ArticleIEEE transactions on microwave theory and techniques2014
The Design and Operation of Ultra-Sensitive and Tunable Radio-Frequency Interferometers.
Article in IEEE transactions on microwave theory and techniques, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- High-Sensitivity, Quantified, Linear and Mediator-Free Resonator-Based Microwave Biosensor for Glucose Detection.Sensors (Basel, Switzerland) · 2020Article
- Microwave measurement of giant unilamellar vesicles in aqueous solution.Scientific reports · 2018Article
- Multi-Frequency Measurement of Volatile Organic Compounds With a Radio-Frequency Interferometer.IEEE sensors journal · 2017Article
- Auto-Tuning and Self-Calibration of High-Sensitivity Radio Frequency Interferometers.IEEE microwave and wireless components letters : a publication of the IEEE Microwave Theory and Techniques Society · 2016Article
- Analyzing Single Giant Unilamellar Vesicles With a Slotline-Based RF Nanometer Sensor.IEEE transactions on microwave theory and techniques · 2016Article
- Two-stage radio-frequency interferometer sensors.Applied physics letters · 2015Article
- Exploiting Filter Stopband for Radio Frequency Interferometer Operation.IEEE sensors journal · 2015Article
Corrections and comments
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Authors and funding
2 authors.
Funding
Abstract
Dielectric spectroscopy (DS) is an important technique for scientific and technological investigations in various areas. DS sensitivity and operating frequency ranges are critical for many applications, including lab-on-chip development where sample volumes are small with a wide range of dynamic processes to probe. In this work, we present the design and operation considerations of radio-frequency (RF) interferometers that are based on power-dividers (PDs) and quadrature-hybrids (QHs). Such interferometers are proposed to address the sensitivity and frequency tuning challenges of current DS techniques. Verified algorithms together with mathematical models are presented to quantify material properties from scattering parameters for three common transmission line sensing structures, i.e., coplanar waveguides (CPWs), conductor-backed CPWs, and microstrip lines. A high-sensitivity and stable QH-based interferometer is demonstrated by measuring glucose-water solution at a concentration level that is ten times lower than some recent RF sensors while our sample volume is ~1 nL. Composition analysis of ternary mixture solutions are also demonstrated with a PD-based interferometer. Further work is needed to address issues like system automation, model improvement at high frequencies, and interferometer scaling.
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