The present invention relates to a doped vanadium dioxide powder, a dispersion, and preparation methods and applications therefor. The replication server performs three distinct forms of processing using staging queues: packet arrival processing, packet replication processing, and per-interface transmission processing. Those antenna element ends of two adjacent antenna element devices located adjacent to one another in pairs form feed points, and the antenna element devices are fed at least approximately in phase and approximately symmetrically between the respective opposite feed points.