Super-Regenerative Oscillator Integrated Metamaterial Leaky Wave Antenna for Multi-Target Vital Sign and Motion Detection
Super-Regenerative Oscillator Integrated Metamaterial Leaky Wave Antenna for Multi-Target Vital Sign and Motion Detection
复制标题
用于多目标生命体征和运动检测的超再生振荡器集成超材料漏波天线
DOI：
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发表时间：
2022
影响因子：
3.2
通讯作者：
C. Wu
中科院分区：
文献类型：
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作者：
Yichao Yuan;C. Wu
首次提出了一种集成超再生振荡器结构的新型超材料漏波天线。作为概念验证，所提出的雷达传感器，包括一个一维（1D）MTM LWA和一个可调压控振荡器（VCO），被设计为执行频率相关的空间映射与主波束角度扫描从−50<inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula>到+30<inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula>相对于从1.85到2.85 GHz的变化频率。所提出的SRO集成的MTM LWA系统工作在对数模式下，在晶体管的漏极端口施加猝灭信号。已经进行了实验以表明，当两个人类目标分别沿着-10<inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula>和-30<inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula>的不同扫描角度沿着定位时，可以成功地检测到两个人类目标的生命体征信息。此外，与基于自注入锁定（SIL）架构的MTM LWA雷达传感器相比，使用所提出的雷达传感器可以准确地检测到更远距离的振动运动，表明具有更高的灵敏度和降低的系统复杂性。
A new kind of metamaterial (MTM) leaky wave antenna (LWA) integrated with a super-regenerative oscillator (SRO) architecture is proposed for the first time. As a proof of concept, the proposed radar sensor, including a one-dimensional (1D) MTM LWA and a tunable voltage-controlled oscillator (VCO), is designed to perform frequency-dependent space mapping with the main-beam angle sweeping from −50 <inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula> to +30 <inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula> with respect to the varying frequency from 1.85 to 2.85 GHz. The proposed SRO-integrated MTM LWA system is operated in the logarithmic mode with a quench signal imposed at the drain port of transistor. Experiments have been conducted to show that vital sign information for two human targets can be successfully detected when they are located along different scanning angles of −10 <inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula> and −30 <inline-formula><tex-math notation="LaTeX">$^\circ $</tex-math></inline-formula>, respectively. Furthermore, compared with MTM LWA radar sensor based on the self-injection-locked (SIL) architecture, vibrating motion at a farther distance can be detected accurately using the proposed radar sensor, indicating a higher sensitivity with reduced system complexity.