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PIER PIER B PIER C PIER M PIER Letters
2023-08-14
A Novel Noncontact Ku-Band Microwave Radiometer for Human Body Temperature Measurements
By
Hang Tian,

    Dr. Hang Tian

    Electronic Information Engineering

    Beihang University

    China

    Homepage

Xiaodong Zhuge,

    Dr. Xiaodong Zhuge

    School of Electronics and Information Engineering

    Beihang University

    China

    Homepage

Anyong Hu,

    Dr. Anyong Hu

    School of Electronics and Information Engineering

    Beihang University

    China

    Homepage

Qingli Dou,

    Dr. Qingli Dou

    Emergency Department

    People's Hospital of Shenzhen Baoan District

    China

    Homepage

Jungang Miao

    Dr. Jungang Miao

    School of Electronics and Information Engineering

    Beihang University

    China

    Homepage

Progress In Electromagnetics Research, Vol. 178, 18-36, 2023
doi:10.2528/PIER23042503
Abstract
In emergency departments and ICUs, a novel noncontact thermometer is urgently required to measure physical temperatures through common clothing to accomplish body temperature precise measurement for critical patients. Hence, a Ku band digital auto gain compensative microwave radiometer is proposed to get a higher theoretical temperature measurement sensitivity than a Dicke radiometer, benefit miniaturization design and reduce attenuation caused by common clothing. Meanwhile, a novel compensation method for receiver calibration is proposed to improve temperature sensitivity under non-ideal conditions, and the revised systematic calibration method is elaborated. Furthermore, in order to invert body physical temperatures through clothing, a microwave thermal radiation transmission model of clothed human body is constructed, and the microwave radiation apparent temperature equation of clothed human body is derived. Importantly, three groups of experiments are set up to confirm the designed radiometer's performance, especially the biological tissue temperature measurement. Results show that: 1) the designed radiometer has high temperature sensitivity and accuracy for unsheltered targets; 2) amplitude attenuation caused by cotton cloth for Ku band microwave is much smaller than that for infrared thermal radiation; 3) the designed radiometer can track physical temperatures of targets (such as water and swine skin tissue) sheltered or covered by cotton cloth relatively accurately. In conclusion, our designed Ku band microwave radiometer is certificated to have outstanding performance in temperature measurement for biological tissue through common clothing, which can be developed into a promising product in medical monitoring.
Citation
Hang Tian, Xiaodong Zhuge, Anyong Hu, Qingli Dou, and Jungang Miao, "A Novel Noncontact Ku-Band Microwave Radiometer for Human Body Temperature Measurements," Progress In Electromagnetics Research, Vol. 178, 18-36, 2023.
doi:10.2528/PIER23042503
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