摘要
用不完全波导理论，分析了ＵＨＦ无线电波在沟道结构中的传播特性，讨论了沟道的倾斜、侧壁的吸收及表面的粗糙对传播特性的影响。结果表明，由于周围介质的吸收引起的衰减与频率的平方成反比；侧壁表面粗糙度引起的衰减与频率成反比；而侧壁倾斜引起的衰减与频率成正比；实际沟道结构的不完全性将引起电磁模式的转换，增加传播损耗。理论结果与实验数据非常一致。
UHF radio propagation characteristics in open groove structures are presented,based on the imperfect waveguide method.The results show that the attenuation caused by the surrounding media absorption is inversely proportional to square of the frequency,the attenuation caused by the roughness on the sidewalk surfaces tilt is inversely proportional,and the attenuation caused by the sidewalk tilt is proportional to the frequency.The imperfectness of the actual open groove structures will cause electromagnetic mode conversion and increase the propagation loss.The theoretical results are in agreement with experimental data.
出处
《太原理工大学学报》
CAS
1999年第1期1-5,共5页
Journal of Taiyuan University of Technology
基金
国家自然科学基金
