  A successful experiment combining emission and reception of gravitational
waves (GWs) would constitute a premiere of gravity control. However, such
experiments manipulating gravity would require to compactly store large amounts
of energy while using ultra-sensitive detection techniques and hence can be
expected to be very difficult to realise. In this paper, we first propose new
designs of electromagnetic (EM) generators allowing directional emission of
GWs. They are based on the resonant amplification of GWs occuring when EM
standing waves couple to an external static magnetic field. The interplay
between the EM polarizations, the orientation of the boosting magnetic field
and the emitted GW polarizations is studied, as well as the gravitational
radiation patterns of the different generators. Then, we develop a new GW
directional detection method based on magnetic energy storage. Three possible
applications are presented: (i) indirect detection of GW emission by
high-accuracy monitoring of the energy loss in the generators ; (ii) direct
detection of an incoming plane GW with a high-field magnet and (iii) GW
emission-reception experiments. Although current technology allows reaching
detection thresholds in these experiments, their practical realisation would
still need to overcome several key technical challenges.
