云對通信信號傳播損耗的研究

1、云對通信信號傳播損耗的研究[摘要]分析了云的基本特性，討論了云與通信信號的相互作用機理，基于Mie散射理論，數值計算了云中球形粒子對電磁信號散射的散射特征量；結合云粒子譜分布函數，利用低空中的晴空大氣對電磁波信號傳播損耗經驗公式，數值計算了幾種常見云對電磁信號的衰減。同時基于Rayleigh散射理論，結合云對電磁波衰減系數的經驗計算公式，給出了云對電磁信號衰減的數值結果，并將所得結果與Mie散射計算的結果相比較，分析了兩者的差異，所得結

2、果可為正確理解電磁信號在云中的傳輸特性提供參考和技術支持。[關鍵詞]通信信號；傳播損耗；散射理論；衰減ResearchonthepropagationattenuationofsignalofcommunicationcausedbycloudsLeiQunXia(Grade08Class1MajelectronicinfmationsciencetechnologySchoolofPhysicsTelecommunicationEng

3、ineeringShaanxiUniversityofTechnologyHanzhong723000，Shaanxi)Tut:HuangChaoJunAbstract:AnalyzingthebasicacteristicsofcloudstheinteractionmechanicsbetweencloudssignalofcommunicationisdiscussedBasedonMiescatteringtheythescat

4、teringacteristicalquantityofsphericalparticlesincloudsactionwithelectromagicsignalarenumericalcalculated.Combiningwiththespectraldistributionfunctionofparticlesincloudsusingtheexperimentfmulaofpropagationattenuationofele

5、ctromagicsignalinlowatmosphericwithclearskytheauthnumericalcalculatingtheattenuationofelectromagicsignalcausedbyseveralcommonclouds.MeanwhilebasedonRayleighscatteringtheycombiningwiththeexperimentfmulaofattenuationcoeffi

6、cientofelectromagicwavecausedbycloudsthenumericalresultsofattenuationofelectromagicsignalcausedbycloudsaregiven.TheresultswhichcalculatedbyMietheyRayleighindividuallyarecomparedtheirdifferenceisanalyzedthiscanprovideconf

7、erencetechnologysupptfcrectunderstthepropagationacteristicsofelectromagicsignalthroughclouds.Keywds:communicationsignalspropagationattenuationscatteringtheyattenuation3.3Rayleigh散射的概念及特點..................................

8、................................233.3.1Rayleigh近似理論..........................................................................233.3.2云對電磁信號的Rayleigh近似....................................................243.4兩種理論下結果的比較....

9、.....................................................................264結語..........................................................................................................27致謝....................................

10、.........................................................................27參考文獻.....................................................................................................28附錄外文翻譯................................