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An OSRR coupled with microstrip line and integrated with a microfluidic channel proposed as a chemical sensor. The Spacing between OSRR elements with reference to outermost points (Dy) is optimized for all the proposed designs. (a) Simultaneous detection of multiple fluids, a pictorial view; and (b) insertion loss of the microfluidic sensor when permittivity of Fluid B was varied while keeping the permittivity of Fluid A constant (Redrawn from [37]).
