Spatio-temporal modulated Doppler cloak for antenna matching at relativistic velocity

In this contribution, we present the concept of Doppler cloak applied to narrowband antennas in order to address the issue of mismatch caused by the Doppler frequency shift. Here, we consider an antenna system composed by two antennas which are moving one with respect to the other. Our preliminary results on the observed frequency by the moving receiving antenna demonstrate that, by covering the antenna with the Doppler cloak, the observed Doppler shifted signal is frequency mixed, moving the band of the propagating signal within the operative band of the receiving antenna. For an external observer, therefore, the receiving antenna turns out to be always matched, despite the experienced Doppler frequency shift, and thus its actual velocity.