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电梯信号场强预测是PHS(无线市话)室内分布系统设计的难点。用多重镜像法计算了矩形横截面单电梯井道内PHS信号场强,预测了不同地点的不同服务质量,并与普通镜像法比较。在电梯井道PHS场强预测中,多重镜像法优于普通镜像法。对PHS室内分布系统单电梯井道设置定向天线提出了建议。实验验证了这种方法的正确性,从而可望改善电梯内PHS通话质量。
Elevator signal field strength prediction is PHS (wireless local calls) indoor distribution system design difficulties. The multi-image method was used to calculate the field strength of PHS signal in a single hoistway with rectangular cross-section, and the different quality of service in different locations was predicted and compared with the normal image method. In the elevator shaft PHS field strength prediction, multi-mirror method is superior to ordinary mirror method. Proposed directional antenna for single elevator shaft of PHS indoor distribution system. Experiments verify the correctness of this method, which is expected to improve PHS call quality elevator.