Dielectric EBG Leaky-Wave Antenna: Design and Experimental Validation

IF 3.6 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Ludovica Tognolatti;Paolo Baccarelli;Cristina Ponti;Silvio Ceccuzzi;Vakhtang Jandieri;Giuseppe Schettini
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引用次数: 0

Abstract

This paper proposes a novel Electromagnetic Band-Gap (EBG) leaky-wave antenna (LWA) operating in the K-band with enhanced directivity at broadside. A rigorous method that combines the analysis of the band diagrams of Bloch waves propagating within two-dimensional (2-D) EBG structures and the properties of bound and leaky modes in transversely open lattice waveguides is used to design the antenna. For the first time, a three-dimensional (3-D) realistic configuration of the EBG structure is designed, manufactured, and measured in the K-band. An effective leaky-wave approach is applied in conjunction with the use of “ad-hoc” and commercial EM full-wave software for the accurate design of the structure to be realized. The prototype consists of $7\times {\times }8$ alumina cylinders positioned above a ground plane and supported by two vertical metal plates. The antenna is fed by two counterphase monopoles. A rat-race hybrid junction, located just below the antenna, feeds the two monopoles. The measurements show a very good agreement with the adopted leaky-wave model. Experimental results show a broadside directivity of 12.8 dBi and a return loss of 24 dB at the frequency of $f = 24.6$ GHz. The design reported operates in the K-band in reason of its application for the project PRIN 2017 WPT4WID under grant 2017YJE9XK005.
介电EBG漏波天线:设计与实验验证
本文提出了一种工作在k波段的新型电磁带隙漏波天线(LWA),其宽侧指向性增强。采用了一种严格的方法,结合了布洛赫波在二维(2-D) EBG结构中传播的带图分析和横向开点阵波导中束缚模式和泄漏模式的特性来设计天线。首次设计、制造和测量了三维(3-D) EBG结构的真实结构。为了实现结构的精确设计,采用了一种有效的漏波方法,并结合使用了“ad-hoc”和商用EM全波软件。原型由放置在地平面上的$7\times {\times}8$氧化铝圆柱体组成,并由两块垂直金属板支撑。天线由两个反相单极子馈电。位于天线正下方的“老鼠赛跑”混合结为两个单极子提供能量。测量结果与所采用的漏波模型吻合较好。实验结果表明,在$f = 24.6$ GHz频率下,该天线的宽带指向性为12.8 dBi,回波损耗为24 dB。所报告的设计在k波段运行,因为它申请了PRIN 2017 WPT4WID项目,拨款为2017YJE9XK005。
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
CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
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