YNAO OpenIR  > 射电天文研究组
Alternative TitleSimulation of the Influence of Ground Screen Parameters on Antenna Radiation Performance in VHF Band
袁晓伟1,2; 董亮1; 汪敏1; 郭少杰1; 段顺美3
Source Publication天文研究与技术(Astronomical Research & Technology)
Contribution Rank第1完成单位
Indexed ByCSCD
Keyword地网 偶极子天线 辐射系数 增益

基于VHF频段射电天文干涉阵列的天线,研究地网以及不同环境对天线辐射特性包括增益、方向图、谐振点等参数的影响。结果表明,无地网条件下,天线在干燥土壤和沙地的增益分别是3.06 dB和1.44 dB,且存在明显的旁瓣和后瓣;天线在潮湿土壤和沙地的增益分别是4.33 dB和4.25 dB。增加地网后,天线在干燥土壤和沙地的增益分别是4.87 dB和4.97 dB,潮湿土壤和沙地分别是4.39 dB和4.40 dB,方向图不存在明显的后瓣和旁瓣,谐振点稳定在27.0 MHz和69.5 MHz处,且在此之间的频段上,驻波比均满足银河噪声限制条件。由此可以得出结论:在干燥土壤和沙地上铺设地网时,VHF天线性能最好,噪声最低,这对大规模的VHF天线阵列的基础构建环境选择至关重要。

Other Abstract

This paper takes the VHF band radio interference array antenna as an example to study the influences of different grounds on antenna gains, patterns and resonances. The results show that the antenna gains on the dry soil and sand are 3.06dB and 1.44dB, and there are obvious side and back lobes in pattern.On the wet soil and sand are 4. 33dB and 4.25dB. In four cases, the reflection coefficients at each resonance point are different although there are dual-frequency resonance characteristics. After setting the ground screen, the gains of the antenna on dry soil and sand are increased to 4.87dB and 4.97dB, and the wet soil and sand are 4. 39dB and 4. 40dB, the patterns do not have obvious side and back lobes, the resonance points are stable at 27.0MHz and 69.5MHz, in this band the standing wave ratio satisfies the galaxy noise-limit condition. It is concluded that the VHF antenna has the best performance when setting ground screen on dry soil and sand. This is important for the selection of the building environment for large-scale VHF antenna arrays.

Funding Project云南省应用基础研究计划[2015FB189] ; 西部之光A类人才计划 ; 中国气象局空间天气重点开放实验室开放课题 ; 国家自然科学基金[41764007] ; 国家自然科学天文联合基金[U1831201]
Funding Organization云南省应用基础研究计划[2015FB189] ; 西部之光A类人才计划 ; 中国气象局空间天气重点开放实验室开放课题 ; 国家自然科学基金[41764007] ; 国家自然科学天文联合基金[U1831201]
Subject Area射电天文学
MOST Discipline Catalogue理学::天文学
Citation statistics
Document Type期刊论文
Affiliation1.中国科学院云南天文台, 云南, 昆明, 650011
2.中国科学院大学, 北京, 100049
3.昆明市科技型中小企业技术创新基金管理中心 ,云南, 昆明, 650106
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
袁晓伟,董亮,汪敏,等. 地网对VHF天线性能影响的分析研究[J]. 天文研究与技术(Astronomical Research & Technology),2019,16(2):178-186.
APA 袁晓伟,董亮,汪敏,郭少杰,&段顺美.(2019).地网对VHF天线性能影响的分析研究.天文研究与技术(Astronomical Research & Technology),16(2),178-186.
MLA 袁晓伟,et al."地网对VHF天线性能影响的分析研究".天文研究与技术(Astronomical Research & Technology) 16.2(2019):178-186.
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