The sub-sea umbilical is project specific; typically of up to
30Km long and costing in excess of £1m to manufacture. It is
therefore of paramount importance to ensure the accuracy of the
predicted communications and power attenuation early in the
project decisions. A bad prediction may have cost and impose
severe future System Limitations.
Our research to date highlighted that at high frequency bands, signals are susceptible to levels of un-intentional radiated emissions. The radiation efficiencies of such PLC networks and their radiation profiles; the potential near and far field effects and any cumulative effects of their exploitation on existing and future, high frequency, wireless services have been explored. We now wish to focus our attention to sub-sea environments and to re-use spectrum over and over again on existing metallic infrastructure in order to provide cost effective, competitive, substitute to more conventional methodologies. Our objective is to achieve a further
utilization of the high frequency spectrum outside the boundaries of the 12 mile zone. This paper has offered results obtained from some of our measurements taken at CENELEC
bands and explained the present system in use by the project
sponsor. Throughout the duration of our marine and sub-sea
activities we will conduct experiments operating in close
proximity and consider high frequency spectrum re-use in
conjunction with our sponsors requirement.
