Research on microstrip complementary curved resonator ring microwave sensor based on radio frequency switch

FU Shiqiang; MA Minghao; XU Zhixia

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Research on microstrip complementary curved resonator ring microwave sensor based on radio frequency switch

Research & Approach | 更新时间：2025-12-30

- Research on microstrip complementary curved resonator ring microwave sensor based on radio frequency switch
- Vol. 44, Issue 12, Pages: 43-47(2025)
- 作者机构：
  
  大连海事大学信息科学技术学院,辽宁,大连,116026
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP212
- Published：2025
- 稿件说明：
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FU Shiqiang, MA Minghao, XU Zhixia. Research on microstrip complementary curved resonator ring microwave sensor based on radio frequency switch[J]. 2025, 44(12): 43-47.
DOI：

FU Shiqiang, MA Minghao, XU Zhixia. Research on microstrip complementary curved resonator ring microwave sensor based on radio frequency switch[J]. 2025, 44(12): 43-47. DOI：

摘要

为满足混合溶液中浓度变化的检测需求，提出了一种基于复介电常数测量的差分微波传感器。该传感器采用射频开关技术，通过切换参考支路与检测支路进行差分处理，从而抑制环境的干扰；采用改进型微带互补弯曲谐振环结构，通过增大电容耦合来增强电场，从而提高传感器的灵敏度。当检测不同体积分数下的二元液体混合物(水—乙醇)时，根据传感器的谐振频率以及品质因数

的测量结果，得到关于复介电常数的拟合经验公式。再通过注入水—甲醇混合溶液验证了公式的正确性，并且计算结果与Debye函数吻合良好。实验结果证明:该传感器对于混合溶液的浓度检测具有良好的灵敏度和精度。

Abstract

A differential microwave sensor based on measurement of complex permittivity is presented to meet the needs of detecting concentration variations in mixed solutions.In order to suppress environmental interference

the sensor employs radio frequency switching technology which performs differential processing between the reference by-pass and the sensing by-pass.The improved microstrip complementary curved ring resonator enhances the electric field by increasing capacitive coupling which can improve the sensor’s sensitivity greatly.When detecting binary liquid mixtures(water-ethanol)of different volume fractions

the fitted empirical formulas regardin

g complex permittivity are derived from the measurements of the sensor’s resonant frequency and quality factor

.The formulas are then validated by injecting water-methanol mixtures

and the calculated results show great agreement with the Debye function.Experimental results confirm that the sensor possesses excellent sensitivity and precision for the concentration detection of mixed solutions.

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