D-Band FMCW Radar with sub-cm Range Resolution based on a BiCMOS mm Wave IC
- Resource Type
- Conference
- Authors
- Ahmad, Wael A.; Kucharski, Maciej; Ng, Herman Jalli; Kissinger, Dietmar
- Source
- 2021 18th European Radar Conference (EuRAD) European Radar Conference (EuRAD), 2021 18th. :533-536 Apr, 2022
- Subject
- Aerospace
Communication, Networking and Broadcast Technologies
Fields, Waves and Electromagnetics
Antenna measurements
Semiconductor device measurement
Radar cross-sections
Voltage-controlled oscillators
Radar antennas
BiCMOS integrated circuits
Distance measurement
D-band
frequency-modulated continuous-wave (FMCW)
mmWave
radar
range resolution
- Language
This paper demonstrates a sub-cm range resolution of a D-band (110–170 GHz) radar based on a bistatic BiCMOS mmWave IC with on-chip antennas. A wideband ring voltage-controlled oscillator (VCO) is utilized to generate a 20 GHz sweep bandwidth which translates to a frequency-modulated continuous-wave (FMCW) modulation bandwidth of 80 GHz by means of a built-in quadrupler in the radar transceiver chip. A demonstrator board is developed where the FMCW operation is investigated. A ranging precision of 75 µm is verified at 0.5 m without lenses, whereas a 6-dB effective range resolution of 6 mm with Hann window was measured. A calibration against the nonlinearity in the radar output signal due to the very wide bandwidth is discussed. The calibrated range resolution approaches the theoretical limit of 3.8 mm with Hann window.