On-chip antenna integration for millimeter-wave single-chip FMCW radar, providing high efficiency and isolation

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A complete functional 60-GHz BiCMOS single-chip millimeter-wave frequency-modulated continuous wave (FMCW) radar with on-chip integrated antennas is designed, realized, and experimentally validated. The chip is configured with one transmitting and two receiving antennas. A high antenna efficiency and isolation between the transmitting and receiving antennas is achieved by using a cavity-backed on-chip monopole and by optimizing the package environment. Surface-wave losses and back radiation are reduced, and a high antenna gain is obtained with small ripples in the antenna pattern by implementing special structures on the PCB of the integrated circuit package. The experimental results from the single-chip radar show that the on-chip antennas provide a gain of 2 dBi with very low back radiation. The realized antennas achieve an impedance bandwidth of more than 50% with a corresponding simulated efficiency of 45%. In addition, the proposed approach suppresses surface waves and meets the specific FMCW radar requirements, such as a more than 25-dB isolation between the transmitting and receiving antennas.

Original languageEnglish
Article number7471462
Pages (from-to)3281-3291
Number of pages11
JournalIEEE Transactions on Antennas and Propagation
Issue number8
Publication statusPublished - 1 Aug 2016



  • Antenna efficiency
  • cavity-backed on-chip monopole (CBOM)
  • isolation
  • millimeter-wave (mm-wave)
  • surface waves

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