RT Journal Article T1 Very low-profile "bull's eye" feeder antenna A1 Beruete, M. A1 Campillo, I. A1 Dolado, J. S. A1 Rodríguez-Seco, J. E. A1 Perea, E. A1 Falcone, F. A1 Sorolla, M. AB In this letter, a very low-profile planar horn antenna is proposed. It consists of a subwavelength aperture placed into a "Bull's Eye" concentric periodic corrugated conducting plate that produces good return losses and a narrow radiated beam. The antenna is excited by means of a waveguide whose flange has been properly mechanized in the rear part of the structure. The mechanism explaining this phenomenon is similar to the enhanced transmission observed at optical wavelengths in similar structures. In this work, the circularly corrugated structure has been scaled into the microwave frequency range and, moreover, the plane wave excitation has been replaced by a subwavelength aperture excited by a conventional closed metallic waveguide. This transforms the original focusing structure into a new concept of a very low-profile feeder with potential applications. SN 1536-1225 YR 2005 FD 2005 LK https://hdl.handle.net/11556/4187 UL https://hdl.handle.net/11556/4187 LA eng NO Beruete , M , Campillo , I , Dolado , J S , Rodríguez-Seco , J E , Perea , E , Falcone , F & Sorolla , M 2005 , ' Very low-profile "bull's eye" feeder antenna ' , IEEE Antennas and Wireless Propagation Letters , vol. 4 , no. 1 , pp. 365-368 . https://doi.org/10.1109/LAWP.2005.851104 NO Manuscript received October 26, 2004; revised April 27, 2005. This work was supported by CICYT and EU-FEDER by Project Contracts TIC2002-04528-C02-01 and TIC2002-04528-C02-02. M. Beruete, F. Falcone, and M. Sorolla are with the Departamento de Ingeniería Eéctrica y Electrónica, Universidad Pública de Navarra, Campus Arrosadía, E-31006 Pamplona, Spain. I. Campillo, J. S. Dolado, J. E. Rodríguez-Seco, and E. Perea are with Labein Centro Tecnológico, 48160 Derio (Bizkaia), Spain. Digital Object Identifier 10.1109/LAWP.2005.851104 Fig. 1. (a) Front view of the Bull’s Eye antenna. (b) Cross section representation with its relevant parameters h = 12 mm, a = 11:54 mm, d = 17 mm, l = 10 mm, w = 3:4 mm, the small dimension of the slit is b = 2 mm. DS TECNALIA Publications RD 30 jul 2024