实现直达波传播的短波发射天线研究  

Research on Short-wave Antenna Using Direct Wave Propagation

作　　者：康晓乐 冯玉梅 Kang Xiaole;Feng Yumei(Radio,Film&TV Design and Research Institute Co.,Ltd.,Beijing 100045,China;Electromagnetic Environment Research and Testing Laboratory of National Radio Television Administration,Beijing 100045,China)

机构地区：[1]中广电广播电影电视设计研究院有限公司,北京100045 [2]电磁环境研究与测试国家广播电视总局实验室,北京100045

出　　处：《广播与电视技术》2025年第2期82-85,共4页Radio & TV Broadcast Engineering

摘　　要：国内小功率短波发射台普遍使用垂直极化笼形发射天线,该天线属于宽频带单极子天线,采用地波覆盖周边3公里范围的区域。而短波频段地面传播损耗较大,覆盖效率较低。针对这一问题,本文通过理论和仿真计算,论证了采用直达波覆盖的方式,可提高发射效率、改善覆盖效果,为短波直达波天线的工程应用提供了理论依据。Domestic low-power short-wave transmitting stations generally use vertically polarized cage-shaped transmitting antennas,which belong to broadband monopole antennas,and use ground waves to cover the surrounding area within 3 kilometers.However,the ground propagation loss in the short-wave frequency band is relatively large,and the coverage efficiency is low.In response to this problem,this paper demonstrates that the use of direct wave coverage can improve the transmission efficiency and coverage effect through theoretical and simulation calculations,and provides a theoretical basis for the engineering application of shortwave direct wave antennas.

关 键 词：短波 直达波 盘锥天线 

分 类 号：TN822.2[电子电信—信息与通信工程]