A Backward-to-Forward Beam Scanning Leaky-Wave Antenna for Non-Destructive Testing of Cracks & Corrosion in Metallic Structures under Multilayered Composites

2018 International Conference on Intelligent Rail Transportation (ICIRT) Pub Date : 2018-12-01 DOI:10.1109/ICIRT.2018.8641545

K. Chandrasekaran, M. Karim, Nasimuddin, M. Ong, A. Alphones

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Abstract

In this work, a novel backward-to-forward scanning leaky-wave antenna is characterized and validated for non-destructive testing (NDT) of cracks and corrosion in metallic structures under multilayer composites. Beamforming systems play a major role in NDT applications that involve scanning of a large target. Leaky-wave antennas are capable of scanning their main beam from backward to forward direction with change in input frequency. They are less complex to realize compared to other conventional beamforming systems that involve mechanical scanning or electronic beamforming. The proposed leaky-wave antenna that measures $7.51\lambda_{\mathrm{g}}\times0.8\lambda_{\mathrm{g}}\times0.036\lambda_{\mathrm{g}}$ with operating bandwidth extending from 8.0 to 12.5 GHz is reported in this work. The coverage of the leaky-wave antenna extends from −63° to 64°. The antenna is validated to be used for NDT application with simulation results indicating the scanning capability of the leaky-wave antenna.

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一种用于多层复合材料金属结构裂纹与腐蚀无损检测的前后波束扫描漏波天线

在这项工作中，对一种新型的后向前向扫描漏波天线进行了表征和验证，用于多层复合材料金属结构的裂纹和腐蚀的无损检测(NDT)。波束形成系统在涉及扫描大型目标的无损检测应用中起着重要作用。漏波天线能够随着输入频率的变化从反向到正向扫描其主波束。与涉及机械扫描或电子波束形成的其他传统波束形成系统相比，它们的实现不那么复杂。本文提出的漏波天线测量值为$7.51\lambda_{\mathrm{g}}\times0.8\lambda_{\mathrm{g}}\times0.036\lambda_{\mathrm{g}}$，工作带宽从8.0 GHz扩展到12.5 GHz。漏波天线的覆盖范围从−63°扩展到64°。仿真结果表明了漏波天线的扫描能力，验证了该天线可用于无损检测。

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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2018 International Conference on Intelligent Rail Transportation (ICIRT)

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