Study antenna positioning and EM biological effects - Multiple-beam antennas, part 2

MULTIPLE BEAM array antennas were presented in Part 1 (see Microwaves & RF, August 1999, p. 59) as efficient components in high-capacity cellular-comm unications systems. Using Quick Plan(TM) cell planning software from TeS Te leinformatica e Sistemi s.r.l. (Rome, Italy), it was possible to develop ce llular-network models, which invited comparison to different antenna approa ches. Sectoring with traditional panel-antenna-based clover base-transceive r stations (BTS) was compared to sectoring with BTS using multiple-beam arr ays; computer models showed some significant advantages with the arrays. Pa rt; 2 continues this comparison, based on an area in northern Italy with. a hypothetical arrangement bf several existing (clover) BTS. Traffic is assu med to be evenly spread among the cells so that the existing frequency plan is in line with the theoretical frequency reuse pattern corresponding to t he cluster size of the system.