Vortex circular airy beams through leaky-wave antennas

被引：0

作者：

Benedetti, Alessio ^{[1
]}

Comite, Davide ^{[1
]}

Fuscaldo, Walter ^{[2
]}

Baccarelli, Paolo ^{[3
]}

Galli, Alessandro ^{[1
]}

Burghignoli, Paolo ^{[1
]}

机构：

[1] Sapienza Univ Rome, Dept Informat Engn Elect & Telecommun, Via Eudossiana 18, I-00184 Rome, Italy

[2] Ist Microelettron & Microsistemi CNR IMM, Consiglio Nazl Ric, Viadel Fosso Cavaliere 100, I-00133 Rome, Italy

[3] Roma Tre Univ, Dept Ind Elect & Mech Engn, Via VitoVolterra 62, I-00146 Rome, Italy

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2024年 / 57卷 / 12期

关键词：

airy beams; leaky-wave antennas; angular momentum; twisted fields; spiral antennas; vortex beams; accelerated beams; ORBITAL ANGULAR-MOMENTUM; GENERATION; MODES; ORDER;

D O I：

10.1088/1361-6463/ad16a7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A novel method to design leaky-wave antennas radiating vortex cylindrical Airy beams at microwave frequencies is here presented. Two different approaches are adopted to produce waves with a nonzero orbital angular momentum (OAM): one based on a bull's eye design excited by a uniform circular array of vertical coaxial probes with proper azimuthal phase delay, and one based on a single coaxial feeder exciting a multi-spiral radiator. Both of them take advantage of backward radial propagation of cylindrical leaky waves promoting circular Airy beams with vortex patterns. The OAM state can be changed by either varying the probe phasing or the number of spiral units. A reference profile is designed under transverse-electric and transverse-magnetic excitation independently. Numerical full-wave analysis are performed using different angular states to validate the antenna design, as well to highlight the different advantages of the two alternative design approaches.

引用

页数：12

共 48 条

[11] Simple generation of orbital angular momentum modes with azimuthally deformed Cassegrain subreflector [J].