摘要
针对加载物广泛用于混响室的相关实验,结合已有的理论和研究成果,通过大量实验分析其布局和数量变化对于腔室内相关参数的影响。总结混响室中概率分布、标准偏差、Q值、独立采样点数的测试与计算方法,并通过测试混响室内的场强、功率和S21参数得到相关数据和结论。通过综合分析加载物对于四个参数的影响,其放置于混响室边缘以及距离地面一定高度的加载布局要好于放置于中央地面处,且加载后对于参数的变化并非都是有益的。在进行实验时,相关参数也会随着加载物数量的变化而改变,同时过量加载会对实验本身会起到适得其反的效果。
Aimed at absorbing material is widely used in reverberation chamber related experiments, combining with the theory and the existing research results , through a large number of experiments to analyze the absorbing material layout and the number of changes on the influence of related parameters. Though test field intensity, power and the S21 of reverberation chamber , simulate and calculate the probability distributions, standard deviation, Q value and the independent sampling points when different absorbing material is loaded in different positions. When absorbing material placed in the middle of the ground , does not improve the uniformity of the chamber , and placed in the chamber interior edge or distance from the ground a certain height is helpful to improve the uniformity, The effect of the changes in layout for independent samples is not very obvious. And only the appropriate load content would improve the uniformity and the number of probability density distribution is more dose to the theoretical val- ue. For independent sampling points and the Q values, while loading different ways of lading effect is also different, and the lading quantity absorbing material will reduce its value, but needs to be controlled within a certain range.
出处
《科学技术与工程》
北大核心
2013年第19期5621-5626,共6页
Science Technology and Engineering
基金
国家自然科学基金(51277180)
国家重点实验室基金(9140C87020211JB34)资助
关键词
混响室
吸波材料S21参数
Q值
标准偏差
独立采样点数
reverberation chamber absorbers parameters of S21 standard deviation independ-ent sampling points the value of Q
