Agile Bessel Beam Leaky-Wave Launcher With Suppressed Open Stopband and Multiport Feeding

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-06-19 DOI:10.1109/LAWP.2025.3581066

Sadia Riaz;Davide Comite;Paolo Baccarelli;Symon K. Podilchak

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Abstract

This work investigates the generation of Bessel beams from a double-strip bull-eye planar leaky-wave launcher. The structure offers wideband operation and an extended non-diffracting range, thanks to the suppression of the open stopband, which typically affects periodic leaky-wave antennas. A comparative analysis is reported with a single-strip implementation, which shows the stopband and therefore offers a reduced non-diffracting range. To enhance functionality with respect to conventional bull-eye structures operating in the near-field, the double-strip launcher is excited through a flexible substrate integrated waveguide multiport feeder, which enables dual-polarization and controllable aperture fields and allows for the generation of both zeroth- and first-order Bessel beams. Both simulations and measurements are reported, demonstrating beam focusing over larger distances in the near-field. Also, for the first time, an adaptable and polarization agile launcher is studied and experimentally validated to increase the non-diffractive range of a planar and compact structure.

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具有抑制开阻带和多端口馈电的敏捷贝塞尔波束漏波发射器

本文研究了双条形牛眼平面漏波发射装置产生的贝塞尔光束。由于抑制了通常会影响周期性漏波天线的开阻带，该结构提供了宽带操作和扩展的非衍射范围。与单条带实现的比较分析报告，它显示了阻带，因此提供了一个减少的非衍射范围。为了增强在近场操作的传统牛眼结构的功能，双带发射器通过柔性衬底集成波导多端口馈线激发，从而实现双偏振和可控孔径场，并允许产生零阶和一阶贝塞尔光束。模拟和测量结果都显示了光束在近场中更大距离上的聚焦。同时，首次研究了一种可适应偏振敏捷发射装置，并进行了实验验证，以增加平面紧凑结构的无衍射范围。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.