Wideband properties of space-fed overlapped subarray feeds

Narrowband space-fed (lens) scanning arrays have played a major role in many military and commercial applications. Space-fed arrays with incorporated time delay have not found many ready applications because of network losses, complexity, and more recently because of a perceived incompatibility with active solid state module technology. This paper demonstrates that a feed array with transmit/receive (T/R) modules can in some cases accommodate wideband radiation with efficient use of the active sources.