摘要
针对某些小功率短波发射台的定向覆盖需求,本文在原有全向天线基础上,创造性地提出了定向天线改造方案。为了尽可能维持原有场地布局,利用原有天线结构,降低改造成本,考虑通过加载反射器的方式改造原有全向小功率短波发射天线为定向天线。对改造后的定向天线进行实地架设,并对天线驻波比和方向图进行测试,验证了仿真结果的准确性,同时对覆盖场强进行测试,验证了改造后天线的定向效果。
In view of the directional coverage requirements of some low-power short-wave transmitting stations,this paper creatively proposes a directional antenna transformation scheme based on the original omnidirectional antenna.To maintain the original site layout as much as possible,use the original antenna structure,and reduce the cost of renovation,it is considered to transform the original omnidirectional low-power short-wave transmitting antenna into a directional antenna by loading a reflector.The modified directional antenna is erected on the spot,and the standing wave ratio and pattern of the antenna are tested to verify the accuracy of the simulation results.At the same time,the coverage field strength is tested to verify the directional effect of the modified antenna.
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,NRTA,Beijing 100045,China)
出处
《广播与电视技术》
2023年第9期98-102,共5页
Radio & TV Broadcast Engineering
关键词
笼形天线
定向改造
天线测试
Cage antenna
Directional transformation
Antenna measurement
作者简介
第一作者:康晓乐(1987-),女,中广电广播电影电视设计研究院,博士。主要从事广播电视天线、电磁环境影响评价方面的研究,曾参与过小功率短波多频发射系统覆盖优化、新型小功率短波发射天线预研究、小功率中波多频发射系统研究等项目。
