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小区域网提高了移动无线电通信的频带利用率。在已知的系统概念中,每个小区域均需要一个基地台,这就使得基地台和传输线路的建造和维护费用很大。在60°扇形小区域网内,一个基地台可供七个小区域之用。这样,只需要建造20%的基地台就够了。人们已提出一个频率分配计划;根据此计划,规定了基地台天线所需的方向图在固定的有用信号与无用信号比值下和在固定的通信区重叠下使用,给出了满足这些技术条件的
Small area networks improve the band utilization of mobile radios. In the known system concept, a base station is required for each small area, which makes the construction and maintenance of base stations and transmission lines costly. In a 60 ° fan-shaped small area network, a base station is available for seven small areas. In this way, only 20% of the base stations need to build enough. A frequency allocation plan has been proposed; according to this plan, the required directivity pattern of the base station antenna is used under a fixed ratio of wanted to unwanted signals and over a fixed communication zone, giving the conditions that satisfy these technical conditions