Radially Periodic Leaky-Wave Antenna for Bessel-Beam Generation over a Wide Frequency Range

Davide Comite, Walter Fuscaldo, Symon K. Podilchak, Pascual D. Hilario Re, Victoria Gomez-Guillamon Buendia, Paolo Burghignoli, Paolo Baccarelli, Alessandro Galli

Research output: Contribution to journalArticle

18 Citations (Scopus)
60 Downloads (Pure)

Abstract

A radially periodic 2-D leaky-wave (LW) antenna is studied for the generation of zeroth-order Bessel beams within a limited spatial region and over a wide-frequency range. The antenna design is wideband and based on an annular metal strip grating placed on the top of a grounded dielectric slab, supporting a cylindrical leaky wave (CLW) with a fast backward spatial harmonic. The focusing capabilities of the relevant LW aperture fields are investigated over the considered frequency range (15-21 GHz), in conjunction with the dispersion analysis of the optimized structure, which is developed by means of an efficient in-house method of moments code. Full-wave simulations using a commercial tool including a simple coaxial feeder are presented and discussed, demonstrating the desired wideband operation. The antenna design is validated by means of measurements performed on a manufactured prototype, considering different frequencies and components of the electric field within the nondiffracting range of the system. The proposed design represents an attractive simple and low-cost solution potentially able to generate arbitrary-order Bessel beams at microwaves as well as in the millimeter-wave and terahertz frequency regions.
Original languageEnglish
Pages (from-to)2828-2843
Number of pages16
JournalIEEE Transactions on Antennas and Propagation
Volume66
Issue number6
Early online date6 Apr 2018
DOIs
Publication statusPublished - Jun 2018

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