Title :
Microwave Liquid Sensing Based on Interferometry and Microscopy Techniques
Author :
Haddadi, Kamel ; Bakli, H. ; Lasri, T.
Author_Institution :
Inst. d´´Electron. de Microelectron. et de Nanotechnol. (IEMN-DHS), Villeneuve-d´´Ascq, France
Abstract :
A microwave technique based on the high spatial resolution of microscopy tools and the unique measurement accuracy of interferometric methods is demonstrated. In particular, we have investigated the sodium chloride concentration in an aqueous solution volume of 144 mm3 at the test frequency of 2.45 GHz. By measuring the reflection coefficient, we have observed a measurement sensitivity of 78 dB/(mol/l) in the range of 0-0.22 mol/l. This method provides a unique approach for high sensitive liquid sensing applications.
Keywords :
electromagnetic wave interferometry; microscopy; microwave detectors; microwave measurement; organic compounds; aqueous solution; frequency 2.45 GHz; high spatial resolution; interferometry techniques; measurement sensitivity; microscopy techniques; microscopy tools; microwave liquid sensing; reflection coefficient measurement; sensitive liquid sensing applications; sodium chloride concentration; unique measurement accuracy; Liquids; Microscopy; Microwave measurements; Microwave theory and techniques; Probes; Sensitivity; Sensors; Evanescent waves; interferometry; liquid sensing; near-field microwave microscopy;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2012.2218230
