Strongly Enhanced Sensitivity in Planar Microwave Sensors Based on Metamaterial Coupling

Limited sensitivity and sensing range are arguably the greatest challenges in microwave sensor design. Recent attempts to improve these properties have relied on metamaterial (MTM)-inspired open-loop resonators coupled to transmission lines (TLs). Although the strongly resonant properties of the resonator sensitively reflect small changes in the environment through a shift in its resonance frequency, the resulting sensitivities remain ultimately limited by the level of coupling between the resonator and the TL. This paper introduces a novel solution to this problem that employs negative-refractive-index TL MTMs to substantially improve this coupling so as to fully exploit its resonant properties. A MTM-infused planar microwave sensor is designed for operation at 2.5 GHz, and is shown to exhibit a significant improvement in sensitivity and linearity. A rigorous signal-flow analysis of the sensor is proposed and shown to provide a fully analytical description of all salient features of both the conventional and MTM-infused sensors. Full-wave simulations confirm the analytical predictions, and all data demonstrate excellent agreement with measurements of a fabricated prototype. The proposed device is shown to be especially useful in the characterization of commonly available high-permittivity liquids as well as in sensitively distinguishing concentrations of ethanol/methanol in water.

[1]  M. Daneshmand,et al.  Dual Active Resonator for Dispersion Coefficient Measurement of Asphaltene Nano-Particles , 2017, IEEE Sensors Journal.

[2]  Chin-Lung Yang,et al.  Thickness and Permittivity Measurement in Multi-Layered Dielectric Structures Using Complementary Split-Ring Resonators , 2014, IEEE Sensors Journal.

[3]  Mojgan Daneshmand,et al.  A Microwave Ring Resonator Sensor for Early Detection of Breaches in Pipeline Coatings , 2018, IEEE Transactions on Industrial Electronics.

[4]  M. Kobayashi,et al.  A dispersion formula satisfying recent requirements in microstrip CAD , 1988 .

[5]  I. Hunter,et al.  Microstrip Resonator Technique for Measuring Dielectric Permittivity of Liquid Solvents and for Solution Sensing , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[6]  Chin-Lung Yang,et al.  Noncontact Measurement of Complex Permittivity and Thickness by Using Planar Resonators , 2016, IEEE Transactions on Microwave Theory and Techniques.

[7]  Derek Abbott,et al.  High-Sensitivity Metamaterial-Inspired Sensor for Microfluidic Dielectric Characterization , 2014, IEEE Sensors Journal.

[8]  D. Dubuc,et al.  A Microwave and Microfluidic Planar Resonator for Efficient and Accurate Complex Permittivity Characterization of Aqueous Solutions , 2013, IEEE Transactions on Microwave Theory and Techniques.

[9]  Øystein Lund Bø,et al.  Application of microwave spectroscopy for the detection of water fraction and water salinity in water/oil/gas pipe flow , 2002 .

[10]  Changjun Liu,et al.  A Microstrip Resonator With Slotted Ground Plane for Complex Permittivity Measurements of Liquids , 2008, IEEE Microwave and Wireless Components Letters.

[11]  Dietmar Kissinger,et al.  Microwave-Based Noninvasive Concentration Measurements for Biomedical Applications , 2013, IEEE Transactions on Microwave Theory and Techniques.

[12]  E. Hammerstad,et al.  Accurate Models for Microstrip Computer-Aided Design , 1980, 1980 IEEE MTT-S International Microwave symposium Digest.

[13]  C. P. Neo,et al.  Microwave Electronics: Measurement and Materials Characterization , 2004 .

[14]  Jiasheng Hong,et al.  Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters , 1996 .

[15]  Jean-Louis Marty,et al.  Twenty years research in cholinesterase biosensors: from basic research to practical applications. , 2006, Biomolecular engineering.

[16]  David J. Rowe,et al.  Novel Microwave Microfluidic Sensor Using a Microstrip Split-Ring Resonator , 2014, IEEE Transactions on Microwave Theory and Techniques.

[18]  Jong-Gwan Yook,et al.  Biosensing using split-ring resonators at microwave regime , 2008 .

[19]  G. Eleftheriades,et al.  Planar negative refractive index media using periodically L-C loaded transmission lines , 2002 .

[20]  Jong-Gwan Yook,et al.  DNA sensing using split-ring resonator alone at microwave regime , 2010 .

[21]  Daniel Segovia-Vargas,et al.  Submersible Printed Split-Ring Resonator-Based Sensor for Thin-Film Detection and Permittivity Characterization , 2016, IEEE Sensors Journal.

[22]  E. Tanabe,et al.  Data analysis of the extraction of dielectric properties from insulating substrates utilizing the evanescent perturbation method , 2006, IEEE Transactions on Microwave Theory and Techniques.

[23]  J. Bobowski.  Using split-ring resonators to measure the electromagnetic properties of materials: An experiment for senior physics undergraduates , 2013, 1811.01449.

[24]  Yi-Chyun Chiang,et al.  A MINIATURIZED OPEN-LOOP RESONATOR FILTER CONSTRUCTED WITH FLOATING PLATE OVERLAYS , 2010 .

[25]  R. Jansen,et al.  Accurate Wide-Range Design Equations for the Frequency-Dependent Characteristic of Parallel Coupled Microstrip Lines , 1984 .

[26]  Witold Pedrycz,et al.  Robust Ultra-High Resolution Microwave Planar Sensor Using Fuzzy Neural Network Approach , 2017, IEEE Sensors Journal.

[27]  Songhui Kim,et al.  Sodium chloride sensing by using a near-field microwave microprobe , 2006 .

[28]  Kiejin Lee,et al.  Noninvasive in vitro measurement of pig-blood d-glucose by using a microwave cavity sensor. , 2012, Diabetes research and clinical practice.

[29]  Jose A. Hejase,et al.  Microwave artificially structured periodic media microfluidic sensor , 2011, 2011 IEEE 61st Electronic Components and Technology Conference (ECTC).

[30]  R. Mongia.  RF and microwave coupled-line circuits , 1999 .

[31]  A. Porch,et al.  Design and In Vitro Interference Test of Microwave Noninvasive Blood Glucose Monitoring Sensor , 2015, IEEE Transactions on Microwave Theory and Techniques.

[32]  Yong-Jun Kim,et al.  A novel relative humidity sensor based on microwave resonators and a customized polymeric film , 2006 .

[33]  K. Entesari,et al.  A Self-Sustained Microwave System for Dielectric-Constant Measurement of Lossy Organic Liquids , 2012, IEEE Transactions on Microwave Theory and Techniques.

[34]  K. Balmain,et al.  Negative Refraction Metamaterials: Fundamental Principles and Applications , 2005 .

[35]  Kai Chang,et al.  Microwave Ring Circuits and Related Structures , 2004 .

[36]  Mojgan Daneshmand,et al.  Compelling impact of intermodulation products of regenerative active resonators on sensitivity , 2017, 2017 IEEE MTT-S International Microwave Symposium (IMS).

[37]  Javier Mata-Contreras,et al.  Splitter/Combiner Microstrip Sections Loaded With Pairs of Complementary Split Ring Resonators (CSRRs): Modeling and Optimization for Differential Sensing Applications , 2016, IEEE Transactions on Microwave Theory and Techniques.

[38]  Kenneth R. Foster,et al.  Noninvasive electrical characterization of materials at microwave frequencies using an open-ended coaxial line: test of an improved calibration technique , 1990 .

[39]  Mojgan Daneshmand,et al.  Microbead-assisted high resolution microwave planar ring resonator for organic-vapor sensing , 2015 .

[40]  J. Nogueira,et al.  Considerations on ultra-trace analysis of phthalates in drinking water. , 2006, Water research.

[41]  J. Stiens,et al.  Sensing liquid properties using split-ring resonator in Mm-wave band , 2010, IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society.

[42]  Omar M. Ramahi,et al.  Material Characterization Using Complementary Split-Ring Resonators , 2012, IEEE Transactions on Instrumentation and Measurement.

[43]  K. Gupta,et al.  Microstrip Lines and Slotlines , 1979 .

[44]  Chin-Lung Yang,et al.  Single-Compound Complementary Split-Ring Resonator for Simultaneously Measuring the Permittivity and Thickness of Dual-Layer Dielectric Materials , 2015, IEEE Transactions on Microwave Theory and Techniques.

[45]  D. Mahmudin,et al.  Environmental liquid waste sensors using polymer multi-coupled ring resonators , 2015, 2015 International Conference on Smart Sensors and Application (ICSSA).

[46]  Barry Friedman,et al.  Real-Time Noninvasive Measurement of Glucose Concentration Using a Microwave Biosensor , 2010, J. Sensors.

[47]  R.D. Pollard,et al.  Sensitivity Analysis and Experimental Investigation of Microstrip Resonator Technique for the in-process Moisture/Permittivity Measurement of Petrochemicals and Emulsions of Crude Oil and Water , 2006, 2006 IEEE MTT-S International Microwave Symposium Digest.

[48]  George V. Eleftheriades,et al.  Coupled-line metamaterial coupler having co-directional phase but contra-directional power flow , 2004 .

[49]  R. Jansen,et al.  Accurate Wide-Range Design Equations for the Frequency-Dependent Characteristics of Parallel Coupled Microstrip Lines (Corrections) , 1985 .

[50]  J. Scheuer,et al.  Matrix analysis of microring coupled-resonator optical waveguides. , 2004, Optics express.

[51]  Marco Donald Migliore,et al.  Partial self-calibration method for permittivity measurement using truncated coaxial cable , 2000 .

[52]  Preecha P. Yupapin,et al.  The serially coupled multiple ring resonator filters and Vernier effect , 2009 .