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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。
With the incomplete wave theory, the propagation characteristics of UHF radio waves in the channel structure are analyzed. The effects of channel tilt, absorption of the sidewalls and surface roughness on the propagation characteristics are discussed. The results show that the attenuation caused by the absorption of the surrounding medium is inversely proportional to the square of the frequency. The attenuation caused by the roughness of the sidewall surface is inversely proportional to the frequency. The attenuation due to the sidewall tilt is proportional to the frequency. The actual channel structure is incomplete Sex will cause electromagnetic mode conversion, increase propagation loss. The theoretical results are in good agreement with the experimental data.