A $V$ -band substrate integrated coaxial line (SICL) to rectangular waveguide (RWG) transition is proposed in this letter. In this design, a folded dipole is used to achieve a more compact structure and better impedance matching in the operating band. Compared with other transitions based on single-layer substrates, this design is more suitable for mixed multilayer circuits. For verification, a back-to-back transition prototype is fabricated by standard multilayer printed circuit boards processing and measured. The measured results show that the proposed transition has a wide −10-dB impedance bandwidth of 40% (from 50 to 75 GHz), and an insertion loss of lower than 4 dB over the operating bandwidth. Owing to compact size and wide operating bandwidth, the proposed transition is valuable to advanced millimeter-wave (mmW) circuit systems.

中文翻译：

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用于 V 波段多层平面电路应用的宽带 SICL 到波导转换

一个 $V$ 在这封信中提出了波段衬底集成同轴线 (SICL) 到矩形波导 (RWG) 的过渡。在本设计中，使用折叠偶极子来实现更紧凑的结构和更好的工作频段阻抗匹配。与其他基于单层基板的过渡相比，这种设计更适合混合多层电路。为了验证，通过标准多层印刷电路板加工和测量制造背靠背转换原型。测量结果表明，所提出的过渡具有 40%（从 50 到 75 GHz）的宽 -10-dB 阻抗带宽，并且在工作带宽上的插入损耗低于 4 dB。由于紧凑的尺寸和宽的工作带宽，所提出的过渡对于先进的毫米波 (mmW) 电路系统很有价值。