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- W2796346987 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." @default.
- W2796346987 created "2018-04-13" @default.
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- W2796346987 date "2018-06-01" @default.
- W2796346987 modified "2023-10-02" @default.
- W2796346987 title "Radially Periodic Leaky-Wave Antenna for Bessel Beam Generation Over a Wide-Frequency Range" @default.
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- W2796346987 doi "https://doi.org/10.1109/tap.2018.2823862" @default.
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