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79-GHz SIW slot-coupled patch antenna array with low cross polarization and wide beamwidth

Author

Listed:
  • Guan-Ren Su
  • Eric S. Li
  • Huayan Jin
  • Pei-Hsin Hsu
  • Jwo-Shiun Sun
  • Kuo-Sheng Chin

Abstract

A 79-GHz wide-beam patch antenna and 1×8 antenna array with low cross-polarization levels are presented for automotive radar applications. A substrate-integrated-waveguide slot-coupled scheme was employed to reduce the cross-polarization level of the patch antenna. Two parasitic elements were added to the main patch to form a three-element subarray for beamwidth enhancement. The simulated E-plane half-power beamwidth (HPBW) of the patch antenna is 148°, and the cross-polarization level is 32.5 dB less than the co-polarization level at the boresight direction. For further gain enhancement, a 1×8 patch array was designed and fabricated. The measured results show that the proposed design can offer a wide HPBW of 144° and a low cross-polarization level of 28.3 dB less than the co-polarization level at 79 GHz.

Suggested Citation

  • Guan-Ren Su & Eric S. Li & Huayan Jin & Pei-Hsin Hsu & Jwo-Shiun Sun & Kuo-Sheng Chin, 2023. "79-GHz SIW slot-coupled patch antenna array with low cross polarization and wide beamwidth," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 37(1), pages 38-52, January.
    • Handle: RePEc:taf:tewaxx:v:37:y:2023:i:1:p:38-52
    DOI: 10.1080/09205071.2022.2111280
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