UWB Antennas Beamforming Using Passive Time-Reversal Device

Author

Carsenat, David ; Decroze, Cyril

Author_Institution

XLIM Res. Inst., Univ. of Limoges, Limoges, France

Volume

11

fYear

2012

fDate

7/4/1905 12:00:00 AM

Firstpage

779

Lastpage

782

Abstract

In this letter, the feasibility of a new concept of passive antenna beamformer is investigated. The main idea is to develop a (1×N)-ports device in which the weightings on output ports are applied by time-reversal operation. The control of antennas weightings is then contained in the input waveform without the need of active components or external control signals. This approach is validated experimentally by radiation pattern measurement of a four-Vivaldi-antennas array, associated to a small reverberation cell beamformer. Finally, this concept is applied to realize a passive ultrawideband (UWB) phased-array radar for target imaging.

Keywords

antenna arrays; antenna radiation patterns; array signal processing; ultra wideband antennas; UWB antenna beamforming; UWB phased-array radar; antennas weightings; four-Vivaldi-antennas array; input waveform; passive antenna beamformer; passive time-reversal device; passive ultrawideband phased-array radar; radiation pattern measurement; reverberation cell beamformer; target imaging; time-reversal operation; Antenna arrays; Antenna measurements; Antenna radiation patterns; Arrays; Radar imaging; Reverberation; Ultra wideband antennas; Antenna array; beamforming; time reversal (TR); ultrawideband (UWB) radar;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2012.2207872

Filename

6235992