Active Circular Retro-Directive Array

Retro-directive arrays provide retransmission of signals back toward their source direction without prior knowledge of the source location. In this paper, we explore the use of an active circular retro-directive array for up to 360° retro-directive monostatic coverage. We also show by selectively choosing which bank of array elements are to be conjugated how we can control sectoral retro-directive coverage. The simulated and experimental results are provided for a 16-dipole element active circular retro-directive array at 2.4 GHz.