Retro-transceiver array using monopole antennas

In this paper, we show how a self-tracking antenna array constructed using gimel /4 monopoles can be constructed, which is capable of receiving with g ain over an entire 360 degrees azimuthal cut. It is also shown how the self -tacking receive unit can be used in conjunction with a self-phased transmi tter so that self-steered spatially selective receive and transmit function s ran be formed simultaneously. The resulting array is capable of maintaini ng spatially selective receive and transmit functions to a roaming target w ithout prior knowledge of its physical location.