Retro-transceiver array using monopole antennas

In this paper, we show how a self-tracking antenna array constructed using /spl lambda//4 monopoles can be constructed, which is capable of receiving with gain over an entire 360/spl deg/ azimuthal cut. It is also shown how the self-tracking receive unit can be used in conjunction with a self-phased transmitter so that self-steered spatially selective receive and transmit functions can be formed simultaneously. The resulting array is capable of maintaining spatially selective receive and transmit functions to a roaming target without prior knowledge of its physical location.