基于星型缝隙贴片的微流控微波传感器用于食用油品质检测。

College of Electronics and Electrical Engineering, Henan Normal University, Xinxiang 453000, China.

School of Environment, Henan Normal University, Xinxiang 453000, China.

Sensors (Basel). 2022 Aug 25;22(17):6410. doi: 10.3390/s22176410.

In this paper, we present a new microfluidic microwave sensor loaded with a star-slotted patch for detecting the quality of edible oil. The relative dielectric permittivity and the quality of edible oil will change after being heated at a high temperature. Therefore, the quality of edible oil can be detected by measuring the relative dielectric permittivity of edible oil. The sensor is used to determine the edible oil with different dielectric permittivity by measuring the resonance frequency offset of the input reflection coefficient, which operates at 2.68 GHz. This sensor is designed based on a resonant approach to provide the best sensing accuracy and is implemented using a substrate integrated waveguide structure combined with a pentagonal slot antenna operating at 2.3~2.9 GHz. It can detect greasy liquids with the real part of the complex permittivity ranging from two to three.

本文提出了一种新的微流控微波传感器，该传感器加载了星形缝隙贴片，用于检测食用油的质量。食用油在高温下加热后，其介电常数和质量会发生变化。因此，可以通过测量食用油的介电常数来检测食用油的质量。该传感器通过测量输入反射系数的谐振频率偏移来确定具有不同介电常数的食用油，其工作频率为 2.68GHz。该传感器基于谐振方法设计，以提供最佳的传感精度，并采用基片集成波导结构与工作频率为 2.3~2.9GHz 的五边形缝隙天线相结合来实现。它可以检测介电常数实部在 2 到 3 之间的油腻液体。