港珠澳大桥调频广播覆盖场强的计算分析

Analysis of FM Radio Coverage Field Strength on Hongkong-Zhuhai-Macao Bridge

港珠澳大桥开通后,桥面存在巨大的调频广播收听需求。本文分析了大桥地理位置和目前广播信号的覆盖现状,通过ITU-R P.1546-5预测模型,选取珠海船底山发射台调频广播信号的一个频率,详细叙述计算其在大桥的预测场强值,并利用计算结果和简单的收测数据,分析了该发射台的5个调频广播信号的覆盖状况,同时结合实际工作,提出了调整发射机功率的建议。

After the opening of Hongkong-Zhuhai-Macao Bridge, there is a huge requirement of FM radio on the bridge. This paper analyzes the geographical position of the bridge and the current coverage of the broadcasting signal. Through the ITU-R P.1546-5 prediction model, it selects a frequency of the FM broadcasting signal at Zhuhai Chuandishan transmitting station, introduces the calculation of predicted field strength on the bridge in detail. Through the calculation results and simple test data, it analyzes the coverage of five FM broadcasting signals from this transmitting station. And at the same time, combining with practical work, it proposes suggestions of transmitter power adjustment.