A Frequency Synthesizer Based Microwave Permittivity Sensor Using CMRC Structure | Zendy

Shichang Chen | Zendy; Mengchu Guo | Zendy; Kuiwen Xu | Zendy; Peng Zhao | Zendy; Linxi Dong | Zendy; Gaofeng Wang | Zendy

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A Frequency Synthesizer Based Microwave Permittivity Sensor Using CMRC Structure

Author(s) -

Shichang Chen,

Mengchu Guo,

Kuiwen Xu,

Peng Zhao,

Linxi Dong,

Gaofeng Wang

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2808362

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

In this paper, a high-sensitive microwave dielectric sensor targeted for material permittivity characterization is proposed. A reflective voltage controlled oscillator is devised by virtue of the compact microstrip resonant cell (CMRC) and embedded into a fractional-N phase-locked loop frequency synthesizer. The CMRC structure, covered with material under test, changes its resonating characteristics and, hence, the initial oscillating frequency. Due to the presence of the frequency synthesizer, this frequency shift is finally translated into the controlling voltage variation. In this paper, the material permittivity is extracted by measuring the voltage deviation. Several different samples with known permittivity values are tested to verify the effectiveness of the design sensing platform.

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