New technique for analysing coplanar lines on ceramic up to 110GHz

A novel four-line, two-geometry (FLTG) measurement technique using coplanar waveguide structures is proposed for investigations on material characteristics from 1 GHz to 110 GHz. This measurement-based technique is simple and efficient when compared with other methods, and provides less uncertainty in the analysis, especially at mm-wave frequencies. The technique has been applied to the characterisation of coplanar lines on ceramic that were fabricated using photoimage able thick-film technology. The key outcome of the work is that it provides means of establishing surface loss at mm-wave frequencies.