短波广播转动天线介绍.ppt

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1、THALES短波广播用转动天线概要BROADCAST&MULTIMEDIAF2Layer250-400175-25050-90110kmkmkmkmF1LayerELayerDLayerRFI17850kHz1245FrankSinatraStrangerintheNighthRFI17850kHz1245FrankSinatraStrangerintheNighthRFI17850kHz1245FrankSinatraStrangerintheNighthRFI17850kHz1245FrankSinatraS

2、trangerintheNighthRFI17850kHz1245StrangerintheNighth短波TX全波段短波接收机STUDIO短波广播通过不同电离层和地面之间一次和多次反射实现远距离的电磁波辐射成功地实现远距离覆盖通过固定的或移动接收机接收信号数字广播给短波广播新的推动力RotatableAntennaArray,Part12BROADCAST&MULTIMEDIASimpleideasbehind.....一个简单的中央竖井包含三个功能:旋转轴为天线网络提供全部的动态或静止的支撑安装ATU控制、射

3、频以及基础装置AccesstoallspecifiedfrequencybandsoftheallocatedshortwavebroadcastingrangeBack-to-backarrangementofalowbandandahighbandcurtainantenna,eachwithitsownreflectorscreenElectriccontrollogicoperatestheentirenetworkandassuresantennaisturnedinthedirectionofther

4、espectivecoverageareaovertheshortestpossiblepathRotationnevertoexceed180°;accordinglychangeovertimenevertoexceedmorethanthreeminutesfora180°rotationRotatableAntennaArray,Part13BROADCAST&MULTIMEDIASimpleideasbehind.....Smoothstartingandbrakingtostandstillwithn

5、ojoltingConstant,quickaccelerationanddelayHighrotationspeedof1degreepersecondHighpositioningaccuracyof<1degreeRetrofittoanyshortwavetransmitterforcarrierpowerlevelofupto500kWpertransmitterHighantennagainfrom18upto24dBPerfectDCgrounding,withnumberofinsulators[

6、spacer,hanger,supports]minimizedAlloperationalfunctionsmonitoredandremotecontrolledHorizontalandverticalbeamshaping(optional)throughdifferentmodesofoperation,likeAHR4/4,4/2,2/4,2/2[StandardPerformancefortheoption]RotatableAntennaArray,Part14BROADCAST&MULTIMED

7、IAshortwavebroadcastingcommonrequirementsoftheinternationalbroadcasterfamilylimitedavailablelanduseconcerningantennafieldconsiderationofradiationhazardzoneandinterferencetonear-byinstallationsshortestleadtimetostartoffoperationhighestflexibilityintermsofcover

8、ageastoactualandfuturerequirementshighestreliability,evenunder24houroperationconditiondesign,operationalandtechnicaladvantageslowesttoleranceofoutagesfullremotecontrol,fault&performancemo