Abstract
This paper presents a cavity-backed slot (CBS) antenna for millimeter-wave applications. The cavity of the antenna is fully filled by polymer material. This filling makes the fabrication of a silicon CBS antenna feasible, reduces the cavity size by 76.8%, and also maintains the inherent high-gain and wide bandwidth. In addition, a through-silicon via-based architecture is proposed to integrate the 135-GHz CBS antenna with active circuits for a complete system-in-package. Results show that the proposed structure not only reduces the footprint size but also suppresses the electromagnetic interference.
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