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Passive compression technique applied to UWB beamforming and imaging architectures

Published online by Cambridge University Press:  21 March 2016

Thomas Fromenteze ,
Ettien L. Kpré ,
Cyril Decroze  and
David Carsenat
Thomas Fromenteze*
Affiliation:
XLIM – CNRS 123, Avenue Albert Thomas, 87060 Limoges Cedex, France
Ettien L. Kpré
Affiliation:
XLIM – CNRS 123, Avenue Albert Thomas, 87060 Limoges Cedex, France
Cyril Decroze
Affiliation:
XLIM – CNRS 123, Avenue Albert Thomas, 87060 Limoges Cedex, France
David Carsenat
Affiliation:
XLIM – CNRS 123, Avenue Albert Thomas, 87060 Limoges Cedex, France
*
Corresponding author:T. Fromenteze Email: [email protected]
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Abstract

Recent works have demonstrated the feasibility of microwave imaging using compressive techniques, exempting the use of active delay lines, phase shifters, or moving parts to achieve beamforming. With this method, waves are coded in a passive way by a compressive device to reduce the complexity of the transmitter and/or receiver chains of the telecommunication and radar systems requiring beamsteering. Such a technique is based on the exploitation of the frequency diversity, implying that a reduction of the compressive device's volume imposes a diminution of the number of driven antennas. In this paper, the improvement brought by simultaneous excitations of the compressive device is presented. Adapting a new mathematical formulation, it is shown that M inputs can send independent waveforms allowing the beamsteering of an N-elements antenna array, while maintaining N > M.

Keywords

Radar applicationsWave propagation and scattering: modelling and measurements
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Special Issue 4-5: EuMW 2015 Special Issue , June 2016 , pp. 815 - 823
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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References

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