Complex permittivity measurements at Ka-Band using rectangular dielectric waveguide

The rectangular dielectric waveguide (RDWG) technique has been developed fo r the determination of the dielectric constant of materials from effective refractive index measurements in the Q and W bands. This paper describes th e use of an optimization method in conjunction with the RDWG technique for the determination of both the dielectric constant and loss tangent of mater ials at Ka-Band. The effect of the uncertainty in the measured sample thick ness is presented.