A comprehensive study on the planar type of Goubau line for millimetre and submillimetre wave integrated circuits

Modifications of the traditional Goubau line into its planar type for implementation to integrated circuits of millimetre and submillimetre waves are studied in frequency range 100–400 GHz. Features and performances of this new type of transmission lines are studied for different line configurations, different dimensions and new materials with low dielectric constants. To improve the performance of this type of transmission line, perforated dielectrics or new dielectrics are used to reduce the permittivity of the supporting and adjacent slabs. Selections of line parameters are demonstrated and compared. Both miniature hybrid microwave integrated circuit and microwave integrated circuit compatible configurations are studied and discussed. Some results of characteristic impedance of this type of lines are also reported.