基于新型多模短波广播发射天线阵列的研究  

Research on Broadcast Transmitting Antenna Array Based on New Multimode Shortwave

作　　者：修阅 XIU Yue(Inner Mongolia autonomous region Radio and Television Transmission and Launch Center Hailaer 548,Hulunbuir 021000,China)

机构地区：[1]内蒙古自治区广播电视传输发射中心海拉尔548台,内蒙古呼伦贝尔021000

出　　处：《电视技术》2025年第2期133-135,139,共4页Video Engineering

摘　　要：为进一步提高广播发射范围,研究提出新型多模短波广播发射天线阵列,利用改进型宽带折叠偶极子提高信号辐射范围。实验结果表明,随着增益的增加,水平波束宽度呈现先下降后上升趋势,当增益从10 dB增加到18 dB时,水平波束宽度从90°减小到40°,而当增益为20 dB时,水平波束宽度为42°,较增益为18 dB时增加5.00%;当增益为20 dB时,垂直波束宽度为25°,较增益为10 dB时下降58.33%,但垂直波束宽度越小,天线在主瓣方向上的信号强度越强。因此,新型多模短波广播发射天线阵列,利用改进型宽带折叠偶极子,可以使信号向更大的角度范围扩散。In order to further improve the broadcasting range,this study proposes a novel multimode shortwave broadcast transmitting antenna array,which utilizes an improved broadband folded dipole to improve the signal radiation range.The experimental results show that the horizontal beamwidth shows a decreasing and then increasing trend as the gain increases,and when the gain increases from 10 dB to 18 dB,the horizontal beamwidth decreases from 90°to 40°,while when the gain is 20 dB,the horizontal beamwidth is 42°,which is an increase of 5.00%compared with the gain of 18 dB.When the gain is 20 dB,the vertical beamwidth is 25°,which is 58.33%lower than that when the gain is 10 dB,but the smaller the vertical beamwidth,the signal strength of the antenna in the direction of the main lobe is increased.Therefore,the new multimode shortwave broadcast transmitter antenna array,which utilizes an improved broadband folded dipole,can spread the signal to a wider angular range.

关 键 词：广播发射 天线阵列 折叠偶极子 波束宽度 

分 类 号：TN934.81[电子电信—信号与信息处理]