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

被引：55

作者：

Comite, Davide ^{[1
]}

Fuscaldo, Walter ^{[1
]}

Podilchak, Symon K. ^{[2
]}

Re, Pascual D. Hilario ^{[2
]}

Buendia, Victoria Gomez-Guillamon ^{[2
]}

Burghignoli, Paolo ^{[1
]}

Baccarelli, Paolo ^{[3
]}

Galli, Alessandro ^{[1
]}

机构：

[1] Sapienza Univ Rome, Dept Informat Engn Elect & Telecommun, I-00184 Rome, Italy

[2] Heriot Watt Univ, Inst Sensors Signals & Syst, Sch Engn & Phys Sci, Edinburgh Campus, Edinburgh EH14 4AS, Midlothian, Scotland

[3] Roma Tre Univ, Dept Engn, I-00146 Rome, Italy

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2018年 / 66卷 / 06期

关键词：

Backward spatial harmonics; Bessel beams; leaky waves; metallic strip grating; near field; nondiffracting waves; HANKEL APERTURE DISTRIBUTION; LINE SLOT-ARRAY; PHASED-ARRAYS; DIFFRACTION; DESIGN; LENSES; MODES;

D O I：

10.1109/TAP.2018.2823862

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：2828 / 2843

页数：16

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