Novel Microfluidic Structures for Wireless Passive Temperature Telemetry Medical Systems Using Radar Interrogation Techniques in Ka-Band
Novel Microfluidic Structures for Wireless Passive Temperature Telemetry Medical Systems Using Radar Interrogation Techniques in Ka-Band
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DOI：
10.1109/lawp.2013.2242272
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发表时间：
2012-01-01
影响因子：
4.2
通讯作者：
Tentzeris, Manos M.
中科院分区：
文献类型：
--
作者：
Bouaziz, Sofiene;Chebila, Franck;Tentzeris, Manos M.
我们提出了一种新的小型化（低于1毫米（3））温度传感器的基础上微流体技术和雷达被动询问的原则，它可以很容易地应用于温度遥测医疗应用。无芯片微系统是由一个平面间隙电容器与位于其板之间的微通道。微通道内的水的温度依赖性膨胀/收缩以单调的方式改变电容器上的液位。由此产生的有效介电常数的变化以依赖于温度的方式修改电容值。温度微传感器的第一个原型是微机械加工的，并与天线集成在一起，而环境温度则是在29.75 GHz下使用调频连续波（FMCW）雷达询问原理进行远程测量的。初步测量结果表明，在9摄氏度的温度范围内（24摄氏度-33摄氏度）0.4 dBm/摄氏度的灵敏度。
We present a new miniaturized (below 1 mm(3)) temperature sensor based on microfluidic technology and radar passive interrogation principles, which can be easily applied for temperature telemetry for medical applications. The chipless microsystem is made up of a planar-gap capacitor with a microchannel located in between its plates. The temperature-dependent expansion/shrinkage of the water inside the microchannel modifies in a monotonic way the liquid level across the capacitor. The resulting change in the effective permittivity modifies the capacitance value in a temperature-dependent way. The first prototypes of the temperature microsensor were micromachined and integrated with an antenna, while the ambient temperature was remotely measured using frequency-modulated continuous-wave (FMCW) radar interrogation principles at 29.75 GHz. Preliminary measurement results demonstrated a 0.4 dBm/degrees C sensitivity over a 9 degrees C temperature range (24 degrees C-33 degrees C).