Active antenna is self-phasing array which transmits signal in direction of remote pilot source. Word "active" means that transmitted power is generated by sources associated with antenna rather than by reflection of incident signal, as in passive retrodirective antenna. Array is also known as self-focusing array.
Active retrodirective antenna
NASA Tech Briefs ; 1 , 4
1977-03-01
Miscellaneous
No indication
English
Retrodirective Antenna Systems for Cubesats
AIAA | 2010
|Retrodirective Phased Array Antenna for CubeSats
IEEE | 2019
|Retrodirective modulator Patent
NTRS | 1970
|Retrodirective transponder feasibility experiment
NTRS | 1967
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