中国铁道科学2017，Vol.38Issue(3)：110-115,6.DOI:10.3969/j.issn.1001-4632.2017.03.16
加装屏蔽板后应答器传输模块天线性能的研究
Study on the Performance of Balise Transmission Module Antenna after Adding Shielding Plate
摘要
Abstract
To protect the antenna unit of Balise Transmission Module (BTM) from being damaged by ballast and minimizing the interference of complex electromagnetic environment underneath the car on BTM antenna,steel shielding plates were installed around BTM antenna.Through theoretical calculation and computer simulation,the return loss of BTM antenna and the relationship between frequencies were analyzed under different heights of shielding plates and different horizontal distances from BTM antenna.The height of shielding plate was 150 mm,and the horizontal distance from BTM antenna was 100 mm.Based on the Biot Savart law,the magnetic field strength of BTM antenna was calculated,the distribution of the magnetic field intensity of BTM antenna and the attenuation of interference signal were simulated.Results show that the installation of shielding plates not only does not affect the signal transmission performance of BTM antenna,but also increases the effective communication range of the antenna and the attenuation of interference signal to a certain extent.The signal to noise ratio of the received signal is improved and the bit error rate is reduced.The results of the real vehicle test on BTM antenna with shielding plates also show that the shielding plates designed not only can protect BTM antenna,but also ensure the normal signal transmission of BTM antenna.关键词
应答器传输模块/天线防护/金属屏蔽板/信号传输/回波损耗/磁场强度Key words
Balise transmission module/Antenna protection/Metal shielding plate/Signal transmission/Return Loss/Magnetic field intensity分类
交通工程引用本文复制引用
徐宁..加装屏蔽板后应答器传输模块天线性能的研究[J].中国铁道科学,2017,38(3):110-115,6.基金项目
中国铁路总公司科技研究开发计划重大项目(2012X001) （2012X001）
