter shows that the phenomenon is also present in the microwave range where perfect conductor model applies. Enhanced subwavelength transmission and beaming stimulates new research for future applications.Item Low-profile corrugated feeder antenna(2005) Beruete, M.; Campillo, I.; Dolado, J. S.; Rodriguez-Seco, J. E.; Perea, E.; Falcone, F.; Sorolla, M.; Tecnalia Research & Innovation; POWER SYSTEMS; DIGITAL ENERGYA very low-profile planar rectangular horn antenna made of a subwavelength aperture surrounded by two grooves on the conducting plate is presented. This structure exhibits good return losses and radiated beam. Its operation is based upon enhanced transmission and beaming through apertures in metallic corrugated plates. Here, the corrugated structure is designed to operate in microwaves and, moreover, a waveguide flange, which has been properly mechanized in the rear part of the structure, is employed for excitation. A new very low-profile planar feeder with reduced size is introduced that could be properly scaled for potential wireless applications.Item Very low profile and dielectric loaded feeder antenna(2007) Beruete, M.; Campillo, I.; Dolado, J. S.; Rodríguez-Seco, J. E.; Perea, E.; Falcone, F.; Sorolla, M.; Tecnalia Research & Innovation; POWER SYSTEMS; DIGITAL ENERGYIn this letter, very low profile planar horn antenna feeders are designed and measured. Using previous results of antennas consisting of a narrow slot on a metallic plane and flanked by two grooves, a further step is given here by reducing the thickness of the prototype. A key factor in the approach is the operation in the transversal slot resonance instead of the usual longitudinal slot resonance. Moreover, by inserting a dielectric material of relative permittivity εr > 1, the thickness can be further reduced, maintaining and even improving the radiation features of the prototype. Reducing the metallic plate thickness has important consequences in the weight and profile of the antennas, making them easy to handle and to fit into different structures. In addition, in ranges where the wavelength is of the order of centimeters, a thick metallic plate can be a serious drawback due to mechanical restrictions. In these cases the design following the rules given in this letter can alleviate this constraint.