A dual frequency, active retrodirective array for wideband wireless charging of portable devices uses a wideband circularly polarized microstrip patch antenna array with sequential rotation and surface wave suppression. The retrodirective array operates at 2.4 GHz for the interrogating signal and over a wide band (5.8 to 6 GHz) for the retransmitted signal using up-converting mixers. Beam scanning inherent in retrodirective arrays ensures a constant power level available to the charging devices, regardless of location over a 50 degree angular sector of retrodirectivity.
|Specialist publication||Microwave Journal|
|State||Published - Jul 2020|