负载tem波导的时域反射表征

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI:10.1109/ISEMC.1999.812881

J.P. Karst, H. Garbe

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引用次数: 5

摘要

提出了一种利用时域反射法(TDR)测量得到的局部特性阻抗Z/sub c/(Z)来表征tem波导负载状态的方法。利用空tem波导与预期Z/sub /=50 /spl ω /的偏差，可以估计场均匀性和场极化。仅考虑tem模式下的波传播，导出了载荷状态与特性阻抗之间的解析关系。考虑了负载tem波导非均匀性引起的多重反射和负载激发的高阶模态。用gtem电池进行了几种负载状态的实验。

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Characterization of loaded TEM-waveguides using time-domain reflectometry

An approach is presented to characterize the load state of a TEM-waveguide using the local characteristic impedance Z/sub c/(z) derived from time-domain reflectometry (TDR) measurements. The field homogeneity and the field polarization can be estimated using the deviation from the intended Z/sub c/=50 /spl Omega/ of the empty TEM-waveguide. Considering wave propagation only in the TEM-mode an analytical relationship between load state and characteristic impedance is derived. Multiple reflections due to the nonuniformity of the loaded TEM-waveguide and higher order modes excited by the load are taken into account. Experimental results are presented using a GTEM-cell with several load states.

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来源期刊

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)

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