TE-polarized leaky-wave beam launchers: Generation of Bessel and Bessel-Gauss beams

被引:2
|
作者
Negri, E. [1 ]
Fuscaldo, W. [2 ]
Gonzalez-Ovejero, D. [3 ]
Burghignoli, P. [1 ]
Galli, A. [1 ]
机构
[1] Sapienza Univ Rome, Dept Informat Engn Elect & Telecommun, I-00184 Rome, Italy
[2] Ist Microelettron & Microsistemi, Consiglio Nazl Ric, I-00133 Rome, Italy
[3] Univ Rennes, Inst Elect & Technol numeR IETR, CNRS, UMR 6164, F-35000 Rennes, France
关键词
HIGH-SPEED; DESIGN; DIFFRACTION;
D O I
10.1063/5.0234371
中图分类号
O59 [应用物理学];
学科分类号
摘要
The generation of focused beams in the millimeter- and submillimeter-wave ranges, with transverse-electric (TE) polarization, is investigated in the radiative near-field region. The desired field distribution is achieved through a leaky-wave beam launcher consisting of a grounded dielectric slab with an annular strip grating on top excited by a circular slot on the bottom ground plane. The latter is fed by a Marie transducer, which converts the input, fundamental TE10 mode of a standard rectangular waveguide into the higher-order TE01 mode propagating in the circular waveguide connected to the device. The generation of TE-polarized diffraction-limited Bessel and Bessel-Gauss distributions is achieved by suitably synthesizing the annular strip grating. Simulated results are in excellent agreement with those predicted by leaky-wave analysis providing a proof-of-concept for the generation of TE-polarized Bessel and Bessel-Gauss beams at 300 GHz with a beam size of 1.7 and 1.9 mm up to the nondiffractive range of about 25 and 15 mm from an aperture plane with radius of 12.75 mm, respectively.
引用
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页数:6
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