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Article | REF: TE6706 V1

Ultra-wideband radars - Electromagnetic short range detection

Authors: Michèle LALANDE, Joël ANDRIEU

Publication date: February 10, 2013 | Lire en français

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    Overview

    ABSTRACT

    Radar systems are differentiated in particular by the emitted frequencies. The characteristics of the band covered by ultra-wideband radars (UWB) are specified. The various architectures of UWB radars are presented and their principal characteristics compared. Varying kinds of information can be collected by such radars, such as the location or identification of a target. These points are approached within the framework of diverse applications of short-range radars.

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    AUTHORS

    • Michèle LALANDE: Doctorate in Electronics - XLIM – UMR CNRS no. 7252 - Professor at the University of Limoges

    • Joël ANDRIEU: Doctorate in Electronics - XLIM – UMR CNRS no. 7252 - Professor at the University of Limoges

     INTRODUCTION

    Ultra wideband (ULB) is a technique based on the generation, propagation or radiation of signals with a very broad spectrum (greater than one decade). Radar (RAdio Detection And Ranging) is equipment that emits and receives electromagnetic waves, used to locate objects in space in terms of distance and direction. Such instruments not only indicate the presence and distance of a distant object. They can also determine its size, shape, speed and trajectory.

    Compared with narrowband signals, the potential advantages of using ULB waveforms for radar are :

    • better spatial resolution;

    • penetration of opaque media (particularly if the lower frequencies of the spectrum do not exceed a few hundred Megahertz);

    • easier target recognition;

    • a lower probability of interception.

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    KEYWORDS

    ultra wilde band radar   |   imaging   |   civil and military radiosurveillance   |   detection   |   radar   |   electronics   |   electromagnetism

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