Low profile broadband substrate-integrated waveguide to rectangular waveguide (RWG) transitions have been proposed for RF verification of W-band automotive radar. The transition is designed on a PCB, which is assembled between the radar board and instrument waveguide port. In the design of the transition, a magnetoelectric (ME) dipole is introduced to excite the basic mode of RWG, and a bowtie slot is designed to excite the ME dipole with a broadband performance. The measured frequency band of back-to-back transitions is 68.4–85.3 GHz for a 5 mil RO3003 covered multilayer radar board and 68.6–89.3 GHz for a 10 mil RO3003 covered board, respectively. The calibrated single transition loss is 0.58 and 0.33 dB, respectively. The proposed low profile transitions are robust to assembly errors and convenient for fast RF verification of automotive front-end in the design stage.

中文翻译：

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用于 W 波段汽车雷达的低剖面宽带基板集成波导到矩形波导的过渡

低剖面宽带基板集成波导到矩形波导 (RWG) 的转换已被提议用于 W 波段汽车雷达的射频验证。过渡设计在 PCB 上，该 PCB 组装在雷达板和仪器波导端口之间。在过渡设计中，引入了磁电（ME）偶极子来激发RWG的基本模式，并设计了领结槽来激发具有宽带性能的ME偶极子。5 mil RO3003 覆盖的多层雷达板的背靠背转换的测量频带分别为 68.4–85.3 GHz 和 10 mil RO3003 覆盖的板的 68.6–89.3 GHz。校准后的单次转换损耗分别为 0.58 和 0.33 dB。