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Improve planar multiple split-ring sensor for microwave detection applications
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DOI：10.1016/j.sna.2019.111542.png)
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Abstract
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In this paper, a sub-wavelength resonance sensor is proposed to microwave detection applications. A meta-material element-multiple split ring resonators (MSRR) is used to improve the sensitivity of the sensor. Therefore, the sensor is based on micro-strip technology and consists of a micro-strip and a MSRR. It is observed that the strongest electric field of the sensor can achieve to 10(5) V/m. So the sensor is very sensitive to capture changes of dielectric signals. Some experiments were carried out using the fabricated sensor, and a network analyzer (AV3609D) with liquids under test (LUT) inserted the sensor. Furthermore, primary finite element analysis and test results are used to compare the MSRR-based and a general complementary split ring resonator (CSRR)-based sensing sensor, demonstrating sensitivity improvement of up to 1.3 times. The proposed MSRR-based sensor has stronger coupling between the micro-strips of the open-loops of the MSRR5, which can reduce the reflection and dimension of the sensor. Therefore, this sensor is well suited for low-cost, real-time, and CMOS compatible sensing technologies. (C) 2019 Elsevier B.V. All rights reserved.
Keywords:
Sub-wavelength resonance
MSRR
Sensor
Dielectric property
Microwave sensing
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