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Dual-band radio-frequency device for sensing dielectric property changes in microfluidic channel

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4 Author(s)
Jin Shao ; Electrical Engineering Department, University of North Texas, 3940 N. Elm St., Denton, 76207, USA ; Gaurav Manandhar ; Bayaner Arigong ; Hualiang Zhang

We propose a dual-band RF device to detect the dielectric changes in polydimethylsiloxane (PDMS) microfluidic channel. Such a device, which consists of two dual-band Wilkinson power dividers (working at 2GHz and 5GHz) and two 90° dual-band microstrip lines (providing 180° phase difference at two working frequencies), is very sensitive for identifying dielectric material changes. Moreover, by operating at two frequencies simultaneously, it can improve the measurement stability/robustness. Compared with the recently reported RF microfluidic sensor [Yang et al, Lab Chip, 10, 553, (2010)], the proposed device features enhanced measurement stability with the same level of measurement sensitivity (-80dB cancellation level).

Published in:

Antenna Technology (iWAT), 2012 IEEE International Workshop on

Date of Conference:

5-7 March 2012