In this Letter, a non-destructive microwave resonant sensor based on the modified complementary split-ring resonator has been proposed and analysed with respect to its sensitivity for detecting the aqueous biochemicals. This technique is based on the perturbation theory and only requires to measure resonant frequency and hence, achieving a substantial reduction in the computation time and cost. The proposed sensor is designed to achieve high sensitivity performance with a measured quality factor of the sensor in the bare state, Q _B = 631.5, at the centre frequency of f _o = 6.31 GHz. The proposed sensor has a maximum sensitivity of S = 6.23 MHz with respect to a unit change in the dielectric constant value. A numerical model is developed for the dielectric constant of the biochemicals as a function of the resonant frequency. The proposed sensor, therefore, provides high sensitivity, simple structure layout and real-time response with cost effectiveness. The proposed structure can be a potential candidate for the non-intrusive sensing of aqueous biochemicals.

中文翻译：

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实时非侵入式RF生化传感器

在这封信中，已经提出了一种基于改进的互补开口环谐振器的无损微波谐振传感器，并就其检测含水生化试剂的灵敏度进行了分析。该技术基于微扰理论，仅需要测量谐振频率，因此可大大减少计算时间和成本。拟议中的传感器旨在通过在裸露状态下测得的传感器质量因子来实现高灵敏度性能，问 _B = 631.5，在中心频率处F _o = 6.31 GHz。建议的传感器的最大灵敏度为小号相对于介电常数值的单位变化＝ 6.23MHz。建立了针对生物化学物质的介电常数作为共振频率的函数的数值模型。因此，所提出的传感器提供了高灵敏度，简单的结构布局以及具有成本效益的实时响应。拟议的结构可能是水性生物化学物非侵入式传感的潜在候选者。