Circularly polarised antenna requirements within a reverberant phase conjugation communication system

Phase conjugation systems operated in highly reverberation environments have recently been shown to be highly advantageous in advanced microwave radio systems where automatic multipath mitigation and spatially dense multi-user access are primary system drivers. The channel response due to circularly polarised (CP) dipole antennas at 2.4 GHz are investigated when placed within a reverberation chamber which contains phase conjugating electronics. We observe that with such an arrangement is insensitive to CP polarisation sense, i.e. the normal free space requirements for CP polarisation matching do not apply. Furthermore we show that that significant processing gain occurs when the signal is passed through a single phase conjugation unit, positioned within the chamber, due to spatial and temporal compression.