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A single-antenna w-band FMCW radar front-end utilizing adaptive leakage cancellation

Kalantari, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1109/ISSCC19947.2020.9063129
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2020
  4. Abstract:
  5. Millimeter-wave radars are essential for automotive sensing, medical imaging, and safety- monitoring applications. Among different architectures, frequency-modulated continuous-wave (FMCW) radars are particularly suited for miniature integration targeting portable consumer applications with detection ranges up to a few tens of meters. This translates to a relatively low requirement of transmitter (TX) output peak power and hence is well suited for implementation using low-supply-voltage CMOS processes. To avoid saturating the receiver (RX) under CW operation, FMCW radars must achieve high TX-to-RX isolation in the front-end. Typically, at least 40dB of isolation is necessary for W-band (75 to 85GHz) FMCW radars, which usually employ separate TX and RX antennas. Hence, this requirement dictates the minimum achievable radar size as a typical W-band planar antenna array requires a footprint of about 10cm2. Sharing a single antenna between RX and TX is thus highly desirable to reduce the overall form factor, which is paramount for portable systems. As a result, different analog and digital TX leakage-cancellation circuit techniques have been proposed to support single-antenna operation [1], [2]. In this work, we present a single-antenna TRX SoC and module design for an 80GHz FMCW radar featuring continuous-time adaptive leakage cancellation. © 2020 IEEE
  6. Keywords:
  7. Antenna arrays ; Continuous time systems ; Continuous wave radar ; Frequency modulation ; Medical imaging ; Millimeter waves ; Mobile antennas ; Radar antennas ; System-on-chip ; Circuit techniques ; Consumer applications ; Frequency modulated continuous wave radars ; Low supply voltages ; Millimeter wave radar ; Planar antenna arrays ; Transmitters (Tx) ; TX leakage cancellation ; Microwave antennas
  8. Source: 2020 IEEE International Solid-State Circuits Conference, ISSCC 2020, 16 February 2020 through 20 February 2020 ; Volume 2020 , February , 2020 , Pages 88-90
  9. URL: https://ieeexplore.ieee.org/document/9063129