Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Design of 60-GHz Back-to-back Differential Patch Antenna on Silicon Substrate

  • Deokgi Kim (Seoul National University of Science and Technology) ;
  • Juhyeong Seo (Seoul National University of Science and Technology) ;
  • Seungmin Ryu (Seoul National University of Science and Technology) ;
  • Sangyoon Lee (Seoul National University of Science and Technology) ;
  • JaeHyun Noh (Seoul National University of Science and Technology) ;
  • Byeongju Kang (Seoul National University of Science and Technology) ;
  • Donghyuk Jung (Seoul National University of Science and Technology) ;
  • Sarah Eunkyung Kim (Seoul National University of Science and Technology) ;
  • Dongha Shim (Seoul National University of Science and Technology)
  • Received : 2023.12.03
  • Accepted : 2023.12.19
  • Published : 2023.12.31
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Abstract

This paper presents a novel design of a differential patch antenna for 60-GHz millimeter-wave applications. The design process of the back-to-back (BTB) patch antenna is based on the conventional single-patch antenna. The initial design of the BTB patch antenna (Type-I) has a patch size of 0.66 × 0.98 mm2 and a substrate size of 0.99 × 1.48 mm2. It has a gain of 1.83 dBi and an efficiency of 94.4% with an omni-directional radiation pattern. A 0.4 mm-thick high-resistivity silicon (HRS) is employed for the substrate of the BTB patch antenna. The proposed antenna is further analyzed to investigate the effect of substrate size and resistivity. As the substrate resistivity decreases, the gain and efficiency degrade due to the substrate loss. As the substrate (HRS) size decreases approaching the patch size, the resonant frequency increases with a higher gain and efficiency. The BTB patch antenna has optimal performances when the substrate size matches the patch size on the HRS substrate (Type-II). The antenna is redesigned to have a patch size of 0.81 × 1.18 mm2 on the HRS substrate in the same size. It has an efficiency of 94.9% and a gain of 1.97 dBi at the resonant frequency of 60 GHz with an omni-directional radiation pattern. Compared to the initial design of the BTB patch antenna (Type-I), the optimal BTB patch antenna (Type-II) has a slightly higher efficiency and gain with a considerable reduction in antenna area by 34.8%.

Keywords

Acknowledgement

This research was supported by Korea Institute for Advancement of Technology(KIAT) grant funded by the Korea Government(MOTIE) (P0008458, HRD Program for Industrial Innovation), The EDA tool was supported by the IC Design Education Center.

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