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(jī)理，基于Mie散射理論，數(shù)值計算了云中球形粒子對電磁信號散射的散射特征量；結(jié)合云粒子譜分布函數(shù)，利用低空中的晴空大氣對電磁波信號傳播損耗經(jīng)驗公式，數(shù)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(jié)合云對電磁波衰減系數(shù)的經(jīng)驗計算公式，給出了云對電磁信號衰減的數(shù)值結(jié)果，并將所得結(jié)果與Mie散射計算的結(jié)果相比較，分析了兩者的差異，所得結(jié)

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(shù)支持。[關(guān)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(diǎn)..................................

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(jié)果的比較....

9、.....................................................................264結(jié)語..........................................................................................................27致謝....................................

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