In this work, a new ultrawideband grounded coplanar waveguide (GCPW) to substrate integrated waveguide transition is presented. The proposed design improves the performance of the triangular tapered slot transition, by providing a return loss level better than 28 dB in the $X$ -band frequency range (with enhancements of up to 29 dB at higher frequencies in such a band) and a flatter response for the insertion losses. The analysis of the new transition is performed using a dielectric material with high permittivity ( ${\varepsilon _{r}=9.8}$ ), which leads to an extremely compact implementation. In order to validate the proposed design, several back-to-back transitions with different lengths were manufactured, measured, and compared with the simulated data. Further experimental results, after performing an additional thru-reflect-line calibration for deembedding undesired effects of involved connectors, are also shown.

中文翻译：

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紧凑型超宽带接地共面波导到基板集成波导锥形 V 槽过渡

在这项工作中，提出了一种新的超宽带接地共面波导 (GCPW) 到衬底集成波导的过渡。所提议的设计通过提供优于 28 dB 的回波损耗水平，提高了三角形锥形槽过渡的性能。 $X$ - 频带频率范围（在此类频带中的较高频率处增强高达 29 dB）和更平坦的插入损耗响应。新跃迁的分析使用具有高介电常数的介电材料 ( ${\varepsilon _{r}=9.8}$ )，这导致了一个非常紧凑的实现。为了验证所提出的设计，制造、测量了几个不同长度的背对背过渡，并与模拟数据进行了比较。在执行额外的直通反射线校准以去除相关连接器的不良影响后，还显示了进一步的实验结果。