Progress on Ultra-Wideband (UWB) Multi-Antenna radar imaging for MIGA

Matthew Yedlin,Kevin Hall,David Henley,Stéphane Gaffet,Jean-Yves Dauvignac,Christian Pichot,Raul Cova,Nicolas Fortino,K Coulié,G Micolau,P Febvre

doi:10.1051/e3sconf/20161201001

Abstract

Progress on the development of the multi-channel, ground penetrating radar imaging system is presented from hardware and software perspectives. A new exponentially tapered slot antenna, with an operating bandwidth from 100 MHz to 1.5 GHz was fabricated and tested using the eight-port vector network analyzer, designed by Rhode and Schwarz Incorporated for this imaging project. An eight element antenna array mounted on two carts with automatic motor drive, was designed for optimal common midpoint (CMP) data acquisition. Data acquisition scenarios were tested using the acoustic version of the NORSAR2D seismic ray-tracing software. This package enables the synthesis and analysis of multi-channel, multi-offset data acquisitions comprising more than a hundred thousand traces. Preliminary processing is in good agreement with published bistatic ground-penetrating radar images obtained in the tunnels of the Low-noise Underground Laboratory (LSBB) at Rustrel, France.

Highlights

The universities of Avignon, Nice Sophia Antipolis, British Columbia and Calgary are constructing a multi-channel ground-penetrating radar(gpr) imaging system to support the Matter-wave laser Interferometric Gravitation Antenna (MIGA) project
We have presented the current progress in the development of an 8 element ground penetrating radar antenna array composed of novel, compact ultra-wideband antennas
Data acquisition is achieved by using the Rhode Schwarz Incorporated ZVT vector network analyzer, with an attached eight channel shielded amplifier, designed for this radar imaging project

Summary

Introduction

The universities of Avignon, Nice Sophia Antipolis, British Columbia and Calgary are constructing a multi-channel ground-penetrating radar(gpr) imaging system to support the Matter-wave laser Interferometric Gravitation Antenna (MIGA) project. This system is based on ANR Maxwell, a prototype funded by the ANR. Our research focuses on the design and construction of an 8 element ultra-wideband antenna array. Preliminary raytracing models of data to be collected by this new system match the images obtained by Sénéchal et al [1]. C The Authors, published by EDP Sciences.

Antenna development

Imaging system progress – synthetic image simulation at LSBB

Case study

Conclusions