The letter demonstrates a coaxial transmission line-to-substrate integrated waveguide (CT-SIW) transition using aperture-coupling approach. The method broadens the bandwidth (BW) and reduces the transition insertion loss (IL). Two coaxial line supports with apertures for coupling are attached at the ends of substrate integrated waveguide (SIW). The copper inlaid of the apertures increases coupling of the coaxial line to SIW and can be controlled by the aperture length and the length of the line wire put in the aperture. The transition was designed, fabricated, and experimentally evaluated. The transition provides the measured 10 dB return loss (RL) fractional BW (FBW) of 104.3%, and 15 dB RL (FBW) of 78.06%. The IL of 0.37 to 0.87 dB at 19.63–62.7 GHz frequency range was obtained. The measured results are well correlated with the simulated ones.

中文翻译：

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使用孔径耦合方法的宽带同轴线到 SIW 转换

这封信演示了使用孔径耦合方法的同轴传输线到基板集成波导 (CT-SIW) 转换。该方法拓宽了带宽（BW）并降低了过渡插入损耗（IL）。两个带有耦合孔的同轴线支撑连接在衬底集成波导 (SIW) 的末端。孔的铜镶嵌增加了同轴线与SIW的耦合，并且可以通过孔的长度和放入孔中的线的长度来控制。过渡是经过设计、制造和实验评估的。转换提供了 104.3% 的测量 10 dB 回波损耗 (RL) 分数带宽 (FBW) 和 78.06% 的 15 dB RL (FBW)。在 19.63-62.7 GHz 频率范围内获得了 0.37 至 0.87 dB 的 IL。测量结果与模拟结果有很好的相关性。