TY - GEN
T1 - A Low-Power Low-Latency 84.5-GHz GaAs pHEMT Self-Injection-Locked Radar with Integrated Frequency Differentiator for Vital Sign Detection
AU - Gao, Donglin
AU - Li, Shuping
AU - Zhu, Minning
AU - Chen, Austin Ying Kuang
AU - Wu, Chung Tse Michael
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - A low-power high-sensitivity W-band vital sign radar sensor implemented in a 160/240-GHz fT/fmax 0.1-μ m GaAs pHEMT technology is presented. Based on the self-injection-locked (SIL) architecture, the radar sensor consists of an 84.5-GHz single-transistor oscillator, a directional coupler, an integrated frequency differentiator, and a substrate-integrated waveguide (SIW) monopole antenna. With the proposed integrated first-order mm-wave differentiator, the data post-processing time is significantly accelerated, allowing a tenfold decrease in latency while preserving the sensitivity of the radar sensor. The experimental results validate its effectiveness in accurately detecting the vital sign information (RR and HR) from a human target at a distance of 0.9 m while achieving excellent agreement with the ground truth. Finally, the radar sensor consumes only 46 mW from a 2-V supply.
AB - A low-power high-sensitivity W-band vital sign radar sensor implemented in a 160/240-GHz fT/fmax 0.1-μ m GaAs pHEMT technology is presented. Based on the self-injection-locked (SIL) architecture, the radar sensor consists of an 84.5-GHz single-transistor oscillator, a directional coupler, an integrated frequency differentiator, and a substrate-integrated waveguide (SIW) monopole antenna. With the proposed integrated first-order mm-wave differentiator, the data post-processing time is significantly accelerated, allowing a tenfold decrease in latency while preserving the sensitivity of the radar sensor. The experimental results validate its effectiveness in accurately detecting the vital sign information (RR and HR) from a human target at a distance of 0.9 m while achieving excellent agreement with the ground truth. Finally, the radar sensor consumes only 46 mW from a 2-V supply.
KW - GaAs pHEMT
KW - self-injection-locked (SIL) radar
KW - substrate-integrated-waveguide (SIW)
KW - vital sign detection
KW - W-band
UR - http://www.scopus.com/inward/record.url?scp=85200869629&partnerID=8YFLogxK
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U2 - 10.1109/IMS40175.2024.10600345
DO - 10.1109/IMS40175.2024.10600345
M3 - Conference contribution
AN - SCOPUS:85200869629
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 899
EP - 902
BT - 2024 IEEE/MTT-S International Microwave Symposium, IMS 2024
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2024 IEEE/MTT-S International Microwave Symposium, IMS 2024
Y2 - 16 June 2024 through 21 June 2024
ER -