Each feed is coupled to {HEAD ~ a feed network} which acts to combine {TAIL ~ the illumination beams} of a preselected number of feeds to produce a plurality of composite illumination beams each of which having a central ray 
acts to combine
Each feed is coupled to { HEAD ~ a feed network } which acts to combine { TAIL ~ the illumination beams } of a preselected number of feeds to produce a plurality of composite illumination beams each of which having a central ray
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH