A W-Band 4 GHz-BW Multi-User Interference-Tolerant Radar with 28-nm CMOS Front-Ends

Rulin Huang, Ching Wen Chiang, Chia Jen Liang, Yanghyo Kim, Yen Cheng Kuan, Mau Chung Frank Chang

Research output: Contribution to journalArticlepeer-review


This paper presents a 89-93 GHz interference-tolerant radar supporting simultaneous operations of multiple users over a 4-GHz bandwidth. Radar interferences resulted from concurrent transmissions of multiple users can be effectively eliminated by employing frequency hopping (FH) on each radar with a corresponding one-coincidence code. The superheterodyne architecture is adopted for the radar front-ends to ensure the image rejection and LO leakage levels required by the FH agility. Implemented in 28-nm CMOS technology, the transmitter (TX) provides an output power of 7.1 dBm and the receiver (RX) achieves a noise figure of 10 dB and -12 dBm 1dB compression point over the entire band of interest. In addition, a cost-effective TX (RX) module with the CMOS TX (RX) chip and a Rogers patch antenna is developed for over-the-air verifications. The measured range resolution is 3.75 cm. Under a 0.9-V supply, the CMOS front-ends consume 273 mW and occupy 2.75 mm2.

Original languageEnglish
JournalIEEE Solid-State Circuits Letters
StateAccepted/In press - 2020


  • Chirp
  • CMOS radar
  • code-division
  • Interference
  • interference-tolerant
  • Mixers
  • multi-user radar.
  • Radar
  • Radar antennas
  • Radio frequency
  • Time-frequency analysis
  • W-band

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