摘要
为了研究影响圆盘型UHF传感器性能的因素,本文基于腔模理论,采用XFdtd软件仿真研究了圆盘电极直径、介质基片厚度、介质基片介电常数、同轴馈源位置对传感器性能的影响;建立了基于GTEM小室的等效FDTD模型,采用频域有效高度对不同馈源位置的圆盘型UHF传感器的性能进行了评价。结果表明：圆盘电极直径、介质基片厚度和介质基片介电常数的增加会使传感器的频带向频率减小的方向移动;馈源位置对传感器谐振模式的影响明显,馈源位于ρ=a/4处的传感器较馈源位于ρ=0处的传感器,在300~800 MHz频段上的平均有效高度提高了约127%。
In order to study effects of disc type UHF sensor performance factors, on the basis of the cavity model theory, we studied the effects of disc electrode diameter, medium thickness of substrate, medium substrate dielectric constant, and coaxial feed position on the performances of the sensor by using the XFdtd software.Moreover,we established an equivalent FDTD model of the GTEM cell, and evaluated the performances of disc type UHF sensor with different feed position by frequency domain effective height.The research results show that the increases in the disc electrode radius,the thickness of the medium substrate, and the permittivity of the medium will shift the working frequency band towards the reducing direction;and the feed position has an obvious influence to the resonant mode of sensor. The average effective height of 300~800 MHz band will be improved by about 127%, and the feed position will shift from ρ=0 to ρ=a/4.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第4期1245-1251,共7页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2011CB209405)~~
