A system using an energy beam to expose patterns on a wafer includes first mirror elements, a multiplexer element, and second mirror elements. The snorkel includes an arching breathing tube with a mouthpiece at a first end and a breathing port at a second end. Another control gate electrode is formed on the other face of the channel region, with yet another insulating film being interposed in between. A lip may extend from the base opposite the sides, and may have indentions therein. In so doing the antenna weight selection solution disclosed herein reduces the channel variability associated with data transmissions, and therefore reduces the amount of feedback andor the feedback rates required for the multiple antenna communication system.