Vector Modulator Based Leakage Cancellation Technique for CW Radar Transceiver Frontends
- Resource Type
- Conference
- Authors
- Sutbas, Batuhan; Eissa, Mohamed Hussein; Kahmen, Gerhard
- Source
- 2023 IEEE Radio and Wireless Symposium (RWS) Radio and Wireless Symposium (RWS), 2023 IEEE. :88-90 Jan, 2023
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Engineered Materials, Dielectrics and Plasmas
Engineering Profession
Fields, Waves and Electromagnetics
General Topics for Engineers
Photonics and Electrooptics
Power, Energy and Industry Applications
Signal Processing and Analysis
Low voltage
Wireless sensor networks
Frequency modulation
Radar tracking
BiCMOS integrated circuits
Transceivers
Frequency measurement
integrated circuit
mm-wave
low-power
low-voltage
continuous wave (CW)
interferometry
medical radar
vital signs detection
leakage cancellation
silicon-germanium
- Language
- ISSN
- 2164-2974
Millimeter-wave radar systems have been continuously developed until present day to accurately monitor the vital signs of humans non-invasively with recent research focused on enabling battery powered portable operation. To this end, the design of a low-voltage low-power V-band radar transceiver chip based on an advanced SiGe BiCMOS technology is presented in this paper. The LO-scalable chip equipped with BPSK and vector modulators consumes 60mA from a supply of 1.5 V. A low-power radar sensor built with this chip is operated at 59.2GHz in CW interferometry-mode to track sub-mm movements of targets vibrating with sub-Hz frequencies. The two main contributors of dc offset at the I/Q receiver output, LO-to-RX and TX-to-RX leakage signals, are canceled out by adjusting their phase using the modulators. This technique eliminates the dc offset up to 200mV and allows the measurement of sub-Hz frequency movements making it a viable option for vital signs detection.