TRL-based modeling method of Varactor diodes for 3 mm millimeter-wave application

Based on the simplified circuit model of the commercially available Varactor diode, TRL analysis on quartz is introduced in this paper for the analysis of the passive parts of the diode chip. The diodes chip model in 3mm is setup by the analysis of all the parasitic parameters and working environment. By using TRL arithmetic, the values of lumped elements in the diode chip model are determined. The measured on-wafer results agree well with simulated results of the diode chip. The methods of modified diodes chip model may find its applications in the design of millimeter circuits such as mixers and frequency multipliers.