Problems in Strip Transmission Lines
Problems in Strip Transmission Lines
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带状输电线路中的问题
DOI：
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发表时间：
1955
期刊：
影响因子：
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通讯作者：
S. Cohn
中科院分区：
文献类型：
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作者：
S. Cohn
综述了屏蔽带传输线的特性阻抗公式。从这些公式出发，导出了介质填充屏蔽带传输线的衰减与Q的近似关系式。该方法假定电流分布为无耗线，表面电阻率为无限大平面导体。虽然这种方法准确地适用于大多数其他类型的线，但在这种情况下，由于条带拐角处的假设失败，相信会出现10%量级的误差。然而，误差在使计算值保守的方向上，对于大多数实际目的，精度应该足够。现在正在尝试推导修正项。除了讨论衰减问题外，本文还讨论了屏蔽条带阻抗计的设计问题，并给出了用该装置获得的初步数据。此外，还提出了在该研究和开发计划下未来需要研究的课题。
A review is given of characteristic-impedance formulas for shielded-strip transmission lines. From these formulas a set of approximate relationships for the attenuation and Q of a dielectric-filled shielded-strip transmission line is derived. The method makes the standard assumption that the current distribution is that of a lossless line and the surface resistivity that of an infinite-plane condutor. Although this method applies accurately to most other types of lines, in this case an error of the order of 10% is believed to occur due to the failure of the assumptions at the corners of the strip. However, the error is in a direction that makes the computed values conservative, and the accuracy should be sufficient for most practical purposes. The derivation of a correction term is now being attempted. In addition to the discussion of attenuation attention is given in this paper to the design considerations involved in a shielded-strip-line impedance meter, and to some preliminary data obtained with this device. Also the future topics for investigation under this research and development program are mentioned.