Abstract

‘Seed corn funding’ for innovative technologies from the Plymouth University Innovation team has led to
development of a new patented planar evanescent microwave sensor with an internally fabricated recessed
cavity for use with liquid samples in a range of potential aqueous applications, such as refractive index sensing.
Here we present microwave transmission results for a series of polar and non-polar fluids inserted into the
internal cavity of a microwave channel waveguide, and investigate the recess sensing response.