Miniaturized Circularly Polarized Doppler Radar for Human Vital Sign Detection

被引：54

作者：

He, Yuchu ^{[1
,2
]}

Gu, Changzhan ^{[3
]}

Ma, Haijiang ^{[1
]}

Zhu, Jiang ^{[1
]}

Eleftheriades, George V. ^{[4
]}

机构：

[1] Google LLC, Mountain View, CA 94043 USA

[2] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3H7, Canada

[3] Shanghai Jiao Tong Univ, Key Lab, Minist Educ Design & Electromagnet Compatibil Hig, Shanghai 200240, Peoples R China

[4] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3H7, Canada

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2019年 / 67卷 / 11期

关键词：

Radar antennas; Doppler radar; Polarization; Couplers; Gain; Circular polarization; patch antenna; HEARTBEAT; RESPIRATION;

D O I：

10.1109/TAP.2019.2927777

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, a miniaturized circularly polarized (CP) continuous wave Doppler radar system operating at 2.4 GHz is presented. The radar front end consists of one left-handed CP (LHCP) antenna and one right-handed CP (RHCP) antenna, which share a single patch antenna aperture. Orthogonal polarization is achieved through a modified ring-shaped quadrature hybrid coupler (QHC), and the resulting isolation between the two CP antennas is better than 30 dB. With 0 dBm input power to the transmitting antenna, the proposed radar system can accurately detect heartbeat and respiration movements of human test subjects under 1 m and over a wide angular range. The single dual CP antenna achieves 280 size reduction compared to a traditional two linear polarization patch antenna array with the same isolation level.

引用

页码：7022 / 7030

页数：9

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