In general, the invention relates to a method for processing packets. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The products are aligned by engaging elements that rotate through a slot inside of which the conveyor pushers also slide. The apparatus may limit the mechanical excursion of the exciter to prevent physical damage to the exciter.