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Advanced Antennas for Radio Base Stations 133
Figure 4.1 Three-sector cell plans: (a) site positions, (b) omnidirectional antennas, (c) Bell
cell plan with 90° (but, in general, arbitrary) HPBW antennas, (d) Ericsson cell plan with
45° HPBW antennas, (e) Ericsson cell plan with 65° HPBW antennas, and (f) Ericsson
cell plan with 90° HPBW antennas. The cell corresponding to one antenna is indicated
by the shaded area. Dots indicate the locations of the base stations and line stubs show
the antenna main beam pointing directions.
