PN junction integrated varactors for RF applications at different standard frequencies

In this work, new structures based on the PN junction are presented for the design of integrated varactors. In order to optimize the ratio capacitance per unit area (C/A), two varactor geometries have been developed: interdigitated and cross structures. Varactors have been characterized with a specific measurement methodology. A library of varactors that can be used in different RF applications has been implemented with good quality factors and a tuning range around 30%.