Field localisation using real-time phase conjugation within a reverberant environment

In this study, the authors provide experimental characterisation of the field location effects that occur within a reverberant environment. This is achieved using a single active analogue phase conjugating unit positioned within a reverberant chamber. The authors demonstrate significant spatial focusing of ON-OFF-keyed 2.4-GHz signals. Furthermore, the effect of polarisation randomisation within such environments is discussed and it is shown that the system is highly tolerant of antenna orientation and does not require line of sight for its operation.