This paper is a follow-up to the one presented at the 1988 Antenna Applications Symposium where an Advanced Architecture for a monopulse active aperture array was presented. This architecture exploits the potential inherent in next generation T/R modules to reduce the number of elevation beamformers from three to two. The remaining two beamformers are relatively simple networks consisting of -3.01 dB Wilkinson Power Dividers, anti-symmetric in phase. This allows for ...