Initial assessment of a waveguide with dielectric-filled corrugations as a technology for slot antennas with backward-to-forward scanning capabilities

Metamaterials Pub Date : 2009-11-01 DOI:10.1016/j.metmat.2009.07.004

M. Navarro-Tapia , J. Esteban , C. Camacho-Peñalosa

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引用次数: 11

Abstract

The frequency-scanning capabilities of continuous-type leaky-wave antennas have usually been restricted to main-beam pointing angles within the forward quadrant. With the appearance of metamaterial concepts, wave propagation with negative and zero phase constant has made it possible to spread the scanning directions, allowing main-beam angles into the backward quadrant, as well as the broadside direction. In this paper, a straight long slot antenna, implemented in a rectangular waveguide with dielectric-filled corrugations, is analyzed, constructed and measured, and an analysis method, based on an equivalent homogeneized waveguide, is proposed. Some features of the antenna, such as losses, radiation pattern and gain are studied, in order to assess the performance and suitability of the composite right/left-handed waveguide technology used. The obtained results highlight the limiting factors for the applicability of the corrugated waveguide in antenna applications, while confirm the validity of the analysis technique proposed.

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具有后向扫描能力的缝隙天线用介质填充波波导技术的初步评估

连续型漏波天线的频率扫描能力通常局限于前象限内的主波束指向角。随着超材料概念的出现，负相位常数和零相位常数的波传播使得扫描方向的扩展成为可能，使得主波束角可以进入后象限，也可以进入宽方向。本文分析、构造和测量了一种在具有介质填充波纹的矩形波导中实现的直长槽天线，并提出了一种基于等效均匀波导的分析方法。研究了天线的损耗、辐射方向图和增益等特性，以评估所采用的复合左右波导技术的性能和适用性。所得结果突出了波纹波导在天线应用中适用性的限制因素，同时证实了所提出的分析技术的有效性。

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Metamaterials

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