Modulated corner reflector using frequency selective surfaces for FMCW radar applications

2015 European Microwave Conference (EuMC) Pub Date : 2015-12-03 DOI:10.1109/EUMC.2015.7345712

A. Lázaro, J. Lorenzo, R. Villarino, D. Girbau

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引用次数: 7

Abstract

This work describes a modulated transponder based on a corner reflector where at least one of the metallic surfaces is replaced by an actively-controlled frequency selective surface (FSS) loaded with switching PIN diodes. The reflectivity of the faces loaded with the FSS changes with the bias of the diodes modulating the radar cross-section of the corner. The transponder therefore answers the reader, modulating the backscattered field. In addition, the retrodirectivity property of corner reflectors enables the response to be distinguished from the interference of non-modulated clutter reducing multipath effects. This approach allows high values of backscattered fields to be obtained over large angle beam widths and frequency bandwidths. An experimental setup based on a commercial X-band FMCW radar is used to measure the transponders. Experimental results obtained for a dihedral corner reflector and a cross reflector transponder at several distances are provided. In the first case, a sectorial angular coverage is obtained, whereas in the second case a quasi-onmidirectional performance is obtained.

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使用频率选择表面的调制角反射器用于FMCW雷达应用

这项工作描述了一种基于角反射器的调制转发器，其中至少一个金属表面被装载开关PIN二极管的主动控制频率选择表面(FSS)取代。装载FSS的面的反射率随调制转角雷达截面的二极管的偏压而变化。应答器因此应答阅读器，调制反向散射场。此外，角反射器的反向特性使其响应能够与非调制杂波的干扰区分开来，从而减少了多径效应。这种方法允许在大角度波束宽度和频率带宽下获得高值的后向散射场。基于商用x波段FMCW雷达的实验装置对应答器进行了测量。给出了二面体角反射器和交叉反射器应答器在不同距离上的实验结果。在第一种情况下，获得扇区角覆盖，而在第二种情况下，获得准定向性能。

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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2015 European Microwave Conference (EuMC)

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