High electric field effects on gigahertz dielectric properties of water measured with microwave microfluidic devices

Chunrong Song; Pingshan Wang
May 2010
Review of Scientific Instruments;May2010, Vol. 81 Issue 5, p054702
Academic Journal
Silicon microstrip line devices with 260 nm planar microfluidic channels are fabricated and used to investigate water dielectric saturation effects. Microwave scattering parameter measurements are conducted from 1 to 16 GHz under different uniform dc electric fields. When the applied dc field is increased to ∼1 MV/cm, the measured transmission coefficient S21 is increased up to 18 dB, which indicates a large change in water dielectric properties. Extracted water permittivity ([variant_greek_epsilon]=[variant_greek_epsilon]′+j[variant_greek_epsilon]″) shows that [variant_greek_epsilon]′ and [variant_greek_epsilon]″ are changed up to 70% and 50%, respectively.


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