Higher order modes as accuracy limiting factor in permittivity measurements of high lossy fluids using transmission techniques in the GHz range.
Redhardt A, Steinhoff, HJ, Schlitter J, Neumann HJ, Hess G
The higher order mode distortion in measuring dielectric constants on high
lossy, high permittivity liquids in the GHz range is investigated by a
simulation procedure as well as by experiment. For this, a homodyne method
for measuring epsilon * is introduced in analogy to precision EPR-work.