曲线形槽波导传输特性的分析

为了研究新型毫米波与亚毫米波传输线及其实际应用，根据横向谐振阶梯近似等效网络法对几种曲线形槽波导的传输特性进行了分析。结果表明，各种曲线形槽波导的色散很小，且其色散特性与折线形槽波导相似，槽区的形状对其色散特性影响不大。在一定条件下，主模的带宽与槽区面积成正比，而平板区的横向长度与槽区面积成反比。此外，还给出了计算平板区横向长度的理论公式。这些新型开放式曲线形槽波导可用于传输毫米波与亚毫米波，也可

Analysis of Transmission Characteristics of Curve Shaped Groove Waveguides

In order to study new types of millimeter and submillimeter wave transmission line and their actual applications, the transmission characteristics of several kinds of the curve shaped groove waveguides are analyzed on the basis of equivalent network method with transverse resonance and step approximation. The results show that the dispersion of the curve shaped groove waveguides is very little and their dispersion characteristics are similar to those of the broken line shaped groove waveguides and that the shapes of the groove regions have less influences on the dispersion characteristics of the curve groove waveguides. Under given conditions, the band width of the dominant mode is directly proportional to the area of the groove region and the transverse length of the parallel plate region is inversely proportional to the area of the groove region. Moreover, the theoretical formula for calculating the transverse length of the parallel plate region is also given. New types of open curve shaped groove waveguides can be applied to the transmission of millimeter waves, submillimeter waves and microwave sensors in automatic measurements.