Near-field coupling in wireless systems

The analysis of the near-field coupling between closely spaced antennas has attracted a lot of attention since decades ago. Most of the research work is about array antennas, where the interest is on the techniques for reducing the coupling level between adjacent radiating elements, or for developing advanced array synthesis methods that are able to account for the coupling phenomena. Near-field coupling is also of interest in the design of multiantenna platforms, such for example antennas operating on a satellite or a car, at different frequencies and for different applications. Further areas where near-field coupling has attracted attention are electromagnetic compatibility problems, design of near-field scanning probes, optimization of near-field to far-field (NF-FF) antenna measurement systems, development of effective and accurate numerical techniques, as well as approximate analytical models, for the coupling analysis.