The letter proposes a substrate integrated suspended line low-cost antenna with suppressed sidelobe levels for 77 GHz automotive radar. The antenna consists of two embedded air cavities. The double-layer wiring with dielectric excavation makes more electromagnetic energy distributed in the air cavity, significantly reducing the dielectric loss. The sidelobe level is decreased to −15 dB according to the Chebyshev synthesis. The measured results validate that the antenna bandwidth is from 75.01–82.12 GHz which can cover the 77 GHz application (76–81 GHz) with the max realized gain of 13.5 dBi. In addition, the antenna is fabricated on the FR4 substrates resulting in low cost.

中文翻译：

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采用 SISL 技术并具有抑制旁瓣电平的低成本天线，适用于 77 GHz 汽车雷达


该信函提出了一种用于 77 GHz 汽车雷达的具有抑制旁瓣电平的基板集成悬挂线低成本天线。该天线由两个嵌入式气腔组成。采用介质开挖的双层布线，使更多的电磁能量分布在气腔中，显着降低介质损耗。根据切比雪夫合成，旁瓣电平降低至 -15 dB。测量结果验证天线带宽为75.01-82.12 GHz，可以覆盖77 GHz应用（76-81 GHz），最大实现增益为13.5 dBi。此外，天线是在 FR4 基板上制造的，因此成本较低。